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Journal articles on the topic 'Subvolcanic Bodies'

Author: Grafiati

Published: 3 June 2025

Last updated: 31 July 2025

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1

Armienti, Pietro, Claudia Corazzato, Gianluca Groppelli, Emanuele Natoli, and Giorgio Pasquarè. "Geological and Petrographical study of Montecampione Triassic subvolcanic bodies (Southern Alps, Italy): preliminary geodynamic results." Boll. Soc. Geol. It. Volume speciale n. 2 (2003), no. 2 (2003) (2003): 67–78. https://doi.org/10.5281/zenodo.836827.

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The research began with a geological and structural survey of the Triassic subvolcanic bodies cropping out in the area of Montecampione (Val Camonica-BS, Italy). This study allowed the determination of the main phases of intrusion of these bodies, and new and significant sampling of the magmatic rocks in order to reconstruct the geodynamic framework based on high quality geochemical analyses. These intrusive bodies, belonging to the «Montecampione group», show a minimum volume of about 1 km3 and could represent a shallow (about 1000 m) magmatic reservoir producing a volcanic area, since we rec

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Ostapenko, Nikolay, and Olga Neroda. "On the genesis of the gold-silver deposit Kupol (North-East of Russia)." Domestic geology, no. 4-5 (October 27, 2020): 39–47. http://dx.doi.org/10.47765/0869-7175-2020-10022.

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A new version of genesis of the epithermal gold-silver deposit Kupol (Chukotka), its mineral composition of ores and conditions of ore-localization based on the analysis of published geological materials on the geological structure had purposed in this article. The active thermal ore-forming role of completing the volcanic cycle of the multiphase subvolcanic complex’ the proximal bodies of the Upper Cretaceous rhyolites had been proved. The main factors of this deposit’ formation and the conditions that favored the appearance of large ore bodies and rich ores were considered. The magma chamber

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Kokovkin, Aleksandr. "On the genesis of the gold-silver deposit Kupol (North-East of Russia)." Domestic geology, no. 4-5 (October 27, 2020): 48–63. http://dx.doi.org/10.47765/0869-7175-2020-10023.

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A new version of genesis of the epithermal gold-silver deposit Kupol (Chukotka), its mineral composition of ores and conditions of ore-localization based on the analysis of published geological materials on the geological structure had purposed in this article. The active thermal ore-forming role of completing the volcanic cycle of the multiphase subvolcanic complex’ the proximal bodies of the Upper Cretaceous rhyolites had been proved. The main factors of this deposit’ formation and the conditions that favored the appearance of large ore bodies and rich ores were considered. The magma chamber

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4

Kucharič, Ľudovít, Vladimír Bezák, Dušan Majcin, and Ján Vozár. "Carbonate complexes underlying Flysch belt and subsurface Neogene volcanic in the NE part of Slovakia – a potential for geothermal energy and raw materials." Contributions to Geophysics and Geodesy 42, no. 4 (2012): 283–94. http://dx.doi.org/10.2478/v10126-012-0013-8.

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Abstract A positive gravity anomaly was observed in the Flysch belt realm. Based on this fact and available geological knowledge we suppose that the source of gravity anomaly might be carbonate rocks lying perhaps in the footwall of Flysch sediments. The carbonates belong perhaps to the Penninic crust cover (a part of Klippen belt), or to lower structural stage of the Flysch belt. Besides this it is interpreted more volume of Neogene subvolcanic bodies in the frame of the Flysch belt based on the results of the newest magnetic measurements in the NE part of Slovakia (Kucharič et. al., in press

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Pasenko, A. M., I. V. Fedyukin, and V. E. Pavlov. "TWO PULSES OF MAGMATIC ACTIVITY DURING THE EARLY RIPHEAN KUONAMKA IGNEOUS PROVINCE FORMATION: PALEOMAGNETIC SUBSTANTIATION OF THE HYPOTHESIS." Geodynamics & Tectonophysics 15, no. 2 (2024): 0748. http://dx.doi.org/10.5800/gt-2024-15-2-0748.

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By the beginning of the 20th century, at least ten different generations of intrusive mafic bodies 1800–900 Ma were distinguished on the territory of the Anabar massif. The first modern age estimates, however, indicate the formation of the bulk of these bodies in a relatively short period of time ~1480–1500 Ma. Based on geochronological and paleomagnetic data, intrusive bodies with this age were combined into the Kuonamka large igneous province (LIP). However, a complex of paleomagnetic studies indicated the probable existence of at least two pulses of magmatic activity during the formation of

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Parada, Sergei G. "Petrochemical Features and Formation Affiliation of Igneous Rocks of the Kondakov Uplift (Eastern Donbass)." UNIVERSITY NEWS. NORTH-CAUCASIAN REGION. NATURAL SCIENCES SERIES, no. 4-2 (December 23, 2024): 59–66. https://doi.org/10.18522/1026-2237-2024-4-2-59-66.

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The ore specialization of mineral manifestations associated with igneous rocks depends on the formation affiliation of the latter, since specific igneous formations are characterized by a certain type of metallogeny. Therefore, the identification of the formation affiliation of igneous rocks of the Kondakov tectonic uplift (KTU) makes it possible to assess metallogenic specialization and make a forecast of mineralization. For this purpose, geological mapping data and the results of prospecting works, 145 chemical analyses of igneous rocks were used. The identification of magmatic bodies was ca

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Tau, M. M., R. Bolhar, A. H. Wilson, and C. R. Anhaeusser. "The petrogenesis and emplacement mechanism of layered ultramafic-mafic complexes of the Barberton Greenstone Belt: Insights from the Stolzburg Complex, South Africa." South African Journal of Geology 125, no. 2 (2022): 133–66. http://dx.doi.org/10.25131/sajg.125.0013.

