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Journal articles on the topic 'Younger Granite'

Author: Grafiati

Published: 3 June 2025

Last updated: 31 July 2025

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1

Imeokparia, E. G. "Geochemical evolution of the Jarawa Younger Granite complex and its related mineralization, northern Nigeria." Geological Magazine 122, no. 2 (1985): 163–73. http://dx.doi.org/10.1017/s0016756800031071.

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AbstractThe Jarawa Younger Granite complex is composed of high silica alkali granites that were emplaced 161 Ma ago. The granites are characterized by high contents of Rb, Li, F, Sn, Nb, W above normal low-Ca granitic rocks and have typical S-type characteristics that are indicative of a substantial component of crustal melt.Mineralization in the complex is associated with the biotite granite which was emplaced as a sheet-like body at relatively shallow depth and occurs as disseminations and as greisen lodes and veins.Chemical studies of the granites have shown that the biotite granite represe

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2

Guimarães, Frederico Sousa, Rongqing Zhang, Bernd Lehmann, Alexandre Raphael Cabral, and Francisco Javier Rios. "CASSITERITE U-Pb GEOCHRONOLOGY OF THE SANTA BÁRBARA TIN DISTRICT, RONDÔNIA TIN PROVINCE, BRAZIL." Economic Geology 117, no. 3 (2022): 719–29. http://dx.doi.org/10.5382/econgeo.4876.

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Abstract The Mesoproterozoic Rondônia Tin Province of the Amazonian craton records a protracted history of about 600 m.y. of successive rare-metal granite intrusions and hosts the youngest known event of tin-granite emplacement of the craton—a rare-metal granite suite known as the Younger Granites of Rondônia intrusive suite. The ~1 Ga suite is currently interpreted as intracratonic magmatism resulting from a Grenvillian-age orogeny during the assembly of Rodinia. The Santa Bárbara massif is a tin-granite system of the Younger Granites of Rondônia intrusive suite that hosts Sn-Nb-Ta-W–bearing

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A.Olasehinde, Ashano E.C, and Singh G.P. "ANALYSIS OF MAGNETIC ANOMALY OVER THE RIRUWAI YOUNGER GRANITE RING COMPLEX: A GEODYNAMIC IMPLICATION." Continental J. Earth Sciences 7, no. 1 (2012): 9–18. https://doi.org/10.5281/zenodo.833416.

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The Riruwai Complex constitutes one of the Younger Granite Complexes in Nigeria within the Niger-Nigeria anorogenic belt province, located about 140Km south of Kano. It provides one of the finest examples of the complete cycle of anorogenicmagmaticactivities in Nigerian Province, and consists of alkaline volcanic and plutonic rocks ranging from pyroxene bearing porphyries, rhyolites and comendites, to riebeckite granites. The aeromagnetic intensity field anomaly of the Riruwai Younger Granite ring complex has been studied and analyzed to establish the tectonic nature of the complex and its inf

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Sarvothaman, H., and C. Leelanandam. "Peraluminous, Metaluminous and Alkaline Granites from Parts of Andhra Pradesh and Karnataka in the Dharwar Craton: A Critical Reappraisal of Existing Data." Journal Geological Society of India 39, no. 4 (1992): 279–91. http://dx.doi.org/10.17491/jgsi/1992/390402.

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Abstract Predominant rocks in the Medak-Nizamabad segment in Andhra Pradesh are of a granodiorite-adamellite-granite (GAG) suite; the Alumina Saturation Indices or the molar Al2O2/(CaO + Na2O + K2O) of these units indicate that they arc metaluminous. This suite contains inclusions of a peraluminous tonalite-trondhjemite (IT) suite. A younger peraluminous suite of K-rich granite, granite (s.s.) and adamellite (KGA) intrudes the metaluminous GAG suite and the peraluminous IT suite; a body of alkaline granite intrudes the peraluminous granites. The tonalite-trondhjemite protoliths of the ca. 3000

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5

El, Mezayen AM, Bakr MA Abu, HMY Sherif, Nahas HA El, and HH Ali. "Geology and Radioactivity of the Basement Rocks of Wadi El-Sahu Area, Southwestern Sinai, Egypt." Greener Journal of Geology and Earth Sciences 4, no. 1 (2016): 1–22. https://doi.org/10.15580/GJGES.2016.1.021716041.

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The study area is covered by basement and sedimentary rocks. The basement rocks are represented by paragneiss, orthogneiss and younger granites, while the sedimentary succession is represented by clastic Paleozoic rocks. The younger granites are microscopically distinguished into monzogranite and syenogranite. Geochemically, the studied younger granites are peraluminous with alkaline affinity (moderately alkaline) originated in extensional regime. Monzogranite belongs to I-type granite formed in volcanic arc tectonic setting, while the syenogranite belongs to A-type formed in within-plate tect

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6

T, Aga, and Haruna A. I. "The field geology and petrography of the kofayi younger granite complex, central Nigeria." International Journal of Advanced Geosciences 7, no. 2 (2019): 95. http://dx.doi.org/10.14419/ijag.v7i2.29055.

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The Kofayi Younger Granite Complex is one of the several anorogenic alkaline Younger Granite Complexes that is located approximately 45 kilometres north east of Jos, Nigeria. The complex is found to comprise of felsic rocks like; biotite-granites, biotite microgranites and granodiorites. They are also found to be associated with mafic rocks like diorites which, at some portions have formed hybrid rocks. Quartz- feldspar- granites are the porphyritic rocks that found in the ring complex. The complex intrude the basement rocks of central Nigeria. Structural trends on these rocks suggest that the

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STEPANYUK, L. M., S. I. KURYLO, O. V. KOVTUN, T. I. DOVBUSH, and O. B. VYSOTSKY. "Uranium-Lead Geochronology of Two-Feldspar Granites of the Inhul Megablock (Ukrainian Shield) by Monazite." Mineralogical journal 43, no. 2 (2021): 49–57. http://dx.doi.org/10.15407/mineraljournal.43.02.049.

