首页|期刊导航|中国地球化学学报（英文版）|Geochemical Features of the Two Early Paleozoic Ophiolitic Zones and Volcanic Rocks in the Central-Southern Tianshan Region, Xinjiang
中国地球化学学报（英文版）2002，Vol.21Issue(4)：308-321,14.
Geochemical Features of the Two Early Paleozoic Ophiolitic Zones and Volcanic Rocks in the Central-Southern Tianshan Region, Xinjiang
Geochemical Features of the Two Early Paleozoic Ophiolitic Zones and Volcanic Rocks in the Central-Southern Tianshan Region, Xinjiang
摘要
Abstract
This paper deals with the geochemical features of the two Early Paleozoic ophiolite zones in the central-southern Tianshan region and the central Tianshan igneous rock belt between them. Study results suggest that the central Tianshan belt was an Ordovician volcanic arc with an affinity of continental crust, and the Kumux-Hongliuhe ophiolitic zone that is located on the southern margin of central Tianshan has a crustal affinity to back-arc marginal sea. The Aqqikkudug-Weiya ophiolitic zone is an accretionary boundary between the Tuha continental block and the central Tianshan volcanic arc during Late Silurian to Devonian; Ordovician ophiolitic blocks, Silurian flysch sequence and HP metamorphic rock relics are distributed along the Aqqikkudug-Weiya zone. Geochemically, ophiolitic rocks in the Aqqikkudug-Weiya zone have an affinity to oceanic crust, reflecting a tectonic setting of paleo-trench or subduction zone. The Early Carboniferous red molasses were deposited unconformably on the pre-Carboniferous metamorphosed and ductile sheared volcanic and flysch rocks, providing an upper limit age of the central and southern Tianshan belts.关键词
geochemistry/ophiolitic zone/volcanic rock/Tianshan/XinjiangKey words
geochemistry/ophiolitic zone/volcanic rock/Tianshan/Xinjiang引用本文复制引用
郭建,舒良树,夏飞雅克,卢汉斯巴坦,孙树文..Geochemical Features of the Two Early Paleozoic Ophiolitic Zones and Volcanic Rocks in the Central-Southern Tianshan Region, Xinjiang[J].中国地球化学学报（英文版）,2002,21(4):308-321,14.基金项目
The research project supported by the National 973 Scientific Project of China (Grant No. 2001CB409804), the National Natural Science Foundation of China (Grant Nos.49832040,49772151) and the Laboratoire de Geologie Structurale,Orleans University,France. （Grant No. 2001CB409804）
