Forming Conditions and Mechanism for the Fluid Ore-forming System of the Copper,Gold Deposits in the Middle and Lower Reaches of the Yangtze River Area
Forming Conditions and Mechanism for the Fluid Ore-forming System of the Copper,Gold Deposits in the Middle and Lower Reaches of the Yangtze River Area
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发表时间：
2000
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通讯作者：
Zhou Taofa
中科院分区：
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作者：
Zhou Taofa
长江中下游成矿带内有层状矿床和内侵型矿床两大系列的Cu、Au矿床，通过对成矿地球动力学背景的对比研究，本文论述了成矿系统的地质地球化学条件，层状矿床形成于海西期海底喷流沉积作用（SEDEX）.成矿流体主要为岩浆分异生成的岩浆水和少量大气降水。
There are two series of Cu,Au deposits,the stratiformed deposits and the intrusi ve\|related ones in the mineralization belt of the middle and lower reaches of t he Yangtze River area.Comparative studies on forming geodynamic backgrounds,geol ogical and geochemical conditions of the ore\|forming systems have been undertak e n in this paper.The stratiformed deposits were formed in Hercynian period by sub marine exhalation\|sedimentation (SEDEX) of hot brine through the synchronous ba sement faults in a tensional environmental,and the intrusive\|related deposits w ere formed in Yenshanian in a tensional or a transitional period to tensional en vironment during the upper mantle doming by water\|rock interaction and complex transport\|chemical reaction dynamic processes,the ore\|forming fluids were main ly magmatic water from melt\|fluid partition and some meteoric water.