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Abstract Ultramaﬁc-maﬁc layered complexes are important but not-well studied components of Archaean granitoid-greenstone terranes. In the vicinity of the Barberton Greenstone Belt (BGB), at least 27 such complexes are intimately associated with the supracrustal succession. The petrogenesis of one of these layered bodies, the Stolzburg Complex (SC), is explored, together with its relationship to the surrounding Barberton volcanic succession. Previous models for the origin of Barberton layered complexes proposed a variety of mechanisms, such as single chamber subvolcanic sills, ponded lavas, and

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8

Platten, I. M., and M. S. Money. "Formation of late Caledonian subvolcanic breccia pipes at Cruachan Cruinn, Grampian Highlands, Scotland." Transactions of the Royal Society of Edinburgh: Earth Sciences 78, no. 2 (1987): 85–103. http://dx.doi.org/10.1017/s0263593300011007.

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ABSTRACTPipe-shaped breccia bodies associated with diorite intrusions are composed mainly of angular clasts of local schists with a few transported clasts of quartzite. Plate shaped fragments are commonly oriented to define planar fabrics in the breccias. These features indicate the operation of gas fluidisation within the pipes and both entrainment and expanded bed conditions are inferred. The fabrics result from the collapse of the fluidised suspensions as the gas flow declined. Dilational fracture patterns in the country rock comparable with the stress release patterns found around mine sha

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9

STEPANOV, VITALY, and ANTON MELNIKOV. "THE SNEZHINKA GOLD ORE DEPOSIT IN THE URKINSKY ORE-PLACER CLUSTER OF THE AMUR PROVINCE." Domestic geology, no. 3 (July 14, 2022): 22–31. http://dx.doi.org/10.47765/0869-7175-2022-10013.

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The article is devoted to characteristics of the Snezhninka gold deposit in the Urkinsky ore-placer cluster of the Amur gold-bearing province. It presents information on the structural-geological position and geological features of the deposit, regularities of distribution of the ore bodies, and the ore composition. The ore bodies are represented by zones of quartz-veinlet silicification and, more rarely, by carbonate-quartz veins among beresitized granites. The ore minerals, comprising no more than a few percent of the ore volume, are represented by pyrite, chalcopyrite, arsenopyrite, galena,

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Pécskay, Zoltán, Alexandra Harkovska, and Alexander Hadjiev. "K-Ar dating of Mesta volcanics (SW Bulgaria)." Geologica Balcanica 30, no. 1-2 (2000): 3–11. http://dx.doi.org/10.52321/geolbalc.30.1-2.3.

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The Mesta volcanic massif (SW Bulgaria) belongs to the Macedonian-Rhodope-North Aegean Magmatic Zone. It crops out along the middle course of Mesta River and covers about 200 km2 of the homonymous graben. The bаsеmеnt of Mesta graben and the neighbouring elevated blocks of Pirin and Western Rhodope mountains are composed of high-grade metamorphics, hosting granitoidic plutons of diverse ages, including the Paleogene Central Pirin and Teshevo plutons. Apart from the volcanic bodies, the graben-fill consists of complexly interfingered Paleogene stratified continental terrigenous sedimentary rock

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Sysolin, A. I., and N. V. Pravikova. "Subvolcanic bodies of the Bodrak Complex in the Southwestern Crimea: Structure, composition, and formation conditions." Moscow University Geology Bulletin 63, no. 2 (2008): 79–85. http://dx.doi.org/10.3103/s0145875208020038.

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Luchitskaya, М. V., М. V. Gertseva, and I. V. Sysoyev. "Geodynamics and Early Cretaceous Magmatism of the Northern Volcanic-Plutonic Belt of Verkhoyan-Kolyma Fold Area (Northeastern Russia)." Геотектоника, no. 5 (September 1, 2023): 96–120. http://dx.doi.org/10.31857/s0016853x23050053.

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New data on the geological position, U‒Pb SIMS zircon ages, petro-geochemical features, Sr‒Nd isotopic composition and geodynamic setting of the granitoids and volcanites of the Northern volcanic-plutonic belt, Verkhoyan-Kolyma fold area, are presented. Magmatites of the belt include granitoids of Elikchan, Kuranakh, Bakyn plutons, composed of elikchansky granite-granodiorite complex, and volcanites of predominantly intermediate-felsic Tumusskaya sequence with subvolcanic bodies of the same composition. They form single Early Cretaceous (127–121 Ma) volcanic-plutonic assemblage. Granitoid plut

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Seravina, Tatiana V., Svetlana V. Kuznetsova, Lyudmila K. Filatova, Alexander I. Donets, and Viktor D. Konkin. "Localization features of pyrite-polymetallic oresof the Tushkanikhinskoye deposit (Rudny Altai)." Ores and metals, no. 4 (January 11, 2023): 102–18. http://dx.doi.org/10.47765/0869-5997-2022-10024.

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The Tushkanikhinskoye deposit is confined to the Devonian basalt-bearing rhyolite calcareous-siliceousterrigenous formation, which is represented by sedimentary, volcano-sedimentary, sedimentary-volcanogenic, pyroclastic, volcanic rocks of felsic and basic composition, as well as their subvolcanic equivalents. Felsic volcanogenic rocks show signs of ignimbrites. Primary pyrite-polymetallic ores with an uneven distribution of the main sulfi sphalerite, pyrite, galena, and chalcopyrite have been identified. The presence of collomorphic, framboidal and granoblastic pyrite in the ores, as well as

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Mollo, Silvio, Paola Tuccimei, Michele Soligo, Gianfranco Galli, Gianluca Iezzi, and Piergiorgio Scarlato. "Transient to stationary radon ( 220 Rn) emissions from a phonolitic rock exposed to subvolcanic temperatures." Royal Society Open Science 6, no. 10 (2019): 190782. http://dx.doi.org/10.1098/rsos.190782.

