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Structural Pattern in Sukma Supracrustal Rocks Near Nagaras, Southern Bastar Craton
Journal of the Geological Society of India, 2006Abstract The Precambrian Sukma supracrustal sequence near Nagaras, southern Bastar Craton, has been mapped as two quartzite lithounits and an intervening undifferentiated unit comprising Mg-Al rich granulite, mafic granulite, amphibolite and hornblende schist The rocks bear imprints of three phases of deformation The structures of the
THAKUR, SS, PATEL, SC, DASGUPTA, S
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Rb–Sr ages of early Archaean supracrustal rocks and Amîtsoq gneisses at Isua
Nature, 1977PREVIOUS field descriptions1–4 and isotopic age determinations5,6 left unresolved several important points about the relationships between the Isua supracrustal rocks and the surrounding Amitsoq gneisses. In scattered areas of comparatively low deformation, field relationships show unequivocally that gneissose granitic veins intrude the supracrustal ...
S. MOORBATH +3 more
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Gondwana Research, 2014
Abstract We report detrital zircon ages for Precambrian and early Palaeozoic metasediments from the Tianshan orogen in Kyrgyzstan, an important component of the Central Asian Orogenic Belt and compare these with published ages from the Chinese Tianshan and the Tarim craton.
Y. Rojas-Agramonte +12 more
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Abstract We report detrital zircon ages for Precambrian and early Palaeozoic metasediments from the Tianshan orogen in Kyrgyzstan, an important component of the Central Asian Orogenic Belt and compare these with published ages from the Chinese Tianshan and the Tarim craton.
Y. Rojas-Agramonte +12 more
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Supracrustal Rocks, Polymetamorphism, and Evolution of the SW Greenland Archean Gneiss Complex
1984The gneiss complex of southern West Greenland contains the world’s oldest well characterized rocks, the ~3800 Ma Isua Supracrustal Sequence of metavolcanic amphibolite, and chemical and clastic metasediment, for which there is no known basement. Stratigraphic relationships suggest a broad similarity to upper portions of some Archean greenstone belts ...
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Geologiska Föreningen i Stockholm Förhandlingar, 1984
Abstract The early Proterozoic supracrustal sequence in the Garpenberg district, south central Sweden, consists mainly of quartz-feldspar gneissses (‘leptites’) and subordinate amphibolites, quartz gneisses, mica schists, skarns and marbles. Stratabound iron and sulfide deposits are intercalated within this sequence.
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Abstract The early Proterozoic supracrustal sequence in the Garpenberg district, south central Sweden, consists mainly of quartz-feldspar gneissses (‘leptites’) and subordinate amphibolites, quartz gneisses, mica schists, skarns and marbles. Stratabound iron and sulfide deposits are intercalated within this sequence.
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The Journal of Geology, 1986
A revision of previous models of Proterozoic crustal accretion in the southwestern U.S. is presented, based on the more extensive data now available. Five Early Proterozoic predominantly volcanic supracrustal terranes are recognized, with ages of 1760-1800 Ma, 1730-1740 Ma, 1720 Ma, 1680-1700 Ma, and 1650 Ma. In some areas they are overlain by a sixth,
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A revision of previous models of Proterozoic crustal accretion in the southwestern U.S. is presented, based on the more extensive data now available. Five Early Proterozoic predominantly volcanic supracrustal terranes are recognized, with ages of 1760-1800 Ma, 1730-1740 Ma, 1720 Ma, 1680-1700 Ma, and 1650 Ma. In some areas they are overlain by a sixth,
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A review on the research progress of the Early Precambrian supracrustal rocks in the Jiaobei Massif
Acta Petrologica Sinica, 2023Lei ZHAO +4 more
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