Ore-controlling Characteristics and Prospecting Direction for Shear Zone-type Gold Deposits in Jiuling-Qingshui Area,Northeastern Hunan Province
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摘要: 九岭-清水韧性剪切带是湘东北三条区域规模的韧性剪切带之一,黄金洞、万古等金矿床就处于该剪切带上,是典型的受韧性剪切带控制的矿床。武陵-雪峰期的韧性剪切变形不仅形成了导矿通道和容矿空间,也促使冷家溪群含金建造成矿物质的活化迁移;加里东-燕山期形成的NE向深大断裂和伴随的大规模岩浆活动,导致成矿热液再次活化转移并沉淀成矿。韧性剪切构造为金成矿创造了空间条件,而且还通过力学-化学耦合机制参与活化转移成矿各个环节。本文总结了该类矿床的控矿特征和找矿标志,指出了该地区的找矿方向。Abstract: Jiuling-Qingshui ductile shear zone which is located at northeastern Hunan province is a famous gold mineralization-controlling structure,and Huangjindong,Wangu etc.gold deposits are formed in this region.The ductile shear deformation in Wuling-Xuefeng movement not is only build the ore-transmitting channel and ore-bearing spatial,but also activization the gold in Lengjiaxi Group.The NE-trending discordogenic fault and large scale magmatic activities in Caledonian-Yanshanian are vital for the reactivization of ore-forming hydrothermal fluid and sedimentary of ore minerals.Ductile shear structures are not only creating space for the gold mineralization,but also involved in all aspects of remobilization mineralization by mechanical-chemical coupling mechanisms.The ore-controlling characteristics and prospecting criteria for ductile shear-type deposits are summarized here,and prospecting direction of Jiuling-Qingshui area are also provided.
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