| 内蒙古喀喇沁早中生代闪长岩的岩石学,地球化学及其成因 |
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| 引用本文： | 韩庆军,邵济安.内蒙古喀喇沁早中生代闪长岩的岩石学,地球化学及其成因[J].岩石学报,2000,16(3):385-391. |
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| 作者姓名： | 韩庆军 邵济安 |
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| 作者单位： | 1. 中国科学院地质与地球物理研究所,北京,100029
2. 北京大学,北京,100871 |
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| 基金项目： | 国家自然科学基金 (项目号 :49672 15 6和 49872 0 79)资助项目 |
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| 摘 要： | 本文研究了内蒙古喀喇漏沁地区含镁铁质－超镁铁质堆晶岩和基性麻粒岩捕虏体的闪长岩的同位素年代学、岩石学及地球化学,得到以下几点认识：（１）闪长岩全岩和单矿物Ｋ－Ａｒ年龄为２１９～２２３Ｍａ。（２）闪长岩与其中的堆晶岩和基性麻粒岩捕虏无成因联系;（３）各类闪长岩可能是太古宙斜长角闪岩高度部分熔融的产物;（４）闪长岩的形成与研究区早中生代的底侵作用有关,反映了伸展构造背景。
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| 关 键 词： | 喀喇沁 早中生代 闪长岩 地球化学 岩石学 |
Petrology,
geochemistry and petrogenesis of Early Mesozoic diorites in Harqin area, Inner-Mongolia |
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| Han Qingjun,Shao Jian and Zhou Rui.. Institure of Geology and Geophysics,Chinese Academy of Sciences,Beijing,Chin,. Peking University,Beijing,China..Petrology,
geochemistry and petrogenesis of Early Mesozoic diorites in Harqin area, Inner-Mongolia[J].Acta Petrologica Sinica,2000,16(3):385-391. |
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| Authors: | Han Qingjun Shao Jian and Zhou Rui Institure of Geology and Geophysics Chinese Academy of Sciences Beijing Chin Peking University Beijing China |
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| Abstract: | Isotopic geochronology, petrology and
geochemistry of diorites containing mafic-ultramafic cumulate and basic granulite
xenoliths from Harqin area of Inner-Mongolia have been studied. The results suggest that
(1) K-Ar datings of whole rock and single mineral of diorites give ages of 218～223 Ma; (2) diorites have no
genetic correlation with cumulate and granulite xenoliths; (3) these diorites in different
lithologies are probably products of highly partial melting of Archean amphibolite; (4)
the Early Mesozoic underplating lead to the formation of diorites, reflecting an
extensional tectonic setting. |
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| Keywords: | Harqin Early Mesozoic Diorite Geochemistry |
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