| 超基性岩矿物化学特征与成矿关系讨论 |
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| 引用本文： | 顾鹏.超基性岩矿物化学特征与成矿关系讨论[J].地球化学,1983(2):170-177. |
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| 作者姓名： | 顾鹏 |
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| 作者单位： | 甘肃省地质局地质研究所 |
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| 摘 要： | The most productive chromite ore deposits are formed by crystallizing from chromite-ore magmas under definite physico-chemical conditions. The formation of chromite ore is controlled mainly by the degree of differentiation of ultrabasic magma. How to diagnose uitrabasic magmatie differentiation is key to the understanding of the mechanism of formation of chromite ore. It is considered that chromite ore is derived from ulttabasic rocks. The rock-forming minerals include olivine, pyroxene and spinel. The minerals are well homomorphous minerals. The contents of major chemical elements in these minerals show little variation. On the contrary in those ultrubasie rocks which show no association with chromite ore deposits the contents of the elements vary over a wide range. Abundant data available.indicate that chromite ore deposits arc derived from chrore.ire-ore magmas resulting from the transport and accumulation of chromic elements. Since the transport and accumulation of chromic elements follows the statistical law,we must study the mechanism of formation of ehromite ore from the statistical point of view. If chromite ore is formed from spinel under the action of gravitation o.r other dynamic actions, we must elucidate the mechanism of formation of chromite ore from the dynamic viewpoint.
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| 关 键 词： | 岩石化学 超基性岩 成矿关系 热力学 |
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