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Journal articles on the topic 'Magmatic sources'

Author: Grafiati

Published: 11 December 2022

Last updated: 31 July 2025

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1

Arnórsson, S. "CO2 from Magmatic Sources in Iceland." Mineralogical Magazine 58A, no. 1 (1994): 27–28. http://dx.doi.org/10.1180/minmag.1994.58a.1.17.

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Chugaev, A. V. "Orogenic Gold Deposits of Northern Transbaikalia, Russia: Geology, Age, Sources, and Genesis." Geochemistry International 62, no. 9 (2024): 909–78. http://dx.doi.org/10.1134/s0016702924700484.

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Abstract The paper presents newly obtained and summarizes preexisting data of long-term geochronological and isotope studies of orogenic mesothermal gold deposits in the world’s largest Lena metallogenic province and reviews interpretations of their genesis. Geochronologic data indicate that the gold mineralization was formed during three ore-forming Paleozoic events. The early Late Ordovician–Early Silurian (450–430 Ma) event produced the abundant veinlet—disseminated gold–sulfide mineralization in Neoproterozoic carbonaceous terrigenous–carbonate rocks of the Baikal–Patom foldbelt (BPB). The

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3

Ashwal, Lewis D., Madelein Patzelt, Mark D. Schmitz, and Kevin Burke. "Isotopic evidence for a lithospheric origin of alkaline rocks and carbonatites: an example from southern Africa." Canadian Journal of Earth Sciences 53, no. 11 (2016): 1216–26. http://dx.doi.org/10.1139/cjes-2015-0145.

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Alkaline rocks and carbonatites, including nepheline syenites, are well established as mantle-derived magmatic products, but the nature and location of their mantle sources is debated. Some workers have used isotopic compositions to infer mixed mantle plume type sources such as EM1, HIMU, and FOZO, implying derivation from the subcontinental asthenosphere. Other models favour an entirely lithospheric source, whereby the magmas, originally formed during intracontinental rifting, became deformed and subducted into the mantle lithosphere during later continental collisions, and constituted part o

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Chugaev, А. V. "Orogenic gold deposits of the Northern Transbaikalia (Russia): geology, age, sources and genesis." Geohimiâ 69, no. 9 (2024): 752–830. https://doi.org/10.31857/s0016752524090015.

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The results of long-term geochronological and isotope-geochemical studies of mesothermal gold deposits of orogenic type in the world’s largest Lena metallogenic province are summarized, and the evaluation of existing conceptions of their genesis is given. On the basis of geochronological data the presence of three ore-forming events manifested in the region in the Paleozoic time is proved. The early Late Ordovician-Early Silurian (450-430 Ma) event is associated with large-scale vein-embedded gold-sulfide mineralization in Neoproterozoic carbonaceous terrigenous-carbonate rocks of the Baikal-P

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Chiaradia, Massimo, Lluís Fontboté, and Agustín Paladines. "Metal Sources in Mineral Deposits and Crustal Rocks of Ecuador (1° N–4° S): A Lead Isotope Synthesis." Economic Geology 99, no. 6 (2004): 1085–106. http://dx.doi.org/10.2113/econgeo.99.6.1085.

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Abstract Ecuador consists of terranes having both continental (Chaucha, Tahuin, Loja terranes) and oceanic (Macuchi, Alao, Salado terranes) affinity, which were accreted to the Amazon craton from Late Jurassic to Eocene. Four main magmatic arcs were formed by the subduction of the Farallon/Nazca plate since the Jurassic: a Jurassic continental arc on the western margin of the Amazon craton, a Jurassic island arc (Alao terrane), an early Tertiary island arc (Macuchi terrane), and a middle-late Tertiary continental arc encompassing the terranes of Macuchi, Chaucha, Tahuin, Loja, and Alao after c

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Georgiev, Svetoslav. "Hafnium isotopes in zircons track the changing sources for the Late Cretaceous magmatism in Eastern Srednogorie, Bulgaria." Review of the Bulgarian Geological Society 82, no. 3 (2021): 274–76. http://dx.doi.org/10.52215/rev.bgs.2021.82.3.274.

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We present new Hf isotopic data of magmatic zircons from the Eastern Srednogorie zone. The data outline two clear temporal trends: rising initial εHf from the initiation of the magmatism at ~95 Ma to 81 Ma, followed by a rapid decline in the initial εHf in the 81–78 Ma time period. The first trend highlights the increasing participation of mantle melts in the formation of magmatic products in the East Balkan and Strandzha regions, which is likely dictated by the southward retreat of the subducting slab. This trend is also evident in published Hf isotopic data on zircons from Central Srednogori

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Zhu, Bin, Hongfu Zhang, M. Santosh, et al. "Iron Isotopes Constrain the Metal Sources of Skarn Deposits: A Case Study from the Han-Xing Fe Deposit, China." Minerals 10, no. 11 (2020): 951. http://dx.doi.org/10.3390/min10110951.

