高寒荒漠区异常查证技术方法——以青海龙尾沟铜、金矿床为例

Techniques for Anomaly Investigation in High and Cold Desert Region: A Case Study of the Discovery of the Longweigou Copper and Gold Deposit in Qinghai Province

高寒荒漠干旱区由于其独特的自然地理条件而使异常查证工作困难重重,效果不佳。对此种地区的异常查证工作,需采用非常规的方法,同时要对所查证异常的特征、异常区成矿控矿地质条件以及工作尺度和目的物尺度的充分研究后决定。在青海龙尾沟地区采用综合配套方法技术,以研究区1∶5万红外遥感航片解译为先导,技术上采用X荧光测量与现场快速分析相结合,配合基础地质路线调查,达到了快速查证异常之目的。结果表明,本文提出的高寒荒漠干旱景观区异常查证的综合配套方法是有效的。在青海龙尾沟地区的找矿工作中取得了突破,在阿尔金山南缘首次发现了具有工业意义、具一定规模和较大资源潜力的铜、金矿(化)体。

The anomaly investigation in the high and cold desert region is very difficult and of low efficiency because of the unique geographic features. The anomaly investigation in regions of such landscape should be carried out with non-conventional methods and based on detailed studies of such factors as anomaly characteristics, ore-control geological conditions, working scale and object scale. Composite and integrated techniques were adopted in Longweigou area, Qinghai Province. On the basis of interpretation of 1 ： 50,000 remote sensing images, the X-ray fluorescence method was used and in-situ rapid analysis was conducted in association with basic geological route investigation. As a result, the goal of rapid anomaly inspection was achieved. It can be concluded that the composite and integrated techniques put forward in this paper are effective in anomaly investigation of high and cold desert regions. A breakthrough was made in the ore prospecting work of Longweigou area, and Cu-Au ore （mineralized） bodies with economic potential were discovered for the first time on the southern margin of the Ahun Mountains.