Early Carboniferous collision of the Kalamaili orogenic belt, North   Xinjiang, and its implications: Evidence from molasse deposits

doi:10.1130/B30779.1

CORC > 北京大学 > 地球与空间科学学院

	Early Carboniferous collision of the Kalamaili orogenic belt, North Xinjiang, and its implications: Evidence from molasse deposits
	Zhang, Yuanyuan ; Pe-Piper, Georgia ; Piper, David J. W. ; Guo, Zhaojie
刊名	geological society of america bulletin
	2013
关键词	PALEOZOIC TECTONIC EVOLUTION URAL-MONGOL BELT NW CHINA CENTRAL-ASIA WEST JUNGGAR GEODYNAMIC EVOLUTION FORELAND-BASIN CONTINENTAL GROWTH TIBETAN PLATEAU CRUSTAL GROWTH
DOI	10.1130/B30779.1
英文摘要	The age of the Kalamaili orogenic belt, marking the final amalgamation in East Junggar, North Xinjiang, is significant for the reconstruction of Paleozoic evolution of the southern Central Asian orogenic belt. The Tamugang and Songkarsu Formations of terrestrial molasse in the southeastern part of the Kalamaili belt, shed from the rising Kalamaili orogen, record the orogenic history. The strata consist of proximal conglomerate thinning to distal fine-grained sandstone and mudstone. Poorly sorted conglomerate is composed of dominant pyroclastic rocks with lesser andesitic, granitic, and ophiolitic clasts. Imbricated clasts indicate that the paleocurrents were directed to the present-day southwest to west-southwest. Laser ablation inductively coupled plasma-mass spectrometry (LA-ICP-MS) detrital zircon U-Pb dating of sandstones from both formations confirms that the Yemaquan arc northeast of the Kalamaili orogenic belt was the main source. Two granitic cobbles with zircon sensitive high-resolution ion microprobe (SHRIMP) U-Pb ages of 432.2 +/- 7.8 Ma and 428.1 +/- 6.8 Ma indicate the presence of Silurian magmatism in the Yemaquan arc. The SHRIMP U-Pb age of volcanic rocks from the Batamayineishan Formation, which overlies the molasse on both sides of the Kalamaili belt, is 349.5 +/- 6.0 Ma. The depositional age of molasse is confined to between 343.5 Ma and 345 Ma, based on the 2 sigma range of possible ages for the youngest detrital zircons and the overlying volcanic rocks. Combined with the previously dated plagiogranite and biostratigraphic ages on chert in the Kalamaili ophiolite as the lower age limit, the Kalamaili collision is restricted to 373.8-343.5 Ma, taking into account 2 sigma error, suggesting that the termination of Kala maili paleo-ocean subduction and the final amalgamation in East Junggar occurred before the Visean.; http://gateway.webofknowledge.com/gateway/Gateway.cgi?GWVersion=2&SrcApp=PARTNER_APP&SrcAuth=LinksAMR&KeyUT=WOS:000323270500016&DestLinkType=FullRecord&DestApp=ALL_WOS&UsrCustomerID=8e1609b174ce4e31116a60747a720701 ; Geosciences, Multidisciplinary; SCI(E); EI; 12; ARTICLE; 5-6; 932-944; 125
语种	英语
内容类型	期刊论文
源URL	[http://ir.pku.edu.cn/handle/20.500.11897/311086]
专题	地球与空间科学学院
推荐引用方式 GB/T 7714	Zhang, Yuanyuan,Pe-Piper, Georgia,Piper, David J. W.,et al. Early Carboniferous collision of the Kalamaili orogenic belt, North Xinjiang, and its implications: Evidence from molasse deposits[J]. geological society of america bulletin,2013.
APA	Zhang, Yuanyuan,Pe-Piper, Georgia,Piper, David J. W.,&Guo, Zhaojie.(2013).Early Carboniferous collision of the Kalamaili orogenic belt, North Xinjiang, and its implications: Evidence from molasse deposits.geological society of america bulletin.
MLA	Zhang, Yuanyuan,et al."Early Carboniferous collision of the Kalamaili orogenic belt, North Xinjiang, and its implications: Evidence from molasse deposits".geological society of america bulletin (2013).