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Magmatic fluids and leaching of rocks are regarded as the two sources of magmatic hydrothermal deposits, but their relative contributions to the metals in the deposits are still unclear. In this study, we combine major elements and Fe isotopes in two sets of rocks from the Han-Xing iron skarn deposit in China to constrain the iron sources. The positive correlation between the δ56Fe and ∑Fe2O3/TiO2 of altered diorites (∑Fe2O3 refers to the total iron) demonstrates that heavy Fe isotopes are preferentially leached from diorites during hydrothermal alteration. However, except for the pyrite, all

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BITENCOURT, MARIA DE FÁTIMA, EVERTON MARQUES BONGIOLO, RUY PAULO PHILIPP, et al. "Estratigrafia do Batólito Florianópolis, Cinturão Dom Feliciano, na Região de Garopaba-Paulo Lopes, SC." Pesquisas em Geociências 35, no. 1 (2008): 109. http://dx.doi.org/10.22456/1807-9806.17898.

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In southern Brazil, the Florianopolis Batholith results from prolonged, mainly granitic magmatism, as part of the Neoproterozoic Dom Feliciano Belt. Plutonic associations in this belt are related to transpressive tectonism (650-580 Ma) in post-collisional setting, where the translithospheric discontinuities of the Southern Brazilian Shear Belt have triggered magmatism, acting as channels for melts originated in deep crustal or mantle sources. In the region of Garopaba-Paulo Lopes, a fraction of this magmatism was studied, resulting in a formal proposition for its stratigraphic organization in

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Mendonça, Carlos Alberto, William Pareshi Soares, and Felipe Lisbona Cavalcante. "Annihilator transform for magnetic lineaments removal in dike swarms." GEOPHYSICS 84, no. 4 (2019): J31—J41. http://dx.doi.org/10.1190/geo2018-0308.1.

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Dike swarms are igneous structures of continental expression accounting for major episodes of magmatism in igneous provinces, mantle plume heads, and continental breakup. In regional magnetic maps, dike swarms are recognized by high-amplitude lineaments indicative of lengthy and juxtaposed magnetized bodies. High-anomaly amplitudes from such tabular (2D) bodies tend to obscure lower amplitude contributions from localized 3D sources, representative of magmatic structures that once served as magma plumbing and storage. The recognition of such subtle signals with conventional filtering techniques

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Sakhno, V. G., and L. S. Tsurikova. "Isotopic and geochemical features of the genesis of igneous complexes and ore-magmatic systems in the Chukotka sector of the Russian Arctic coast." LITHOSPHERE (Russia) 20, no. 2 (2020): 196–211. http://dx.doi.org/10.24930/1681-9004-2020-20-2-196-211.

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Research subject. The isotopic composition (Pb-Pb, Sm-Nd, Rb-Sr, Os/Os, Hf/Hf, 3 He/4 He, etc.) of magmatic complexes and ore-magmatic systems (OMS) of two ore clusters (Kupolsky and Ilirneysky) located in the subpolar Western Chukotka was studied. These ore clusters differ from each other both in their structural position and the age of their magmatic complexes, within which the largest deposits of Au-Ag type are known. Materials and methods. The Pb-Pb, Rb-Sr, SmNd, Re-Os, Lu-Hf, 3 He/4 He, 40Ar/36Ar and sulphur isotopic systems were studied at the VSEGEI centre for isotopic studies (St. Pete

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Augland, Lars Eivind, Abdelali Moukhsil, Fabien Solgadi, and Aphrodite Indares. "Pinwarian to Grenvillian magmatic evolution in the central Grenville Province: new constraints from ID–TIMS U–Pb ages and coupled Lu–Hf S–MC–ICP–MS data." Canadian Journal of Earth Sciences 52, no. 9 (2015): 701–21. http://dx.doi.org/10.1139/cjes-2014-0232.

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Understanding the magmatic evolution of the rocks once comprising the hinterland of the Grenville Orogen through their Mesoproterozoic formation is a key to understanding the Grenvillian Orogeny as a whole. In this contribution, we present high-precision isotope dilution thermal ionization mass spectrometry (ID–TIMS) U–Pb and coupled solution multicollector inductively coupled plasma mass spectrometry (S–MC–ICP–MS) Lu–Hf zircon data from magmatic rocks occurring in the allochthonous belt of the Grenville Orogen in the central part of the Grenville Province. We document the presence of a large

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Gromalova, Natalya. "IGNEOUS ZIRCON AS AN INDICATOR OF CRYSTALLIZATION ENVIRONMENT AND PARENT MELT SOURCES." LIFE OF THE EARTH 44, no. 2 (2022): 150–66. http://dx.doi.org/10.29003/m3024.0514-7468.2022_44_2/150-166.

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This review summarizes the information on the crystallomorphological features of zircon from magmatic rocks, its internal structure, the chemistry of the crystalline matrices, the composition of inclusions, and the distribution of rare-earth elements. These data allow us to reveal the discriminant features of zircon that crystallized from magmatic melts in various geodynamic settings and to distinguish crustal and mantle sources of melts. An integrated study of the above zircons may be used to determine the PT conditions of magmatic rock formation. The concentration of separate elements in zir

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13

Kaneoka, Ichiro. "Noble gas signatures of magmatic sources and processes." GEOCHEMICAL JOURNAL 27, no. 4/5 (1993): 201–11. http://dx.doi.org/10.2343/geochemj.27.201.

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Markovic, Sava, Manuel Brunner, Lukas Müller, et al. "Zircon Petrochronology of Au-Rich Porphyry and Epithermal Deposits in the Golden Quadrilateral (Apuseni Mountains, Romania)." Economic Geology 119, no. 4 (2024): 967–88. http://dx.doi.org/10.5382/econgeo.5073.

