西藏康托地区早—中侏罗世木嘎岗日群沉积盆地分析及构造演化研究

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Abstract The early-middle Jurassic Mugagangri Group widespread in the middle-western section of the Bangongco-Nujinag junction zone, the rock association seems like accordance from a macroscopic perspective. However, the chronostratigraphy is inconsistent in different areas since the establishment of Mugagangri Group; it is a tectonic melange with disorder sequence and complex composition. Taking the sedimentary basins as a whole, and according to features of sedimentary assemblage, sedimentary sequence, rock geochemistry, lithofacies, provenance, detrital model, basin classification, and tectonic evolution about the Mugagangri Group, the geodynamic background had been studied. We proposed that the early-middle Jurassic sedimentary environment of Kangtuo area corresponded to abyssal-bathyal facies of meso Tethys ocean basin; it was a suit of flysch clastic deposits of deepwater in fore-arc basin of passive continental margin. The tectonic evolution was divided into basin spreading period (basin spreading stage), and basin subduction period (southward subduction stage, bilateral subduction stage), and the Mugagangri Group can be divided into three lithology groups.

Key words： Bangongco-Nujiang junction zone Kangtuo area Mugagangri Group sedimentary basin tectonic evolution

Received: 23 April 2015

:	P534.52
	P542

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	Articles by authors
	DENG Jin-huo
	L Xin
	ZHONG Jing-jun
	WAN Chuan
	YUAN Zhen-guo
	DU Chang-fa
	ZHONG Wen

Cite this article:

DENG Jin-huo,L Xin,ZHONG Jing-jun, et al. Sedimentary Basin Analysis and Tectonic Evolution of the Early-Middle Jurassic Mugagangri Group in Kangtuo Area, Tibet[J]. , 2015, 2(6): 34-41.

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http://114.242.223.217/EN/ OR http://114.242.223.217/EN/Y2015/V2/I6/34

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