Gold-Bearing Mesothermal Veins from the Gubong Mine, Cheongyang Gold District, Republic of Korea: Fluid Inclusion and Stable Isotope Studies

2006 ◽  
Vol 101 (4) ◽  
pp. 883-901 ◽  
Author(s):  
B. C. Yoo ◽  
H. K. Lee ◽  
N. C. White
Keyword(s):  
Stable Isotope ◽  
Fluid Inclusion ◽  
Republic Of Korea ◽  
Isotope Studies ◽  
Gold Bearing

Conditions for emerald formation at Davdar, China: fluid inclusion, trace element and stable isotope studies

2012 ◽  
Vol 76 (1) ◽  
pp. 213-226 ◽  
Author(s):  
D. Marshall ◽  
V. Pardieu ◽  
L. Loughrey ◽  
P. Jones ◽  
G. Xue
Keyword(s):  
Stable Isotope ◽  
Fluid Inclusion ◽  
Trace Element ◽  
Metasedimentary Rocks ◽  
Quartz Veins ◽  
Trace Element Chemistry ◽  
Stable Isotope Signatures ◽  
Swat Valley ◽  
Isotope Studies ◽  
Geological Work

AbstractPreliminary geological work on samples from Davdar in China indicate that emerald occurs in quartz veins hosted within upper greenschist grade Permian metasedimentary rocks including quartzite, marble, phyllite and schist. Fluid inclusion studies indicate highly saline fluids ranging from approximately 34 to 41 wt.% NaCl equivalent, with minimal amounts of CO2 estimated at a mole fraction of 0.003. Fluid inclusion, stable isotope and petrographic studies indicate the Davdar emeralds crystallized from highly saline brines in greenschist facies conditions at a temperature of ∼350°C and a pressure of up to 160 MPa. The highly saline fluid inclusions in the emeralds, the trace-element chemistry and stable isotope signatures indicate that the Davdar emeralds have some similarities to the Khaltaro and Swat Valley emerald deposits in Pakistan, but they show the greatest similarity to neighbouring deposits at Panjshir in Afghanistan.

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