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Abstract The Golden Quadrilateral of the Apuseni Mountains (Romania) represents the richest Au(-Cu-Te) porphyry and epithermal district of Europe and the Western Tethyan metallogenic belt. The Au(-Cu-Te) mineralization is associated with Neogene calc-alkaline magmatism along graben structures growing during the late stages of the Alpine-Carpathian orogeny. We use zircon petrochronology to study the time-space distribution, sources, composition, and timescales of the Au(-Cu-Te)-mineralizing magmatism and explore its link to regional tectonics. Our own and published U-Pb zircon ages document ore

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15

Zhou, Xiong, Yu Zhou, and Yi Zhang. "Further Studies of Ore-Forming Fluid Sources of Bangpu Molybdenum-Copper Polymetallic Deposit, Tibet." Advanced Materials Research 746 (August 2013): 473–77. http://dx.doi.org/10.4028/www.scientific.net/amr.746.473.

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Bangpu molybdenum-copper polymetallic deposit is located in the eastern section of the Gangdese Porphyry Copper Belt of Tibet. It is a typical large porphyry molybdenum copper polymetallic deposit. The isotope study of fluid inclusions H and O in the quartz (calcite) of various mineralization stages shows that, the ore-forming fluid comes mainly from meteoric hydrothermal caused by atmospheric precipitation, which has consistency with ore-forming fluid sources of Gangdese Porphyry Copper Belt. The Mo-Cu phase with low δD value (-140.5 ~ -104.0 ) suggests a large-scale magmatic degassing. The a

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Wang, Tianrui, Huijuan Peng, Ying Xia, Yue Chen, Dongjie Yang, and Qi Zhou. "Magmatic Processes of Granitoids in the Hongniu-Hongshan Porphyry-Skarn Copper Deposit, Southern Yidun Terrane, China: Evidence from Mineral Geochemistry." Minerals 12, no. 12 (2022): 1559. http://dx.doi.org/10.3390/min12121559.

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The Hongniu-Hongshan porphyry-skarn deposit is located in the southern Yidun terrane in the Sanjiang Tethyan Metallogenic Domain (STMD). Although its metallogenesis has been well constrained in the past decade, the magmatic processes for granitoids in the Hongniu-Hongshan deposit are still poorly understood. Herein, we provide new geochemical data on magmatic minerals (plagioclase, amphibole, and clinopyroxene) in the Hongniu-Hongshan granitoids to get a better insight into these processes. The complex zoning patterns of plagioclase phenocrysts indicate magma recharge and mixing. Physiochemica

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Solis Alulima, Byron, Jacobo Abati Gómez, Alicia López Carmona, Gabriel Gutiérrez Alonso, and Javier Fernández Suárez. "Geochronology and detrital zircons sources from the Sierra Albarrana Domain (SW Iberian Massif)." Geogaceta 73 (June 5, 2023): 71–74. http://dx.doi.org/10.55407/geogaceta95417.

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This study compiles the U-Pb and 40Ar/39Ar geochronology of the metasedimentary, migmatitic and granitic rocks of the Sierra Albarrana Domain, based on data recently published by the authors together with other bibliographic sources. Maximum depositional ages (MDA) and magmatic and metamorphic events ages are discussed. MDAs suggest that this domain was deposited during the middle Cambrian (ca. 511) and U-Pb ages of zoned magmatic and metamorphic zircon grains indicate that the main tectono-magmatic event is late Cambrian (granite emplacement; 481 ± 2 Ma) to early Ordovician (migmatization; 47

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18

Rudnev, S. N., O. M. Turkina, V. G. Mal’kovets, E. A. Belousova, P. A. Serov, and V. Yu Kiseleva. "Intrusive Complexes of the Late Neoproterozoic Island Arc Structure of the Lake Zone (Mongolia): Isotope Systematics and Sources of Melts." Russian Geology and Geophysics 63, no. 1 (2022): 23–38. http://dx.doi.org/10.2113/rgg20204252.

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Abstract –We present data on the geochemical and Sr–Nd isotope compositions of rocks and on the Lu–Hf isotope composition of magmatic and xenogenic zircons from granitoids and gabbroids of the late Neoproterozoic island arc structure of the Lake Zone. Plagiogranitoids, gabbroids, and quartz diorites (559–542 Ma) formed at the late Neoproterozoic subduction stage of magmatism, and two-feldspathic granites (~483 Ma) mark Cambrian–Ordovician accretion–collision processes. We have established that the volcanic rocks of the late Neoproterozoic island arc and/or its oceanic base, which formed from t

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MA, Xuxuan, Joseph G. MEERT, Wenrong CAO, et al. "Mantle Driven Early Eocene Magmatic Flare‐up of the Gangdese Arc, Tibet: A Case Study on the Nymo Intrusive Complex." Acta Geologica Sinica - English Edition 98, no. 4 (2024): 878–903. http://dx.doi.org/10.1111/1755-6724.15197.

