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| 蛇绿岩铬铁矿形成环境和成矿机制 | |
| 引用本文： | 兰朝利,何顺利,李继亮. 蛇绿岩铬铁矿形成环境和成矿机制[J]. 甘肃科学学报, 2006, 18(1): 53-56 |
| 作者姓名： | 兰朝利 何顺利 李继亮 |
| 作者单位： | 1. 石油大学,石油天然气工程学院,北京,102249;中国科学院地质与地球物理研究所,岩石圈构造演化实验室,北京,100029 2. 石油大学,石油天然气工程学院,北京,102249 3. 中国科学院地质与地球物理研究所,岩石圈构造演化实验室,北京,100029 |
| 摘 要： | 对蛇绿岩中所附存铬铁矿的形成环境及其成矿机制做了简略回顾.就豆荚铬铁矿而言,其富铬型铬铁矿形成在岛弧环境,富铝型铬铁矿形成在洋中脊或弧后盆地环境,而富铬富铝型铬铁矿的形成被认为是经历了从洋中脊到到岛弧环境,同时回顾了蛇绿岩铬铁矿可能的3种成矿机制,即堆晶模式、混熔模式和熔融再造模式,并认为查明铬铁矿及其围岩的构造演化和铬铁矿与围岩的地质关系可能才是正确描述铬铁矿形成模式的关键. |
| 关 键 词： | 蛇绿岩 铬铁矿 构造环境 成矿机制 |
| 文章编号： | 1004-0366（2006）01-0053-04 |
| 收稿时间： | 2004-11-02 |
| 修稿时间： | 2004-11-02 |
Tectonic Setting and Metallogenic Mechanism of Ophiolitic Chromites |
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| LAN Chao-li,HE Shun-li,LI Ji-liang. Tectonic Setting and Metallogenic Mechanism of Ophiolitic Chromites[J]. Journal of Gansu Sciences, 2006, 18(1): 53-56 | |
| Authors: | LAN Chao-li HE Shun-li LI Ji-liang |
| Affiliation: | 1. Institute of Oil and Gas Engineering,University of Petroeum, Beijing 102249, China ; 2. Laboratory of Lithospheric and Tectonic Evolution, Institute of Geology and Geologysics, Chinese Academy of Sciences, Beijing 100029, China |
| Abstract: | The tectonic setting and metallogenic mechanism of ophiolitic chromites are reviewed. It is realized that for podiform chromites, the Cr-rich type is generated at the island-arc setting, the Al-rich typy at the mid-ocean ridge or back-arc setting and the Cr-rich and Al-rich typy at the setting through midocean ridge to island-arc. In the meanwhile, three posible metallogenic mechanisms for ophiolitic chromites, inluding Cumulation Model, Melt-mixing Model and Melting and Reconstructiong Model, are reviewed. It is concluded that the tectonic evoution of chromites and their wall rocks and the geological relationshijp between them may be the keys to describe chrmite-forming mode correctly. |
| Keywords: | ophiolite chromite tectonic setting metallogenic mechanism |
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