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In the area of the Novooleksandrivka village, the valley of the Bokovenka river crosses a powerful strip of metamorphic rocks of the Inhulo-Inhulets series with numerous small granitoid bodies of the Kirovohrad complex. In the right bank of the river valley north of Novooleksandrivka there are almost continuous rock outcrops of porphyry-like, mostly coarse-grained garnet-biotite granites, which are cut by veins of aplite-pegmatoid and pegmatoid granites. Uranium-lead isotope systems of accessory monazites from porphyry-like granite, layered body of uneven-grained granite and from veined body o

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Chappell, B. W., and W. E. Stephens. "Origin of infracrustal (I-type) granite magmas." Earth and Environmental Science Transactions of the Royal Society of Edinburgh 79, no. 2-3 (1988): 71–86. http://dx.doi.org/10.1017/s0263593300014139.

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ABSTRACTI-type granites are produced by partial melting of older igneous rocks that are metaluminous and hence have not undergone any significant amount of chemical weathering. In the Lachlan Fold Belt of southeastern Australia and the Caledonian Fold Belt of Britain and Ireland there was a major magmatic event close to 400 Ma ago involving a massive introduction of heat into the crust. In both areas, that Caledonian-age event produced large volumes of I-type granite and related volcanic rocks. Granites of these two areas are not identical in character but they do show many similarities and ar

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Conliffe, J., and M. Feely. "Fluid inclusions in Irish granite quartz: monitors of fluids trapped in the onshore Irish Massif." Earth and Environmental Science Transactions of the Royal Society of Edinburgh 101, no. 1 (2010): 53–66. http://dx.doi.org/10.1017/s1755691010009047.

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ABSTRACTFluid inclusion studies of granite quartz provide an opportunity to study fluid flow associated with igneous activity and post-emplacement fluid processes. This study presents new fluid inclusion data from the late Caledonian Donegal granites and Newry granodiorite, and the Tertiary Mourne Mountains granite in Ireland, which identify three distinct fluids. Aqueous-carbonic fluids (Type 1) have been recorded in late Caledonian granites with a significant mantle component (Newry granodiorite and the Ardara and Thorr granites in Donegal). These fluids represent late-magmatic fluids trappe

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Dunning, G. R., C. Lepvrier, S. J. O'brien, S. P. Colman-Sadd, and H. Maluski. "Chronology of Avalonian events on Presqu'île du Cap Miquelon (Le Cap), Saint-Pierre et Miquelon (France)." Canadian Journal of Earth Sciences 32, no. 7 (1995): 952–58. http://dx.doi.org/10.1139/e95-080.

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U/Pb geochronology and field studies on Presqu'île du Cap Miquelon demonstrate that amphibolite-grade metamorphism, ductile deformation, and subsequent plutonism in this part of the Appalachian Avalon Zone are of Proterozoic age. Clear, crosscutting relationships between a dated granite dyke (part of the Cap Blanc granite) and foliated, amphibolite-grade metasedimentary and metaigneous rocks provide a younger age limit of [Formula: see text] Ma for tectonism. Proterozoic titanite and hornblende ages indicate that no significant younger thermal overprint occurred such as those recorded in nearb

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Rashid, S. A., and S. M. Zainuddin. "The Lower Paleozoic Granitic Magmatism Near Ranikhet, Kumaun Himalaya: Major and Trace-Element Geochemistry and Tectonic Setting." Journal Geological Society of India 46, no. 1 (1995): 15–25. http://dx.doi.org/10.17491/jgsi/1995/460102.

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Abstract The Lower Paleozoic Ranikhet granitic rocks lie in between the tectonically active South and North Almora thrust zones and contain two types of granites: a Gneissose granite (GG) and a younger Porphyritic granite (PG). Both the phases show a good correlation in some of the major elements, whereas a wide scatter is observed in the trace-elemental abundances. These Ranikhet granites are Rb rich and Sr poor, they reveal peraluminous characteristics and correspond to the S-type granites. A syn-collisional tectonic environment for these granites is revealed by their Nb+Y and Rb concentrati

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12

Gosselin, D. C., J. J. Papike, C. K. Shearer, Z. E. Peterman, and J. C. Laul. "Geochemistry and origin of Archean granites from the Black Hills, South Dakota." Canadian Journal of Earth Sciences 27, no. 1 (1990): 57–71. http://dx.doi.org/10.1139/e90-005.

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The Little Elk Granite (2549 Ma) and granite at Bear Mountain (BMG) (~2.5 Ga) of the Black Hills formed as a result of a collisional event along the eastern margin of the Wyoming Province during the late Archean. Geochemical modelling and Nd isotopic data indicate that the Little Elk Granite was generated by the partial melting of a slightly enriched (εNd = −1.07 to −3.69) granodioritic source that had a crustal residence time of at least 190 Ma. The medium-grained to pegmatitic, peraluminous, leucocratic BMG was produced by melting a long-lived (>600 Ma), compositionally variable, enriched

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13

Sardi, Fernando G., Pablo Grosse, Mamoru Murata, and Rafael Pablo Lozano Fernández. "Internal framework and geochemistry of the Carboniferous Huaco granite pluton, Sierra de Velasco, NW Argentina." Andean Geology 45, no. 2 (2018): 229. http://dx.doi.org/10.5027/andgeov45n2-3015.

