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- W2380237630 abstract "The Luobuzhen Pb- Zn deposit in western Gangdese is hosted in the dacite of Linzizong Group and porphyritic monzogranite and controlled by faults. Its ore- forming processes can be divided into early quartz- pyrite stage( Stage I) and late quartz- polymetallic sulfide stage( Stage II).Three major types of fluid inclusions are identified in quartz of Stage I,i. e. pure gaseous inclusions( components are CO2 or CH4),aqueous inclusions( liquid components are mainly composed of H2 O with minor amount of CO2,and vapor components are mainly composed of H2 O and CO2) and daughter mineral- bearing inclusions. Types and the corresponding components of fluid inclusions in quartz of Stage II are similar to those in quartz of Stage I.However,both liquid and gas components of some of the aqueous inclusions in stage II quartz are H2 O. Two types of fluid inclusions are recognized in sphalerite of Stage II,i. e. aqueous inclusions and daughter mineral- bearing inclusions. Their liquid and gas components are dominated by H2 O and the daughter mineral is calcite. The inclusions of Stage I are homogenized at temperatures concentrating at 200 ~ 320℃ with salinities concentrating at 8 to 16% Na Cleqv. Inclusions of Stage II are homogenized at temperatures concentrating at 180 ~ 240℃ and 280 ~ 320℃,with salinities concentrating at 6 to 12% Na Cleqv. The metallogenic fluid is characterized by a H2O- Na Cl ± CO2 system with medium temperature and medium to low salinity. The δDH2Ovalues of metallogenic fluid vary from- 91‰ to- 125‰,while the δ18OH2Ovalues are between 3. 9‰ and 6. 6‰. These features suggest that the metallogenic fluid was mainly originated from magmatic water. Immiscibility is the major mechanism for deposition of sulfides." @default.
- W2380237630 created "2016-06-24" @default.
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- W2380237630 date "2015-01-01" @default.
- W2380237630 modified "2023-09-23" @default.
- W2380237630 title "Characteristics of Metallogenic Fluid in the Luobuzhen Pb- Zn Deposit of the Gangdese Belt,Southern Tibet" @default.
- W2380237630 hasPublicationYear "2015" @default.
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