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| 辽宁弓长岭铁矿区大理岩地质地球化学特征及其成矿意义 | |
| 引用本文： | 李厚民,刘明军,李立兴,杨秀清,陈靖,姚良德,洪学宽,姚通.辽宁弓长岭铁矿区大理岩地质地球化学特征及其成矿意义[J].岩石学报,2012,28(11):3497-3512. |
| 作者姓名： | 李厚民 刘明军 李立兴 杨秀清 陈靖 姚良德 洪学宽 姚通 |
| 作者单位： | 1. 中国地质科学院矿产资源研究所,国土资源部成矿作用与资源评价重点实验室,北京100037 2. 中国地质大学,地质过程与矿产资源国家重点实验室,北京100083 3. 辽宁省冶金地质勘查局地质勘查研究院,鞍山,114002 |
| 基金项目： | 本文受国土资源部公益性行业科研专项经费项目(200911007-15);"973"项目(2012CB416801);地质矿产调查评价项目(1212011120988)联合资助. |
| 摘 要： | 弓长岭铁矿床二矿区西北部发现的含磁铁矿白云质大理岩为与条带状硅铁建造整合产出的原始沉积成因碳酸盐岩.本文对该大理岩及其蚀变岩的主量元素、微量元素、稀土元素及碳氧同位素进行了初步研究.大理岩主要化学组成CaO为30.15％～ 34.32％,MgO为9.86％～11.95％,FeOT为6.76％～15.82％;与平均显生宙石灰岩相比,弓长岭大理岩除Pb、Mn富集外,大离子亲石元素和高场强元素明显亏损;与后太古代平均澳大利亚沉积岩(PAAS)相比,弓长岭大理岩稀土元素总量低,明显正铕异常,铈负异常不明显;弓长岭大理岩δ13CV-PDB为-7.0‰～-6.0‰,Y/Ho比值既不同于海水也不同于陆源碎屑.这些特征显示大理岩形成于缺氧的海洋环境,物质来源与海底喷气热液活动有关.大理岩的沉积表明当时海水的酸碱条件已达中性-弱碱性,有利于铁胶体沉淀成矿.大理岩层不仅易于发生构造变形,而且贫铁矿形成富铁矿时迁出的硅质交代大理岩形成了阳起石岩,同时大理岩还为热液交代形成石榴石岩、绿泥石岩和镁铁闪石岩等蚀变岩提供了镁质. |
| 关 键 词： | 大理岩 主量元素 微量及稀土元素 碳同位素 富铁矿 辽宁弓长岭 |
| 收稿时间： | 2012/6/14 0:00:00 |
| 修稿时间： | 8/2/2012 12:00:00 AM |
Geology and geochemistry of the marble in the Gongchangling iron deposit in Liaoning Province and their metallogenic significance |
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| LI HouMin,LIU MingJun,LI LiXing,YANG XiuQing,CHEN Jing,YAO LiangDe,HONG XueKuan and YAO Tong.Geology and geochemistry of the marble in the Gongchangling iron deposit in Liaoning Province and their metallogenic significance[J].Acta Petrologica Sinica,2012,28(11):3497-3512. | |
| Authors: | LI HouMin LIU MingJun LI LiXing YANG XiuQing CHEN Jing YAO LiangDe HONG XueKuan and YAO Tong |
| Institution: | MLR Key Laboratory of Metallogeny and Mineral Assessment, Institute of Mineral Resources, Chinese Academy of Geological Sciences, Beijing 100037, China;State Key Laboratory of Geological Processes and Mineral Resources, China University of Geosciences, Beijing 100083, China;MLR Key Laboratory of Metallogeny and Mineral Assessment, Institute of Mineral Resources, Chinese Academy of Geological Sciences, Beijing 100037, China;State Key Laboratory of Geological Processes and Mineral Resources, China University of Geosciences, Beijing 100083, China;MLR Key Laboratory of Metallogeny and Mineral Assessment, Institute of Mineral Resources, Chinese Academy of Geological Sciences, Beijing 100037, China;Institute of Geological Exploration, Liaoning Bureau of Metallurgic Geological Exploration, Anshan 114002, China;Institute of Geological Exploration, Liaoning Bureau of Metallurgic Geological Exploration, Anshan 114002, China;MLR Key Laboratory of Metallogeny and Mineral Assessment, Institute of Mineral Resources, Chinese Academy of Geological Sciences, Beijing 100037, China |
| Abstract: | |
| Keywords: | Marble Major elements Trace elements and REEs Carbon isotopes High-grade ores Gongchangling Liaoning |
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