东昆仑地区中生代熔融、同化、存储和均一（MASH）过程及壳幔岩浆混合

哈西亚图石英闪长岩是东昆仑地区中生代具幔源组分贡献的花岗岩类典型代表,岩体出露于东昆仑中构造带,广泛发育暗色微粒包体。包体为闪长质岩石,并含有一系列岩浆混合成因的证据,如水滴状、长条状塑性流变外形,淬冷边、反向脉等高—中温混合迹象,以及低Mg/（Fe＋Mg）、Na/（Ca＋Na）值等混合成因特征。包体A/CNK值介于0.77~0.87,属准铝质,富Al2O3、Fe2O3、MgO,贫K2O、Na2O,富集大离子亲石元素（Rb、Ba、K等）,同时又具有Ta、Nb、Ti的＂TNT＂负异常,具有俯冲带幔源岩石的成分特点。依据岩石学、地球化学特征并结合同时期大地构造背景,东昆仑晚古生代—早中生代含暗色微...

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Published in地球科学与环境学报 Vol. 37; no. 1; pp. 37 - 45
Main Author 南卡俄吾 贾群子 李文渊 唐玲 李金超 栗亚芝 孔会磊
Format Journal Article
LanguageChinese
Published 长安大学地球科学与资源学院，陕西西安 710054%中国地质调查局西安地质调查中心,陕西西安,710054%中国地质大学 北京 地球科学与资源学院,北京,100083 2015
中国地质调查局西安地质调查中心，陕西西安 710054
Subjects
MASH过程
东昆仑地区
中生代
壳幔作用
岩浆混合
暗色微粒包体
暗色微粒包体
Mesozoic
中生代
壳幔作用
东昆仑地区
East Kunlun region
岩浆混合
MASH process
magma mixing
MASH过程
mafic microgranular enclave
crust-mantle effect
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ISSN1672-6561

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Summary:哈西亚图石英闪长岩是东昆仑地区中生代具幔源组分贡献的花岗岩类典型代表,岩体出露于东昆仑中构造带,广泛发育暗色微粒包体。包体为闪长质岩石,并含有一系列岩浆混合成因的证据,如水滴状、长条状塑性流变外形,淬冷边、反向脉等高—中温混合迹象,以及低Mg/（Fe＋Mg）、Na/（Ca＋Na）值等混合成因特征。包体A/CNK值介于0.77~0.87,属准铝质,富Al2O3、Fe2O3、MgO,贫K2O、Na2O,富集大离子亲石元素（Rb、Ba、K等）,同时又具有Ta、Nb、Ti的＂TNT＂负异常,具有俯冲带幔源岩石的成分特点。依据岩石学、地球化学特征并结合同时期大地构造背景,东昆仑晚古生代—早中生代含暗色微粒包体花岗质岩石是幔源岩浆经历多次熔融、同化、存储和均一（MASH）过程后与壳源岩浆混合的产物。在混合岩浆中,富镁铁质端元是由辉长质岩浆进化而来的闪长质岩浆。
Bibliography:mafic microgranular enclave; MASH process; Mesozoic; crust-mantle effect; magma mixing; East Kunlun region
61-1423/P
Haxiyatu quartz diorite is one of the typical granites with the contribution of Mesozoic mantle-derived component in East Kunlun region.The outcrop of rock mass is located in the middle tectonic belt,and mafic microgranular enclaves develop widely.The enclave is diorite with a series of magma mixing origin evidences,such as water-drop and long strip plasticity rheological shape,high-middle temperature mixed sign including quenching boundary,reverse pulse,etc.,and mixed origin including low values of Mg/（Fe＋Mg）and Na/（Ca＋Na）.The A/CNK value of enclave is 0.77-0.87,belonging to quasi-aluminous;the enclaves are rich in Al2O3 and Fe2O3,MgO,poor in K2 O and Na2O;the enclaves are enriched in large ion lithophile elements（Rb,Ba,K,etc.）,and have the characteristics of＂TNT＂negative anomaly for Ta,Nb and Ti,and the composition of subduction mantle-derived rock.According to the lithological and geochemicalc
ISSN:1672-6561