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Rock substrates beneath active volcanoes are frequently subjected to temperature changes caused by the input of new magma from the depth and/or the intrusion of magma bodies of variable thickness within the subvolcanic rocks. The primary effect of the influx of hot magma is the heating of surrounding host rocks with the consequent modification of their physical and chemical properties. To assess mobilization in subvolcanic thermal regimes, we have performed radon ( 220 Rn) thermal experiments on a phonolitic lava exposed to temperatures in the range of 100–900°C. Results from these experiments

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15

Cajz, Vladimír, Vladislav Rapprich, Vojtěch Erban, Zoltan Pécskay, and Miroslav Radoň. "Late Miocene volcanic activity in the České středohoří Mountains (Ohře/Eger Graben, northern Bohemia)." Geologica Carpathica 60, no. 6 (2009): 519–33. http://dx.doi.org/10.2478/v10096-009-0038-8.

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Late Miocene volcanic activity in the České středohoří Mountains (Ohře/Eger Graben, northern Bohemia)First occurrences of superficial bodies of Late Miocene volcanic activity were found in the western part of the České středohoří Volcanic Complex (CSVC) and extended our knowledge of its volcanostratigraphy. Their K-Ar ages (9.59, 9.61 and 11.36 Ma) correspond to the age of alkaline basaltic rocks of the youngest known Intrusive Suite of this area. Unlike the previously known subvolcanic bodies of this system, the newly observed bodies are represented by superficial products: two scoria cones w

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Филиппович, А. В., and Л. А. Золотая. "ANALYSIS OF RETROSPECTIVE GEOLOGICAL AND GEOPHYSICAL MATERIALS ON STUDY OF BODRAK SUBVOLCANIC COMPLEX IN CRIMEA." ГЕОФИЗИКА, no. 6.2021 (December 27, 2021): 125–33. http://dx.doi.org/10.34926/geo.2021.6.2021.001.

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Магматические тела бодракского субвулканического комплекса Крыма более двухсот лет привлекают внимание геологов. Анализ ретроспективных геологических и геофизических материалов в пределах зоны сочленения Равнинного и Горного Крыма показал большое количество дискуссионных вопросов, касающихся геотектонической истории формирования магматических образований. В статье авторы обсуждают ретроспективные региональные и детальные гравиметрические и магнитометрические материалы по уникальному объекту, называемому Почтовской магнитной аномалией. Результаты магнитного моделирования, выполненного авторами

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17

Kovacs, Marinel, Zoltán Pécskay, Alexandrina Fülöp, Maria Jurje, and Oscar Edelstein. "Geochronology of the Neogene intrusive magmatism of the Oaș—Gutâi Mountains, Eastern Carpathians (NW Romania)." Geologica Carpathica 64, no. 6 (2013): 483–96. http://dx.doi.org/10.2478/geoca-2013-0033.

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Abstract Earlier geological work in the Oaș-Gutâi Mts (OG), Eastern Carpathians, has revealed the extensive presence of shallow subvolcanic intrusive bodies, both exposed on the surface and covered by Paleogene-Neogene sedimentary sequences and Neogene volcanic formations. This study is based on detailed mapping and sampling of the OG Neogene intrusive magmatic rocks. Thirty seven representative intrusions (sills, dykes, microlaccoliths, etc.) were selected for radiometric dating. These intrusions show a wide variety of petrographic rock-types: from microgabbros to microgranodiorites and from

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Katz, Laura R., Daniel J. Kontak, Benoît Dubé, and Vicki McNicoll. "The geology, petrology, and geochronology of the Archean Côté Gold large-tonnage, low-grade intrusion-related Au(–Cu) deposit, Swayze greenstone belt, Ontario, Canada." Canadian Journal of Earth Sciences 54, no. 2 (2017): 173–202. http://dx.doi.org/10.1139/cjes-2016-0007.

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The Archean Côté Gold Au(–Cu) deposit is the first large gold deposit discovered in the Swayze greenstone belt of the Abitibi Subprovince. The deposit is a low-grade, large-tonnage type with a combined indicated and inferred resource of 8.65 M oz Au (245.2 t Au). The deposit is hosted by the Chester intrusive complex (CIC), a multiphase, subvolcanic intrusion composed of low-Al tonalite, diorite, and quartz diorite, plus magmatic and hydrothermal breccia bodies. The age of the tonalite and dioritic phases is constrained at 2741–2739 ± 1 Ma using high-precision isotope dilution – thermal ioniza

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García-Chinchilla, Daniel Alejandro, and Silvio Roberto Farias Vlach. "Geological mapping of intrusive rocks: a case study in the Garzón region, the Eastern Cordillera of the Colombian Andes." Geologia USP. Série Científica 19, no. 4 (2019): 43–62. http://dx.doi.org/10.11606/issn.2316-9095.v19-158365.

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Jurassic granites (sensu lato) and related rocks are the most abundant rocks cropping out in the Eastern Cordillera of Colombia in the northern Andes. We present an attempt to map and characterize in detail the petrographic diversity of the Jurassic granites and related subvolcanic rocks emplaced in the Garzón region, southernmost the Eastern Cordillera. We also provide new geological maps for the Algeciras and Altamira Plutonic Massifs based on descriptive concepts of the petrographic facies and facies associations and detailed petrographic and mineralogical characterizations of the observed

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Pécskay, Zoltán, Ioan Seghedi, Marinel Kovacs, Alexandru Szakács, and Alexandrina Fülöp. "Geochronology of the Neogene calc-alkaline intrusive magmatism in the "Subvolcanic Zone" of the Eastern Carpathians (Romania)." Geologica Carpathica 60, no. 2 (2009): 181–90. http://dx.doi.org/10.2478/v10096-009-0012-5.

