1 Geologic setting The Xilin Gol Complex outcrops in the Bayan Gol area about 100 km to the northeast of Xilinhot City, Inner Mongolia (fig.1). Shao considered that the Xilin Gol Complex was an old tcrrane in the Pale...1 Geologic setting The Xilin Gol Complex outcrops in the Bayan Gol area about 100 km to the northeast of Xilinhot City, Inner Mongolia (fig.1). Shao considered that the Xilin Gol Complex was an old tcrrane in the Paleozoic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
The original rock formation age and metamorphic history of Chencai Group are one of the keys to understanding tectonics and early crustal evolution of Zhejiang and Fujian provinces. For the purpose of obtaining the or...The original rock formation age and metamorphic history of Chencai Group are one of the keys to understanding tectonics and early crustal evolution of Zhejiang and Fujian provinces. For the purpose of obtaining the original rock formation age and metamorphic age, Sm-Nd and Rb-Sr isotopic compositions of metamorphic rocks and minerals were determined. Although only the metamorphic age was obtained, Sm-Nd isotopic system resetting among minerals under amphibolite facies metamorphism was discovered, which is of significance for Sm-Nd chronology of metamorphic rocks.展开更多
Geologists are paying more attention to studies on genesis of granitoids and their metallogenetic characteristics through tracing their source materials and geological evolution by means of strontium, neodymium and le...Geologists are paying more attention to studies on genesis of granitoids and their metallogenetic characteristics through tracing their source materials and geological evolution by means of strontium, neodymium and lead isotopes. However, using Sm-Nd isotopes to study source rocks of young granites, especially of the Mesozoic granites is not as effective as using Rb-Sr isotopes. In order to explain geological significance of isotopic studies, this note only makes use of Rb-Sr and Pb isotopes to investigate the source rocks of Guposhan granite complex which is a very important granite pluton of the Mesozoic era in South China.展开更多
基金Project supported by Fok Ying Tung Education Foundation.
文摘1 Geologic setting The Xilin Gol Complex outcrops in the Bayan Gol area about 100 km to the northeast of Xilinhot City, Inner Mongolia (fig.1). Shao considered that the Xilin Gol Complex was an old tcrrane in the Paleozoic
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-
基金Project supported by the National Natural Science Foundation of China.
文摘The original rock formation age and metamorphic history of Chencai Group are one of the keys to understanding tectonics and early crustal evolution of Zhejiang and Fujian provinces. For the purpose of obtaining the original rock formation age and metamorphic age, Sm-Nd and Rb-Sr isotopic compositions of metamorphic rocks and minerals were determined. Although only the metamorphic age was obtained, Sm-Nd isotopic system resetting among minerals under amphibolite facies metamorphism was discovered, which is of significance for Sm-Nd chronology of metamorphic rocks.
基金Project supported by the National Natural Science Foundation of China.
文摘Geologists are paying more attention to studies on genesis of granitoids and their metallogenetic characteristics through tracing their source materials and geological evolution by means of strontium, neodymium and lead isotopes. However, using Sm-Nd isotopes to study source rocks of young granites, especially of the Mesozoic granites is not as effective as using Rb-Sr isotopes. In order to explain geological significance of isotopic studies, this note only makes use of Rb-Sr and Pb isotopes to investigate the source rocks of Guposhan granite complex which is a very important granite pluton of the Mesozoic era in South China.
