Objective The Bayingou ophiolitic Tianshan Mountains of melange is located in Northerm the southern Central Asian Orogenic Belt which is the largest accretionary oroger among the European, Siberian, Tarim and North Chine cratons. The Bayingou ophiolitic melange provide a critical geological record for unraveling regional tectonic histor） and testing different tectonic models. However, previous studies were mainly concentrated on geochronology, rock combination, structural feature and geochemistry ol ophiolite, with little attention to oceanic island basalts in the Bayingou ophiolitic melange. Therefore, in this study, we focus on pillow basalts from ophiolitic melange.
YANG GaoxueLI YongjunTONG LiliLI GanyuSHEN RuiLI Zhao
Nb-enriched arc basalts,an extremely special rock type,were formed in a specific tectonic setting,which have attracted much attention in recent years.Although Nbenriched basalts in the Yining Block were interpreted as arc-affinity basalts,some geologists suggested that they should be Nb-enriched continental basalts and not arcrelated.Recently,the Nb-enriched arc basalts have been first identified from the Dahalajunshan Formation in southern Wusunshan,Yining.
LI GanyuLI YongjunYANG GaoxueWANG RanLI ZhaoSHEN RuiWANG ZuopengWANG Zhenyu
Objective West Junggar,which is located in the southwestern segment of the Central Asian Orogenic Belt(CAOB),is an important tectonic unit in the evaluation and examination of the largest continental accretion on Earth,playing a significant role in understanding the tectonic evolution and crustal growth within the orogenic belt(Xiao and Santosh,2014).However,no precise record of ancient continental blocks is found in West Junggar,owing to the extensive coverage and later structural reconstructions.