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The A-type Huaco granite pluton of the Velasco range (Sierras Pampeanas of northwest Argentina) is formed by three coeval granitic facies and contains subordinate coeval-to-late facies, as well as enclaves, dikes and stocks that show different temporal relations, textures and compositions. The dominant facies (Regional Porphyritic Granite; RPG) is a porphyritic two-mica monzo- to syenogranite, with abundant microcline megacrysts up to 12 cm in size. It was emplaced in a dominant extensional setting and has a mainly crustal source but with participation of a mantle-derived component. The RPG tr

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14

Bolarinwa, Anthony Temidayo, and Adewole John Adeola. "Geochemistry of Weathered Profiles over Syenite and Younger Granite in Pankshin Area, North Central Nigeria." Earth Science Research 6, no. 1 (2016): 63. http://dx.doi.org/10.5539/esr.v6n1p63.

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Metallic ores of economic values often occur within profiles above basement rocks in tropical regions due to weathering and secondary enrichment. This study is carried out to determine the geochemistry and appraise the potential for metallic ore enrichment in the weathered profiles over Syenite and Younger Granite in Pankshin area. Top-soil, laterite and rock samples are collected from two lateritic profiles above Syenite and Younger Granite. The syenite rock is composed of alkali feldspars (perthite), nepheline, clinopyroxene, with minor amount of orthopyroxene, hornblende, plagioclase and fe

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15

P., R. C. Phani, Sreenu K., and Ningam N. "Field Geological and Petrographic Study of Granitic Rocks around Devadurga, Eastern Dharwar Craton, Southern India." International Journal of Trend in Scientific Research and Development 2, no. 5 (2018): 2248–54. https://doi.org/10.31142/ijtsrd18227.

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Field geological and petrographic characteristics of granitic rocks and their variants exposed at Devadurga town, Raichur district, Karnataka are described. The granitic rocks of Devadurga are part of younger 'Closepet granite' within a country of Peninsular Gneissic Complex PGC of Archaean age. Based on field and petrographic observations of this investigation, the younger granitic rocks of 'Closepet granite' within the study area can be sub divided into leucogranite, grey porphyritic granite, pink granite, pink biotite granite, grey biotite granite, pink porphyritic granite.

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16

Amuda, Abdulgafar Kayode, Shuang Li, Xiaoyong Yang, Jingya Cao, and Mohamed Faisal. "Genetic Association between Granites and Mineralization at the Gindi Akwati Cassiterite–Sulfide Deposit, North-Central Nigeria: Insights from Mineralogy, Fluid Inclusions, and Sulfur Isotopes." Minerals 12, no. 6 (2022): 761. http://dx.doi.org/10.3390/min12060761.

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The cassiterite–sulfide mineralization occurs within quartz veins and greisenized Precambrian Older Granite around the Gindi Akwati region at the Ropp complex’s western boundary, north-central Nigeria. The intrusion of Jurassic Younger granite porphyry sheared the marginal parts of the Older Granite and the mylonitized zone created pathways for fluids that escaped during the late-stage consolidation of Jurassic biotite granite. The biotite granites are highly differentiated (K/Rb < 200), peraluminous (A/CNK > 1), high-K, and have high Sn concentrations (average = 117 ppm). The intrusion

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El-fakharany, Maged, Ahmed Omar, and Mahmoud Abdellatif. "The influence of mineralogical composition and alkali reactivity for utilization of some Egyptian crushed granites as a concrete aggregate." Journal of Building Materials and Structures 10, no. 1 (2023): 27–39. http://dx.doi.org/10.34118/jbms.v10i1.2884.

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Egyptian Eastern Desert is rich in many areas that contain granites masses throughout the geological era; some of them show good characteristics of the rock hardness, durability, density and mineralogy. This current research aims to utilize three main types of granite aggregates based on their mineralogical composition and Alkali reactivity with cement during concrete production. The studied granite aggregate can be also classified into red younger granite aggregate, white older granite aggregate and grey older granite aggregate. Evaluating these granite rocks as aggregate used in concrete mix

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18

Kerr, A., G. R. Dunning, and R. D. Tucker. "The youngest Paleozoic plutonism of the Newfoundland Appalachians: U–Pb ages from the St. Lawrence and François granites." Canadian Journal of Earth Sciences 30, no. 12 (1993): 2328–33. http://dx.doi.org/10.1139/e93-202.

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The posttectonic St. Lawrence and François granites have long been regarded as the youngest Paleozoic plutonic suites of the Newfoundland Appalachians. Their U–Pb ages of 374 ± 2 and 378 ± 2 Ma, respectively, define a Middle to Late Devonian magmatic event. Mid-Carboniferous magmatic and (or) rifting events, suggested on the basis of earlier Rb–Sr dating of the St. Lawrence Granite, are not supported by these new data. Both granites intrude major ductile and brittle structures that were active during the early Paleozoic, and they provide a younger age limit for major tectonic activity in the A

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Abdel Hamid, Amr, Seddik Seddik, Mohamed Hassan, and Hicham Abdel Hamid. "Geology, Petrography, and Geochemistry of Younger Granites and Related Radioactive Pegmatite from Gabal El Urf Area, North Eastern Desert, Egypt: Implications for the Evolution of the NYF-Type Rare-Elements Granitic Pegmatite." Iraqi Geological Journal 56, no. 2E (2023): 1–18. http://dx.doi.org/10.46717/igj.56.2e.1ms-2023-11-6.

