Geology and ages of porphyry and medium- to high-sulphidation epithermal gold deposits of the continental margin of Northeast China

Han, Shijiong; Sun, Jing; Bai, Ling-An; Xing, Shuwen; Chai, Peng; Zhang, Yong; Yang, Fan; Men, Lan-Jing; Li, Yixin

doi:10.1080/00206814.2012.695472

Cited by 43 publications

(23 citation statements)

References 15 publications

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“…Crustal Ar mainly occurs in potassium-bearing micas and K-feldspar (Mcdougall and Harrison 1989). However, as Bing et al (1995), Huang (1997), and Yang et al (2010), indicating the evolution of the hydrothermal fluids the measured samples are fluid inclusions from sulfides being devoid of K and the time of entrapment is Early Cretaceous (Han et al 2013) it can be assumed that these values represent those of the fluid at the time of inclusion entrapment. In terms of isotope ratios, the 3 He/ 4 He ratios cover the range 0.033 to 0.104 Ra with an average of 0.061 Ra.…”

Section: Noble Gas Isotopesmentioning

confidence: 94%

“…Geochronology data for the host rocks and alteration minerals show that the monzonitic granite in the mining area is Early Jurassic in age (Zhang 2002;Han et al 2013) the main vein rocks associated with the ore body are diorite-porphyry of 130-123.3 Ma in age (Han et al 2013;Lin 2013) and the Jingouling group formed at 123-115 Ma (Jin 2003). Han et al (2013) obtained a 40 Ar/ 39 Ar plateau age of 128.6±1.4 Ma from secondary sericite, and Meng et al (2001) obtained a 40 Ar/ 39 Ar isochron age of 123.6±2.5 Ma from quartz-hosted fluid inclusions. The above studies indicate that the Naozhi Au-Cu deposit is related to intermediate-basic magmatism and to subvolcanic, shallow magmatism of the Jingouling stage (Early Cretaceous).…”

Section: Ore Deposit Geologymentioning

confidence: 99%

“…The deposit is hosted by Lower Jurassic granodiorite, biotite monzonitic granite, and quartz diorite and is overlain by Lower Cretaceous volcanic rocks and subvolcanic intrusions (Zhang 2002;Zhang et al 2004;Han et al 2013). Geochronology data for the host rocks and alteration minerals show that the monzonitic granite in the mining area is Early Jurassic in age (Zhang 2002;Han et al 2013) the main vein rocks associated with the ore body are diorite-porphyry of 130-123.3 Ma in age (Han et al 2013;Lin 2013) and the Jingouling group formed at 123-115 Ma (Jin 2003). Han et al (2013) obtained a 40 Ar/ 39 Ar plateau age of 128.6±1.4 Ma from secondary sericite, and Meng et al (2001) obtained a 40 Ar/ 39 Ar isochron age of 123.6±2.5 Ma from quartz-hosted fluid inclusions.…”

Section: Ore Deposit Geologymentioning

confidence: 99%

“…1b). These discoveries indicate the high potential of the area to host epithermal goldcopper deposits (Bing et al 1995;Meng et al 2001;Han et al 2013).…”

Section: Introductionmentioning

confidence: 95%

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Origin and evolution of ore fluids in the late Mesozoic Naozhi epithermal Au–Cu deposit, Yanbian area, Northeast China: evidence from fluid inclusion and isotopic geochemistry

Men

Sun

et al. 2016

Arab J Geosci

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The Naozhi Au-Cu deposit is located on the continental margin of Northeast China, forming part of the West Pacific porphyry-epithermal gold-copper metallogenic belt. In this paper, we systematically analyzed the compositions, homogenization temperatures, and salinity of fluid inclusions as well as their noble gas isotopic and Pb isotopic compositions from the deposit. These new data show that (1) five types of fluid inclusions were identified as pure gas inclusions (V-type), pure liquid inclusions (L-type), gas-liquid two-phase inclusions (W-type, as the main fluid inclusions (FIs)), CO 2 -bearing inclusions (C-type), and daughter-mineral-bearing polyphase inclusions (S-type); (2) W-type FIs in quartz crystals of early, main, and late stage are homogenized at temperatures of 324.7-406.7, 230-338.8, and 154.6-308°C, with salinities of 2.40-7.01 wt% NaCl eq , 1.73-9.47 wt% NaCl eq , and 6.29 wt% NaCl eq , respectively. S-type FIs in quartz crystals of early stage are homogenized at temperatures of 328.6-400°C, with salinities of 39.96-46.00 wt% NaCl eq ; (3) Raman analysis results reveal that the vapor compositions of early ore-forming fluids consisted of CO 2 and H 2 O, with H 2 O gradually increasing and CO 2 being absent at the late mineralization stage; (4) fluid inclusions in pyrite and chalcopyrite have 3 He/ 4 He ratios of 0.03-0.104 Ra, 20 Ne/ 22 Ne ratios of 9.817-9.960, and 40 Ar/ 36 Ar ratios of 324-349. These results indicate that the percentage of radiogenic 40 Ar* in fluid inclusions varies from 8.8 to 15.5 %, containing 84.5-91.2 % atmospheric 40 Ar; (5) the 206 Pb/ 204 Pb, 207 Pb/ 204 Pb, and 206 Pb/ 204 Pb ratios of sulfides are 18. 1822-18.3979, 15.5215-15.5998, and 38.1313-38.3786, respectively. These data combined with stable isotope data and the chronology of diagenesis and metallogenesis enable us suppose that the ore-forming fluids originated from the melting of the lower crust, caused by the subduction of an oceanic slab, whereas the mineralized fluids were exsolved from the late crystallization stage and subsequently contaminated by crustal materials/fluids during ascent, including meteoric water, and the mineral precipitation occurred at a shallow crustal level.