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AbstractMagmatic periodicity is recognized in continental arcs worldwide, but the mechanism responsible for punctuated arc magmatism is controversial. Continental arcs in the Trans‐Himalayan orogenic system display episodic magmatism and the most voluminous flare‐up in this system was in early Eocene during the transition from subduction to collision. The close association of the flare‐up with collision is intriguing. Our study employs zircon Lu‐Hf and bulk rock Sr‐Nd isotopes, along with mineral geochemistry, to track the melt sources of the Nymo intrusive complex and the role of mantle magma

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Ramacciotti, Carlos D., César Casquet, Edgardo G. Baldo, Pablo H. Alasino, Carmen Galindo, and Juan A. Dahlquist. "Late Cambrian – Early Ordovician magmatism in the Sierra de Pie de Palo, Sierras Pampeanas (Argentina): implications for the early evolution of the proto-Andean margin of Gondwana." Geological Magazine 157, no. 2 (2019): 321–39. http://dx.doi.org/10.1017/s0016756819000748.

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AbstractThe Sierra de Pie de Palo, in the Argentinean Sierras Pampeanas (Andean foreland), consists of a Mesoproterozoic basement and an Ediacaran – upper Cambrian sedimentary cover that underwent folding, thrusting and metamorphism during the Ordovician Famatinian orogeny. Mafic rocks and granitoids of the easternmost Sierra de Pie de Palo provide information about the magmatic activity at the proto-Andean margin of Gondwana during late Cambrian – Early Ordovician time. Magmatic activity began in the Sierra de Pie de Palo as dykes, sills and small intrusions of tholeiitic gabbros between 490

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DINI, A., F. INNOCENTI, S. ROCCHI, S. TONARINI, and D. S. WESTERMAN. "The magmatic evolution of the late Miocene laccolith–pluton–dyke granitic complex of Elba Island, Italy." Geological Magazine 139, no. 3 (2002): 257–79. http://dx.doi.org/10.1017/s0016756802006556.

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Since late Miocene time, post-collisional extension of the internal parts of the Apennine orogenic belt has led to the opening of the Tyrrhenian basin. Extensive, mainly acidic peraluminous magmatism affected the Tuscan Archipelago and the Italian mainland during this time, building up the Tuscan Magmatic Province as the fold belt was progressively thinned, heated and intruded by mafic magmas. An intrusive complex was progressively built on western Elba Island by emplacement, within a stack of nappes, of multiple, shallow-level porphyritic laccoliths, a major pluton, and a final dyke swarm, al

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Han, Jinsheng, Pete Hollings, Fred Jourdan, Yunchuan Zeng, and Huayong Chen. "Inherited Eocene magmatic tourmaline captured by the Miocene Himalayan leucogranites." American Mineralogist 105, no. 9 (2020): 1436–40. http://dx.doi.org/10.2138/am-2020-7608.

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Abstract The Miocene Cuonadong leucogranites in the easternmost section of the Tethyan Himalaya, Southern Tibet, are characterized by two types of tourmaline. Tourmaline occurs as needle-like crystals in the two-mica ± tourmaline granites (Tur G) and large patches in the pegmatites (Tur P). Both the granite and the pegmatites yield Miocene ages (ca. 20 Ma) based on monazite U(-Th)-Pb dating, whereas 40Ar/39Ar geochronology of the coarse-grained tourmalines (Tur P) crosscut by pegmatite veins yielded an Eocene mini-plateau age of 43 ± 6 Ma. Major element concentrations of tourmaline indicate th

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Downes, H., F. Wall, A. Demény, and Cs Szabó. "Continuing the Carbonatite Controversy Preface." Mineralogical Magazine 76, no. 2 (2012): 255–57. http://dx.doi.org/10.1180/minmag.2012.076.2.01.

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Carbonatites have always been controversial (Mitchell, 2005). Their magmatic origin was disputed in the early days of the last century, regardless of the fact that experiments clearly demonstrated the crystallization of magmatic calcite (Wyllie and Tuttle, 1960). The observation of the eruption of natrocarbonatite lava in Oldoinyo Lengai (Dawson 1962) finally convinced petrologists that they were dealing with the products of magmatic carbonate liquids. Since that time, further controversies have emerged, especially regarding the ultimate origin of carbonatite magmas, for which there are two ‘e

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Traversa, Glanbosco, Mario Barbieri, Luigl Beccaluva, et al. "Mantle sources and differentiation of alkaline magmatic suite of Lages, Santa Catarina, Brazil." European Journal of Mineralogy 8, no. 1 (1996): 193–208. http://dx.doi.org/10.1127/ejm/8/1/0193.

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Cecil, M. Robinson, George E. Gehrels, Margaret E. Rusmore, et al. "Mantle control on magmatic flare-ups in the southern Coast Mountains batholith, British Columbia." Geosphere 17, no. 6 (2021): 2027–41. http://dx.doi.org/10.1130/ges02361.1.

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Abstract The southern Coast Mountain batholith was episodically active from Jurassic to Eocene time and experienced four distinct high magmatic flux events during that period. Similar episodicity has been recognized in arcs worldwide, yet the mechanism(s) driving such punctuated magmatic behavior are debated. This study uses zircon Hf and O isotopes, with whole-rock and mineral geochemistry, to track spatiotemporal changes in southern Coast Mountains batholith melt sources and to evaluate models of flare-up behavior and crust formation in Cordilleran arc systems. Zircon Hf isotope analysis yie

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Abd El-Naby, Hamdy H., and Yehia H. Dawood. "The Geochemistry, Petrogenesis, and Rare-Metal Mineralization of the Peralkaline Granites and Related Pegmatites in the Arabian Shield: A Case Study of the Jabal Sayid and Dayheen Ring Complexes, Central Saudi Arabia." Applied Sciences 14, no. 7 (2024): 2814. http://dx.doi.org/10.3390/app14072814.

