| 彭振安.内蒙古北山地区小狐狸山钼矿成矿岩体地球化学特征研究[J].地质与勘探,2010,46(2): |
| 内蒙古北山地区小狐狸山钼矿成矿岩体地球化学特征研究 |
| Geochemical Characteristics of Mo-mineralized Granite in the XiaohulishanDeposit, Beishan Area, Inner Mongolia |
| 投稿时间：2009-11-11 修订日期：2010-03-10 |
| DOI： |
| 中文关键词: 成矿岩体 地球化学特征 小狐狸山钼矿 北山地区 |
| 英文关键词: Mo-mineralized granite, geochemical characteristics, Xiaohulishan molybdenum deposit, Beishan area |
| 基金项目:内蒙古自治区地质矿产勘查开发局《内蒙古自治区内生金属成矿规律及靶区筛选》(ND2007004) |
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| 中文摘要: |
| [摘要]小狐狸山钼矿成矿岩体地球化学特征表现为酸性铝过饱和的钙碱性系列花岗岩,里特曼
指数啄=0郾87 ~ 2郾23,A/ CNK 值为1郾03 ~ 1郾07,稀土元素鄱REE = (97郾21 ~ 246郾57) 伊10-6 ,鄱LREE/ 鄱
HREE=6郾27 ~8郾99,啄Eu=0郾27 ~0郾35,铕强烈亏损。成岩物质以壳源为主,形成于挤压构造环境;成矿
岩体具有高温元素W、Sn、Mo、Bi 高背景含量,且中温元素Cu、Pb、Zn 背景含量偏低;岩体蚀变类型主要
有钾化、钠化和云英岩化;小狐狸山钼矿化主要产在边缘相和过渡相内,集中分布在岩体超覆于地层之
上的南部地段,表明矿化主要与岩浆演化到晚期的热液作用相关联。黑鹰山-雅干成矿带存在着海西中
晚期至印支期的多期成矿作用,海西中晚期对应于古亚洲洋闭合事件,为火山弧构造环境,小狐狸山钼
矿与印支期中酸性岩浆活动有关,对应于古亚洲洋闭合后的板内构造环境。 |
| 英文摘要: |
| Abstract:In geochemistry, the Xiaohulishan Mo-mineralized granite is characterized by acid aluminium supersaturated and calcium-alkalinity with 啄
=0郾87 ~2郾23,A/ CNK = 1郾03 ~1郾07 and 移REE=(97郾21 ~246郾57)伊10-6 ,移LREE/ 移HREE=6郾27 ~8郾99,and 啄Eu=0郾27 ~0郾35郾It is origina鄄
ted from the partial melting of crustal rocks in an compressive tectonic setting with high contents of W, Sn, Mo, Bi and low contents of Cu, Pb, Zn郾Mo
-mineralization occurred in marginal and transitional zones of the southern granite which overlies Ordovician sequences郾The rock alteration can be classi鄄
fied into K-felspar, albite and greisenization types郾Magmatism and related Mo-mineralization occurred in the Hercynian and Indo-China epoch in the
Heiyingshan-Yagan ore belt郾In middle and late Hercynian time, this area was situated in a volcanic arc tectonic setting related with the closure of the
ancient Asian ocean郾And the Mo-mineralization in the Xiaohulishan deposit is associated with the medium-acid magma activity in an intraplate tectonic
setting during the Indo-China period郾 |
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