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Geochronology of the Neogene calc-alkaline intrusive magmatism in the "Subvolcanic Zone" of the Eastern Carpathians (Romania)The Poiana Botizei-Ţibleş-Toroiaga-Rodna-Bârgâu intrusive area (PBTTRB), northwest Romania, known as the "Subvolcanic Zone", is located between the Gutâi (NW) and Câlimani (SE) volcanic massifs. It consists of rocks displaying a wide range of compositions and textures: equigranular or porphyritic with holocrystalline groundmass (gabbro-diorites, diorites, monzodiorites and granodiorites), and/or porphyritic with fine holocrystalline or glassycryptocrystalline groundmass,

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Mytrokhyn, O., V. Bakhmutov, and L. Gavryliv. "INTRUSIVE-MAGMATIC COMPLEXES OF WILHELM ARCHIPELAGO, WEST ANTARCTICA (PART 2 – HYPABYSSAL AND SUBVOLCANIC DYKE ROCKS)." Visnyk of Taras Shevchenko National University of Kyiv. Geology, no. 3(98) (2022): 5–14. http://dx.doi.org/10.17721/1728-2713.98.01.

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The second part of the work "Intrusive-magmatic complexes of Wilhelm Archupelago, West Antarctica" is devoted to dykes. The authors studied dyke rocks in the Ukrainian Antarctic Station area in order to specify their petrographic diversity as well as to clarify the spatial distribution of the dykes, their geological position, age and geological relationships with other igneous formations in the region. It was found that hypabyssal and subvolcanic dykes of the Mesozoic-Cenozoic age are widespread on the Wilhelm Archipelago. The most common composition are mafic and intermediate rocks namely mic

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Stepanov, V. A. "О геологическом и изотопном возрасте золоторудных месторождений на примере золото-серебряного месторождения Кубака (Северо-Восток России)". Bulletin of the North-East Science Center, № 1 (29 березня 2021): 3–12. http://dx.doi.org/10.34078/1814-0998-2021-1-3-12.

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Information on the geological and isotopic age of the Kubaka gold-silver deposit in the Omolon middle massif in the North-East of Russia is presented. It has been established that the Kubaka deposit geological age lies in between the Late Devonian age of the Kedon series volcanites, containing the gold-silver mineralization, and the Early Carboniferous age of the Korbinsky suite terrigenous rocks, overlapping the volcanites and the mineralization. The post-ore nature of the Omolon complex dykes, which produce no significant impact on the distribution of gold mineralization in ore bodies, is sh

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Georgiev, Stoyan, Anna Lazarova, Eleonora Balkanska, Kalin Naydenov, Igor Broska, and Sergiy Kurylo. "Time constraints on the Variscan magmatism along Iskar River Gorge and Botevgrad basin, Bulgaria." Review of the Bulgarian Geological Society 85, no. 2 (2024): 159–62. https://doi.org/10.52215/rev.bgs.2024.85.2.159.

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The Variscan basement outcropping along the Iskar River Gorge and in the Botevgrad basin gives a perfect opportunity to study the entire late Carboniferous to early Permian magmatic episode including several stages. The initial stage of a K-alkaline magmatism at 330 to 310 Ma, which points to a melting of enriched mantle source, was followed by a voluminous calk-alkaline to K calk-alkaline magmatism and emplacement of several plutons in the interval between 309 and 306 Ma as well as volcanics (307.4±2.2 Ma). Coeval sporadic K-alkaline events are constrained as well. During the third stage, in

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24

Mikhalsky, E. V., J. W. Sheraton, A. A. Laiba, and B. V. Beliatsky. "Geochemistry and origin of Mesoproterozoic metavolcanic rocks from Fisher Massif, Prince Charles Mountains, East Antarctica." Antarctic Science 8, no. 1 (1996): 85–104. http://dx.doi.org/10.1017/s0954102096000120.

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Fisher Massif consists of Mesoproterozoic (c. 1300 Ma) lower amphibolite-facies metavolcanic rocks and associated metasediments, intruded by a variety of subvolcanic and plutonic bodies (gabbro to granite). It differs in both composition and metamorphic grade from the rest of the northern Prince Charles Mountains, which were metamorphosed to granulite facies about 1000 m.y. ago. The metavolcanic rocks consist mainly of basalt, but basaltic andesite, andesite, and more felsic rocks (dacite, rhyodacite, and rhyolite) are also common. Most of the basaltic rocks have compositions similar to low-K

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Khubanov, V. B., K. D. Dolgoborodova, A. A. Tsygankov, et al. "GEOCHEMISTRY AND AGE OF MAFIC DYKES OF THE Be-DEPOSIT SNEZNOE: LATE PALEOZOIC MANTLE PLUME MAGMATISM EVIDENCE IN EASTERN SAYAN." Доклады Российской академии наук. Науки о Земле 508, no. 1 (2023): 37–43. http://dx.doi.org/10.31857/s2686739722601909.

