| 辽宁瓦房店金刚石矿田金伯利岩地质特征 |
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| 关键词:kimberlite geological characteristics contamination index thrust nappe structure Wafangdian, Liaoning |
| 基金项目:2019年度辽宁省地质勘查项目“瓦房店金刚石整装勘查区增储专项”(编号: LNZC2019-0078-20) |
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| Geological Characteristics of Kimberlites in Wafangdian Diamond Orefield, Liaoning Province |
| The Wafangdian diamond ore field in Liaoning is located in the Neoproterozoic-Paleozoic depression zone of Liaodong in the North China Block. The diamond mines in the ore field are all kimberlitic-type. To date, more than 100 kimberlites have been discovered, among which there are four large primary diamond deposits and three near-source small diamond sand deposits. The deposits account for more than half of China’s diamond resources. The kimberlites in the ore field are distributed in swarms and belts, with rock pipes and rock veins that vary in size and shape. Kimberlite is not only the carrier of diamonds, but also important for studying the deep Earth. In this study, the characteristics of kimberlitic intrusions were studied during the exploration of diamond mines. It is believed that the kimberlites in different areas of the ore field were contaminated by the surrounding rock composition to different degrees. The kimberlites in the southwestern swarms are more suitable for studying the deep earth. The main factors affecting the shape of the pipes or veins in this area is the fault structure, which provided in-situ magma intrusion channels, and the thrust nappe structure after diagenesis. It is also believed that the large and deep fault that controls the kimberlitic intrusion in the area is the old Tanlu fault. |
| FU Hai-tao,WAN Fang-lai,JIANG Li-li,XU Hua,LI Yi-xin,YANG Lei.2021.Geological Characteristics of Kimberlites in Wafangdian Diamond Orefield, Liaoning Province[J].Acta Geoscientica Sinica,42(6):859-867. |
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