关键词: 铅锌多金属矿, 水系沉积物测量, 高精度磁测, 土壤地球化学测量, 成矿规律, 找矿靶区

Abstract: Qimantag area of Qinghai Province is located in the western part of East Kunlun Orogenic Belt，which possesses a complicated evolutional history and unique tectonic process.It is the most important polymetallic ore accumulated area in Northern Qinghai-Tibet Plateau.Adatangounao is located in the Qimantage iron-polymetallic metallogenic belt.In this area，the magmatic activity is strong，the faults is well developed and the prospecting potential is good.In order to find out the metallogenic conditions in this area，large-scale geological survey，high-precision magnetic survey and soil profile measurement are carried out on the basis of unconfirmed three 1∶50 000 stream sediment survey Hs[7乙3] 、Hs[8乙3] and Hs[6丙] comprehensive anomalies and high-precision magnetic measurement C16 anomaly. The anomalous high concentration is performed by exploratory trenches，combined with geological survey to identify the source and distribution characteristics of the mining area and to summarize the metallogenic regularity.The study results show that:①Cu，Ni and Co are the main metallogenic elements in the soil samples and have good correlation，among them，possibility of enrichment and mineralization of Ni is high，high-value anomalies of Cu， Ni， Co and Cr are widely distributed in the profile，the concentration centers are relatively prominent;②the anomaly intensity of high-precision magnetic measurement is especially strong near C16 anomaly center，the abnormal value is consistent with the intermediate to acidic intrusive rocks，gabbro plutons，diabase dikes and NW trending regional faults;③five lead-zinc-copper mineralization zones and seven orebodies （including five lead-zinc orebodies and two copper orebodies） have been delineated by the exploratory trenches in the surface mineralization point and the anomalous area，reliable prospecting target area is delineated，and its prospecting potential is discussed.The above analysis results further indicated that the discovery of the orebodies have deepened the understanding of metallogenic conditions in Adatangounao Mining Area，and prospecting breakthrough can be obtained by using integrated exploration methods of geology，geophysical exploration and geochemical exploration，in close association with metallogenic regularity.

Key words: Pb-Zn polymetallic deposit, Stream sediment survey, High-precision magnetic measurement, Soil geochemical measurement, Metallogenic regularity, Prospecting target area