Genesis of Kanggur Gold Deposit in Eastern Tianshan Orogenic Belt, NW China: Fluid Inclusion and Oxygen and Hydrogen Isotope Constraints

Wang, Zhiliang; Jiang, Neng; Wang, Yitian; Mao, Jingwen; Yang, Jun

doi:10.1111/j.1751-3928.2004.tb00198.x

Cited by 14 publications

(9 citation statements)

References 19 publications

(27 reference statements)

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“…Studies of orogenic gold deposits by, for example, Kerrich et al (2001) and Mao et al (2002b) in the past several years have shown that this type of gold deposit is characterized by the common presence of abundant carbonate veins or quartz–carbonate veins in the late stage, and it has been suggested by these authors that ore‐forming fluids contain high CO 2 concentrations which were, at least in part, derived from mantle fluids. Examples are the Kanggur gold deposit (Wang et al , 2004; Mao et al , 2005) and deposits in the Jiaodong gold province in China (Mao et al , . 2002b) and gold deposits in the Yilgarn Craton, Western Australia (Groves et al , 2000).…”

Section: Discussionmentioning

confidence: 99%

Geology and Metallogenesis of the Sawayaerdun Gold Deposit in the Southwestern Tianshan Mountains, Xinjiang, China

et al. 2007

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The Sawayaerdun gold deposit, located in Wuqia County, Southwest Tianshan, China, occurs in Upper Silurian and Lower Devonian low-grade metamorphic carbonaceous turbidites. The orebodies are controlled by a series of NE-NNE-trending, brittle -ductile shear zones. Twenty-four gold mineralized zones have been recognized in the Sawayaerdun ore deposit. Among these, the up to 4-km-long and 200-m wide No. IV mineralized zone is economically the most important. The average gold grade is 1 -6 g/t. Gold reserves of the Sawayaerdun deposit have been identifi ed at approximately 37 tonnes and an inferred resource of 123 tonnes. Hydrothermal alteration is characterized by silicifi cation, pyritization, arsenopyritization, sericitization, carbonatization and chloritization. On the basis of fi eld evidence and petrographic analysis, fi ve stages of vein emplacement and hydrothermal mineralization can be distinguished: stage 1, early quartz stage, characterized by the occurrence of quartz veins; stage 2, arsenopyrite -pyrite -quartz stage, characterized by the formation of auriferous quartz veinlets and stockworks; stage 3, polymetallic sulfi de quartz stage, characterized by the presence of auriferous polymetallic sulfi de quartz veinlets and stockworks; stage 4, antimony -quartz stage, characterized by the formation of stibnite -jamesonite quartz veins; and stage 5, quartz -carbonate vein stage. Stages 2 and 3 represent the main gold mineralization, with stage 4 representing a major antimony mineralization episode in the Sawayaerdun deposit. Two types of fl uid inclusion, namely H 2 O -NaCl and H 2 O -CO 2 -NaCl types, have been recognized in quartz and calcite. Aqueous inclusions show a wide range of homogenization temperatures from 125 to 340°C, and can be correlated with the mineralization stage during which the inclusions formed. Similarly, salinities and densities of these fl uids range for each stage of mineralization from 2.57 to 22 equivalent wt% NaCl and 0.76 to 1.05 g/cm 3 , respectively. The ore-forming fl uids thus are representative of a medium-to low-temperature, lowto medium-salinity H 2 O -NaCl -CO 2 -CH 4 -N 2 system. The ␦ 34 S CDT values of sulfi des associated with mineralization fall into a narrow range of −3.0 to +2.6 ‰ with a mean of +0.1 ‰ . The ␦ 13 C PDB values of dolomite and siderite from the Sawayaerdun gold deposit range from −5.4 to −0.6 ‰ , possibly refl ecting derivation of the carbonate carbon from a mixed magmatic/sedimentary source. Changes in physico-chemical conditions and composition of the hydrothermal fl uids, water -rock exchange and immiscibility of hydrothermal fl uids are inferred to have played important roles in the ore-forming process of the Sawayaerdun gold -antimony deposit.

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Section: Discussionmentioning

confidence: 99%

Geology and Metallogenesis of the Sawayaerdun Gold Deposit in the Southwestern Tianshan Mountains, Xinjiang, China

et al. 2007

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“…Microthermometric measurements and H and O isotopic compositions of fluid inclusions show that from the intrusion-related type through shear zone-hosted type to epithermal type, the temperature, depth, and salinity of gold deposits decrease, and that the ore-forming fluids change gradually from dominantly magmatic (and metamorphic) hydrothermal fluids to fluids with a significant meteoric water component (Ji et al, 1997;Mao et al 2002;Zhang et al 2003;Wang et al 2004). Sulfur isotope study shows that the sulfur in the gold metallogenic system was mainly derived from the mantle or the great depth of the Earth (Ji et al 1994;Zhang et al 2003).…”

