Four distinct litho-tectonic belts (zones) in the Yinshan area, North China, were identified by pressure-temperature contours and litho-tectonic features, such as the Sanggan granulite belt, Jining metasedimentary bel...Four distinct litho-tectonic belts (zones) in the Yinshan area, North China, were identified by pressure-temperature contours and litho-tectonic features, such as the Sanggan granulite belt, Jining metasedimentary belt, Wulashan-Daqingshan front tectonic zone and Se' eratengshan belt. This area witnessed two important thermo-tectonic events. The older one is c. 2.5 Ga while the younger one c. 1.9 Ga. The Se' ertengshan Neoarchaean terrane features a clockwise PT path with the decompression ranging from > 1500 MPa to 800–1000 MPa in the Se' ertengshan belt, which implies an island arc setting. The Sanggan belt is a Mesoarchaean microcontinent reworked by Neoarchaean magma underplating, which shows an counterclockwise PT path. During the Palaeoproterozoic period, two Archaean continent (arc) collided. The Archaean basement of the Sanggan and Wulashan-Daqingshan belts overthrust northwards, the PTt paths of basement show a decompression from 1000–1200 MPa to 500–700 MPa. The PT paths of the Jining and Erdaowa Groups show different PTt paths: the former shows counterclockwise while the latter clockwise, which indicates that the Jining and Erdaowa groups formed in different thermo-tectonic settings.展开更多
Developed in the southeast coast of te East Shandong Peninsula,the Mesozoic fault-magma belt consists of five rock series:the syenite series;the monzonite series;the megaporphyritic monzogranite series;the biotite-gra...Developed in the southeast coast of te East Shandong Peninsula,the Mesozoic fault-magma belt consists of five rock series:the syenite series;the monzonite series;the megaporphyritic monzogranite series;the biotite-granite series;and the alkali granite seres.Based on their Rb-Sr isochron ages(122-220Ma),these rock series may be divided into three magma subcycles dated at Triassic,Late Jurassic and Early Cretaceous.The initial ^87Sr/^86Sr ration in these rock series range from 0.70436 to 0.7155.The starting points of the Rb-Sr isochrons exhibit four different distribution trends on the(^87Sr/^86Sr)i-^87Rb/^86Sr diagram.These characteristics show that the multiple granitic rock series are different in genesis and derivation.The syenite series might be derived from the combination of mantle-derived magma and crustal material,and the others could be derived from granulite-facies and amphibilite-facies rocks in the deep crust.展开更多
The copper deposits in the mid-lower reaches of the Changjiang River consist mainly of porphyry, skarn and massive sulphide deposits. According to the geological background, the types of ore deposits and the mineraliz...The copper deposits in the mid-lower reaches of the Changjiang River consist mainly of porphyry, skarn and massive sulphide deposits. According to the geological background, the types of ore deposits and the mineralization, the metallogenic model of the copper deposits is discussed. It is pointed out that the ore-forming hydrother-mal fluids came mainly from magmatic water and were related to the intermediate-acid intrusions, and that the formation of skarn and massive sulphide deposits coincided with the mineralization of porphyry deposits.展开更多
The Chengmenshan copper deposits in Jiangxi Province consist of skarn type, massive sulphide type and porphyry type of deposits. According to the sulphur isotopic compositions, evidence is given to discuss their genes...The Chengmenshan copper deposits in Jiangxi Province consist of skarn type, massive sulphide type and porphyry type of deposits. According to the sulphur isotopic compositions, evidence is given to discuss their genesis and the relationship of the展开更多
Metallogenic models of gold deposits of quartz vein type and altered rock type will be dis-cussed in this note. They are considered to be closely related to granite spatially andgenetically.
