| 小兴安岭石林林场A型花岗岩地球化学特征及构造环境 |
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| 引用本文： | 李超,孙国胜,杨乃峰,孙珍军,杜美艳,敖东.小兴安岭石林林场A型花岗岩地球化学特征及构造环境[J].世界地质,2013,32(1):1-7. |
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| 作者姓名： | 李超 孙国胜 杨乃峰 孙珍军 杜美艳 敖东 |
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| 作者单位： | 1． 吉林大学地球科学学院，长春130061; 2． 黑龙江省矿业集团有限责任公司，哈尔滨150036 |
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| 摘 要： | 根据岩石学及地球化学等特征,对小兴安岭北部石林林场A型花岗岩进行了构造环境研究。石林林场A型花岗岩为高钾钙碱性系列、过铝质岩石,富集大离子亲石元素Rb、Th、U、La、Ce和轻稀土元素。岩石化学成分特点及Na2O--K2O图解表明,花岗岩为铝质A型花岗岩。通过对Nb--Y构造环境判别图解、R1--10 000 Ga/Al判别图解及构造环境讨论表明,石林林场花岗岩形成于陆内拉张环境。
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| 关 键 词： | 铝质A 型花岗岩 地球化学特征 构造环境 小兴安岭 |
Geochemical characteristics and tectonic setting of A-type granite in Shilin Forestry Center in Xiaoxing'anling |
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| LI Chao
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SUN Guo-sheng
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YANG Nai-feng
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SUN Zhen-jun
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DU Mei-yan
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AO Dong.Geochemical characteristics and tectonic setting of A-type granite in Shilin Forestry Center in Xiaoxing'anling[J].World Geology,2013,32(1):1-7. |
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| Authors: | LI Chao SUN Guo-sheng YANG Nai-feng SUN Zhen-jun DU Mei-yan AO Dong |
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| Institution: | 1． College of Earth Sciences，Jilin University，Changchun 130061，China; 2． Heilongjiang Mining Group Co． Ltd． ，Harbin 150036，China |
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| Abstract: | The petrology and geochemistry of A --type granites in Shilin Forestry Center in northern Xiaoxing'anling showed that: the A--type granites in the Center belong to high --K calc-alkaline series and high aluminum rocks，and are rich in large ion lithophile elements ( Rb，Th，U，La and Ce) and light rare earth elements in contents． The petrochemical characters and Na2O--K2O diagram showed that the granite in Shilin Forestry Center was aluminous A--type granite． The discriminating diagrams of Nb --Y and R1 --10000Ga /Al tectonic setting show that the granites were formed in intra-continental extensional environment． |
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| Keywords: | aluminous A-type granite geochemical characteristics tectonic environment Xiaoxinganling |
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