Section: Discussionmentioning

confidence: 96%

“…The shear system controls the attitude, shape, size and distribution of the orebodies (Wang et al 2003). The isotopic compositions (Zhang et al 2003;Wang et al 2004) indicate that ore-forming fluids originated from the deep-seated source. In the light of development of the synkinematic granitoids in the Yamansu-Kushui fault belt, it appears that the magmatism is related to shear melting, which can also produce dynamometamorphic fluids.…”

Section: Nature Of Gold Mineralizationmentioning

confidence: 99%

Strike-slip fault controls on mineralization in the Kanggurtag gold belt in the Eastern Tianshan, Xinjiang, NW China

Wang

Mao

Chen

et al. 2005

Mineral Deposit Research: Meeting the Global Challenge

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Abstract. The Kanggurtag gold belt is located in the eastern Tianshan Late Paleozoic orogenic belt, where three types of gold deposit are developed on the south margin of an east-west-trending ductile shear zone. From a tectonic point of view, we suggest that gold mineralization is dominantly controlled by post-collisional dextral strike-slip faults, and gold resources are the product of the same metallogenetic event in the Late Carboniferous-Early Permian. The spatial distribution of different types of gold deposits is restricted to different strain distribution along the shear zone. This proposed structural model has important implications for further exploration in this belt.

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“…The newly discovered Late Silurian granodiorite in the Tuwu–Yandong and Sanchakou deposit (Wang & Zhang, ; Xiao, Chen, Wang, & Yang, ) indicates that the Dananhu island arc and the Harlik island arc belong to the same island–arc system and were also created by a south‐dipping subduction of Kelameili oceanic plate (Deng, Wang, Pirajno, et al, ; Xiao et al, ). The Kanggur arc accretionary complex contains marine lavas and pyroclastic rocks that were thrust southward over the Yamansu arc (Xiao et al, ) and characterised by Carboniferous volcanic–sedimentary rocks and contains ductile shear zone‐hosted gold (Kanggur; Wang, Jiang, Wang, Mao, & Yang, ), Cu–Ni (Huangshan; Mao, Qin, & Barnes, ), and porphyry Mo (Baishan; Deng, Wang, Santosh, et al, ) deposits. The interpretation of the tectonic setting of the Kanggur arc is controversial, such as fore‐arc and inter‐arc basin origin (Ma et al, ; Xiao et al, ).…”

Section: Regional Geologymentioning

confidence: 99%

Petrogenesis of Early Devonian granodiorite in the Xiaobaishitou W–(Mo) ore district of East Tianshan, Northwest China, and tectonic implications: U–Pb geochronological, geochemical, and Sr–Nd isotopic evidence

Yang

Zhang

2019

Geological Journal

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The Palaeozoic intrusions of East Tianshan, China, are important for understanding the tectonic evolution of the Central Asian Orogenic Belt. We investigated one such Devonian granodiorite, located in the Xiaobaishitou W-(Mo) ore district of the Central Tianshan Block, to constrain its petrogenesis and geodynamic setting. Laser ablation inductively coupled plasma mass spectrometry (LA-ICP-MS) zircon U-Pb dating indicates that the granodiorite emplaced at 407 Ma and can be classified as an I-type granite based on its mineralogy and whole-rock geochemistry. The granodiorite also exhibits moderate Mg # values, high MgO, Ni, and CaO contents, depleted Ti and Nb concentrations, and negative ε Nd (t) values (−8.32 to −3.73), indicating a magma derived from the mantle but contaminated with ancient crustal rock. Mineral chemistry, saturation thermometry, and whole-rock Fe 2 O 3 /FeO ratios indicate crystallisation temperatures of 654-822°C, pressures of 1.8-2.1 kbar, and oxygen fugacity of ≤NNO for the granodiorite stock. We compare granodiorite geochemical data to those from other recent studies of Palaeozoic intrusive rocks in East Tianshan and infer that the formation of the Early Devonian granodiorite in the East Tianshan was due to a southdipping subduction of the Kanggur Ocean plate toward the Central Tianshan Block.

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Genesis of Kanggur Gold Deposit in Eastern Tianshan Orogenic Belt, NW China: Fluid Inclusion and Oxygen and Hydrogen Isotope Constraints

Cited by 14 publications

References 19 publications

Geology and Metallogenesis of the Sawayaerdun Gold Deposit in the Southwestern Tianshan Mountains, Xinjiang, China

Geology and Metallogenesis of the Sawayaerdun Gold Deposit in the Southwestern Tianshan Mountains, Xinjiang, China

Strike-slip fault controls on mineralization in the Kanggurtag gold belt in the Eastern Tianshan, Xinjiang, NW China

Petrogenesis of Early Devonian granodiorite in the Xiaobaishitou W–(Mo) ore district of East Tianshan, Northwest China, and tectonic implications: U–Pb geochronological, geochemical, and Sr–Nd isotopic evidence

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