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The Neoproterozoic period in the Jabal Sayid and Dayheen areas is characterized by three distinct magmatic phases: an early magmatic phase of granodiorite–diorite association, a transitional magmatic phase of monzogranites, and a highly evolved magmatic phase of peralkaline granites and associated pegmatites. The presence of various accessory minerals in the peralkaline granites and pegmatites, such as synchysite, bastnaesite, xenotime, monazite, allanite, pyrochlore, samarskite, and zircon, plays an important role as contributors of REEs, Zr, Y, Nb, Th, and U. The geochemical characteristics

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Comin-Chiaramonti, Piero, Angelo De Min, Aldo Cundari, et al. "Magmatism in the Asunción-Sapucai-Villarrica Graben (Eastern Paraguay) Revisited: Petrological, Geophysical, Geochemical, and Geodynamic Inferences." Journal of Geological Research 2013 (May 16, 2013): 1–22. http://dx.doi.org/10.1155/2013/590835.

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The Asunción-Sapucai-Villarrica graben (ASV) in Eastern Paraguay at the westernmost part of the Paraná Basin was the site of intense magmatic activity in Mesozoic and Tertiary times. Geological, petrological, mineralogical, and geochemical results indicate that the following magmatic events are dominant in the area: (1) tholeiitic basalt and basaltic andesites, flows and sills of low- and high-titanium types; (2) K-alkaline magmatism, where two suites are distinguished, that is, basanite to phonolite and alkali basalt to trachyte and their intrusive analogues; (3) ankaratrite to phonolite with

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Silantyev, S. A., Yu A. Kostitsyn, V. V. Shabykova, et al. "Geodynamic nature of magmatic sources of North-West Pacific: an interpretation data on isotope composition of Sr and Nd in rocks dredged at Stalemate ridge, Ingenstrem depression, and Shirshov Rise." Петрология 27, no. 6 (2019): 715–36. http://dx.doi.org/10.31857/s0869-5903276715-736.

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First data on isotope composition of Sr and Nd in rocks dredged at different areas belong to lithosphere of the NW Pacific are present. All samples examined were obtained from NW termination of Stalemate Ridge (NW Pacific) and Central part of Shirshov Rise (Western Bering Sea). Results of conducted study allow sure enough to judge on geodynamic affinity of the central segment of Shirshov Rise. Mafic-ultramafic rocks dredged here originated due evolution of magmatic melt formed by partial melting of source parental for MORB belongs to mantle wedge perhaps. Thus, this interpretation means that S

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Fedorov, P. I., A. B. Perepelov, D. V. Kovalenko, S. I. Dril, and K. V. Lobanov. "Sources of eocene magmatism of Western Kamchatka (according to geochemical and isotope Sr-Nd-Pb characteristics of basites)." Доклады Академии наук 487, no. 3 (2019): 293–98. http://dx.doi.org/10.31857/s0869-56524873293-298.

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The isotope-geochemical characteristics of the Eocene-Oligocene magmatic rocks of Western Kamchatka were studied. It is shown that the igneous rocks of the Eocene (45-53 Ma) Kinkil complex of Western Kamchatka are characterized by geochemical signs of super-subduction volcanism. Their isotopic composition of Sr, Nd and Pb, low concentrations of HFSE and HREE relative to the composition of MORB, suggest the formation of primary melts from depleted or poorly enriched in isotopic composition of the mantle wedge sources in different contaminated quartz-feldspath sialic sediments. From the end of t

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Parfenov, A. V., V. A. Lebedev, I. V. Chernyshev, et al. "Petrological-geochemical characteristics of lavas, sources and evolution of magmatic melts of the Kazbek neovolcanic center (Greater Caucasus)." Петрология 27, no. 6 (2019): 658–89. http://dx.doi.org/10.31857/s0869-5903276658-689.

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The results of petrological-geochemical and isotope-geochemical studies of the Late Pleistocene-Holocene lavas of the Kazbek Neovolcanic Center, one of the largest centers of youngest magmatism in the Greater Caucasus, are presented. It has been established that the volcanic rocks of the Kazbek center arise a continuous compositional series basaltic (trachy-)andesites(trachy-)andesitesdacites with a predominance of calc-alkaline intermediate and moderately-acid lavas. The obtained results indicate that the processes of fractional crystallization and mixing of melts had a leading role in

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Stupak, F. M., V. V. Yarmolyuk, E. A. Kudryashova, and V. A. Lebedev. "Early Cretaceous Kalakan Magmatic Area (Vitim Region, Northern Transbaikalia): Stages of Formation, Magmatic Sources, and Tectonic Setting." Russian Journal of Pacific Geology 12, no. 6 (2018): 539–48. http://dx.doi.org/10.1134/s181971401806009x.

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Berzina, A. P., V. I. Sotnikov, and M. S. Mel’gunov. "DEEP-SEATED SOURCES OF MAGMATISM OF THE SORSK DEPOSIT." Russian Geology and Geophysics 35, no. 2 (1994): 50–58. https://doi.org/10.2113/rgg.1994.35.2.50.