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Gabal El Urf region is located in the northern Egyptian Eastern Desert and overlain essentially by older and younger granitoids of Late Proterozoic age. These granitoids contain numerous outcrops of pegmatites, mostly occurring as dikes and veins or huge separated masses. In the contrary, pegmatites form lens-like bodies enclosed within the younger granites along their margins. Previous radiometric surveys showed anomalous concentrations of radioactivity on pegmatite body, located to the south of the study region. The younger granites and the associated radioactive pegmatite are studied in det

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Kellett, Dawn A., Neil Rogers, Vicki McNicoll, Andrew Kerr, and Cees van Staal. "New age data refine extent and duration of Paleozoic and Neoproterozoic plutonism at Ganderia–Avalonia boundary, Newfoundland." Canadian Journal of Earth Sciences 51, no. 10 (2014): 943–72. http://dx.doi.org/10.1139/cjes-2014-0090.

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Devonian and younger plutonic suites of the Appalachian orogen in Newfoundland form a curvilinear belt straddling the boundary between Ganderia and Avalonia, and exhibit a general pattern of younging to the southeast. However, many individual plutonic suites within this belt remain undated or have ages that are poorly constrained. This study reports U–Pb sensitive high-resolution ion microprobe (SHRIMP) data from zircon and 40Ar–39Ar data from hornblende, biotite, and muscovite, which collectively improve definition of post-tectonic plutonic events in southeastern Newfoundland, but at the same

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PIMENTEL, MÁRCIO M., and NILSON F. BOTELHO. "Sr and Nd isotopic characteristics of 1.77-1.58 Ga rift-related granites and volcanics of the Goiás tin province, central Brazil." Anais da Academia Brasileira de Ciências 73, no. 2 (2001): 263–76. http://dx.doi.org/10.1590/s0001-37652001000200010.

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Supracrustal rocks of the Araí Group, together with coeval A-type granites represent a ca. 1.77-1.58 Ga old continental rift in Brazil. Two granite families are identified: the older (1.77 Ga) group forms small undeformed plutons, and the younger granites (ca. 1.58 Ga) constitute larger, deformed plutons. Sr-Nd isotopic data for these rocks indicate that the magmatism is mostly product of re-melting of Paleoproterozoic sialic crust. Initial Sr ratios for both granite families are ca 0.726 and 0.720. Most TDM model ages are between 2.58 and 1.80 Ga. epsilonND(T) values are between +3.6 and -11.

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Harding, K. L., W. A. Morris, S. J. Balch, P. Lapointe, and A. G. Latham. "A comparison of magnetic character and alteration in three granite drill cores from eastern Canada." Canadian Journal of Earth Sciences 25, no. 8 (1988): 1141–50. http://dx.doi.org/10.1139/e88-112.

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Bulk magnetic susceptibility (BMS) measurements have been made on granite drill cores from the St. George batholith (New Brunswick), the South Mountain batholith (Nova Scotia), and the Wedgeport pluton (Nova Scotia). The primary magnetite concentrations of the two Nova Scotia cores are statistically indistinguishable, thus lending support to the hypothesis that the Wedgeport pluton, despite being 50 Ma younger, is a satellite of the South Mountain batholith.The St. George core has a primary magnetite concentration over 30 times greater than the Nova Scotia cores, but low-temperature alteration

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Mohammadi, Nadia, Christopher R. M. McFarlane, and David R. Lentz. "U–Pb Geochronology of Hydrothermal Monazite from Uraniferous Greisen Veins Associated with the High Heat Production Mount Douglas Granite, New Brunswick, Canada." Geosciences 9, no. 5 (2019): 224. http://dx.doi.org/10.3390/geosciences9050224.

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A combination of in situ laser ablation inductively coupled plasma–mass spectrometry (LA ICP–MS) analyses guided by Scanning Electron Microscope–Back-Scattered Electron imaging (SEM–BSE) was applied to hydrothermal monazite from greisen veins of the Late Devonian, highly evolved, uraniferous Mount Douglas Granite, New Brunswick, Canada. Understanding the uraniferous nature of the suite and characterizing the hydrothermal system that produced the associated mineralized greisen veins were the main goals of this study. The uraniferous nature of the Mount Douglas Granite is evident from previous a

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Pe-Piper, Georgia, David J. W. Piper, Angeliki Papoutsa, and Joshua Wisen. "Fractured latest Devonian granites of the West Moose River pluton along the Cobequid Shear Zone, Nova Scotia: implications for regional mineralization." Canadian Journal of Earth Sciences 54, no. 11 (2017): 1119–37. http://dx.doi.org/10.1139/cjes-2017-0133.

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Latest Devonian (∼365–358 Ma) A-type granites in the Cobequid Highlands host complex sequences of rare-earth element (REE) and other hydrothermal minerals. The West Moose River pluton is the only pluton truncated and brittly deformed by the mid-Carboniferous (∼327 Ma) strike-slip Minas Fault Zone during the Alleghanian orogeny. Fractures in the granite provide a record of several deformational and hydrothermal events with distinct mineral assemblages. Early sodic alteration produced albitization of feldspar, and riebeckite and tourmaline veins. The δ18O of albite and albitized granite (5‰–6‰)

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Nutman, A. P., Brian Chadwick, B. Krishna Rao, and V. N. Vasudev. "SHRIMP U/Pb Zircon Ages of Acid Volcanic Rocks in the Chitradurga and Sandur Groups, and Granites Adjacent to the Sandur Schist Belt, Karnataka." Journal Geological Society of India 47, no. 2 (1996): 153–64. http://dx.doi.org/10.17491/jgsi/1996/470202.

