THE Laojunshan metallogenic district located in southeastern Yunnan is an important tin polymetallic metallogenic district in China. The Dulong (tin-zinc polymetal, superlarge), Xinzhai (tin, large) andNanyangtian (sc...THE Laojunshan metallogenic district located in southeastern Yunnan is an important tin polymetallic metallogenic district in China. The Dulong (tin-zinc polymetal, superlarge), Xinzhai (tin, large) andNanyangtian (scheelite, large) are the main deposits in this district. These deposits outcrop in the Lower-Middle Cambrian metamorphic series, and most orebodies that associated with skarns closely are stratoid,lenticular in occurrence and in accordance with the wall rocks. Distributed around the Laojunshan granite, the above-mentioned deposits were considered to be of magmatic-hydrothermal origin. But展开更多
The Zheboshan gold deposit, which is located in the "Gold Triangle" area on the borders of Sichuan, Gansu and Shaanxi provinces, is a very complicated micro_fine disseminated gold deposit. Considering the IC...The Zheboshan gold deposit, which is located in the "Gold Triangle" area on the borders of Sichuan, Gansu and Shaanxi provinces, is a very complicated micro_fine disseminated gold deposit. Considering the ICP_MS measurements and Rb and Sr isotope data, it is suggested that the ore_forming materials may have come from the quartz_amphibole porphyrite dykes. It is also suggested that the age of ore deposit is generally consistent with the age of formation of the quartz_amphibole porphyrite. It is further deduced that the deposit is a magmatic hydrothermal ore deposit.展开更多
Through studying geo-geochemical characteristics and determining Sm-Nd and Rb-Sr isotopical ages in the Kanggur magnetite-chlorite formation gold deposit, some conclusions can be achieved: Sm-Nd isochron age is (290.4...Through studying geo-geochemical characteristics and determining Sm-Nd and Rb-Sr isotopical ages in the Kanggur magnetite-chlorite formation gold deposit, some conclusions can be achieved: Sm-Nd isochron age is (290.4 ±7)Ma, Rb-Sr isochron age is (282.3 ±5)Ma, mineralization is Late Hercynian and the formation of this gold deposit is related to the macro-展开更多
文摘THE Laojunshan metallogenic district located in southeastern Yunnan is an important tin polymetallic metallogenic district in China. The Dulong (tin-zinc polymetal, superlarge), Xinzhai (tin, large) andNanyangtian (scheelite, large) are the main deposits in this district. These deposits outcrop in the Lower-Middle Cambrian metamorphic series, and most orebodies that associated with skarns closely are stratoid,lenticular in occurrence and in accordance with the wall rocks. Distributed around the Laojunshan granite, the above-mentioned deposits were considered to be of magmatic-hydrothermal origin. But
文摘The Zheboshan gold deposit, which is located in the "Gold Triangle" area on the borders of Sichuan, Gansu and Shaanxi provinces, is a very complicated micro_fine disseminated gold deposit. Considering the ICP_MS measurements and Rb and Sr isotope data, it is suggested that the ore_forming materials may have come from the quartz_amphibole porphyrite dykes. It is also suggested that the age of ore deposit is generally consistent with the age of formation of the quartz_amphibole porphyrite. It is further deduced that the deposit is a magmatic hydrothermal ore deposit.
文摘Through studying geo-geochemical characteristics and determining Sm-Nd and Rb-Sr isotopical ages in the Kanggur magnetite-chlorite formation gold deposit, some conclusions can be achieved: Sm-Nd isochron age is (290.4 ±7)Ma, Rb-Sr isochron age is (282.3 ±5)Ma, mineralization is Late Hercynian and the formation of this gold deposit is related to the macro-
