Mineralogy, Fluid Inclusion, and Stable Isotope Studies of the Chengchao Deposit, Hubei Province, Eastern China: Implications for the Formation of High-Grade Fe Skarn Deposits

2019 ◽  
Vol 114 (2) ◽  
pp. 325-352 ◽  
Author(s):  
Wei Li ◽  
Guiqing Xie ◽  
Jingwen Mao ◽  
Qiaoqiao Zhu ◽  
Jiahao Zheng
Keyword(s):  
Stable Isotope ◽  
Fluid Inclusion ◽  
Eastern China ◽  
Hubei Province ◽  
High Grade ◽  
Skarn Deposits ◽  
Isotope Studies

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.

An application of cathodoluminescence microscopy to the study of textures and reactions in high-grade marbles from Connemara, Ireland

1989 ◽  
Vol 126 (4) ◽  
pp. 333-337 ◽  
Author(s):  
B. W. D. Yardley ◽  
G. E. Lloyd
Keyword(s):  
Stable Isotope ◽  
Transmitted Light ◽  
Amphibolite Facies ◽  
High Grade ◽  
Large Reduction ◽  
Secondary Porosity ◽  
Wide Range ◽  
Growth Zones ◽  
Isotope Studies ◽  
Western Ireland

AbstractUpper amphibolite facies dolomite and calcite marbles from the Dalradian Connemara Marble Formation of western Ireland display a wide range of textures when viewed in cathodoluminescence that are invisible in transmitted light. Examples observed include growth zones in calcite that appear to represent the infilling of a metamorphic secondary porosity, produced by the large reduction in solid volume accompanying growth of tremolite from dolomite and quartz. Retrograde phenomena are widespread, and include both carbonate pseudomorphs after tremolite and coarse veining, which is in optical continuity with peak metamorphic calcite but otherwise indistinguishable from it. Admixture of such widely differing calcite types may account for scatter in some stable isotope studies of marbles.

Fluid inclusion and stable isotope studies of the Mesloula Pb-Zn-Ba ore deposit, NE Algeria: Characteristics and origin of the mineralizing fluids

2016 ◽  
Vol 121 ◽  
pp. 119-135 ◽  
Author(s):  
Rabah Laouar ◽  
Sihem Salmi-Laouar ◽  
Lounis Sami ◽  
Adrian J. Boyce ◽  
Omar Kolli ◽  
...  
Keyword(s):  
Stable Isotope ◽  
Fluid Inclusion ◽  
Ore Deposit ◽  
Isotope Studies ◽  
Mineralizing Fluids
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