地质学报2011，Vol.85Issue(12)：2003-2013,11.DOI:11-1951/P.20111206.1222.007
银根-额济纳旗盆地苏红图坳陷早白垩世火山岩幔源特征
Characteristics of the Early Cretaceous Mantle-Derived Volcanic Rocks in the Suhogntu Depression of Inggen-Ejin Qi Basin
摘要
Abstract
Inggen-Ejin Qi basin is located in the convergent area of Tarim, Kazakhstan, Siberia, and North China plates. In the Early Cretaceous, it underwent strong volcano eruption, forming one suite of mafic and intermediate volcanic rocks. Field and laboratory studies show that the Suhongtu volcanic rocks in the basin belong to high-K basalts, with magma deriving mainly from enriched asthenosphere mantle. There is no crustal material contamination during the rising of magma. Comparative study of geochemical characteristics of volcanic rocks from studied area, Siziwangqi in the northern margin of North China plate, and Yixian Formation in western Liaoning shows that magma source of the Inggen-Ejin Qi Basin covering four different tectonic units has affinity to North China type, or that under the basin there was an independent mantle material-enriched source area which is similar to the North China plate.关键词
银根-额济纳旗盆地/苏红图坳陷/高钾玄武岩Key words
Inggen-Ejin Qi basin/ Suhongtu depression/ basalt引用本文复制引用
钟福平,钟建华,由伟丰..银根-额济纳旗盆地苏红图坳陷早白垩世火山岩幔源特征[J].地质学报,2011,85(12):2003-2013,11.基金项目
本文为"中国西北地区构造-岩相古地理研究与编图"项目(编号YPH08107)和国家重点基础研究发展计划项目(编号2006CB202406)资助的成果. （编号YPH08107）