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The Sorsk essentiaUy molybdenum deposit of copper-molybdenum association is situated in the Uibatsk pluton (East Siberia, Kuznetsk Alatau). The Uibatsk pluton is a derivative of a long-lived and deep-seated source of endogenic activity. It is composed of Uibatsk magmatites of gabbroic, monzonitoid and granite associations (€2–O) hosting stocks and dikes of the Sorsk ore-bearing porphyry complex and post-ore dikes (D). Among the Uibatsk rocks, magmatic series of various tectonic regimes are distinguished: of pre-plate collision, of post-plate collision-uplift, late orogenic and syncollisional.

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Göçmengil, Gönenç, Fatma Gülmez, Zekiye Karacik, and Namık Aysal. "Petrogenesis of Early Cenozoic Sarıcakaya–Nallıhan Volcanism in NW Turkey: Implications for the Geodynamic Setting and Source Characterization of the Balkanatolia Magmatic Realm." Minerals 12, no. 12 (2022): 1572. http://dx.doi.org/10.3390/min12121572.

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Sarıcakaya–Nallıhan Volcanism was generated within the Balkanatolia Magmatic Realm between 48 and 44 Ma (by 40Ar–39Ar age determination) and is represented by three different volcanic units all displaying subduction-related geochemical signatures, such as depletion in HFSE and enrichment in LREE and LILE. The first unit (V1) consists of nepheline-normative, olivine basalts with OIB-like affinity. The second (V2) and third (V3) units are represented by more evolved compositions such as basaltic-andesitic, andesitic, and dacitic-rhyolitic lavas. Even the most basic lavas have elevated Mg# values

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Vieira, Daniel Triboli, Rodrigo Chaves Ramos, Edinei Koester, Cristine Lenz, and Fernando Galvão Klein. "Peraluminous magmatism in the Southernmost Dom Feliciano Belt (Brazil): Magmatic evolution process, sources and tectonic implications." Journal of South American Earth Sciences 106 (March 2021): 103081. http://dx.doi.org/10.1016/j.jsames.2020.103081.

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Potratz, Guilherme Loriato, Mauro Cesar Geraldes, Edgar Batista de Medeiros Júnior, Filipe Altoé Temporim, and Maria Virgínia Alves Martins. "A Juvenile Component in the Pre- and Post-Collisional Magmatism in the Transition Zone between the Araçuaí and Ribeira Orogens (SE Brazil)." Minerals 12, no. 11 (2022): 1378. http://dx.doi.org/10.3390/min12111378.

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The Araçuaí and Ribeira orogens have been studied for decades, and recently, these two orogens were described as the Araçuaí–Ribeira Orogen System. Despite much work investigating this orogenic system, some issues, such as the connection between the two orogens, are still not fully understood. This work aimed to present unpublished Lu-Hf data for the Santa Angélica Intrusive Complex (SAIC) and for the host rocks that are part of the Rio Negro magmatic arc, as well as to present U-Pb ages for these rocks, thus contributing to the understanding of the geological processes that acted in the trans

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Filipov, Petyo. "Mafic adakite-like magmatism at the Cretaceous–Paleogene boundary from the Northwest Rhodopes, Bulgaria." Review of the Bulgarian Geological Society 84, no. 3 (2023): 81–84. http://dx.doi.org/10.52215/rev.bgs.2023.84.3.81.

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New findings of monzogabbro and gabbro-monzodiorite dykes aged 62 Ma reveal the existence of magmatism in the gap between termination of the Late Cretaceous subduction-related and start of the early–middle Eocene post-collisional magmatic stages in the Rhodope Massif. Their geochemical compositions strongly resemble adakitic signature as well as hornblende and epidote geobarometers predicted lower crustal conditions (20–30 km depth) of crystallization. Detailed studies on U-Pb geochronology of zircon populations and Sr-Nd-Hf isotopic compositions point to significant assimilation of the local

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Villaseca, Carlos, and Víctor Herreros. "A sustained felsic magmatic system: the Hercynian granitic batholith of the Spanish Central System." Earth and Environmental Science Transactions of the Royal Society of Edinburgh 91, no. 1-2 (2000): 207–19. http://dx.doi.org/10.1017/s0263593300007380.

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A batholith of around 10,000 km2 was formed during the Hercynian orogeny in the Spanish Central System (SCS). Geochronological data indicate concentrated magmatic activity during the period 325-284 Ma. This late-orogenic magmatism is essentially granitic with only minor associated basic rocks (< 2% in outcrop). The SCS is a remarkably homogeneous batholith showing a restricted range of geochemical granite types without any evolutionary pattern related to time. These peraluminous granites show a limited variation in Na2O/K2O) (0·60-0·95), K/Rb (140-240), (La/Yb)n (6-13), and Eu/Eu* (0·34-0·6

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TONIOLO, JOÃO ANGELO, MARCUS VINICIUS DORNELES REMUS, MOACIR JOSÉ BUENANO MACAMBIRA, and CÂNDIDO AUGUSTO VELOSO MOURA. "Metalogênese do Depósito de Cobre Cerro dos Martins, RS -Revisão e Geoquímica Isotópica de SR, S, O e C-." Pesquisas em Geociências 31, no. 2 (2004): 41. http://dx.doi.org/10.22456/1807-9806.19573.