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Within the East Sayan rift zone of the Late Paleozoic Barguzin salic large igneous province (SLIP), along with alkaline-peralkaline granitoids with ore mineralization, mafic subvolcanic bodies (gabbroids, mafic dykes) are common. One of the typomorphic mafic – peralkaline granitoid association is the Snezhnoye beryllium deposit. Using the U–Pb LA–ICP–MS method, mafic dykes of the Snezhnoye beryllium deposit were dated. The age of zircons from the diabase (dolerite) dyke was 301 ± 6 Ma, and from the microgabbro one, 297 ± 2 Ma. The obtained dates are close to the age of fluorite-beryl mineraliz

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Abad, Isabel, Juan Jiménez-Millán, José Miguel Molina, Fernando Nieto, and Juan Antonio Vera. "Anomalous Reverse Zoning of Saponite and Corrensite Caused by Contact Metamorphism And Hydrothermal Alteration of Marly Rocks Associated with Subvolcanic Bodies." Clays and Clay Minerals 51, no. 5 (2003): 543–54. http://dx.doi.org/10.1346/ccmn.2003.0510508.

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Nuzhdaev, I. A., S. N. Rychagov, S. O. Feofilaktov, and D. K. Denisov. "Peculiarities of the Magnetic Field of Geothermal Systems of the Pauzhetsky Area (South Kamchatka)." Вулканология и сейсмология 17, no. 2 (2023): 33–51. http://dx.doi.org/10.31857/s0203030622060049.

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Based on many years of research, maps of magnetic field anomalies ΔTa for large geothermal systems of the Pauzhetsky region of South Kamchatka were constructed. Magnetic fields have both general characteristics and individual features for each research object. In the area of Nizhne-Koshelevsky steam-dominated geothermal field identified a system of linear negative magnetic field anomalies, confined to thermal controlling discontinuous tectonic disturbances. Pauzhetsky geothermal field is characterized by a heterogeneous structure of the anomalous magnetic field ΔTa: NW region is marked by a qu

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Mansurov, Mamoy I., Ulker I. Kerimli, and Azer I. Guseynov. "Conditions of localization and patterns of distribution of gold-poly-metal mineralization of the Dagkesaman deposits (Lesser Caucasus, Azerbaijan)." Journal of Geology, Geography and Geoecology 30, no. 3 (2021): 528–38. http://dx.doi.org/10.15421/112148.

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   We studied the structural-morphological types and mineral composition of ore bodies, stages of ore development and conditions of development of the deposits. The research revealed significant elements of the corresponding conditions of localization of gold-polymetallic mineralization, the most characteristic being albitophyre subvolcanic bodies and steeply-dipping damages related to them. According to the structural-morphologic peculiarities, the ore bodies should be united under three categories: 1) simple vein; 2) complex vein; 3) veinlet-impregnation types. The position

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Kurnio, Hananto, and Ulrich Schwarz Schampera. "STRUCTURAL GEOLOGICAL CONTROL ON THE MINERALIZATION ON TABUAN ISLAND,SEMANGKO BAY, SOUTH SUMATERA, INDONESIA." BULLETIN OF THE MARINE GEOLOGY 23, no. 1 (2016): 18. http://dx.doi.org/10.32693/bomg.23.1.2008.7.

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Mineralization have been discovered on Tabuan Island, Semangko Bay, South Sumatera, Indonesia. Tabuan Island belongs to the Neogene Sunda-Banda magmatic arc system. Tabuan Island is a tectonic horst structure which belongs to the subduction-related, magmatically active Barisan zone along the active continental margin of western Sumatera. Basaltic-andesitic volcanics of the late Oligocene to earliest Miocene Hulusimpang Formation are distributed in a broad zone along and subparallel to the regional Semangko Fault and are hosts for several epithermal-style auriferous deposits. The occurrence of

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Harkovska, Alexandra. "The structure of Mesta volcanic massif. Part I. Structural features of the volcanics in Mesta graben." Geologica Balcanica 23, no. 1 (1993): 35–58. http://dx.doi.org/10.52321/geolbalc.23.1.35.

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Mesta Paleogene volcanic massif (SW Bulgaria) is a complex synsedimentary structure. Its lava rocks form numerous endogenous domes and subvolcanic bodies that are components of two polygonal cauldrons and two linear volcano-tectonic zones. The related pyro- and epiclastics interager laterally with a 1500-2000 m thick terrigenous Upper Eocene-Oligocene section. The volcanics are silicic-rhyodacites and dacites (with very rare transitions to latites). According to Na2O+K2O/SiO2 they are transitional and normal, and according to K2O/SiO2 the rocks belong to the HKCA and SH series. Their structura

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Berzina, A. N., A. P. Berzina, and V. O. Gimon. "The Aksug Porphyry Cu–Mo Ore-Magmatic System (Northeastern Tuva): Sources and Formation of Ore-Bearing Magma." Russian Geology and Geophysics 62, no. 4 (2021): 445–59. http://dx.doi.org/10.2113/rgg20194115.

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Abstract ––Two stages are recognized in the evolution of the Aksug ore-magmatic system (OMS): (1) formation of the Aksug granitoid pluton and (2) emplacement of small ore-bearing intrusions. Intrusive bodies of the two stages are composed of rocks of the same type and bear copper mineralization: poor dispersed and large-scale veinlet-disseminated, respectively. The pluton and small intrusions are formed by gabbroid and granitoid rocks, with similar petrogeochemical characteristics of igneous rocks of the same type. The plutonic gabbroic association includes gabbro, gabbrodiorites, and pyroxene

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Sklyarov, Eugene V., Andrey V. Lavrenchuk, Anna G. Doroshkevich, Anastasia E. Starikova, and Sergei V. Kanakin. "Pyroxenite as a Product of Mafic-Carbonate Melt Interaction (Tazheran Massif, West Baikal Area, Russia)." Minerals 11, no. 6 (2021): 654. http://dx.doi.org/10.3390/min11060654.