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Abstract SHRIMP U/Pb dating of zircon grains from a schistose acid volcanic rock from the Daginkatte Formation in the Chitradurga Group of the Late Archaean Dhwar Supergroup in western Karnataka has yielded a precise concordant age of 2614 ± 8 Ma which indicates the time of melt crystallisation. In contrast, zircons from similar schistose acid volcanic rocks in the Vibhuti Gudda Formation of the Sandur Group in the Sandur schist belt of eastern Karnataka yielded less precise concordia intercept ages of 2658±14 and 2691±18 Ma. Zircons from high-strain grey gneisses which appear to be the oldest

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P., R.C.Phani, Ningam N., and Srinivas M. "Field Geology and Petrography of Granitoid rocks in southeastern part of Nanded district, Maharashtra State." International Journal of Trend in Scientific Research and Development 1, no. 6 (2017): 988–96. https://doi.org/10.31142/ijtsrd4710.

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This paper presents field geological and petrographic aspects of various granitoid units occurring around Khatgaon area in the southeastern part of Nanded district of Maharashtra. The study area is bestowed with granitoids of Archaean to Proterozoic age overlain by Deccan basalts of Cretaceous age. Three main types of granitoids were identified in the study area viz., older granites, gneissic foliated granites and younger granites. These granitoid rocks are traversed by dykes, veins and veinlets of felsic and mafic composition. Although these granitoids are similar in mineralogy, they exhibit

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El Dabe, Mohamed M., A. M. Ismail, Mohamed Metwaly, Sherif A. Taalab, Mohamed Y. Hanfi, and Antoaneta Ene. "Hazards of Radioactive Mineralization Associated with Pegmatites Used as Decorative and Building Material." Materials 15, no. 3 (2022): 1224. http://dx.doi.org/10.3390/ma15031224.

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The present study aimed to assess the radiological hazards associated with applying the investigated granite in the building materials and the infrastructures applications. The investigated granites are classified into four categories: El-Urf, barren, colourful and opaque. El Urf monzogranite intrudes metagabbro diorite complex with sharp contacts. Based on the activity concentrations, the environmental parameters such as absorbed dose rate (Dair), annual effective dose (AED), radium equivalent activity (Raeq), external (Hex) and internal (Hin) hazard indices were measured. The mineralized peg

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Thompson, Margaret D., James L. Crowley, and Jahandar Ramezani. "New dimensions of Ediacaran Magmatism in the southeastern New England Avalon zone, USA." Atlantic Geoscience 61 (May 24, 2025): 225–51. https://doi.org/10.4138/atlgeo.2025.009.

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High precision CA-ID-TIMS U-Pb zircon dates presented here establish 627.68 ± 0.66 Ma (2s internal uncertainty) Diorite at Rowley and associated granite near Topsfield, Massachusetts as the earliest arc-related magmatic rocks recognized so far in the Southeastern New England Avalon Zone. Granite dated at 609.10 ± 0.18 Ma on the southern extremity of this terrane in Newport, Rhode Island corresponds in age to previously dated Dedham Granite that is widespread in the vicinity of Boston, Massachusetts. Slightly younger diorite (605.48 ± 0.21 Ma) in an upfaulted block west of Boston clusters with

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Pe-Piper, Georgia, and David Piper. "Controls on Barite Mineralization in a Major Intracontinental Shear Zone: Carboniferous of the Cobequid Highlands, Nova Scotia." Minerals 11, no. 12 (2021): 1413. http://dx.doi.org/10.3390/min11121413.

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Prominent veins of late Carboniferous barite, associated with fluorite and calcite, outcrop close to older granite plutons along an intracontinental shear zone that was active throughout the Carboniferous in southeastern Canada. Some barite is stratigraphically constrained to younger than 315 Ma and final mineralization is constrained by a published Rb–Sr isochron of 300 ± 6 Ma. Barite occurrences in the Carboniferous basins of central Nova Scotia, 50 km to the south, are synchronous with or post-date ankerite-siderite-magnetite-pyrolusite and Pb-Zn mineralization, which was facilitated by flu

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Hogan, John P., M. Charles Gilbert, and Jon D. Price. "Crystallisation of fine- and coarse-grained A-type granite sheets of the Southern Oklahoma Aulacogen, U.S.A." Earth and Environmental Science Transactions of the Royal Society of Edinburgh 91, no. 1-2 (2000): 139–50. http://dx.doi.org/10.1017/s0263593300007331.

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A-type felsic magmatism associated with the Cambrian Southern Oklahoma Aulacogen began with eruption of voluminous rhyolite to form a thick volcanic carapace on top of an eroded layered mafic complex. This angular unconformity became a crustal magma trap and was the locus for emplacement of later subvolcanic plutons. Rising felsic magma batches ponding along this crustal magma trap crystallised first as fine-grained granite sheets and then subsequently as coarser-grained granite sheets. Aplite dykes, pegmatite dykes and porphyries are common within the younger coarser-grained granite sheets bu

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Lamoso, Ingrid Souto Maia, and Valdecir De Assis Janasi. "SHRIMP U-Pb zircon dating of Neoproterozoic granites from the easternmost São Roque Domain, Ribeira Belt." Geologia USP. Série Científica 19, no. 3 (2019): 55–75. http://dx.doi.org/10.11606/issn.2316-9095.v19-148374.

