摘要
滇东北地区被地质学家认为是铅锌(银)矿成矿地质条件优越的地区之一,但历年来发现的铅锌(银)矿床均为地表露头矿,找矿标志明显,容易发现,而这些矿床的探明储量几乎开采耗尽,地质工作面临老矿山深部和外围寻找隐伏矿床的艰巨任务。近年来云南地矿资源有限公司利用加拿大时间域瞬变电磁法(TEM)和直流激发极化法(IP)配合,在地形复杂的滇东北乐红铅锌矿深部勘查中进行应用研究,获得较好的找矿效果,随后该方法应用于周边地区寻找隐伏矿床,有些已获得成功,有些正在验证之中。通过实践以及综合研究,笔者认为瞬变电磁法和激发极化法配合,对地形复杂地区寻找隐伏矿床具有广阔的应用前景。
It is thought that northeastern Yunnan is one of the best areas in which geological setting has particularly advantageous for the formation of Pb - Zn （Ag） deposits. All Pb - Zn （Ag） deposits discovered in the area over the past years are exposed on the earth＇ s surface. Ore - prospecting criteria for these deposits are distinct and the deposits are easy to be discovered. The proved reserves of those Pb -Zn （Ag） deposits discovered in the area almost have been exhausted. The exploration geologists are facing hard tasks to predict hidden ores occurred at the depth and surrounding areas of the old mines. In recent years, Qujing Branch of Yunnan Geology and Mineral Resources Co. Ltd. successfully applied transient electromagnetic method （TEM） together with dual frequency induced polarization method （IP） surveying to explore ores in the depth of Lehong Pb -Zn （Ag） deposit, which occurs in the northeastern Yunnan with complicated landforms. Subsequently, TEM together with IP surveying has been applied to predict hidden ores occurred in the surrounding areas of the Lehong Pb - Zn（Ag） deposits. At present, hidden ores were discovered in some areas, and some TEM and IP anomalies are planned for drill - testing in other areas. Based on practical and comprehensive results, it has been pointed out that TEM together with IP surveying can be applied widely and effectively to explore hidden ores occurred in the areas with complicated landform.
出处
《地质与勘探》
CAS
CSCD
北大核心
2006年第3期81-85,共5页
Geology and Exploration
基金
国土资源大调查项目(编号:200310200032)资助
关键词
物探方法
寻找隐伏矿床
滇东北
geophysical prospecting method, exploring hidden deposits, northeastern Yunnan