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Pyroxenite and nepheline-pyroxene rocks coexist with dolomite-bearing calcite marbles in Tazheran Massif in the area of Lake Baikal, Siberia, Russia. Pyroxenites occur in a continuous elongate zone between marbles and beerbachites (metamorphosed gabbro dolerites) and in 5 cm to 20 m fragments among the marbles. Pyroxene in pyroxenite is rich in calcium and alumina (5–12 wt% Al2O3) and has a fassaite composition. The Tazheran pyroxenite may originate from a mafic subvolcanic source indicated by the presence of remnant dolerite found in one pyroxenite body. This origin can be explained in terms

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Nurzhanov, Galym Zh, Vladimir V. Kuznetsov, Pavel A. Nicenko, Nelly G. Kudryavtseva, Tatiana P. Kuznetsova, and Mergen M. Murzagulov. "Geological features and genesis of the Dyusembay Central (Sayakhat) ore deposit." Ores and metals, no. 4 (January 11, 2023): 79–101. http://dx.doi.org/10.47765/0869-5997-2022-10023.

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The article considers the geological features and ore composition of the Dyusembay Central (Sayakhat) leadzinc deposit in the Karsakpai metallogenic complex in the Central Kazakhstan. Historically, the complex was considered industrially significant in terms of iron ores, rather than of lead, zinc, and copper. It is shown that the ore deposit is composed of tuffaceous, silty-sandstone, carbonaceous-terrigenous (ore-hosting), terrigenous, and volcanogenic rocks assigned to the lower subformation of the Zhilandysai Formation of the Upper Proterozoic. The subvolcanic rocks identified and outlined

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Bayaraa, Tamir, Dorjgotov Dangindorj, and Lkhagvatseren B. "Geology and ore composition studies of Dulaan khar uul poly metal deposit." Геологийн асуудлууд 16 (February 23, 2023): 76–83. http://dx.doi.org/10.22353/.v16i1.2261.

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Dulaan khar uul deposit is situated in the NW of the Deluun-Sagsay metallogenic zone, identified within Devonian rift-like structure of Western Mongolia. As for geologic settings, it consists of Devonian Baast uul, Otog formation bimodal volcanic, sedimentary, tufogenic rock units and spatially and genetically interrelated subvolcanic units. The poly metal mineralization develops lenses, layers and vein-like bodies within NE-SW-directed quartz-sericite metasomatite zones extending 700m in length and 300m in width. As a result of geological survey there are identified totally five ore bodies an

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Prytchin, M. E., E. I. Soroka, and V. N. Puchkov. "Novel U-Pb isotopic zircon data on the rhyolite of the Saf’yanovskoe Cu-Zn deposit (Middle Urals)." LITHOSPHERE (Russia) 21, no. 6 (2021): 884–93. http://dx.doi.org/10.24930/1681-9004-2021-21-6-884-893.

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Research subject. Zircons from the Saf’yanovskoe Cu-Zn deposit rhyolite (Middle Urals). For the first time, zircon U-Pb dating for the rhyolite of the ore-bearing volcanic-sedimentary rocks of the Saf’yanovskoe deposit was performed. The volcanites are characterized by an andesite-rhyodacite composition and are localized at the southern edge of the Rezhevskaya structural-formation zone (SFZ) of the Eastern Ural megazone. A number of publications assign these rocks either to the basalt-rhyolite formation of the Middle Devonian, or to the basalt-andesite-dacite-rhyolite formation of the Lower-Mi

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Lotfi, Mohammad, Mansoureh Shirnavard Shirazi, Nima Nezafati, and Arash Gourabjeripour. "MINERALOGY AND GEOCHEMISTRY STUDY OF REE MINERALS IN HOST ROCKS IN IIC IRON DEPOSIT, BAFGH MINERAL AREA, CENTRAL IRAN." Geosaberes 11 (January 8, 2020): 51. http://dx.doi.org/10.26895/geosaberes.v11i0.909.

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The IIC deposit area to the east of the Bafq region exposes rocks that comprise the part of the Central Iran continental terrane. The IIC deposit iron orebodies are magmatic-related hydrothermal deposits that, when considered collectively display a vertical zonation from high-temperature, magmatic ± hydrothermal deposits emplaced at moderate depths (~1–2 km) to magnetite-dominant IOCG deposits emplaced at an even shallower subvolcanic level. The shallowest parts of these systems include near-surface, iron oxide-only replacement deposits, surficial epithermal sediment-hosted replacement deposit

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Hübner, Marcel, Christoph Breitkreuz, Alexander Repstock, et al. "Evolution of the Lower Permian Rochlitz volcanic system, Eastern Germany: reconstruction of an intra-continental supereruption." International Journal of Earth Sciences 110, no. 6 (2021): 1995–2020. http://dx.doi.org/10.1007/s00531-021-02053-5.

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AbstractExtensional tectonics in the Late Paleozoic Central Europe was accompanied by rift magmatism that triggered voluminous intracontinental caldera-forming eruptions. Among these, the Lower Permian Rochlitz Volcanic System (RVS) in the North Saxon Volcanic Complex (Eastern Germany, Saxony) represents a supereruption (VEI 8, estimated volume of 1056 km3) of monotonous rhyolites followed by monotonous intermediates. Mapping, petrography, whole-rock geochemistry along with mineral chemistry and oxygen isotopes in zircon display its complex eruption history and magma evolution. Crystal-rich (&

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Holford, Simon P., Nick Schofield, and Peter Reynolds. "Subsurface fluid flow focused by buried volcanoes in sedimentary basins: Evidence from 3D seismic data, Bass Basin, offshore southeastern Australia." Interpretation 5, no. 3 (2017): SK39—SK50. http://dx.doi.org/10.1190/int-2016-0205.1.

