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Petrogenesis And Formative Tectonic Environment Of Dabuxiletu Pluton In The North Part Of Sonid Left Banner, Inner Mongolia

Posted on:2012-11-01Degree:MasterType:Thesis
Country:ChinaCandidate:Y S YangFull Text:PDF
GTID:2120330335470609Subject:Paleontology and stratigraphy
Abstract/Summary:PDF Full Text Request
Dabuxile pluton is located near the northern side of the Erlian-Hegenshan suture belt that is part of the suture zone of the north China plate and the Siberian plate (Xing-Meng orogenic zone). Research on genesis and tectonic environment of Dabuxile pluton could give a deeper understanding on suturing process of the suture line, also can provide evidence for the tectonic evolution of the two plates.Rock types, guide minerals, content and ratios of major and trace elements, characteristic parameters, and related diagrams in metaorphic rocks contain much genetic information, such as magma source region, the formation and evolution of magma, tectonic setting of the output of rock. This paper summarizes combination of rock types of the pluton and characteristics of mineral characteristics, analyzes content, ratios and characteristic parameters of major, REE and trace elements, combined results of rock type discrimination diagrams and related tectonic discrimination diagrams. The result of study show that granodiorite class (Including biotite granodiorite and granodiorite) is I-S transitional type granite, which diagenetic magma may be from subducted oceanic slab and metagreywacke of the overlying continental crust partly melting.Granite class (Including monzogranite, biotite granite and potassium feldspar granite) is S-type granites, with the transitional characteristics from S-type granites to the A-type granite, which diagenetic magma could be from metamorphic pelite. The two types of granites generate from continental arc, and Dabuxile pluton isn't adakitic rocks.From the information of the type of genetic, sourse rock and tectonic environment, we can infer that probably there were island environment or connection of the middle-small plates between the North China plate and the Siberian plate, and they were not completely closed.
Keywords/Search Tags:Sonid Left Banner, Dabuxiletu pluton, Geochemistry feature, genesis of granites, Tectonic environment
PDF Full Text Request
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