典型文献
Chronological and Geochemical Study of the Cenozoic Potassic Felsic Igneous Rocks in Western Yunnan,SE Tibet:Implications for their Tectonic Mechanisms
文献摘要：
Whether there is a relationship between widespread Cenozoic igneous rocks and the activated Ailao Shan-Red River shear zone(ASRR)in western Yunnan,SE Tibet,remains highly controversial.New geochronological,and geochemical data derived from Cenozoic igneous rocks both within and far from the ASRR offers answers.Although these coeval felsic rocks(36.9-33.5 Ma)are enriched in large-ion lithophile elements relative to high fiield strength elements,they also display some special geochemical features,such as high Y and Yb values of syenitic porphyries,which contrast with the high Sr and low Y contents of monzoporphyries and granitic porphyries.The syenitic porphyries exhibit geochemical characteristics similar to those of coeval mafiic magmas,e.g.,high K2O,Y,and Yb contents,indicating that the former were probably generated by fractional crystallization of the latter.However,the high Sr/Y(56.1-109)monzoporphyries and granitic porphyries,combined with their low MgO,and Cr(or Ni)contents,suggest that they were mainly derived from partial melting of a thickened mafic lower crust.Given that these Cenozoic magmatic events exhibiting planar distributions occurred outside of the activation of the ASRR(31-20 Ma),then they were not controlled by the latter.Instead,they were tied to convective removal of a thickened lower lithospheric mantle in western Yunnan during the Paleogene.
文献关键词：
中图分类号：
作者姓名：
TANG Wanli;CHEN Jianlin;TAN Rongyu
作者机构：
State Key Laboratory of Isotope Geochemistry,Guangzhou Institute of Geochemistry,Chinese Academy of Sciences,Guangzhou 510640,China;College of Earth and Planetary Sciences,University of Chinese Academy of Sciences,Beijing 100083,China;CAS Center for Excellence in Deep Earth Science,Guangzhou 510640,China
文献出处：
引用格式：
[1]TANG Wanli;CHEN Jianlin;TAN Rongyu-.Chronological and Geochemical Study of the Cenozoic Potassic Felsic Igneous Rocks in Western Yunnan,SE Tibet:Implications for their Tectonic Mechanisms)[J].地质学报（英文版）,2022(03):904-918
A类：
Chronological,Potassic,Felsic,ASRR,fiield,syenitic,monzoporphyries,mafiic
B类：
Geochemical,Study,Cenozoic,Igneous,Rocks,Yunnan,SE,Tibet,Implications,their,Tectonic,Mechanisms,Whether,there,relationship,between,widespread,igneous,rocks,activated,Ailao,Shan,Red,River,shear,zone,western,remains,highly,controversial,New,geochronological,geochemical,data,derived,from,both,within,far,offers,answers,Although,these,coeval,felsic,Ma,are,enriched,large,lithophile,elements,relative,strength,they,also,display,some,special,features,such,Yb,values,which,contrast,Sr,contents,granitic,characteristics,similar,those,magmas,K2O,indicating,that,former,were,probably,generated,by,fractional,crystallization,latter,However,combined,MgO,suggest,mainly,partial,melting,thickened,mafic,lower,crust,Given,magmatic,events,exhibiting,planar,distributions,occurred,outside,activation,then,not,controlled,Instead,tied,convective,removal,lithospheric,mantle,during,Paleogene
AB值：
0.551574
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