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There is growing evidence that intrusive magmatic bodies such as sills and dikes can influence the migration of fluids in the deep subsurface. This influence is largely due to permeability contrasts with surrounding sedimentary rocks or because of interconnected open fractures within and around intrusions acting as conduits for migrating fluids. The role of buried volcanoes in influencing crossstratal fluid migration in sedimentary basins is less well-established. However, several studies have highlighted spatial linkages between extinct hydrothermal vent complexes and fluid seepage, suggestin

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Harkovska, Alexandra, Zoltán Pécskay, and Mitko Popov. "The Kraishte magmato-tectonic zone (Western Bulgaria) — a review." Geologica Balcanica 34, no. 3-4 (2004): 3–19. http://dx.doi.org/10.52321/geolbalc.34.3-4.3.

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The Kraishte magmato-tectonic zone (KMTZ) is the northernmost of the four Nw-SE trending Paleogene linear magmato-tectonic zones cropping out in Western Bulgaria and referred, as second order structures, to the collision-related first order Macedonian-Rhodope-North Aegean magmatic zone (MRNAMZ). The Kraishte volcanics (KV) are quite uniform dacites to rhyodacites of the calc-alkaline series. They were cooled at a shallow subvolcanic level and are affected irregularly by a low temperature hydrothermal alteration. Most of the KV bodies are conformable and concordant because their morphology is c

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Maliutin, S. A. "LATE PALEOZOIC ALKALI-GRANITOID MAGMATISM OF SOUTHERN KAZAKHSTAN AND ITS ROLE IN THE FORMATION OF THE ORE-BEARING VOLCANIC STRUCTURES OF KENDYCTAS-CHU-ILI-BETPAK-DALA URANIUM ORE PROVINCE." Proceedings of higher educational establishments. Geology and Exploration, no. 3 (June 25, 2018): 33–42. http://dx.doi.org/10.32454/0016-7762-2018-3-33-42.

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Areas of distribution of alkaline granitoids in southernKazakhstanhave been identified, most of which are located within the Kendyktas-Chu-Ili-Betpakdalin uranium-bearing province, traditionally considered as Late Devonian-early Carboniferous. Arguments in favor of late Paleozoic age of alkaline rocks have been given. The proximity of the petrographic composition, petrochemical and geochemical features of the alkaline granites of the Chu-Ili-West-Balkhash area and late Paleozoic alkaline granites of the Zailiysky area has been established, confirming their age and continental rift origin. Simi

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Majcin, Dušan, Dušan Bilčík, Roman Kutas, Petra Hlavňová, Vladimír Bezák, and Ľudovít Kucharič. "Regional and local phenomena influencing the thermal state in the Flysch belt of the northeastern part of Slovakia." Contributions to Geophysics and Geodesy 44, no. 4 (2014): 271–92. http://dx.doi.org/10.1515/congeo-2015-0006.

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Abstract The locality of the northeastern most part of Slovakian Flysch belt belongs to interesting areas in terms of the interpretation of geothermal conditions in mutual relation with the lithosphere structure and their tectonic development. The evaluation of the geothermal energy sources parameters of this locality is likewise worthwhile. The region under study has the centre in position of the borehole Zboj ZB-1 and spreads out Slovakia also in Poland and Ukraine. Our contribution provides the analyses of existing geothermal data enhanced by the construction of temperature field models cor

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Nekrasov, Е. М. "Principles governing the selection of ore regions for gold deposit search." Proceedings of higher educational establishments. Geology and Exploration 63, no. 6 (2022): 77–86. http://dx.doi.org/10.32454/0016-7762-2020-63-6-77-86.

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Background. In 2020, the Auditing Chamber of the Russian Federation, based on a representative report by its expert analysts M. Men’ and A. Kaulbars, proposed expanding the search for deposits of a number of metals, including gold. Since the fund of easily discovered gold deposits coming to the surface has been significantly reduced, prospecting of ore regions most promising in terms of gold deposits becomes highly relevant.Aim. In connection with the above task, it seems expedient to outline territories within the currently known gold provinces, where the prerequisites and signs of gold ores

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Malyutin, S. A. "Western flanks of the Central Asian late paleozoic continental rift system and uranium mineralization." Proceedings of higher educational establishments. Geology and Exploration, no. 1 (June 22, 2022): 17–29. http://dx.doi.org/10.32454/0016-7762-2022-64-1-17-29.

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Introduction. Available information on the occurrences of high alkaline magmatic rocks fixing the position of the western flanks of the southern branches (Gobi Altai and Gobi Tien-Shan) of the Central Asian Late Paleozoic continental rift system in the territory of the North-West of Chingiz (the eastern part of Central Kazakhstan), the Kendyktas-Chu-Ili-Bet-Pak-Dal uranium-bearing province of the Southern Kazakhstan and the Chatkal-Naryn zone of Tien-Shan (Uzbekistan) is reviewed. Data on the confinement of uranium mineralization to these occurrences and its paragenetic relationship with the L

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ΜΕΛΦΟΣ, Β., Π. ΒΟΥΔΟΥΡΗΣ, Κ. ΑΡΙΚΑΣ, and Μ. ΒΑΒΕΛΙΔΗΣ. "Rhenium - rich molybdenites in Thracian porphyry Mo±Cu occurrences, NE - Greece." Bulletin of the Geological Society of Greece 34, no. 3 (2001): 1015. http://dx.doi.org/10.12681/bgsg.17139.

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The present study correlates both the mineralogy of the hydrothermal alteration and the mineral chemistry of molybdenites from three porphyry Mo ± Cu occurrences in Thrace: Melitena, Pagoni Rachi/Kirki and Ktismata/ Maronia. The mineralisations are genetically related to calcalkaline, subvolcanic bodies of Tertiary age. According to their mineralogical and chemical composition the host rocks are characterized as dacite (Melitena), dacitic andésite (Pagoni Rachi) and porphyry microgranite (Ktismata/Maronia). The molybdenites occur in disseminated form, as fracture fillings, as well within quart

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Mortensen, J. K. "Geology and U–Pb geochronology of the Klondike District, west-central Yukon Territory." Canadian Journal of Earth Sciences 27, no. 7 (1990): 903–14. http://dx.doi.org/10.1139/e90-093.

