Late Paleozoic tectonic amalgamation of northwestern China: Sedimentary record of the northern Tarim, northwestern Turpan, and southern Junggar Basins

Carroll, Alan R.; Graham, Stephan A.; Hendrix, Marc S.; Ying, Danlin; Zhou, Da

doi:10.1130/0016-7606(1995)107<0571:lptaon>2.3.co;2

Cited by 416 publications

(371 citation statements)

References 21 publications

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“…1b; in the Caixiashan ore district on the southern edge of the Eastern Tianshan) is related to subduction of the South Tianshan Ocean (Carroll et al, 1995;Chen et al, 1999;Dong et al, 2011;Han et al, 2011). Diorite dikes in the Kawabulake Group dip steeply and trend mainly NE with a smaller proportion trending NW similar to the previous studies in the Junggar area Zhou et al, 2008).…”

Section: Introductionsupporting

confidence: 72%

Geochronology and geochemistry of the high Mg dioritic dikes in Eastern Tianshan, NW China: Geochemical features, petrogenesis and tectonic implications

Zhang

Chen

et al. 2016

Journal of Asian Earth Sciences

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Section: Introductionsupporting

confidence: 72%

Geochronology and geochemistry of the high Mg dioritic dikes in Eastern Tianshan, NW China: Geochemical features, petrogenesis and tectonic implications

Zhang

Chen

et al. 2016

Journal of Asian Earth Sciences

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“…In the central Asia, the roughly E-W-trending Tianshan is a 400 km-wide orogenic belt formed by the collision between the Siberian and the Tarim blocks during the Late Paleozoic (Coleman, 1989;Sengor et al, 1993;Allen et al, 1993a;Allen et al, 1993b;Carroll et al, 1995;Burtman, 1975;Ren and Chen, 1989;Xiao et al, 1990;He et al, 1994 andLaurentCharvet et al, 2002). The Chinese Tianshan, which is composed of three sub-belts (i.e.…”

Section: Introductionmentioning

confidence: 99%

Geological, geochronological and geochemical features of granulites in the Eastern Tianshan, NW China

Shu

Charvet

et al. 2004

Journal of Asian Earth Sciences

117

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This paper reports new results on the petrology, geochronology and geochemistry of two kmscale high-pressure granulite exposures, namely the Weiya and the Yushugou granulites, that occur in the central and southern Tianshan Paleozoic sub-belts, respectively. Petrological and geochemical results suggest that the Weiya and the Yushugou granulites are different in both the rock types and geological structures. The protolith of the Weiya granulite is basic to intermediate rocks, and that of the Yushugou granulite is basic rocks; the former is distributed as fault-bounded blocks within the Precambrian schist-gneiss, and the latter occurs as thrust slabs in the allochthonous ophiolitic mélange. Observation of deformation structures provides some evidence for two-phase ductile deformation of the Tianshan granulites, characterized by deformed garnet-pyroxene and deformed feldspar-quartz microstructures, corresponding to rheological conditions of the lower crustal level and of the middle crustal level, respectively. The deformation structures also indicate that the Weiya granulite was involved in the late stage retrograde metamorphism forming new amphibole, following a thrusting movement toward the north and ductile deformation of feldspar-quartz grains. The Yushugou granulite underwent strong ductile shearing during the Silurian-Devonian interval. Three stages of metamorphism are recorded by mineral assemblages of the Weiya granulite: M 1 =Pl+Qtz+Bt, M 2 =Cpx+Grt+Pl+Qtz+Atp±Opx, and M 3 =Amp+Ep+Pl+Bt+Qtz, in contrast to a two-stage metamorphic history of the Yushugou granulite: M 1 =Cpx+Grt+Pl±Hyp, M 2 =Amp+Pl+Qtz±Bt. The P-T condition estimates suggest that the Weiya granulite was formed between 910-1025 °C and 1.08-1.12 GPa, and underwent retrograde metamorphism at 650-670 °C, while the peak metamorphism of the Yushugou granulite took place between 800-870 °C and 0.88-1.13 GPa. Geochemical characteristics (major, REE and incompatible elements) of the Weiya and Yushugou granulites indicate that their protoliths were formed in a volcanic arc setting, implying that a late Precambrian active continental margin may have existed in the study area. The Sm-Nd isochron dating for the Weiya granulite suggests that the peak metamorphism occurred at 538±24 Ma, which was likely related to the ancient plate subduction. The 40 Ar/ 39 Ar dating on amphibole grains separated from the Weiya granulite yielded a plateau age of 432±1 Ma for the retrograde metamorphism, which represents an exhumation age, suggesting a significant early Paleozoic tectonothermal event.

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“…The Tarim Block was at the time part of the North China Block following its collision with the Central Asian Orogenic Belt in the Late Carboniferous and was thus incorporated into southwestern part of the Eurasia Plate (Carroll et al 1995;Zhang et al 2013). The Tarim Basin, located in NW China, is the country's largest sedimentary basin.…”

Section: Geological Setting and Previous Studiesmentioning

confidence: 99%

The Triassic to Early Jurassic palynological record of the Tarim Basin, China

Peng

et al. 2017

Palaeobio Palaeoenv

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Late Paleozoic tectonic amalgamation of northwestern China: Sedimentary record of the northern Tarim, northwestern Turpan, and southern Junggar Basins

Cited by 416 publications

References 21 publications

Geochronology and geochemistry of the high Mg dioritic dikes in Eastern Tianshan, NW China: Geochemical features, petrogenesis and tectonic implications

Geochronology and geochemistry of the high Mg dioritic dikes in Eastern Tianshan, NW China: Geochemical features, petrogenesis and tectonic implications

Geological, geochronological and geochemical features of granulites in the Eastern Tianshan, NW China

The Triassic to Early Jurassic palynological record of the Tarim Basin, China

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