【作者】 罗朝舜；

【Author】 Luo Zhaoshun (Yunnan Institute of Geological Sciences)

【机构】 云南省地质科学研究所；

【摘要】 <正>一、区域地质背景德钦-下关地区位于滇西北,北自德钦,南至巍山,西以澜沧江为界,东至宾川。长约400km,宽40—120km,面积约4万多平方公里。其地理位置在东经98°50′—100°45′, 北纬24°30′—28°50′的范围内．更多还原

【Abstract】 Structural feature and tectonic framework are obvious on the enhanced MSS image in Deqên-Xiaguan area,Yunnan,on which different grade of image geological units can be recognized.The recognized linear and circular (or blocky)structures show an indication to hidden structures in this area,which,thus,has strengthened the geological knowledge of this area. The linear structure,compounding relationship and its geomechanics in Deqên-Xiaguan area suggest presence of the same-directed set of linear structure in different geological units,for which there is difference in age of formation and direction of movement.Generally,the eastern linear image area is older than the western image area in age,the former showing a polyphase compounding feature. An interdependence between circular(or blocky)and linear structures in Deqên-Xiaguan area is evident,which often occurred near fault structure zones,and associated closely with tectonomagmatic(hydrothermal)mine- ralization zones.Two different genetic types of mineralization zone have been recognized in an area between Geza-Qiaohou and Red River deep fault zones,indicating a Sn-trending structural control on ore deposits or mine- ralizations.In the eastern part,there are porphyry and contact-metaso- matic Pb-Zn mineralization zones dominated. A corresponding study on remote-sensing image structures and known ore deposits(occurrences)indicates that the strong structure-controlled ore guide is of practical significance for determinations of minerogenetic prospect province and prospecting target.更多还原