The Genetic Type and Tectonic Significance of Hongshishan Basic-Ultrabasic Rocks in Beishan, Gansu Province
详细信息
- 责任者：Wang Xiaohong (Xi’an Center of Geological Survey ; CGS ; Xi’an 710054 ; China) ; Yang Jianguo
- 刊名：Northwestern Geology
- 出版年：2013
- 卷期：46(1)
- 关键词：镁铁质岩 ; mafic rocks ; 超镁铁质岩 ; ultramafics ; 甘肃 ; Gansu Province
- 页码：p.40-55
- 图表：illus., 7 tables, 22 refs.
- 分类号：0801
- issnNo：ISSN1009-6248
- isbnNo：CN61-1149/P
摘要
Basic-ultrabasic rocks of Hongshishan is plate tectonics researchers focus on one of the rock. The genetic type and tectonic setting of Hongshishan basic-ultrabasic rocks are discussed by the rock chemistry,trace elements,rare elements.Studies have shown that rock types based on combination of rock, compared with the output relations, segregation dunite body′s development, the internal flow structure rock, late dykes and chromite mineralization of various types of rock should be akinds of intrusions of magma types; from petrochemistry, trace, rare earth element geochemistry of the rock is reflected in the late Paleozoic (Carboniferous - Permian) period and the Paleo-Asian Ocean closed in the south and eliminate the meantime, the birdchildren Mountain - British andesitic island arc developed on the southern margin of a rift basin, the type of arc magma mantle product, its mechanism or dynamic environment as a back-arc spreading and mantle upwelling of continental rift magmatismmechanism.
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