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This paper presents the geology, chemical data, Pb-Pb zircon ages, sulfur, carbon, oxygen, strontium isotopes and fluid inclusions of Cerro dos Martins copper deposit. The deposit is hosted by the Neoproterozoic volcano-sedimentary sequence of the Camaquã Basin in the Rio Grande do Sul Shield, southern Brazil. The ores consist of a set of Cu-sulfide NW-trending veins and disseminations within of the Bom Jardim Group. Chalcocite and bornite are the main ore minerals, whereas carbonates, barite, quartz and hematite are the gangue. The volcanic host rocks show an alkaline affinity. An intrusive q

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Guzev, Vladislav, Artem Terekhov, Robert Krymsky, Boris Belyatsky, and Anatolii Molchanov. "Morozkinskoye gold deposit (southern Yakutia): age and ore sources." Записки Горного института 252 (December 17, 2021): 801–13. http://dx.doi.org/10.31897/pmi.2021.6.3.

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The paper presents the results of the comprehensive isotope geochemical (Re-Os, Pb and δ34S) study of sulfide mineralization of the Morozkinskoye deposit. The ore zones of the deposit are localized in the syenite massif of Mount Rudnaya, which is located within the Central Aldan ore region (southern Yakutia). Gold mineralization is represented by vein-disseminated or vein type mineralization and is manifested in acidic low-temperature metasomatites – beresites (Qz-Ser-Ank-Py). For the first time we obtained an age estimate of the gold mineralization ~ 129 ± 3 Ma, which the synchronism of the h

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Chugaev, А. V., A. V. Parfenov, V. А. Lebedev, et al. "Sources and evolution of miocene-pleistocene alkaline magmatism in the north-east part of the arabian plate (data from Sr–Nd–Pb isotopic systematics and K–Ar geochronometry)." Геохимия 69, no. 2 (2024): 3–31. http://dx.doi.org/10.31857/s0016752524020014.

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A geochronological and isotope-geochemical study of alkaline basalts from three areas of young magmatism within the northeastern part of the Arabian Plate (Southeastern Turkey), Batman, Kurtalan and Alemdağ, was carried out. The obtained isotope data have indicated that the volcanism in the studied region developed over 5 mln years from the end of Miocene to the mid of Pleistocene during four pulses separated by breaks in magmatic activity: 6.1-4.9 Ma (Batman area, hawaiites), ~3.0 Ma (Alemdağ plateau, phase I, basalts), 2.0-1.9 Ma (Alemdağ plateau, phase II, tephrites), and 1.5-1.3 Ma (Alemda

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Vernikovsky, V. A., A. N. Semenov, O. P. Polyansky, A. V. Babichev, A. E. Vernikovskaya, and N. Yu Matushkin. "Tectonothermal model and magmatism evolution of the postcollisional (pre-plume) development stage of the Kara orogen (Northern Taimyr, Central Arctic)." Доклады Российской академии наук. Науки о Земле 514, no. 1 (2024): 56–64. http://dx.doi.org/10.31857/s2686739724010077.

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We consider a tectonothermal model and the evolution of magmatism during the late Paleozoic postcollisional (pre-plume) development stage of the Kara orogen in northern Taimyr, Central Arctic. The model is based on new and published structural, petrologic, geochemical and geochronological data, as well as thermophysical parameters obtained for the Kara orogen that includes great amounts of syncollisional and postcollisional granites formed due to the collision of the Kara microcontinent and the Siberian craton. Based on geological, geochemical and U–Th–Pb isotope data, the granites have been d

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BARROS, RENATA, AGATHE DEFOURNY, ARNAUD COLLIGNON, et al. "A review of the geology and origin of CO2 in mineral water springs in east Belgium." Geologica Belgica 24, no. 1-2 (2020): 17–31. http://dx.doi.org/10.20341/gb.2020.023.

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Naturally CO2-rich mineral water springs (pouhons) in east Belgium occur in the context of the Rhenohercynian domain of the Variscan fold-and-thrust belt, mostly within the Cambro-Ordovician Stavelot-Venn Massif. The origin of the CO2 is still unclear, although different hypotheses exist. In this review study, we show pouhon waters are of the calcium bicarbonate type (~310 mg/l HCO3- on average), with notable Fe (~15 mg/l) and some Ca (~43 mg/l). Pouhon waters are primarily meteoric waters, as evidenced by H and O isotopic signature. The δ13C of CO2 varies from -7.8 to +0.8‰ and contains up to

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Stupak, F. M., V. V. Yarmolyuk, E. A. Kudryashova, and V. A. Lebedev. "EARLY CRETACEOUS KALAKAN MAGMATIC AREA (VITIM REGION, NORTHERN TRANSBAIKALIA): STAGES OF FORMATION, MAGMATISM SOURCES AND TECTONIC POSITION." Tikhookeanskaya Geologiya 37, no. 6 (2018): 95–106. http://dx.doi.org/10.30911/0207-4028-2018-37-6-95-106.

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ELLIOTT, B. A. "Petrogenesis of the Post-kinematic Magmatism of the Central Finland Granitoid Complex II; Sources and Magmatic Evolution." Journal of Petrology 44, no. 9 (2003): 1681–701. http://dx.doi.org/10.1093/petrology/egg053.

