典型文献
Geochemical and Boron Isotopic Evidence that Tourmaline Records Country Rock Assimilation of Leucogranites in the Himalayan Orogen
文献摘要：
Tourmaline geochemical and boron (B) isotopic compositions in two-mica granites (TMG),tourmaline-bearing leucogranites (Tou-LG),tourmalites and metapelites from the Gyirong-Malashan areas of the Himalayan orogen provide evidence for country rock assimilation during the intrusion of Himalayan leucogranite.The schorls in Gyirong leucogranitic plutons show low contents of MgO (0.238％-1.160％) and δ11B values (-12.1‰--11.2‰),while dravites gathered in the contact zone between the leucogranitic veins and metapelites show high contents of MgO (4.815％-6.755％) and δ11B values (-10.7‰--9.3‰).This geochemical and isotopic variation of tourmalines can also be identified in the Malashan gneiss dome.As a result,three types of tourmaline were identified in the Himalayan orogen:(1) Tou-Ⅰ in the TMG and Tou-LG,which is the most common tourmaline type of schorl;(2) Tou-Ⅱ (dravite and high-Mg schorl) in the Tou-LG and tourmalite at the margins of the leucogranite;and (3) Tou-Ⅲ (mainly dravite,with minor high-Mg schorl) in metapelites of the High Himalayan Crystalline Sequence.The lenses and veins of Tou-LG may have experienced metasomatism and assimilation as a result of interaction with the High Himalayan Crystalline Sequence metasedimentary country rocks,which can be traced by the geochemical and isotopic characteristics of the tourmaline therein.
文献关键词：
中图分类号：
作者姓名：
HU Guyue;GAO Li'e;ZENG Lingsen;LI Yike
作者机构：
MNR Key Laboratory of Metallogeny and Mineral Assessment,Institute of Mineral Resources,Chinese Academy of Geological Sciences,Beijing 100037,China;MNR Key Laboratory of Deep-Earth Dynamics,Institute of Geology,Chinese Academy of Geological Sciences,Beijing 100037,China
文献出处：
引用格式：
[1]HU Guyue;GAO Li'e;ZENG Lingsen;LI Yike-.Geochemical and Boron Isotopic Evidence that Tourmaline Records Country Rock Assimilation of Leucogranites in the Himalayan Orogen)[J].地质学报（英文版）,2022(01):123-134
A类：
Tourmaline,Leucogranites,Tou,tourmalites,metapelites,Gyirong,Malashan,leucogranite,schorls,leucogranitic,dravites,tourmalines,schorl,dravite,tourmalite
B类：
Geochemical,Boron,Isotopic,Evidence,that,Records,Country,Rock,Assimilation,Himalayan,Orogen,geochemical,boron,isotopic,compositions,two,TMG,bearing,leucogranites,LG,from,areas,orogen,provide,evidence,country,assimilation,during,intrusion,plutons,show,low,contents,MgO,11B,values,while,gathered,contact,zone,between,veins,high,This,variation,can,also,identified,gneiss,dome,result,three,types,were,which,most,common,margins,mainly,minor,High,Crystalline,Sequence,lenses,may,have,experienced,metasomatism,interaction,metasedimentary,rocks,traced,by,characteristics,therein
AB值：
0.378052
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