THE REGIONAL ORE-CONTROLLING CONDITIONS AND PREDICTION OF RESOURCES POTENTIAL OF THE DIAMOND CONCENTRATED DISTRICT IN WAFANGDIAN, LIAONING PROVINCE
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摘要: 瓦房店地区是我国金刚石矿主要矿集区.金伯利岩浆侵入活动主要受超岩石圈郯庐深断裂控制.有利于岩体赋存的部位是基底东西向构造发生继承性活动形成的北东东向断裂.该两组断裂联合控制了区内金伯利岩体群沿北北东方向成排、沿北东东方向呈带的空间分布规律.由于北东东向断裂活动强度的差异，Ⅰ、Ⅱ、Ⅲ号金伯利岩带由北向南呈现了岩体数量渐少、规模渐小、含矿性渐弱的规律性变化.基于此，认为在矿集区以北瓦窝-松树镇一带应具有对称性的1~2条金伯利岩带存在，并预测该区原生金刚石具有较大的资源潜力.另据区内已勘探矿床中含矿岩体剥蚀程度，推测约有3000万克拉金刚石被剥蚀形成砂矿.因此，区内侏罗纪-第四纪地层和第四系松散堆积物中金刚石也具有较丰富的资源潜力.Abstract: Wafangdian area in Liaoning Province is a significant diamond concentrated district in China. The intrusion of kimberlitic magma is controlled by the deep translithospheric Tan-Lu fault. The NEE-trending faults formed by the posthumous movement of E-W-trending structure in the basement are favorable positions for the rock bodies. The combination of both structures controls the distribution of kimberlite rock bodies. Because of the different active strength of the NE fault, the kimberlite belts display a decreasing trend from north to south in the amount, scale and ore content of rock bodies. Based on this, it is concluded that there exists 1 or 2 kimberlite belts in Beiwawo-Songshuzhen. A great potential of primary diamond resources is predicted in this area. In addition, it is estimated about 30 million carat diamond formed in placer by denudation. Therefore, the diamond resources in Jurassic-Quaternary strata are also promising.
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Key words:
- diamond /
- concentrated ore district /
- resources potential /
- Wafangdian of Liaoning Province /
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