首页|Alkaline basalts in the Karamay ophiolitic mélange, southern Central Asian Orogenic Belt

Alkaline basalts in the Karamay ophiolitic mélange, southern Central Asian Orogenic Belt

扫码查看
原文链接
  • NETL
Here we report geological， geochronological， geochemical， and whole-rock Sr-Nd isotopic data for alkaline basalts from the Karamay ophiolitic mélange of West Junggar， southern Central Asian Orogenic Belt (CAOB)。U-Pb analyses of zircon grains from a representative basalt by laser ablation inductively coupled plasma mass spectrometry (LA-ICP-MS) yielded a crystallization age of ca。395 ± 3 Ma， suggesting formation during the Middle Devonian。Geochemically， all the samples bear the signature of ocean island basalt (OIB)， and are characterized by alkaline affinity。The results suggest that all the alkaline basalts were derived from a mantle plume-related source in an intra-oceanic setting。These observations， in combination with previous work， indicate that the alkaline basalts from Karamay can be correlated to Middle Devonian mantle plume magmatism within the Paleo-Asian Ocean。

Ophiolitic mélangeMantle plumeZircon geochronologyGeochemistryWest JunggarCentral Asian Orogenic Belt

Gaoxue Yang、Yongjun Li、M.Santosh、Wenjiao Xiao、Baokai Yang、Lili Tong、Shenglong Zhang

展开 >

Ministry of Education Key Laboratory of Western China's Mineral Resources and Geological Engineering, Xi'an 710054, China

School of Earth Science and Resources, Chang'an University, Xi'an 710054, China

School of Earth Sciences and Resources, China University of Geosciences, Xueyuan Road,Haidian District, Beijing, 100083, China

State Key Laboratory of Lithospheric Evolution, Institute of Geology and Geophysics, Chinese Academy of Sciences, Beijing 100029, China

Xinjiang Research Center for Mineral Resources, Xinjiang Institute of Ecology and Geography,Chinese Academy of Sciences, Urumqi 830011, China

展开 >

China University of Geosciences;National Natural Science Foundation of China;State Key Laboratory of Geologcial Processes and Mineral Resources ;International Workshop on Tethyan Orogenesis and Metallogeny in Asia and Cooperation among Institutions of High

Wuhan(CN)

International Workshop on Tethyan Orogenesis and Metallogeny in Asia and Cooperation among Institutions of Higher Education: Extended Abstract Volume

113-116

2014