Geochronology and geochemistry of late Paleozoic magmatic rocks in the Yinwaxia area, Beishan: Implications for rift magmatism in the southern Central Asian Orogenic Belt
作者: Rongguo ZhengTairan WuWen ZhangQingpeng MengZhaoyu Zhang
作者单位: 1MOE Key Laboratory of Orogenic Belts and Crustal Evolution, School of Earth and Space Sciences, Peking University, Beijing 100871, China
2Institute of Geology, Chinese Academy of Geological Sciences, Beijing 100037, China
刊名: Journal of Asian Earth Sciences, 2014, Vol.91 , pp.39-55
来源数据库: Elsevier Journal
DOI: 10.1016/j.jseaes.2014.04.022
关键词: BeishanMafic rocksSHRIMPSr–Nd isotopeContinental riftCentral Asian Orogenic Belt
英文摘要: Abstract(#br)Mafic–ultramafic rocks are distributed widely in the Beishan rift, which is located in the southern Beishan, central southern Central Asian Orogenic Belt. The Yinwaxia study area is located in eastern Beishan rift, where mafic–ultramafic rocks occur along major faults. The zircon SHRIMP U–Pb age obtained of a gabbro is 281±11Ma, and the age of the basalt is constrained by the youngest xenocrystal with an age of 265Ma, which substantiate that these mafic rocks formed in Permian. Basalts and gabbros exhibit similar geochemical characteristics including: high SiO 2 , total Fe 2 O 3 and TiO 2 contents; low MgO contents and Mg# values; and tholeiitic characteristics. Yinwaxia mafic rocks have relatively...
全文获取路径: Elsevier  (合作)
影响因子:2.379 (2012)