首页|期刊导航|中国地球化学学报(英文版)|The Early Paleozoic Tectonic Evolution of the West Kunlun Mountains: New Constraint from the North Kiida Pluton
中国地球化学学报(英文版)2001，Vol.20Issue(1)：12-19,8.
The Early Paleozoic Tectonic Evolution of the West Kunlun Mountains: New Constraint from the North Kiida Pluton
The Early Paleozoic Tectonic Evolution of the West Kunlun Mountains: New Constraint from the North Kiida Pluton
摘要
Abstract
Systematic geochemical studies have been conducted on the North Küda Pluton,Pluton is a potassium-rich (K2O＞5.4wt%) I-type granitic pluton and does not contain any alkaline ferromagnesian mineral. Its relatively high REE, LILE (e. g. Rb, Cs, U and Th) and HFSE (e. g. Nb, Zr) contents make it very akin to the A-type granites. Its heterogeneous Sr (87Sr/86Sri= 0. 7049～0. 7098) and Nd (εNdT = - 1.05～ - 4.04) isotope compositions preclude the possibility of a pure sedimentary or igneous source. Instead, its geochemical compositions suggest that it may be derived from partial melting of a complex source, which consists of igneous and sedimentary rocks. Its intraplate characteristics, together with coeval mafic dykes,indicate an extensional environment at the end of Caledonian. The recognition of the extensional event does not support a continuous subduction-accretion model for the Paleozoic tectonic evolution of the West Kunlun Mountains. On the contrary, it provides new evidence for the twostage island-arc model.关键词
geochemical characteristics/petrogenesis/tectonic implication/North Kuda Plnton/West Kunlun MountainsKey words
geochemical characteristics/petrogenesis/tectonic implication/North Kuda Plnton/West Kunlun Mountains分类
天文与地球科学引用本文复制引用
袁超,周辉,孙敏,李继亮,侯泉林..The Early Paleozoic Tectonic Evolution of the West Kunlun Mountains: New Constraint from the North Kiida Pluton [J].中国地球化学学报(英文版),2001,20(1):12-19,8.基金项目
Jointly granted by the RGC of the University of Hong Kong and the President' s Special Funds of the Guangzhou Institute of Geochemistry, Chinese Academy of Sciences. （）