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Section: Noble Gas Isotopesmentioning

confidence: 94%

Section: Ore Deposit Geologymentioning

confidence: 99%

Section: Ore Deposit Geologymentioning

confidence: 99%

“…1b). These discoveries indicate the high potential of the area to host epithermal goldcopper deposits (Bing et al 1995;Meng et al 2001;Han et al 2013).…”

Section: Introductionmentioning

confidence: 95%

See 2 more Smart Citations

Origin and evolution of ore fluids in the late Mesozoic Naozhi epithermal Au–Cu deposit, Yanbian area, Northeast China: evidence from fluid inclusion and isotopic geochemistry

Men

Sun

et al. 2016

Arab J Geosci

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“…The majority of the igneous rocks in NE China have Yanshanian ages [23,29,30] and have been attributed to the tectonic-thermal events related to the Paleo-Pacific plate subduction or subsequent slab rollback [23,29]. Coinciding with the Yanshanian magmatism, many hydrothermal ore systems formed in NE China, and many of them are Mo-dominant porphyry deposits [8,9,31], with less of skarn or epithermal types [31][32][33][34].…”

Section: Regional Geologymentioning

confidence: 99%

Fluid Inclusion and Oxygen Isotope Constraints on the Origin and Hydrothermal Evolution of the Haisugou Porphyry Mo Deposit in the Northern Xilamulun District, NE China

Shu¹,

Lai²

2017

Geofluids

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The Haisugou porphyry Mo deposit is located in the northern Xilamulun district, northeastern China. Based on alteration and mineralization styles and crosscutting relationships, the hydrothermal evolution in Haisugou can be divided into three stages: an early potassic alteration stage with no significant metal deposition, a synmineralization sericite-chlorite alteration stage with extensive Mo precipitation, and a postmineralization stage characterized by barren quartz and minor calcite and fluorite. The coexistence of high-salinity brine inclusions with low-salinity inclusions both in potassic alteration stage (∼440 ∘ C) and locally in the early time of mineralization stage (380-320 ∘ C) indicates the occurrence of fluid boiling. The positive correlations between the homogenization temperatures and the salinities of the fluids and the low oxygen isotopic compositions ( 18 O fluid < 3‰) of the syn-to postmineralization quartz together suggest the mixing of magmatic fluids with meteoric water, which dominated the whole mineralization process. The early boiling fluids were not responsible for ore precipitation, whereas the mixing with meteoric water, which resulted in temperature decrease and dilution that significantly reduced the metal solubility, should have played the major role in Mo mineralization. Combined fluid inclusion microthermometry and chlorite geothermometer results reveal that ore deposition mainly occurred between 350 and 290 ∘ C in Haisugou.

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U–Pb zircon and geochemical constraints on age and genesis of granitoids from the Jinchang Au deposit in Heilongjiang, NE China

Han

Yang

et al. 2017

Geological Journal

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The Jinchang Au deposit is a large‐sized deposit in Heilongjiang Province, and mineralization is closely related to the Early Cretaceous granitoids. The orebodies occurred within granite, granite porphyry, granodiorite, and diorite. Gold mineralization type consists of crypto‐explosive breccia, vein, and veinlet‐disseminated types. In this paper, we present U–Pb age as well as major and trace element geochemistry of intrusive bodies from the Jinchang deposit. Our study indicates that granite, granite porphyry, and granodiorite from the Jinchang deposit are calc‐alkaline to high‐K calc‐alkaline with geochemical characteristics of typical island‐arc environment. Diorite and diorite porphyrite show calc‐alkaline affinities with geochemical characteristics of adakite or adakitic rock. Concordant zircon U–Pb ages of 184.69 ± 0.98 Ma and 203.62 ± 0.86 Ma are obtained from granites; 190.4 ± 4.7 Ma, 205.88 ± 0.95 Ma, and 109.0 ± 2.4 Ma are obtained from granite porphyry, granodiorite, and quartz diorite. Combined with previous geochronological data, the diagenetic ages for granitoids in the Jinchang deposit are mainly focused on 2 episodes: 110 ~ 120 Ma and 185 ~ 200 Ma. The corresponding tectonic settings for the 2 episodes of magmatic activities are subduction of the Izanagi Plate towards the Eurasian Plate, and post‐collision system after the collision of North China Craton and Jiamusi‐Khanka Massif, respectively. We suggest that the magmatism (110 ~ 120 Ma) formed adakitic diorite and diorite porphyrite and closely associated with mineralization. Upwelling mantle results in partial melting of the lower crust and extract and transfer metals to the upper crust for further concentration. It also reveals that Jinchang Au deposit is an adakite‐associated deposit.

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Geology and ages of porphyry and medium- to high-sulphidation epithermal gold deposits of the continental margin of Northeast China

Cited by 43 publications

References 15 publications

Origin and evolution of ore fluids in the late Mesozoic Naozhi epithermal Au–Cu deposit, Yanbian area, Northeast China: evidence from fluid inclusion and isotopic geochemistry

Origin and evolution of ore fluids in the late Mesozoic Naozhi epithermal Au–Cu deposit, Yanbian area, Northeast China: evidence from fluid inclusion and isotopic geochemistry

Fluid Inclusion and Oxygen Isotope Constraints on the Origin and Hydrothermal Evolution of the Haisugou Porphyry Mo Deposit in the Northern Xilamulun District, NE China

U–Pb zircon and geochemical constraints on age and genesis of granitoids from the Jinchang Au deposit in Heilongjiang, NE China

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