Insights from Pb Isotopes for Native Gold Formation During Hypogene and Supergene Processes at Rich Hill, Arizona

2013 ◽  
Vol 108 (7) ◽  
pp. 1577-1589 ◽  
Author(s):  
G. D. Kamenov ◽  
E. B. Melchiorre ◽  
F. N. Ricker ◽  
E. DeWitt
Keyword(s):  
Native Gold ◽  
Pb Isotopes ◽  
Supergene Processes

205Bi/206Bi cyclotron production from Pb-isotopes for absorption studies in humans

1993 ◽  
Vol 44 (12) ◽  
pp. 1467-1472
Author(s):  
R. Fischer ◽  
J. Wendel ◽  
B. Dresow ◽  
V. Bechtold ◽  
H.C. Heinrich
Keyword(s):  
Pb Isotopes ◽  
Cyclotron Production ◽  
Absorption Studies

scholarly journals Pb isotopes in the impact melt breccia 66095: Association with the Imbrium basin and the isotopic composition of lithologies at the Apollo 16 landing site

2017 ◽  
Vol 466 ◽  
pp. 608-616 ◽  
Author(s):  
Joshua F. Snape ◽  
Alexander A. Nemchin ◽  
Jeremy J. Bellucci ◽  
Martin J. Whitehouse
Keyword(s):  
Isotopic Composition ◽  
Landing Site ◽  
Pb Isotopes ◽  
Impact Melt ◽  
The Impact

Microthermometric and stable isotopic (O and H) characteristics of fluid inclusions in the porphyry related Çöpler (İliç - Erzincan) gold deposit, central eastern Turkey

2014 ◽  
Vol 6 (2) ◽  
Author(s):  
Oktay Canbaz ◽  
Ahmet Gökce
Keyword(s):  
Gold Deposit ◽  
Fluid Inclusions ◽  
Native Gold ◽  
Homogenization Temperature ◽  
Early Mesozoic ◽  
Wide Range ◽  
Stable Isotopic ◽  
Water Field ◽  
Two Phases ◽  
Opaque Minerals

AbstractThe Çöpler gold deposit occurs within the stockwork of quartz hosted by the Çöpler granitoid (Eosen) and by surrounding metasediments of Keban metamorphic (Late Paleozoic - Early Mesozoic) and the Munzur limestones (Late Carboniferous - Early Cretaceous).Native gold accompanied by small amounts of chalcopyrite, pyrite, magnetite, maghemite, hematite, fahlerz, marcasite, bornite, galena, sphalerite, specular hematite, goethite, lepidochrosite and bravoitic pyrite within the stockwork ore veinlets. In addition, epidote (pistazite - zoisite), garnet, scapolite, chlorite, tremolite/actinolite, muscovite and opaque minerals were determined within the veinlets occurred in skarn zones.The study of fluid inclusions in quartz veinlets showed that the hydrothermal fluids contain CaCl2, MgCl2 and NaCl and the salinities of the two phases (L+V) inclusions range from 1.7 to 20.6% NaCl equivalent. Salinity values up to 44% were determined within the halite bearing three phases inclusions. Their homogenization temperature values have a wide range from 145.0 to 380.0°C, indicative of catathermal/hypothermal to epithermal conditions. The δ 18O and δD values of the fluid inclusion waters from the Çöpler granitoid correspond to those assigned to Primary Magmatic Water, those from the metasediments of Keban metamorphics fall outside of the Primary Magmatic and are within the Metamorphic Water field. A sample from a quartz vein within the skarn zone hosted by the Munzur limestones has a particularly low δD value.The results suggest that fluids derived from the granitoids were mixed with those derived from the metasediments of Keban metamorphics and the the Munzur limestones and resulting in quartz veinlets in these lithologies and the formation of stockwork ores. In view of the occurrence, the features described and processes envisaged for this study area may be applicable in similar settings.

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