Source and evolution of fluids in the Shihu gold deposit, Taihang Mountains, China: evidence from microthermometry, chemical composition and noble gas isotope of fluid inclusions

2012 ◽  
Vol 12 (2) ◽  
pp. 177-191 ◽  
Author(s):  
Ye Cao ◽  
Emmanuel John M. Carranza ◽  
Shengrong Li ◽  
Meijuan Yao ◽  
Huafeng Zhang
Keyword(s):  
Chemical Composition ◽  
Gold Deposit ◽  
Fluid Inclusions ◽  
Noble Gas ◽  
Noble Gas Isotope

Fluid inclusions, H-O, S, Pb, and noble gas isotope studies of the Baiyun gold deposit in the Qingchengzi orefield, NE China

2019 ◽  
Vol 200 ◽  
pp. 37-53 ◽  
Author(s):  
Peng Zhang ◽  
Lin-Lin Kou ◽  
Yan Zhao ◽  
Zhong-Wei Bi ◽  
De-Ming Sha ◽  
...  
Keyword(s):  
Gold Deposit ◽  
Fluid Inclusions ◽  
Noble Gas ◽  
Ne China ◽  
Noble Gas Isotope ◽  
Isotope Studies

scholarly journals Genesis of the Late Cretaceous Longquanzhan Gold Deposit in the Central Tan-Lu Fault Zone, Shandong Province, China: Constraints from Noble Gas and Sulfur Isotopes

Minerals ◽  
2021 ◽  
Vol 11 (3) ◽  
pp. 250
Author(s):  
Chuanpeng Liu ◽  
Wenjie Shi ◽  
Junhao Wei ◽  
Huan Li ◽  
Aiping Feng ◽  
...  
Keyword(s):  
Gold Deposit ◽  
Fault Zone ◽  
Late Cretaceous ◽  
Genetic Model ◽  
Gold Mineralization ◽  
Sulfur Isotopes ◽  
Noble Gas ◽  
Gold Deposits ◽  
Shandong Province ◽  
Magma Sources

The Longquanzhan deposit is one of the largest gold deposits in the Yi-Shu fault zone (central section of the Tan-Lu fault zone) in Shandong Province, China. It is an altered-rock type gold deposit in which ore bodies mainly occur at the contact zone between the overlying Cretaceous rocks and the underlying Neoarchean gneissic monzogranite. Shi et al. reported that this deposit formed at 96 ± 2 Ma using pyrite Rb–Sr dating method and represents a new gold mineralization event in the Shandong Province in 2014. In this paper, we present new He–Ar–S isotopic compositions to further decipher the sources of fluids responsible for the Longquanzhan gold mineralization. The results show that the δ34S values of pyrites vary between 0.9‰ and 4.4‰ with an average of 2.3‰. Inclusion-trapped fluids in ore sulfides have 3He/4He and 40Ar/36Ar ratios of 0.14–0.78 Ra and 482–1811, respectively. These isotopic data indicate that the ore fluids are derived from a magmatic source, which is dominated by crustal components with minor mantle contribution. Air-saturated water may be also involved in the hydrothermal system during the magmatic fluids ascending or at the shallow deposit site. We suggest that the crust-mantle mixing signature of the Longquanzhan gold deposit is genetically related to the Late Cretaceous lithospheric thinning along the Tan-Lu fault zone, which triggers constantly uplifting of the asthenosphere surface and persistent ascending of the isotherm plane to form the gold mineralization-related crustal level magma sources. This genetic model can be applied, to some extent, to explain the ore genesis of other deposits near or within the Tan-Lu fault belt.

Genesis of the Xinfang Gold Deposit, Liaodong Peninsula: Insights from Fluid Inclusions and S-Sr Isotopic Constraints

2021 ◽  
Vol 32 (1) ◽  
pp. 68-80
Author(s):  
Shuaijie Liu ◽  
Bin Chen ◽  
Jiahao Zheng ◽  
Chuang Bao ◽  
Guochun Zhao
Keyword(s):  
Gold Deposit ◽  
Fluid Inclusions ◽  
Liaodong Peninsula ◽  
Isotopic Constraints

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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