地气测量在叶县—邓县—南漳地学剖面研究中的应用

本剖面横跨华北地台南缘，秦岭造山带和杨子地台北缘。在剖面上系统地采集了壤中气、土壤和气溶胶样品，分别测定Ｃｒ、Ｃｏ、Ｎｉ、Ｃｕ、Ｐｈ、Ｚｎ等微量元素以及Ｈｇ气、Ｈｇ土、Ｒｎ、ＣＨ４、ＣＯ２等气体组分，研究了它们的空间分布特征，并结合剖面沿线的地质和地震资料，讨论了异常与岩性分布、地质构造和找矿靶区之间的关系。研究结果表明，宽坪群和二郎坪群是找寻多金属矿的有利层位；龙王集至龙门集一带是找油气的有利地段；潦河附近的Ｆ（１４）断裂带是一条规模较大的含金破碎带。这次试验的结果还表明，地气测量用于研究厚层的松散层覆盖下的地质构造具有良好的前景。

A Study of Application of Geogas Survey in Yexian-Dengxian-Nanzhang Geoscience Profile

The geoscience profile crosses the southerm margin of North China platform, Qinling orogenic belt and the notherm margin of Yangtze platform.Systematical sampling of soil-gas, soil and aerosol was conducted along the profile and determination of micro-elements Cr, Co, Ni, Cu, Ph, Zn and gaseous Hg,Rn, CH4,and CO, are performed. Based on the spatial distribution of some microelements and gas composition as well as geological and seismic data, relationship between anomalies and rock types,geological stuctures and mineralization targets are discussed. The results reveal that Kuanping Group and Erlangping Group are the favorable formations for searching polymetals deposits. LongwangJi- Longmenji arca is a promising area for oil-gas.Fault zone F(14) near the Liaohe River would be a significant target for gold dePOSits. The experiment results show that geogas survey is of good potential significance in prospecting for deep geological structures.