| 王治华.云南祥云马厂箐富碱斑岩体的地球化学特征[J].地质与勘探,2009,45(4):343-351 |
| 云南祥云马厂箐富碱斑岩体的地球化学特征 |
| Geochemistry of the Machangqing Alkaline鄄rich Porphyry in Xiangyun, Yunnan Province |
| 投稿时间：2008-12-24 修订日期：2009-06-01 |
| DOI： |
| 中文关键词: 富碱侵入岩 地球化学特征 构造环境 原始地幔 云南祥云马厂箐 |
| 英文关键词: geochemistry, Alkaline鄄rich intrusive, tectonics, magma, mantle, crust, Machangqing, Xiangyun Yunnan |
| 基金项目:“十一五冶国家攻关项目(编号:2006BAB01B10)和武警黄金指挥部专项基金资助项目(编号: HJ07-02)联合资助。 |
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| 中文摘要: |
| [摘要]云南祥云马厂箐岩体是马厂箐铜钼矿的主要赋矿围岩,处于扬子板块西缘与北西向的金
沙江—哀牢山深大断裂带东侧交汇部位,属于哀牢山—金沙江富碱侵入岩带的组成部分。马厂箐岩体
主要为花岗斑岩、二长斑岩和正长斑岩。岩石富集大离子亲石元素(Rb、Sr、Ba、Th 和U) 和轻稀土元素
(LREE)、相对亏损高场强元素(Ta、Nb 和Ti), 且Ta、Nb 和Ti 具“TNT冶负异常; LREE/ HREE 值为8郾04
~23郾99,啄Eu 值为0郾72 ~0郾88,负Eu 异常不明显。岩石的La/ Yb 和(La/ Yb)N 比值高, LR/ HR、La/ Sm
和Ce/ Yb 变化较大。岩体的岩浆起源于壳—幔物质混合的一种所谓EM域型富集地幔源;其壳幔混合
特征,主要是俯冲进入上地幔的地壳物质与地幔物质发生了源区混合作用的结果;形成于碰撞后的板内
构造环境。 |
| 英文摘要: |
| Abstract:Located at the joint of western margin of the Yangtz plate and eastern side of NW鄄trending Ailaoshan鄄Jinshajiang major fault, the Machan鄄
gqing intrusive body, being part of the alkaline鄄rich intrusion belt of Ailaoshan鄄Jinshajiang, is main host rock of the Machangqing copper鄄molybdenum de鄄
posit The Machangqing intrusive complex mainly consists of granite porphyry, monzonite porphyry and syenite鄄porphyry. The rocks are rich in large ion
lithophile elements such as Rb、Sr、Ba、Th and U and light rare earth elements, depleted in Ta、Nb and Ti, with “TNT冶negative anomaly. The values of
LREE/ HREE range between 8. 04 and 23. 99,啄Eu from 0. 72 to 0. 88,without obvious negative Eu anormaly;The magma of the rockbody derives from the
mixture of crust鄄mantle, as being called EM域鄄type. The intrusive shows the characteristics of crust鄄mantle mixture, resulting from mixing in the mantle
source with the crust material within the subduction zone and formed in a post鄄collisional intra鄄plate. |
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