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Bioavailable phosphite in the surface ocean during the Great Oxidation Event. [PDF]
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An integrated approach to unravel the deep-shallow aquifer connectivity in the Eastern Sahara. [PDF]
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The Lower Precambrian in the Structure of Paleozoids of the Subpolar Urals
Doklady Earth Sciences, 2019Rocks of Early Precambrian age have been established in many polymetamorphic complexes of the Urals. However, there is no doubt that only two polymetamorphic complexes (Taratash and Aleksandrovsk), located on the western slope of the Urals, belong to the Archean–Paleoproterozoic sequence.
Yu. I. Pystina +2 more
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Journal of Southeast Asian Earth Sciences, 1990
Abstract The main stages of the geotectonic evolution during the Precambrian of the Siberian platform are older than those in the other blocks of eastern Asia. Upper Proterozoic orogenic stages took place in north China-Korean blocks near the collision boundary with the south China block. Such Upper Proterozoic stages are characteristic for the south
N.L. Dobretsov, V.L. Dook, V.I. Kitsul
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Abstract The main stages of the geotectonic evolution during the Precambrian of the Siberian platform are older than those in the other blocks of eastern Asia. Upper Proterozoic orogenic stages took place in north China-Korean blocks near the collision boundary with the south China block. Such Upper Proterozoic stages are characteristic for the south
N.L. Dobretsov, V.L. Dook, V.I. Kitsul
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Geology of lower Precambrian in Shilka-Olekma interstream area
International Geology Review, 1967The area, an alternation of large synclinoria and anticlinoria, proves to be a direct southwest extension of the early Proterozoic Stanovoy folded zone, a differentiated geosynelinal downwarp with a radical structural unconformity to its deeply metamorphosed Archean base. — IGR Staff.
V.I. Shul'diner, A.F. Ozerskiy
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The discovery of retene in Precambrian and Lower Paleozoic marine formations
Chinese Journal of Geochemistry, 1995Microscopic and SEM observations of thin sections and kerogens and GC-MS analyses of aromatic fractions in sediment extracts and pyrolysis products of kerogens provide strong evidence suggesting that in the Lower Yangtze Valley area the Sinian and Lower Paleozoic carbonate formations of marine facies received no higher plant input, but there was ...
Jiang Naihuang +6 more
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Upper Precambrian–Lower Cambrian biota from the northwest of Argentina
Geological Magazine, 1986AbstractThe principal characters of the biota from Upper Precambrian–Lower Cambrian rocks in the northwest of Argentina are described. It is possible to observe two groups: the trace fossils and the medusoid impressions. At the same time, a regional palaeogeographical analysis is attempted as well as a comparison with outcrops of similar age from the ...
Florencio Gilberto Aceñolaza +1 more
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The Precambrian/Lower Cambrian pluton from Vila Nova
2010The Vila Nova pluton is a small, Pre-Variscan granitic body that intruded rocks of the Central Iberian Zone near the contact with the Ossa Morena Zone and is affected by several shear zones and faults. Its contact metamorphic aureole is constituted by micaschist with porphyroblasts in the outer zone and hornfels in the inner zone.
Reis, A.I.M. +2 more
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Problem of the lower Precambrian “greenstone belts”
International Geology Review, 1980(1980). Problem of the lower Precambrian “greenstone belts”. International Geology Review: Vol. 22, No. 11, pp. 1314-1326.
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Characteristics and evolution of the lower precambrian basement of the North China platform
Journal of Southeast Asian Earth Sciences, 1989Abstract The Lower Precambrian basement of the North China platform is composed of Lower, Upper Archaean and Lower Proterozoic metamorphic complexes. The Lower Archaean metamorphic complex, distributed mainly in the North Border sub-domain, consists of granulite, gneiss, amphibolite and pyroxenite. The metamorphic grade is up to granulite facies. The
Cui Wenyuan +3 more
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