For the first time, we find kyanite-topazite which is similar to the white schist from abroad, in aiangsu, Anhui, Henan of China. Because of intercontinental obduction and collision, the kyanite-topazite is formed fro...For the first time, we find kyanite-topazite which is similar to the white schist from abroad, in aiangsu, Anhui, Henan of China. Because of intercontinental obduction and collision, the kyanite-topazite is formed from the superhigh-pressure metamorphism of sedimentary rock in continental crust, at the depth of mantle. Kyanite-topazite runs parallel to blue schist, eclogite and constitutes the high-pressure metamorphic belt in Central China. Its original rocks are a set of sedimentary rock series which is mainly composed of marginal shallow marine facies to continental facies pelitic to magnesium carbonatite, both rocks exist in Precambrian Middle-Upper Proterozoic metamorphic strata.展开更多
The transect from Manzhouli to Suifenhe is one of 11 geoscience transects in China,which are defined by Chinese Commission on the Lithosphere to practise the Global Geosciences Transects Project (GGT). It will help us...The transect from Manzhouli to Suifenhe is one of 11 geoscience transects in China,which are defined by Chinese Commission on the Lithosphere to practise the Global Geosciences Transects Project (GGT). It will help us establish lithosphere dynamics model of continental margin around the west Pacific ocean by investigating the structure展开更多
A detailed mapping work has revealed that the studied Santunying area, which is about 500 km^2, is dominantly composed of three granulite facies plutonic gneisses, Santunying gneiss, Xiaoguanzhuang gneiss, both Q-dior...A detailed mapping work has revealed that the studied Santunying area, which is about 500 km^2, is dominantly composed of three granulite facies plutonic gneisses, Santunying gneiss, Xiaoguanzhuang gneiss, both Q-dioritic in composition, and Qiuhuayu gneiss with tonalitic-trondhjimatic geochemistry. The Santunying gneiss, cut by the other展开更多
Grandidierite MgAl<sub>3</sub>BSiO<sub>9</sub> is a rare island silicate with extra anion [BO<sub>3</sub>]. It was firstly found in granities in the south Madagascar and associated ...Grandidierite MgAl<sub>3</sub>BSiO<sub>9</sub> is a rare island silicate with extra anion [BO<sub>3</sub>]. It was firstly found in granities in the south Madagascar and associated with orthoclase, microcline, almandine, hercynite and tourmaline etc. Then it was reportedly found in Hungary （1918）. The mineral firstly found in China was produced in gneiss of M ashan Group, the Sandaogou area of Jixi City of Heilongjiang Province. The long pale bluish green column of the metamorphic mineral was 0.8—4.0 mm in length and associated with bytownite,展开更多
1 Multi-member Deposits An ore deposit is generally composed of one type of deposits. For example,quartz vein deposits consist of quartz type of vein deposits; porphyry type of depositconsists of porphyry deposits. Ho...1 Multi-member Deposits An ore deposit is generally composed of one type of deposits. For example,quartz vein deposits consist of quartz type of vein deposits; porphyry type of depositconsists of porphyry deposits. However, exceptions also exist: a deposit can becomposed of two or three types of deposits which are genetically linked. This typeof deposit is named here multi-member deposit. In multi-member deposits, a展开更多
According to the features of geophysics, experimental petrology, granite geology and geochemistry, the differentiations of ore-bearing granitic magmas are discussed. It is put forward that only the supergene different...According to the features of geophysics, experimental petrology, granite geology and geochemistry, the differentiations of ore-bearing granitic magmas are discussed. It is put forward that only the supergene differentiations of ore-bearing granitic magma might exist, instead of the hypogene one of the magma. Based on it, a supergene differentiation model for the ore-bearlng granitic magma is presented.展开更多
A special type of massive sulphide deposit is widely distributed in Eastern China.They differapparently from those known as volcanogenic massive sulphide deposits related to the sea-floor exhalation andare associated ...A special type of massive sulphide deposit is widely distributed in Eastern China.They differapparently from those known as volcanogenic massive sulphide deposits related to the sea-floor exhalation andare associated with intermediate-acid intrusions both in space and in genesis.It is thus a new type of massivesulphide deposits and could be further derided into the Xinqiao,Wushan,Chengmenshan and Tongguanshansub-types.展开更多
文摘Four distinct litho-tectonic belts (zones) in the Yinshan area, North China, were identified by pressure-temperature contours and litho-tectonic features, such as the Sanggan granulite belt, Jining metasedimentary belt, Wulashan-Daqingshan front tectonic zone and Se' eratengshan belt. This area witnessed two important thermo-tectonic events. The older one is c. 2.5 Ga while the younger one c. 1.9 Ga. The Se' ertengshan Neoarchaean terrane features a clockwise PT path with the decompression ranging from > 1500 MPa to 800–1000 MPa in the Se' ertengshan belt, which implies an island arc setting. The Sanggan belt is a Mesoarchaean microcontinent reworked by Neoarchaean magma underplating, which shows an counterclockwise PT path. During the Palaeoproterozoic period, two Archaean continent (arc) collided. The Archaean basement of the Sanggan and Wulashan-Daqingshan belts overthrust northwards, the PTt paths of basement show a decompression from 1000–1200 MPa to 500–700 MPa. The PT paths of the Jining and Erdaowa Groups show different PTt paths: the former shows counterclockwise while the latter clockwise, which indicates that the Jining and Erdaowa groups formed in different thermo-tectonic settings.
