封面故事

Cover Story

新疆准噶尔北缘戈壁荒漠浅覆盖区浅钻探测。野外区域地质调查与浅覆盖区基岩地质填图,预测并发现了准噶尔北缘扎河坝-阿尔曼太蛇绿混杂岩带在西部浅覆盖区的延伸分布。利用地球物理(重磁电)探测技术和综合地质对比研究,开展了“剥离”浅覆盖区的基岩地质填图,提取了隐伏构造和岩体信息,浅钻探测验证了蛇绿混杂岩的标志性地质体(蛇纹石化超基性岩)及铜钴金等成矿元素异常和岩石蚀变信息,从而拓展了准噶尔成矿带浅覆盖区隐伏矿的找矿前景。该项由孟贵祥研究员主持的成果获得中国地质科学院2018年度优秀科技成果。

Shallow drilling exploration in shallowly covered area of gobi desert on the northern margin of Junggar Basin,Xinjiang.Field regional geological survey and base rock geological mapping in shallowly covered areas led to the prediction and discovery of the extending distribution of Zhaheba-Almantai ophiolite melange zone on the northern margin of Junggar in the shallowly covered areas of western China.Based on geophysical detection technologies such as gravity,magnetic and electrical method and comprehensive geological comparison,researchers carried out the study of“peeling”shallow overburden area on the geological mapping of bedrock and thus extracted the information of concealed structure and rock mass.The techniques of shallow drilling verified and revealed the landmark geological bodies of ophiolite melange zone(serpentinized ultrabasic rocks)and important metallogenic element anomalies as well as rock alteration information of copper,cobalt and gold resources.On such a basis,the prospecting of concealed ore in shallow overburden area of Junggar metallogenic belt has been expanded.The research achievement led by Professor MENG Gui-xiang obtained the honor of one of the excellent sci-tech achievements of the Chinese Academy of Geological Sciences in 2018.For details,see pp.637-650 of this issue.