The studied area lies in the eastern sector of the Tethys. Since the Early Paleozoic, the Nujiang-Lancang-Jinsha Rivers （southwest Sanjiang） area has experienced the geological evolutionary phase of the Paleo-Tethys...The studied area lies in the eastern sector of the Tethys. Since the Early Paleozoic, the Nujiang-Lancang-Jinsha Rivers （southwest Sanjiang） area has experienced the geological evolutionary phase of the Paleo-Tethys, Meso-Tethys and Neo-Tethys. The multiple tectonic-magmatic activities have been occurred in the region, which have provided very favorable conditions. According to the regional geological characteristics, Geotectonic position is the area which can be divided into the following tectonic units： Kekexili-Yajiang passive continental margin, Garze-Litang plate junction, Dege-Zhongdian plate, Jinshajiang-Ailaoshan plate junction, Changdu-Simao plate, Lanchangjiang plate junction, Zuogong-Baoshan plate, Nujiang plate junction, Bomi-Tengchong plate and nine mineralization zones （Kekexili-Yajiang mineralization zone, Garze-Litang mineralization zone, Dege-Zhongdian mineralization zone, Jinshajiang-Ailaoshan mineralization zone, Changdu-Simao mineralization zone, Lanchangjiang mineralization zone, Zuogong-Baoshan mineralization zone, Nujiang mineralization zone and Bomi-Tengchong mineralization zone）. The authors discussed that the geotectonic evolution specializes are relative to the main mineralization in this region. These studies show the geotectonic evolution and mineralization in the Nujiang-Lancang-Jinsha Rivers area have gone through eight stages for the Cambrian. Because the tectonic-magmatic mineralization activities have occurred the rich minerals resources and ore deposit types have been forming in this region. Ore deposits may be divided into seven types： massive sulfide type, stratabound type, turbidite type, postmag-matic hydrothermal type, skarn type, porphyry type and ductile shear zone type gold deposit. Deep geological effect of southwest Sanjiang area for deposit and its mineralization and ore prospecting and metallogenic prediction research work, is expected to find new orebody and ore deposit. The study of geotonics and metallogenesis in the Nujiang-Lancang-Jinsha Rivers area has a new idea and important foundation for prospecting for the ore deposits in Sanjiang （Nujiang-Lancang-Jinsha Rivers area） region.展开更多
The Jinsha River-Lancang River-Nujiang River area is one of the important prospect areas for noble metal and nonferous metal deposits of China. Of a great variety of gold deposits present in this area, the following t...The Jinsha River-Lancang River-Nujiang River area is one of the important prospect areas for noble metal and nonferous metal deposits of China. Of a great variety of gold deposits present in this area, the following types seem to be economically most valuable and promising: tectonic alteration type in ophiolitic melange; polymetallic quartz vein type related to intermediate-acid intrusions; finely disseminated type in fracture zones; mixed hydrothermal type in tectonic fractures of carbonate rocks; hydrothermal type related to subvolcanic rocks; volcanic-hot spring type; submarine volcano exhalation-sedimentary-hydrothermal reformation type. Metallogenic epochs are exclusively Mesozoic and Cenozoic, and ore deposits and orebodies are controlled by linear structures. Magmatic activity has affected gold mineralization in varying degrees, and gold deposits are basically of mesothermal-epithermal type with ubiquitous and intense alterations. Ore-forming materials and hydrothermal solutions show multi-source character.展开更多
基金This work was supported by China Geological Survey （Grant No. H45C004002, 1212010784007, ZKD-94-17） and the Project of the National Natural Science Foundation of China （Grant No. 40272012）.
文摘The studied area lies in the eastern sector of the Tethys. Since the Early Paleozoic, the Nujiang-Lancang-Jinsha Rivers （southwest Sanjiang） area has experienced the geological evolutionary phase of the Paleo-Tethys, Meso-Tethys and Neo-Tethys. The multiple tectonic-magmatic activities have been occurred in the region, which have provided very favorable conditions. According to the regional geological characteristics, Geotectonic position is the area which can be divided into the following tectonic units： Kekexili-Yajiang passive continental margin, Garze-Litang plate junction, Dege-Zhongdian plate, Jinshajiang-Ailaoshan plate junction, Changdu-Simao plate, Lanchangjiang plate junction, Zuogong-Baoshan plate, Nujiang plate junction, Bomi-Tengchong plate and nine mineralization zones （Kekexili-Yajiang mineralization zone, Garze-Litang mineralization zone, Dege-Zhongdian mineralization zone, Jinshajiang-Ailaoshan mineralization zone, Changdu-Simao mineralization zone, Lanchangjiang mineralization zone, Zuogong-Baoshan mineralization zone, Nujiang mineralization zone and Bomi-Tengchong mineralization zone）. The authors discussed that the geotectonic evolution specializes are relative to the main mineralization in this region. These studies show the geotectonic evolution and mineralization in the Nujiang-Lancang-Jinsha Rivers area have gone through eight stages for the Cambrian. Because the tectonic-magmatic mineralization activities have occurred the rich minerals resources and ore deposit types have been forming in this region. Ore deposits may be divided into seven types： massive sulfide type, stratabound type, turbidite type, postmag-matic hydrothermal type, skarn type, porphyry type and ductile shear zone type gold deposit. Deep geological effect of southwest Sanjiang area for deposit and its mineralization and ore prospecting and metallogenic prediction research work, is expected to find new orebody and ore deposit. The study of geotonics and metallogenesis in the Nujiang-Lancang-Jinsha Rivers area has a new idea and important foundation for prospecting for the ore deposits in Sanjiang （Nujiang-Lancang-Jinsha Rivers area） region.
文摘The Jinsha River-Lancang River-Nujiang River area is one of the important prospect areas for noble metal and nonferous metal deposits of China. Of a great variety of gold deposits present in this area, the following types seem to be economically most valuable and promising: tectonic alteration type in ophiolitic melange; polymetallic quartz vein type related to intermediate-acid intrusions; finely disseminated type in fracture zones; mixed hydrothermal type in tectonic fractures of carbonate rocks; hydrothermal type related to subvolcanic rocks; volcanic-hot spring type; submarine volcano exhalation-sedimentary-hydrothermal reformation type. Metallogenic epochs are exclusively Mesozoic and Cenozoic, and ore deposits and orebodies are controlled by linear structures. Magmatic activity has affected gold mineralization in varying degrees, and gold deposits are basically of mesothermal-epithermal type with ubiquitous and intense alterations. Ore-forming materials and hydrothermal solutions show multi-source character.
