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Genesis of strata-bound ore deposits...

Rao, Xuefeng.

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Genesis of strata-bound ore deposits in central Guangxi, South China: Fluid inclusion and isotope constraints.

Record Type:	Electronic resources : Monograph/item
Title/Author:	Genesis of strata-bound ore deposits in central Guangxi, South China: Fluid inclusion and isotope constraints./
Author:	Rao, Xuefeng.
Description:	241 p.
Notes:	Source: Dissertation Abstracts International, Volume: 58-05, Section: B, page: 2323.
Contained By:	Dissertation Abstracts International58-05B.
Subject:	Geology. -
Online resource:	http://pqdd.sinica.edu.tw/twdaoapp/servlet/advanced?query=9732532
ISBN:	9780591420067

Genesis of strata-bound ore deposits in central Guangxi, South China: Fluid inclusion and isotope constraints.
Rao, Xuefeng.

Genesis of strata-bound ore deposits in central Guangxi, South China: Fluid inclusion and isotope constraints. - 241 p.

Source: Dissertation Abstracts International, Volume: 58-05, Section: B, page: 2323.

Thesis (Ph.D.)--Yale University, 1997.

Numerous strata-bound ore deposits in central Guangxi, South China are hosted by Devonian sediments. They include sandstone-hosted copper sulfide deposits, carbonate-hosted base metal sulfide and barite vein deposits, and chert-hosted bedded barite deposits.

ISBN: 9780591420067Subjects--Topical Terms:

516570
Geology.

Genesis of strata-bound ore deposits in central Guangxi, South China: Fluid inclusion and isotope constraints.
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100 1 $a Rao, Xuefeng. $3 3184633
245 1 0 $a Genesis of strata-bound ore deposits in central Guangxi, South China: Fluid inclusion and isotope constraints.
300 $a 241 p.
500 $a Source: Dissertation Abstracts International, Volume: 58-05, Section: B, page: 2323.
500 $a Directors: Danny M. Rye; Brian J. Skinner.
502 $a Thesis (Ph.D.)--Yale University, 1997.
520 $a Numerous strata-bound ore deposits in central Guangxi, South China are hosted by Devonian sediments. They include sandstone-hosted copper sulfide deposits, carbonate-hosted base metal sulfide and barite vein deposits, and chert-hosted bedded barite deposits.
520 $a The geological setting of the bedded barite deposits, the geochemical signatures of cherts and barites, and $\delta\sp{34}$S and $\delta\sp{18}$O values of barites, indicate that the deposits were formed by mixing of a hydrothermal fluid rich in SiO$\sb2$ and Ba with seawater whose dissolved sulfates were enriched in heavy S and O isotopes.
520 $a For the barite vein deposits, studies were conducted on the geological setting, paragenesis, fluid inclusions, $\delta\sp{34}$S and $\delta\sp{18}$O values of barites, and $\delta\sp{13}$C and $\delta\sp{18}$O values of carbonates. The results suggest the existence of shallow Late Devonian seawater and deep meteoric water circulations around and in the fractures hosting barite veins. Sulfates in the seawater were enriched in heavy isotopes of S and O. The meteoric water was rich in Ba. Mixing of the two fluids caused precipitation of barites in veins.
520 $a For the central Guangxi mineral district as a whole, constraints on mineralization were obtained from the geological setting, temperature and salinity of mineralizing fluids, $\delta\sp{34}$S and $\delta\sp{18}$O values of barites, $\delta\sp{34}$S values of sulfides, and Pb isotope ratios of sulfides. The constraints suggest the presence of shallow Late Devonian seawater and deep meteoric water circulations around a fracture zone in central Guangxi. Various ore deposits in the district were formed at different locations in the fracture zone by mixing the Cu, Pb, Zn, Ba, and SiO$\sb2$-bearing meteoric water with the sulfate or sulfide-bearing seawater.
520 $a The central Guangxi mineral district is only one of the seven Devonian carbonate-hosted base metal sulfide mineral districts in South China. Genetic evidence was drawn from the geological setting, salinity, Pb isotopic compositions of the basement rocks and of sulfides in the Devonian and Pre-Devonian sediment-hosted ore deposits, and $\delta\sp{34}$S values of sulfides in the Devonian sediment-hosted ore deposits. The evidence implies the existence of multiple central Guangxi-type convection cells during the Late Devonian in South China.
590 $a School code: 0265.
650 4 $a Geology. $3 516570
650 4 $a Geochemistry. $3 539092
650 4 $a Mineralogy. $3 516743
690 $a 0372
690 $a 0996
690 $a 0411
710 2 0 $a Yale University. $3 515640
773 0 $t Dissertation Abstracts International $g 58-05B.
790 $a 0265
791 $a Ph.D.
792 $a 1997
793 $a English
856 4 0 $u http://pqdd.sinica.edu.tw/twdaoapp/servlet/advanced?query=9732532