| 沙坪沟钼矿区橄榄角闪石岩岩石成因——矿物学特征约束 |
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| 引用本文： | 王莹,谢玉玲,吴皓然,钟日晨,梁培,王爱国.沙坪沟钼矿区橄榄角闪石岩岩石成因——矿物学特征约束[J].岩石矿物学杂志,2019,38(2):191-208. |
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| 作者姓名： | 王莹 谢玉玲 吴皓然 钟日晨 梁培 王爱国 |
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| 作者单位： | 北京科技大学土木与资源工程学院;南京地质矿产研究所 |
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| 基金项目： | 国土资源部公益性行业基金项目（201011011）；中国地质调查局资助项目（2014-01-020-010） |
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| 摘 要： | 对位于秦岭-大别造山带的沙坪沟钼矿矿区出露的橄榄角闪石岩开展了系统的岩石学、岩相学及电子探针原位分析,厘定了其成岩物理化学条件,并探讨了岩石成因及形成的构造环境。橄榄角闪石岩主要造岩矿物为橄榄石、角闪石、金云母和辉石;副矿物为磷灰石、铬铁尖晶石、镁铁尖晶石、磁铁矿、磁黄铁矿、镍黄铁矿等。电子探针原位分析结果显示,橄榄石属于贵橄榄石系列,角闪石主要是韭闪石,辉石为透辉石,云母为金云母。造岩矿物结晶顺序为橄榄石-辉石-角闪石,结晶温度介于1 111. 64～1 223. 30℃之间,形成压力为350～740 MPa,形成于较高的氧逸度环境(角闪石结晶时的氧逸度范围为NNO+0. 59～NNO+2. 27)。角闪石和金云母的矿物学特征显示它们均是与幔源岩浆作用相关的原生矿物,表明该套基性-超基性岩与幔源岩浆作用有关。综合分析认为,在大别造山带中生代地壳减薄的伸展构造背景下,该橄榄角闪石岩母岩浆源于地幔,是经过地幔7. 92%部分熔融的玄武质岩浆经结晶分异作用形成的幔源岩浆底侵下地壳的产物。
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| 关 键 词： | 橄榄角闪石岩 矿物学特征 岩石成因 沙坪沟 大别造山带 |
| 收稿时间： | 2018/11/20 0:00:00 |
Petrogenesis of olivine hornblende in Shapinggou molybdenum ore district: Constraints from mineralogical characteristics |
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| WANG Ying,XIE Yu-ling,WU Hao-ran,ZHONG Ri-chen,LIANG Pei and WANG Ai-guo.Petrogenesis of olivine hornblende in Shapinggou molybdenum ore district: Constraints from mineralogical characteristics[J].Acta Petrologica Et Mineralogica,2019,38(2):191-208. |
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| Authors: | WANG Ying XIE Yu-ling WU Hao-ran ZHONG Ri-chen LIANG Pei and WANG Ai-guo |
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| Institution: | School of Civil and Environmental Engineering, University of Science and Technology Beijing, Beijing 100083, China,School of Civil and Environmental Engineering, University of Science and Technology Beijing, Beijing 100083, China,School of Civil and Environmental Engineering, University of Science and Technology Beijing, Beijing 100083, China,School of Civil and Environmental Engineering, University of Science and Technology Beijing, Beijing 100083, China,School of Civil and Environmental Engineering, University of Science and Technology Beijing, Beijing 100083, China and Nanjing Institute of Geology and Mineral Resource, Chinese Academy of Geological Sciences, Nanjing 210016, China |
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| Abstract: | |
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| Keywords: | olivine hornblende mineralogical characteristics petrogenesis Shapinggou Dabie orogenic belt |
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