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Geological mapping and U–Pb geochronology of the Klondike District provide new information on the nature and evolution of the Yukon–Tanana terrane (YTT) in western Yukon. The area is underlain by a sequence of thrust panels of regional extent. A continuously mappable sequence of interlayered metasedimentary and metavolcanic rocks is intruded by a variety of deformed metaplutonic rocks within two of these thrust sheets. Layering in the metasediments and metavolcanics is considered to be at least in part transposed stratigraphy. Small bodies of greenstone and altered ultramafic rocks thought to

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Breitkreuz, Christoph, Alexandra Käßner, Marion Tichomirowa, Manuel Lapp, Shan Huang, and Klaus Stanek. "The Late Carboniferous deeply eroded Tharandt Forest caldera–Niederbobritzsch granite complex: a post-Variscan long-lived magmatic system in central Europe." International Journal of Earth Sciences 110, no. 4 (2021): 1265–92. http://dx.doi.org/10.1007/s00531-021-02015-x.

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AbstractSamples and documentation of outcrops and drillings, facies analysis, whole rock geochemistry and radiometric ages have been employed to re-evaluate the Late Carboniferous Tharandt Forest caldera (TFC) and the co-genetic Niederbobritzsch granite (NBG) in the eastern Erzgebirge near Dresden, Germany. The c. 52 km2 TFC harbours strongly welded ignimbrites with a preserved minimum thickness of 550 m. Composition of initial fallout tephra at the base of the TFC fill, comprising lithics of rhyolitic and basic lava, and of silica-rich pyroclastic rocks, suggests a bimodal volcanic activity i

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Sukach, V., L. Riazantseva, V. Somka, and S. Bondarenko. "Molybdenum mineralization of Serhiivka Au-Mo deposit (Middle Dnipro, Ukrainian Shield)." Мінеральні ресурси України, no. 1 (June 3, 2020): 3–11. http://dx.doi.org/10.31996/mru.2020.1.3-11.

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The article is devoted to molybdenum mineralization of the Eastern flank of Au-Mo Serhiivka deposit, located in the Middle Dnipro megablock of the Ukrainian Shield (USh). The generalized description of mineralization is performed on such important questions: discovery and exploration history, structure and composition of the host rocks, metamorphic and metasomatic alteration of rocks, structural position and localization conditions of molybdenum mineralization, ore composition, description of major ore minerals, morphology of mineralization and the most widespread views about its genesis. Moly

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48

Njonfang, E., and C. Moreau. "The mafic mineralogy of the Pandé massif, Tikar plain, Cameroon: implications for a peralkaline affinity and emplacement from highly evolved alkaline magma." Mineralogical Magazine 64, no. 3 (2000): 525–37. http://dx.doi.org/10.1180/002646100549409.

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AbstractThe Pandé massif is a small (4.9×63.4 km) subvolcanic complex of the Cameroon Line striking W – E and intrudes a Panafrican granite basement. It comprises a syenite-granite suite, where coarse- to finegrained syenites are predominant and the granites are the product of residual melt after syenite crystallization, and two volcanic (trachyte-rhyolite and trachyte) sequences. Amphibole and pyroxene are the dominant mafic silicates, the first occurring mainly in rhyolites and coarse- to medium-grained syenites, and the second, principally in all syenites, trachytes and granites. Rare bioti

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CHERVYAKOVSKIY, Vasiliy Stanislavovich, Evgeniy Aleksandrovich SLOBODCHIKOV, Mariya Vladimirovna CHERVYAKOVSKAYA, Nadezhda Nikolaevna FARRAKHOVA, and Elena Nikolaevna VOLCHEK. "Geochemical characteristic of rocks and isotope dating of zircon from the andesite dyke of the rudyanskaya sequence (D2 rd) of the Middle Urals Eastern zone." NEWS of the Ural State Mining University, no. 4 (December 15, 2023): 69–80. http://dx.doi.org/10.21440/2307-2091-2023-4-69-80.

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Relevance. In the basin of the r. Pishma subvolcanic formations, localized in the fields of spreading of the Middle Devonian Rudyanskaya sequence, are presented by different on composition small bodies, sills and dykes, forming with volcanogenic rocks of the Rudyanskaya sequence a basalt-andesite-rhyolite complex, the formation of which is associated with volcanic activity, that took place in Middle Devonian in the environments close to the modern island arcs. Their isotope dating and geochemical characteristic are rather relevant for specification of the composition, volume and paleogeodynami

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Tornos, Fernando, Francisco Velasco, and John M. Hanchar. "The Magmatic to Magmatic-Hydrothermal Evolution of the El Laco Deposit (Chile) and Its Implications for the Genesis of Magnetite-Apatite Deposits." Economic Geology 112, no. 7 (2017): 1595–628. http://dx.doi.org/10.5382/econgeo.2017.4523.

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Abstract The geology and geochemistry of the El Laco iron oxide deposit (Central Andes, Chile) support a genesis related to the ascent, degassing, and subvolcanic emplacement of an unusual oxidized silica-poor but water-and iron-rich melt that took place during the growth of the host Pliocene-Holocene andesitic volcano. The model proposed in this paper for the evolution of the deposit involves the formation of a shallow telescoped magmatichydrothermal system with complex melt-fluid unmixing in a vertical column of less than 1 km. The dominant mineralization occurs as large stratabound apatite-

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