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Four granitic plutons from the easternmost portion of the São Roque Domain (SRD) were dated by U-Pb zircon SHRIMP; the results indicate that the peak of granitic magmatism was concentrated in a short interval (606–589 Ma), the same as in the central portion of the SRD. The two porphyritic biotite granites (Morro Azul and Imbiruçu) yield the oldest ages (respectively, 601.0 ± 4.9 Ma and 606.3 ± 4.8 Ma) and have inherited zircons with similar ages (~2.1–2.0 Ga), but are not comagmatic. The Morro Azul granite has geochemical signature similar to other high-K calc-alkaline (HKCA) granites from the

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m ABU EL-LEIL ALI, Ibrahim, Abdellah Sadek TOLBA, Hamdy Ahmed Mohamed AWAD, Aleksey Valer’evich NASTAVKIN, Sayed Ahmed OMAR, and Mohamed Galal EL-FEKY. "Geological and geochemical studies on El-Missikat granites, Central Eastern Desert, Egypt." NEWS of the Ural State Mining University, no. 4 (December 20, 2020): 7–18. http://dx.doi.org/10.21440/2307-2091-2020-4-7-18.

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Objective. The present work deals with the detailed investigations of the geology, geochemistry, and tectonic setting of the studied granitic rocks. Research methods. This work involves both field work (Collection samples and drawing of a new geological map) and laboratory work (preparation of thin sections for petrographic studies by polarizing microscope), Atomic absorption, X-ray Fluorescence analysis (XRF) in the Central Laboratories of the Acme in Canada and Mass-Spectrometer with Inductively Coupled Plasma (ICPMS). Result. The study area restricted in the Central Eastern Desert of Egypt

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Moustapha, Sanda Chékaraou Mahamane, Badamassi Kadri Mahaman Mansour, and Konaté Moussa. "Petrographic Characterisation of the Mounio "Younger Granites" Province, Central Portion of the Pan-African Mobile Chain at Gouré, South-East Niger." Current Journal of Applied Science and Technology 43, no. 12 (2024): 175–91. https://doi.org/10.9734/cjast/2024/v43i124469.

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The petrography of the Mounio province, the subject of this study, is poorly understood, as very few geological studies have been undertaken. This province is an integral part of the Pan-African mobile zone located to the east of the West African craton, between the Tuareg and the Benino-Nigerian Shields. In the study area, the Pan-African formations were intruded by anorogenic magmatism, resulting in the emplacement of the Younger granites. Most of the petrographic data in this area of the Niger basement come from geological correlations. The aim of this study is to update the geological map

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Mustapha, S., S. Suleman, S. R. Iliyasu, et al. "INTERPRETATION OF AEROMAGNETIC DATA AND LANDSAT IMAGERY OVER THE NIGERIAN YOUNGER GRANITES IN AND AROUND KAFANCHAN AREA, NORTH-CENTRAL NIGERIA." FUDMA JOURNAL OF SCIENCES 4, no. 4 (2021): 323–33. http://dx.doi.org/10.33003/fjs-2020-0404-489.

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In this research the lineaments of the Kafanchan area in North-central Nigeria were investigated in order to explore the mineralization zones of the area. Aeromagnetic data over Kafanchan and environs within the Younger Granite Province, in the North-Central Nigeria were collated and analyzed. The aeromagnetic map of the area was interpreted both qualitatively and quantitatively so as to identify the nature of the magnetic sources and the trends direction in the study area. The trend of the Total Magnetic Intensity (TMI) map is predominantly in NE-SW. The First Vertical Derivative (FVD) Lineam

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Robb, L. J., F. M. Meyer, C. J. Hawkesworth, and N. J. Gardiner. "Petrogenesis of Archaean granites in the Barberton region of South Africa as a guide to early crustal evolution." South African Journal of Geology 124, no. 1 (2021): 111–40. http://dx.doi.org/10.25131/sajg.124.0021.

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ABSTRACT The Barberton region of South Africa is characterized by a broad variety of granite types that range in age from ca. 3.5 Ga to 2.7 Ga and reflect the processes involved in the formation of Archaean continental crust on the Kaapvaal Craton. These granites are subdivided into three groups, as follows: A tonalite-trondhjemite-granodiorite (TTG) suite diapirically emplaced at 3 450 Ma and 3 250 Ma into pre-existing metamorphosed greenstone belt material. TTG melts were derived from melting amphibolite in the lower crust, with individual plutons being emplaced at various crustal levels. Th

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Imeokparia, Ebo Gab. "Geochemical evolution of the metaluminous and peraluminous granites of Ganawuri Younger Granite Complex, northern Nigeria." Journal of African Earth Sciences (1983) 5, no. 2 (1986): 193–200. http://dx.doi.org/10.1016/0899-5362(86)90010-2.

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Stone, M., J. Klomínský, and G. S. Rajpoot. "Composition of trioctahedral micas in the Karlovy Vary pluton, Czech Republic and a comparison with those in the Coruubian batholith, SW England." Mineralogical Magazine 61, no. 409 (1997): 791–807. http://dx.doi.org/10.1180/minmag.1997.061.409.04.

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AbstractTrioctahedral micas in the Karlovy Vary pluton range in composition from Fe-biotites in the granites of the Older Intrusive Complex (OIC) through siderophyllite and lithian siderophyllite to zinnwaldite in the granites of the Younger Intrusive Complex (YIC). Li + AlVI + Si would appear to substitute for Fe2+ + AlIV in biotite with a formula similar to that given in Henderson et al. (1989), but Li + Si appears to substitute for Fe2+ + AlIV in the Li-micas. In mica vs. host rock plots, Rb and F show positive linear covariation except for the Li-mica granites, but femic constituents and t

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Sant’Ovaia, Helena, Cláudia Cruz, Ana Gonçalves, Pedro Nogueira, and Fernando Noronha. "Deciphering Iberian Variscan Orogen Magmatism Using the Anisotropy of Magnetic Susceptibility from Granites." Minerals 14, no. 3 (2024): 309. http://dx.doi.org/10.3390/min14030309.