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Barnes, Calvin G., and Melanie A. Barnes. "The western Hayfork terrane: Remnants of the Middle Jurassic arc in the Klamath Mountain province, California and Oregon." Geosphere 16, no. 4 (2020): 1058–81. http://dx.doi.org/10.1130/ges02229.1.

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Abstract Arc magmatism was widespread in the Cordillera of North America during Middle Jurassic time. The predominant representative of this arc magmatism in the Klamath Mountain province is the western Hayfork terrane (WHT). This terrane is primarily metasedimentary, consisting mainly of crystal-lithic arenite, argillitic sediments and lahar deposits, rare lavas, and sparse quartz-rich arenite. Because lavas are rare, petrologic study using bulk-rock compositions is restricted to analysis of cobbles in lahar deposits. Moreover, the WHT underwent greenschist-facies regional metamorphism with c

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Leat, Philip T., and Jane H. Scarrow. "Central volcanoes as sources for the Antarctic Peninsula Volcanic Group." Antarctic Science 6, no. 3 (1994): 365–74. http://dx.doi.org/10.1017/s0954102094000568.

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From at least the Early Jurassic to the Miocene, eastward subduction of oceanic crust took place beneath the Antarctic Peninsula. Magmatism associated with the subduction generated a N-S linear belt of volcanic rocks known as the Antarctic Peninsula Volcanic Group (APVG), and which erosion has now exposed at about the plutonic/volcanic interface. Large central volcanoes from the APVG are described here for the first time. The structures are situated in north-west Palmer Land within the main Mesozoic magmatic arc. One centre, Zonda Towers, is recognized by the presence of a 160 m thick silicic

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Alekseev, Viktor. "Tectonic and magmatic factors of Li-F granites localization of the East of Russia." Journal of Mining Institute 248 (May 25, 2021): 173–79. http://dx.doi.org/10.31897/pmi.2021.2.1.

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We have investigated tectonic and magmatic factors of Li-F granites localization of the East of Russia. The study is based on the ideas of Far Eastern geologists about the deep structures of intraplate activity. A model of a source structure with mantle heat sources and ore-forming magmatic complexes was used. We carried out a special metallogenic analysis of the East of Russia as applied to the rare metal-tin-bearing formation of subalkaline leucogranites, including Li-F ones. Source structures are the main factor in the tectonic and magmatic development of the East of Russia, localizat

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Jackson, Lily J., Brian K. Horton, and Cristian Vallejo. "Detrital zircon U-Pb geochronology of modern Andean rivers in Ecuador: Fingerprinting tectonic provinces and assessing downstream propagation of provenance signals." Geosphere 15, no. 6 (2019): 1943–57. http://dx.doi.org/10.1130/ges02126.1.

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Abstract Recognizing detrital contributions from sediment source regions is fundamental to provenance studies of active and ancient orogenic settings. Detrital zircon U-Pb geochronology of unconsolidated sands from modern rivers that have source catchments with contrasting bedrock signatures provides insight into the fidelity of U-Pb age signatures in discriminating tectonic provenance and downstream propagation of environmental signals. We present 1705 new detrital zircon U-Pb ages for 15 samples of unconsolidated river sands from 12 modern rivers over a large spatial extent of Ecuador (∼1°N–

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Yutkina, E. V., A. V. Kargin, A. A. Nosova, O. F. Kuzmenkova, L. V. Sazonova, and I. A. Kondrashov. "PALEOZOIC INTRAPLATE MAGMATISM OF THE EAST EUROPEAN PLATFORM: COMPARATIVE ANALYSIS OF THE PRIPYAT-DNIEPER-DONETS RIFT ZONE AND THE KOLA-ARKHANGELSK PROVINCE." Geodynamics & Tectonophysics 15, no. 5 (2024): 0788. http://dx.doi.org/10.5800/gt-2024-15-5-0788.

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This paper presents a comparative analysis of geochronological, geochemical, Sr-Nd isotopic data and geodynamic conditions for the Devonian magmatism of the East European Platform, using as an example the Pripyat-Dnieper-Donets rift zone in the south of the platform and the Kola alkaline province in the north.The Late Paleozoic rifting in the south of the platform was accompanied by magmatism, which formed a wide range of rocks, from alkaline-ultramafic lamprophyres and orangeites, non-diamondiferous kimberlites and carbonatites to typical tholeiites, trachyandesites, and trachyrhyodacites. Ac

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Abramov, B. N. "Peculiarities of the distribution of rare-earth elements in the ores of some gold deposits of Eastern Transbaikalia." Proceedings of higher educational establishments. Geology and Exploration, no. 5 (November 2, 2018): 48–58. http://dx.doi.org/10.32454/0016-7762-2018-5-48-58.

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The distribution of rare-earth elements (REE) in ores of gold deposits of East Transbaikalia has shown that the ore-bearing magma chambers have different depths and degrees of differentiation. The greatest degree of differentiation was within the magmatic foci (Eu/Eu* — 0,29—0,32; Rb/Sr — 0,98—1,40), which are the sources of gold-quartz-arsenopyrite ores, the magmatic sources of the gold-quartz and gold-sulfide-quartz ores (Eu/Eu* — 0,53—0,72; Rb/Sr of 0,10 to 0,54) had lesser degree of differentiation. Magma chambers that are sources for the gold-quartz-arsenopyrite ores (Eu/Sm — 0,08—0,14),

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