文摘Developed in the southeast coast of te East Shandong Peninsula,the Mesozoic fault-magma belt consists of five rock series:the syenite series;the monzonite series;the megaporphyritic monzogranite series;the biotite-granite series;and the alkali granite seres.Based on their Rb-Sr isochron ages(122-220Ma),these rock series may be divided into three magma subcycles dated at Triassic,Late Jurassic and Early Cretaceous.The initial ^87Sr/^86Sr ration in these rock series range from 0.70436 to 0.7155.The starting points of the Rb-Sr isochrons exhibit four different distribution trends on the(^87Sr/^86Sr)i-^87Rb/^86Sr diagram.These characteristics show that the multiple granitic rock series are different in genesis and derivation.The syenite series might be derived from the combination of mantle-derived magma and crustal material,and the others could be derived from granulite-facies and amphibilite-facies rocks in the deep crust.
基金Project supported by the Doctorate Foundation of the State Education Commission of China
文摘The copper deposits in the mid-lower reaches of the Changjiang River consist mainly of porphyry, skarn and massive sulphide deposits. According to the geological background, the types of ore deposits and the mineralization, the metallogenic model of the copper deposits is discussed. It is pointed out that the ore-forming hydrother-mal fluids came mainly from magmatic water and were related to the intermediate-acid intrusions, and that the formation of skarn and massive sulphide deposits coincided with the mineralization of porphyry deposits.
基金Doctoral Foundation of the National Education Commission of China.
文摘The Chengmenshan copper deposits in Jiangxi Province consist of skarn type, massive sulphide type and porphyry type of deposits. According to the sulphur isotopic compositions, evidence is given to discuss their genesis and the relationship of the
基金Project supported by Doctorate Foundation of the State Education Commission of China.
文摘Metallogenic models of gold deposits of quartz vein type and altered rock type will be dis-cussed in this note. They are considered to be closely related to granite spatially andgenetically.
文摘For the first time, we find kyanite-topazite which is similar to the white schist from abroad, in aiangsu, Anhui, Henan of China. Because of intercontinental obduction and collision, the kyanite-topazite is formed from the superhigh-pressure metamorphism of sedimentary rock in continental crust, at the depth of mantle. Kyanite-topazite runs parallel to blue schist, eclogite and constitutes the high-pressure metamorphic belt in Central China. Its original rocks are a set of sedimentary rock series which is mainly composed of marginal shallow marine facies to continental facies pelitic to magnesium carbonatite, both rocks exist in Precambrian Middle-Upper Proterozoic metamorphic strata.
基金Project financially supported by the Ministry of Geology and Mineral Resources, China.
文摘The transect from Manzhouli to Suifenhe is one of 11 geoscience transects in China,which are defined by Chinese Commission on the Lithosphere to practise the Global Geosciences Transects Project (GGT). It will help us establish lithosphere dynamics model of continental margin around the west Pacific ocean by investigating the structure
文摘A detailed mapping work has revealed that the studied Santunying area, which is about 500 km^2, is dominantly composed of three granulite facies plutonic gneisses, Santunying gneiss, Xiaoguanzhuang gneiss, both Q-dioritic in composition, and Qiuhuayu gneiss with tonalitic-trondhjimatic geochemistry. The Santunying gneiss, cut by the other
文摘Grandidierite MgAl<sub>3</sub>BSiO<sub>9</sub> is a rare island silicate with extra anion [BO<sub>3</sub>]. It was firstly found in granities in the south Madagascar and associated with orthoclase, microcline, almandine, hercynite and tourmaline etc. Then it was reportedly found in Hungary （1918）. The mineral firstly found in China was produced in gneiss of M ashan Group, the Sandaogou area of Jixi City of Heilongjiang Province. The long pale bluish green column of the metamorphic mineral was 0.8—4.0 mm in length and associated with bytownite,
基金Project supported by the Doctor's Foundation of the National Education Committee of China the National Natural Science Foundation of China.
文摘1 Multi-member Deposits An ore deposit is generally composed of one type of deposits. For example,quartz vein deposits consist of quartz type of vein deposits; porphyry type of depositconsists of porphyry deposits. However, exceptions also exist: a deposit can becomposed of two or three types of deposits which are genetically linked. This typeof deposit is named here multi-member deposit. In multi-member deposits, a
文摘According to the features of geophysics, experimental petrology, granite geology and geochemistry, the differentiations of ore-bearing granitic magmas are discussed. It is put forward that only the supergene differentiations of ore-bearing granitic magma might exist, instead of the hypogene one of the magma. Based on it, a supergene differentiation model for the ore-bearlng granitic magma is presented.
基金the National Natural Science Foundation of ChinaDoctor's Foundation of the National Education Commission of China
文摘A special type of massive sulphide deposit is widely distributed in Eastern China.They differapparently from those known as volcanogenic massive sulphide deposits related to the sea-floor exhalation andare associated with intermediate-acid intrusions both in space and in genesis.It is thus a new type of massivesulphide deposits and could be further derided into the Xinqiao,Wushan,Chengmenshan and Tongguanshansub-types.