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In this paper, we have synthesized the information derived from more than 20 papers and PhD theses on the anisotropy of the magnetic susceptibility (AMS) of 19 Variscan granite plutons, spanning the period between 320 Ma and 296 Ma. The AMS data are obtained from 876 sampling sites with more than 7080 AMS measurements and a re-interpretation is proposed. The studied granites exhibit a magnetic susceptibility (Km) ranging from 30 to 10,436 × 10−6 SI units. Most granites typically exhibit Km values below 1000 × 10−6 SI, indicative of paramagnetic behavior. Biotite serves as the main carrier of i

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Tang, Yuyu, Hua Kong, Biao Liu, et al. "Geochronology, Whole-Rock Geochemistry, and Sr–Nd–Hf Isotopes of Granitoids in the Tongshanling Ore Field, South China: Insights into Cu and W Metallogenic Specificity." Minerals 12, no. 7 (2022): 892. http://dx.doi.org/10.3390/min12070892.

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The Qin-Hang Metallogenic Belt (QHMB), an important metallogenic belt in South China, hosts Cu and W–Sn polymetallic deposits. The Tongshanling ore field in the QHMB is characterized by the coexistence of Cu- and W-bearing polymetallic deposits, which are related to granodiorite and granite porphyry. This study examined whole-rock geochemistry, geochronology, and Sr–Nd–Hf isotopes to determine the genetic relationship between diverse ore-related granitoids (i.e., granodiorite and granite porphyry) and Cu–W metallogeny in the Tongshanling ore field. Zircon LA-ICP-MS U–Pb dating shows that the g

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Artemenko, G. V., L. V. Shumlyanskyy, I. A. Shvaika, and V. K. Butyrin. "AGE OF THE HANNIVKA GRANITE (MIDDLE-DNIEPER MEGABLOCK OF THE UKRAINIAN SHIELD)." Mineralogical Journal 44, no. 4 (2022): 73–83. http://dx.doi.org/10.15407/mineraljournal.44.04.073.

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The Middle-Dnieper megablock, which is a fragment of the craton, differs from other cratons found on Earth. This is because of the large variety of granitoids (Tokiv, Mokro-Moskowka, and Demuryne complexes) in the former that were formed after the Mesoarchean TTG. Thus, the Middle-Dnieper megablock is important for studying the genesis and geodynamic formation conditions of Late Archaean granitoids. The granitoids in the Middle-Dnieper megablock are not well understood. They include the Hannivka granites of the East Hannivka monocline of the Kryvyi Rih-Kremenchuk structure, whose age and strat

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Ahmed, A. Ramadan, El-Azab Ashraf, A.M. El-Metwally Ahmed, and A. Abd El-Bary Amany. "Mineral Recource Prospecting and Evaluation of Dry Stream Sediments of Wadi Umm Gheig – Umm Naggat Area, Eastern Desert, Egypt." International Journal of Innovative Research in Multidisciplinary Education 03, no. 05 (2024): 866–72. https://doi.org/10.5281/zenodo.11394954.

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The area of Wadi Umm Gheig-Umm Naggat is located at the central part of the Eastern desert, Egypt, 50km south to El-Quseir city at the Red Sea coast. The area is dominated by metavolcanics, Older Granites, Dokhan Volcanics, intrusive cumulate gabbro and Younger Granites. This works focuses on heavy minerals distributed in dry stream sediments of Wadi Umm Gheig and Gabal Umm Nagat. The study has followed up the traditional methods for sample collection from the stream sediments and the plane study for investigation and prospecting, as well as evaluation of heavy mineral deposits. The studied be

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Shniukova, K. Ye, L. L. Tomurko, and N. M. Konoval. "Geochemistry of Xenoliths in Rapakivi Granites of the Korsun-Novomyrhorod Pluton (Ukrainian Shield)." Mineralogical Journal 45, no. 2 (2023): 62–82. http://dx.doi.org/10.15407/mineraljournal.45.02.062.

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Rapakivi of the Korsun-Novomyrhorod pluton (KNP), being the latest Precambrian granites of the central part of the Ukrainian shield, contain older acidic and intermediate rocks as xenoliths, the geochemical features of which reflect the Early Proterozoic geodynamic situation. Rapakivi granites, their differentiates and three types of xenoliths in them, represented by plagiogneiss, pink granite and charnockitoid (mangerite), were selected in the northwestern part of the KNP for geochemical studies. Analysis findings were compared with the geochemical characteristics of similar rocks of igneous

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González-Becuar, Elizard, Efrén Pérez-Segura, Ricardo Vega-Granillo, et al. "Laramide to Miocene syn-extensional plutonism in the Puerta del Sol area, central Sonora, Mexico." Revista Mexicana de Ciencias Geológicas 34, no. 1 (2017): 45. http://dx.doi.org/10.22201/cgeo.20072902e.2017.1.401.

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Plutonic rocks of the Puerta del Sol area, in central Sonora, represent the extension to the south of the El Jaralito batholith, and are part of the footwall of the Sierra Mazatán metamorphic core complex, whose low-angle detachment fault bounds the outcrops of plutonic rocks to the west. Plutons in the area record the magmatic evolution of the Laramide arc and the Oligo-Miocene syn-extensional plutonism in Sonora. The basement of the area is composed by the ca. 1.68 Ga El Palofierral orthogneiss that is part of the Caborca block. The Laramide plutons include the El Gato diorite (71.29 ± 0.45

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Imaoka, Teruyoshi, Sachiho Akita, Tsuyoshi Ishikawa, et al. "Petrogenesis of an Episyenite from Iwagi Islet, Southwest Japan: Unique Li–Na Metasomatism during the Turonian." Minerals 14, no. 9 (2024): 929. http://dx.doi.org/10.3390/min14090929.

