Limited expression of the Paleoproterozoic Oklo natural nuclear reactor phenomenon in the aftermath of a widespread deoxygenation event ~2.11–2.06 billion years ago
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DOI: 10.1016/j.chemgeo.2021.120315
Abstract: Abstract The only known case of natural fission reactors is hosted by high-grade uranium (U) deposits at Oklo-Okelobondo and Bangombe in sandstones of the ~2.1 Ga Francevillian Group, Gabon. However, the geochemical influence of the depositional… read more here.
Keywords: paleoproterozoic; reactor phenomenon; phenomenon; natural nuclear ... See more keywords
The Yunmengshan iron formation at the end of the Paleoproterozoic era
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DOI: 10.1016/j.clay.2020.105888
Abstract: Abstract Precambrian iron formations (IF) carry rich information on the interplay between the geosphere and the early biospheres. Here, we report mineralogical and petrologic characterizations of the Yunmengshan IF deposited at ~1.7 Ga, the transition… read more here.
Keywords: iron; paleoproterozoic; yunmengshan iron; iron formation ... See more keywords
Aspects of the Archean-Proterozoic transition: How the great Huronian Glacial Event was initiated by rift-related uplift and terminated at the rift-drift transition during break-up of Lauroscandia
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DOI: 10.1016/j.earscirev.2018.12.013
Abstract: Abstract The Archean-Proterozoic transition was among the most important in geological history for it includes evidence of establishment of ‘modern-style’ plate tectonics, unprecedented paleoclimatic upheavals, and oxygenation of the atmosphere. The early Paleoproterozoic sedimentary record… read more here.
Keywords: paleoproterozoic; transition; archean proterozoic; rift ... See more keywords
Paleoproterozoic and Triassic metamorphic events in the Jiaobei Terrane, Jiao-Liao-Ji Belt, China: Hidden clues on multiple metamorphism and new insights into complex tectonic evolution
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DOI: 10.1016/j.gr.2018.04.008
Abstract: Abstract The Laixi Complex located on the margin between the Jiao-Liao-Ji orogenic belt (JLJB) and the Sulu ultra-high pressure (UHP) belt preserves the records of complex tectonic evolution of both belts from the Paleoproterozoic to… read more here.
Keywords: evolution; paleoproterozoic; metamorphism; laixi complex ... See more keywords
Paleoproterozoic (2.0–1.97 Ga) subduction-related magmatism on the north–central margin of the Yeongnam Massif, Korean Peninsula, and its tectonic implications for reconstruction of the Columbia supercontinent
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DOI: 10.1016/j.gr.2019.02.002
Abstract: Abstract The Muju area, located on the north–central margin of the Yeongnam Massif, mainly consists of Precambrian orthogneisses (granitic, leucogranitic, augen and dioritic gneisses) with minor migmatite. Zircon U–Pb dating indicates that the protoliths of… read more here.
Keywords: yeongnam massif; paleoproterozoic; margin yeongnam; yeongnam ... See more keywords
Petrogenesis and tectonic implications of the late Paleoproterozoic A-type rhyolites at the southwestern North China Craton
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DOI: 10.1016/j.lithos.2021.106095
Abstract: Abstract The late Paleoproterozoic A-type granitoids are important for constraining of the lithotectonic and geodynamic processed involved in the creation of continental crust. The newly identified late Paleoproterozoic felsic extrusive rocks from the southwestern margin… read more here.
Keywords: paleoproterozoic; china craton; north china; paleoproterozoic type ... See more keywords
U–Pb ages and Hf-isotope data of detrital zircons from the late Neoarchean-Paleoproterozoic Minas Basin, SE Brazil
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DOI: 10.1016/j.precamres.2017.01.026
Abstract: Abstract Because of its world-class iron ore deposits and promising Au and U mineralizations, the late Neoarchean to Paleoproterozoic Minas Basin (Minas Supergroup, SE of Brazil) is one of the best-studied basins in South America.… read more here.
Keywords: minas basin; neoarchean paleoproterozoic; age; paleoproterozoic ... See more keywords
A Paleoproterozoic ophiolitic mélange, Yangtze craton, South China: Evidence for Paleoproterozoic suturing and microcontinent amalgamation
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DOI: 10.1016/j.precamres.2017.03.004
Abstract: Abstract We document for the first time the presence of a Paleoproterozoic ophiolitic melange in the Archean–Paleoproterozoic Kongling Complex in the northern Huangling Dome, Yangtze craton, South China. Detailed field mapping, petrographic, geochronological and geochemical… read more here.
Keywords: craton south; paleoproterozoic; yangtze craton; paleoproterozoic ophiolitic ... See more keywords
Paleoproterozoic S-type granites from the Helanshan Complex in Inner Mongolia: Constraints on the provenance and the Paleoproterozoic evolution of the Khondalite Belt, North China Craton
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DOI: 10.1016/j.precamres.2017.07.009
Abstract: Abstract The Khondalite Belt is a Paleoproterozoic tectonic belt in the Western Block of the North China Craton. It consists mainly of high-grade metamorphosed Al-rich sedimentary rocks, also named as the ‘Khondalite Series’. The vast… read more here.
Keywords: khondalite belt; paleoproterozoic; type granites; provenance ... See more keywords
Paleoproterozoic tectonic evolution of the Yangtze Block: New evidence from ca. 2.36 to 2.22 Ga magmatism and 1.96 Ga metamorphism in the Cuoke complex, SW China
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DOI: 10.1016/j.precamres.2019.105525
Abstract: Abstract The infrequent early Paleoproterozoic rocks are essential for investigating the early evolution of the Yangtze Block and its reconstruction in the global supercontinent. Here, we carried out an integrated study of petrology, whole-rock geochemistry,… read more here.
Keywords: yangtze block; magmatism; paleoproterozoic; metamorphism ... See more keywords
Rifting of the Kaapvaal Craton during the early Paleoproterozoic: Evidence from magmatism in the western Transvaal subbasin (South Africa)
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DOI: 10.1016/j.precamres.2020.105687
Abstract: Abstract The Neoarchean to Paleoproterozoic (ca. 2.65–2.06 Ga) Transvaal Supergroup of the Kaapvaal Craton is dominated by clastic and chemical sedimentary rocks, with few strata-bound igneous units. Two ca. 2.2 Ga igneous units in its upper part… read more here.
Keywords: paleoproterozoic; craton; igneous units; transvaal subbasin ... See more keywords