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- W2350249529 abstract "Early Cretaceous granitic volcanic-intrusive complex in Xiushanlinchang of northeastern Da Hinggan Mt.consists mainly of rhyolite,rhyolite ignimbrite-trachytic dacite,trachyandesite formed in eruptive cycle stage and adamellite porphyry-geode syenogranite-graphic alkali feldspar syenogranite formed in hypabyssal invasion stage.Later intrusive body filling in the center of collapse caldera formed by volcanic eruption,and the rocks have graphic texture and geode structure without dark alkaline minerals.The age of rhyolite(118.20±1.90 Ma)is similar to the intrusive rocks(116.86~118.3 Ma).Most rocks of the complex belong to alkaline series with high silicon,alkali,aluminum,Ga and HFSEs.The spider diagrams of trace elements of these rocks are close,with Sr,Ba low valley.The rare-earth distribution patterns are similar too,and present slightly LREE enrichment asymmetric right-wing seagull type and medium Eu negative anomaly.The 86Sr/87Sr and 143Nd/144Nd initial values of rhyolite and quartz syenite are also similar.The time-space-source consistency indicates that the complex is aluminum A1-type granite and formed in non-orogenic intraplate extensional tectonic setting under the extension mechanism of lithosphere." @default.
- W2350249529 created "2016-06-24" @default.
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- W2350249529 date "2009-01-01" @default.
- W2350249529 modified "2023-09-25" @default.
- W2350249529 title "Characteristics and petrogenesis of Early Cretaceous Xiushan volcanic—intrusive complex in northeastern Da Hinggan Mt." @default.
- W2350249529 hasPublicationYear "2009" @default.
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