Showing 101 - 120 results of 577 for search '"Paleoproterozoic"', query time: 0.15s Refine Results
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    High Ba–Sr adakitic charnockite suite from the Nagercoil Block, southern India: Vestiges of Paleoproterozoic arc and implications for Columbia to Gondwana by Pin Gao, M. Santosh, Cheng-Xue Yang, Sanghoon Kwon, Mu. Ramkumar

    Published 2021-05-01
    “…Zircon Hf isotopic data of the magmatic cores of zircon grains from the charnockite yielded εHf(t) values from −1.17 to 0.46 with TDM and TDMC and age peaks at 2392 Ma and 2638 Ma, suggesting Neoarchean to Paleoproterozoic juvenile sources. We suggest that the high Ba–Sr adakitic charnockite suite from the Nagercoil block formed in a Paleoproterozoic magmatic arc setting during the assembly of the Columbia supercontinent, and underwent high-grade metamorphism associated with the amalgamation of the Gondwana supercontinent during the late Neoproterozoic–Cambrian. …”
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    Origin of the Paleoproterozoic basaltic dikes from the central and eastern Dharwar Craton and sills and volcanics from the adjoining Cuddapah Basin, southern India by Chatterjee, Nilanjan

    Published 2023
    “…Abstract Reverse fractionation modeling considering energy-constrained assimilation-fractional crystallization is performed to estimate primary magma compositions, degree of crustal contamination, pressure–temperature of equilibrium with mantle, and potential temperatures for the origin of the Paleoproterozoic (~ 2.37–1.88 Ga) basaltic dikes in central and eastern Dharwar Craton and sills and volcanics in the adjoining Cuddapah Basin, southern India. …”
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    The tectonic significance of the Cabo Frio Tectonic Domain in the SE Brazilian margin: a Paleoproterozoic through Cretaceous saga of a reworked continental margin by Renata da Silva Schmitt, Rudolph Trouw, William Randall Van Schmus, Richard Armstrong, Natasha S. Gomes Stanton

    “…ABSTRACT: The Cabo Frio Tectonic Domain is composed of a Paleoproterozoic basement tectonically interleaved with Neoproterozoic supracrustal rocks (Buzios-Palmital successions). …”
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    Petrogenesis of the Paleoproterozoic Näränkävaara layered intrusion, northern Finland, Part II: U-Pb ID-TIMS age and Sm-Nd isotope systematics by Ville Järvinen, Tapio Halkoaho, Jukka Konnunaho, Jussi S. Heinonen, Sandra Kamo, Sarah Davey, Wouter Bleeker, Tuomo Karinen, O. Tapani Rämö

    Published 2022-06-01
    “…Several mafic-ultramafic layered intrusions were emplaced in the NE Fennoscandian Shield during a magmatic episode at 2.44 Ga. The Paleoproterozoic Näränkävaara layered intrusion, northern Finland, is one of the largest ultramafic bodies in the Fennoscandian Shield, with a surface area of 25 km x 5 km and a magmatic stratigraphic thickness of ~3 km. …”
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  11. 111

    Channelized CO<sub>2</sub>-Rich Fluid Activity along a Subduction Interface in the Paleoproterozoic Wutai Complex, North China Craton by Bin Wang, Wei Tian, Bin Fu, Jia-Qi Fang

    Published 2021-07-01
    “…All of these constraints suggest a channelized CO<sub>2</sub>-rich fluid activity along the sediment–basite interface in a warm Paleoproterozoic subduction zone, which allowed extensive migration and sequestration of volatiles (especially carbon species) beneath the forearc.…”
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  12. 112

    A Long-Lived Accretionary Process during the Amalgamation of the North China Craton: Insights from Neoarchean–Paleoproterozoic Polyphase Magmatism in the Lüliang Complex by Xinyuan Yu, Jian Zhang, Jin Liu, Changqing Yin, Ying Chen, Minjie Guo, Jiahui Qian, Peng Gao, Changquan Cheng

    Published 2023-11-01
    “…There has been a long debate regarding the timing of the final amalgamation of the North China Craton, which is considered to have occurred either during the Neoarchean or Paleoproterozoic era. One major point of contention is whether there existed a long-lived subduction lasting through the Neoarchean to Paleoproterozoic. …”
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    Nature and Evolution of Paleoproterozoic Sn and Rare Metal Albitites from Central Brazil: Constraints Based on Textural, Geochemical, Ar-Ar, and Oxygen Isotopes by Ana Rita F. Sirqueira, Márcia A. Moura, Nilson F. Botelho, T. Kurt Kyser

    Published 2018-09-01
    “…The Sn-P enriched albitites studied in this paper occur in sharp contact with peraluminous granites of the Aurumina Suite (2.0&ndash;2.17 Ga) and schists of the Archean to Paleoproterozoic Ticunzal Formation, as dikes or lenses from late-stage magma of the peraluminous magmatism, probably in granite cupolas. …”
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    Origin of the Paleoproterozoic “Giant Quartz Reef” System in the Bundelkhand Craton, India: Constraints from Fluid Inclusion Microthermometry, Raman Spectroscopy, and Geochemical Modelling by Duttanjali Rout, Mruganka K. Panigrahi, Terrence P. Mernagh, Jayanta K. Pati

    Published 2022-06-01
    “…The BGQR system is a possible result of shallow-crustal sources of fluid and silica and could be visualized as a “Paleoproterozoic geothermal system” in a granitic terrane.…”
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    Paleoproterozoic Pt-Pd Fedorovo-Pansky and Cu-Ni-Cr Monchegorsk Ore Complexes: Age, Metamorphism, and Crustal Contamination According to Sm-Nd Data by Pavel A. Serov

    Published 2021-12-01
    “…This paper continues the Sm-Nd isotope geochronological research carried out at the two largest Paleoproterozoic ore complexes of the northeastern Baltic Shield, i.e., the Cu-Ni-Cr Monchegorsk and the Pt-Pd Fedorovo-Pansky intrusions. …”
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