Red clay type gold deposits,located in the south of China,are situated not only in orogenic belts,but also in inner cratons,where climate is tropical-subtropical with clear arid and humid.The lateritic weathering crus...Red clay type gold deposits,located in the south of China,are situated not only in orogenic belts,but also in inner cratons,where climate is tropical-subtropical with clear arid and humid.The lateritic weathering crust often can be divided into five zones,including topsoil,siliceous duricrust zone,multi-color zone(or red clay zone in some deposits),pallid zone and saprolite zone from surface to the base rock,several of which are absent in some deposits.The base rocks are composed mainly of carbonate rocks with minor clastic rocks,intermediate-basic volcanic rocks and intermediate-acid and alkalic intrusions.The orebodies are mainly located in the multi-color zone with part of them in the pallid and saprolite zones.The ore sources include orebodies of Carlin-type gold deposits and porphyry gold deposits,as well as gold-rich base rocks.The red clay type gold deposits experienced early-stage endogenic gold mineralization and laterization during the Tertiary and Quaternary.The areas with endogenic gold deposits,especially Carlin-type gold deposits and porphyry gold deposits in karst depressions on the plateau,structual erosional platforms in the middle-lower mountains,and intermountain basins in southern China are well worth studying to trace red clay type gold deposits.展开更多
AFTER the discovery of lateritic gold deposits in the world during the 1980s, many similar oxidized golddeposits have been discovered in southern China since 1989. Because the incomplete lateritization ofthe regolith ...AFTER the discovery of lateritic gold deposits in the world during the 1980s, many similar oxidized golddeposits have been discovered in southern China since 1989. Because the incomplete lateritization ofthe regolith compared with the laterite, these oxidized gold deposits were called the red-clay type gold deposits by Prof. Tu Guangzhi. The Shangmanggang gold deposit is a typical representative of the red-claytype gold deposit in western Yunnan Province. 1 Geology, climate, and geomorphology The Shangmanggang red-clay gold deposit is located in Luxi region, between Zhefang and LuxiCenozoic basins along the Longling-Runli Fault trending northeast. The northwestern flank of the basinsconsists of the Proterozoic Gaoligong Group composed of greenschist to amphibolitic metamorphic展开更多
基金supported by the National Basic Research Program of China(973 Program)(No. 2009CB421008)111 Project(No.B07011)Program for Changjiang Scholars and Innovative Research Team in University(PCSIRT)
文摘Red clay type gold deposits,located in the south of China,are situated not only in orogenic belts,but also in inner cratons,where climate is tropical-subtropical with clear arid and humid.The lateritic weathering crust often can be divided into five zones,including topsoil,siliceous duricrust zone,multi-color zone(or red clay zone in some deposits),pallid zone and saprolite zone from surface to the base rock,several of which are absent in some deposits.The base rocks are composed mainly of carbonate rocks with minor clastic rocks,intermediate-basic volcanic rocks and intermediate-acid and alkalic intrusions.The orebodies are mainly located in the multi-color zone with part of them in the pallid and saprolite zones.The ore sources include orebodies of Carlin-type gold deposits and porphyry gold deposits,as well as gold-rich base rocks.The red clay type gold deposits experienced early-stage endogenic gold mineralization and laterization during the Tertiary and Quaternary.The areas with endogenic gold deposits,especially Carlin-type gold deposits and porphyry gold deposits in karst depressions on the plateau,structual erosional platforms in the middle-lower mountains,and intermountain basins in southern China are well worth studying to trace red clay type gold deposits.
文摘AFTER the discovery of lateritic gold deposits in the world during the 1980s, many similar oxidized golddeposits have been discovered in southern China since 1989. Because the incomplete lateritization ofthe regolith compared with the laterite, these oxidized gold deposits were called the red-clay type gold deposits by Prof. Tu Guangzhi. The Shangmanggang gold deposit is a typical representative of the red-claytype gold deposit in western Yunnan Province. 1 Geology, climate, and geomorphology The Shangmanggang red-clay gold deposit is located in Luxi region, between Zhefang and LuxiCenozoic basins along the Longling-Runli Fault trending northeast. The northwestern flank of the basinsconsists of the Proterozoic Gaoligong Group composed of greenschist to amphibolitic metamorphic