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A unique Li–Na metasomatic rock from Iwagi Islet in Southwest (SW) Japan is an episyenite that contains new Li-rich minerals, including sugilite, katayamalite, murakamiite, and ferro-ferri-holmquistite. We present petrographical, mineralogical, and geochronological data for the protoliths and episyenite. We classified the metasomatic rocks based on the mineral assemblages, from the protolith biotite granite to albitized granite, quartz albitite, hedenbergite albitite, aegirine albitite, sugilite albitite, and katayamalite albitite. The protolith of hedenbergite albitites may have been metasoma

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Ibe, K. K., D. E. Ajakaiye, and S. B. Ojo. "Gravity interpretation of the Zaranda Younger Granite ring complex, Nigeria." Journal of African Earth Sciences (1983) 3, no. 1-2 (1985): 253–59. http://dx.doi.org/10.1016/0899-5362(85)90039-9.

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Stepanyuk, L., О. Hrinchenko, T. Dovbush, O. Ziultsle, N. Konoval, and T. Mironchuk. "AGE SPAN FORMATION IN GRANITOIDS OF UKRAINIAN SHIELD." Visnyk of Taras Shevchenko National University of Kyiv. Geology, no. 1 (88) (2020): 12–16. http://dx.doi.org/10.17721/1728-2713.88.02.

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The paper discusses Berdychiv type granitoids that have always stirred up interest among researchers of the Ukrainian Shield. These rocks include minerals that are uncharacteristic of granites - cordierite, sillimanite, andalusite - and are closely related to rocks of the supposed substratum. At the same time, there still remain questions about the genetic nature of Berdychiv granites. Despite the fact that most researchers treat these granites as intrusive (anatectic) formations, there are other concepts according to which these granites are considered to be the products of metasomatic transf

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Kawasaki, K., and D. T. A. Symons. "Paleomagnetism of fluorite veins in the Devonian St. Lawrence granite, Newfoundland, Canada." Canadian Journal of Earth Sciences 45, no. 9 (2008): 969–80. http://dx.doi.org/10.1139/e08-045.

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Paleomagnetic results are reported from the Devonian St. Lawrence granite and the fluorite veins within the granite or its related porphyry dikes. Paleomagnetic analysis of 359 specimens from 29 sites shows that there is no statistically significant difference at 95% confidence between the site mean characteristic remanent magnetization (ChRM) directions carried by pyrrhotite and (or) magnetite of the granite and fluorite veins. No post-granite metamorphic event is known in the area. Thus, these concordant directions indicate that the granite and fluorite veins are coeval and retain a primary

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PETRONIS, M. S., B. O'DRISCOLL, V. R. TROLL, C. H. EMELEUS, and J. W. GEISSMAN. "Palaeomagnetic and anisotropy of magnetic susceptibility data bearing on the emplacement of the Western Granite, Isle of Rum, NW Scotland." Geological Magazine 146, no. 3 (2008): 419–36. http://dx.doi.org/10.1017/s0016756808005827.

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AbstractThe Western Granite is the largest of several granitic bodies around the margin of the Rum Central Igneous Complex. We report palaeomagnetic and anisotropy of magnetic susceptibility (AMS) data that bear on the emplacement and deformation of the Western Granite. The collection includes samples from 27 sites throughout the Western Granite, five sites in adjacent feldspathic peridotite, and two sites in intermediate to mafic hybrid contact aureole rocks. Palaeomagnetic data from 22 of the 27 sites in the granite provide an in situ group mean D = 213.2°, I = −69.5°, α95 = 5.5° that is dis

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Hassaan, Mahmoud M., Sayed A. Omar, Ahmed E. Khalil, et al. "Prognostic Exploration of U-F-Au-Mo-W Younger Granites for Geochemical Pathfinders, Genetic Affiliations, and Tectonic Setting in El-Erediya-El-Missikat Province, Eastern Desert, Egypt." Minerals 12, no. 5 (2022): 518. http://dx.doi.org/10.3390/min12050518.

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Younger granite bodies form two arches, the western and the eastern (WA, EA), which extend from the south northwards from the Meatique, ophiolitic group-island arc rocks, to the large older granite outcrop to the north. This paper concerns the feasibility of exploration in the El-Erediya-Ria El-Garah-El-Gidami-El-Missikat Y Gr regions. Fieldwork and remote sensing, together with geochemical, petrochemical, and mineralogical studies, are used to show the controlling factors, routes, and the origins of the deposits. Remote sensing is used to delineate the different rock units. Normal and strike–

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Denholm, J. L., A. S. Stepanov, S. Meffre, R. S. Bottrill, and J. M. Thompson. "The Geochronology of Tasmanian Tin Deposits Using LA-ICP-MS U-Pb Cassiterite Dating." Economic Geology 116, no. 6 (2021): 1387–407. http://dx.doi.org/10.5382/econgeo.4837.

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Abstract The island state of Tasmania is the most important tin producer in Australia. The spatial and genetic relationship between Tasmanian tin deposits and Devonian-Carboniferous granites, which intruded throughout the Tabberabberan orogeny, has long been understood. However, little geochronological data is available to link mineralization to nearby intrusions. In this study, we investigate the connection between 19 Tasmanian tin deposits and their potential source granites, using U-Pb cassiterite dating by laser ablation-inductively coupled plasma-mass spectrometry. Archean pegmatitic cass

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