| 成矿专属性与成矿继承性 |
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| 引用本文：.1983.Metallogenic specialization and metallogenic heritage[J].Mineral Deposits,2(1):1~10 |
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| Metallogenic specialization and metallogenic heritage |
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| Abstract:Metallogeny, the regularity of the formation and distribution of ore deposits, involves the study of various factors controlling ore formation, their mutual relationships and their integrated manifestations both in time and in space. Magmatism plays a dominant role in the formation of deposits with magmatic affiliation; it belongs to a geochemical process together with its related metallization. Ores are special rocks which have certain amounts of commercial minerals as their component parts, while ore bodies are geochemical anomalies which can be worked at a profit. The matallogenic specialization of magmatic rocks refers to a specialized relationship between a definite ore formation and a definite magmatism, or a specified correlation which is recognized essentially through the genetic indicators (syngenetic indicators) produced in the course of magmatism and preserved in the magmatic rocks rather than through the postmagmatic indicators (epigenetic indicators). The investigation of the metallogenic specialization of magmatic rocks has evolved from the study of the general regularity to that of the concrete regularity, from the examination of the spatially paragenetic relation to that of the genetically (both in space and in time) paragenetic relation. The approach to the problem started from descriptive petrography, then developed into petrochemistry, and finally into geochemistry. The scope of the metallogenic specialization of magmatic rocks falls into two categories n accordance with their scale: the regional metallogenic specialization and the local one. The former studies chiefly the metallogenic specialization governing various kinds of metals, with the intention of subdividing the metallogenic regions, while the latter aims at the evaluation of the potential ore concentration in various magmatic terrains, that is, at distinguishing the potential ore-bearing terrains from the barren ones as well as at the prediction of the degree of mineralization for potential ore-bearing terrains and the determination of the ore-approaching trend within the terrains. The magmatic and corresponding metallogenic differentiation caused by the evolution of magmatism gives rise to the occurrence of metallogenic specialization and metallogenic series. Owing to the continuity of the regional geochemical characteristics in the geological history, a knowledge about the metallogenic heritage (heredity) has been gained in the light of metallogenic specialization. Metallogenic heritage is found to be a common fact in metallogeny. |
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