Geological features and origin of gold deposits occurring in the Baotou–Bayan Obo district, south-central Inner Mongolia, People's Republic of China

Fengjun, Nie; Sihong, Jiang; Su, Xin-Xu; Wang, Xin-Liang

doi:10.1016/s0169-1368(02)00069-0

Cited by 36 publications

(18 citation statements)

References 20 publications

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“…Peripheral propylitic alteration comprises epidote, albite, pyrite, trace magnetite and chalcopyrite, and is commonly associated with dilatant fractures. The geological setting, geology, geochemistry, sulfur and lead isotopic features of the Wulashan gold deposit have already been described by Nie et al (2002), Hart et al (2002), Nie (1997b), and Nie and Bjørlykke (1994).…”

Section: F-j Nie S-h Jiang and Y Liu 316mentioning

confidence: 95%

“…A local government gold mine was established in 1992. Crude ore production of the mine is 1,000 tons a day (Nie et al, 2002).…”

Section: Wulashan Deposit South-central Inner Mongolianmentioning

confidence: 99%

“…RESOURCE GEOLOGY : dacite, and show a shoshonitic geochemical feature on the K 2 O % versus SiO 2 % plot (Nie et al, 2002). 40 Ar/ 39 Ar isotopic dating on K-feldspar separates from the alkaline syenite dykes have yielded two ages of 299±3 and 298±5 Ma (Nie et al, 2002).…”

Section: F-j Nie S-h Jiang and Y Liu 316mentioning

confidence: 99%

“…40 Ar/ 39 Ar isotopic dating on K-feldspar separates from the alkaline syenite dykes have yielded two ages of 299±3 and 298±5 Ma (Nie et al, 2002). The gold mineralization occurs within the alkaline syenite dykes, and neighboring Archean amphibolite, gneiss, leptynite and magnetite quartzite as irregular Kfeldspar-quartz veins, stratoid layers and lenses, which are controlled by the EW-and NE-trending structures (Nie et al, 2002).…”

Section: F-j Nie S-h Jiang and Y Liu 316mentioning

confidence: 99%

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Intrusion‐Related Gold Deposits of North China Craton, People's Republic of China

2004

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. Intrusion‐related gold deposits are widely distributed within the North China craton or along its marginal fold belts. Presently, about 200 individual intrusion‐related gold deposits (prospects) have been discovered, among which Yuerya, Anjia‐yingzi, Linglong, Jiaojia, Chenjiazhangzi, Qiyugou, Jinjiazhuang, Dongping, Hougou, Huangtuliang, Guilaizhuang, Wulashan and Donghuofang are the most important ones. In general, the intrusion‐related gold deposits can be classified into three major groups according to their host rocks: (1) hosted by or related to felsic intrusions, including (la) calc‐alkaline granitoid intrusions and (lb) cryptoexplosion breccia pipes; (2) related to ultramafic intrusions, and (3) hosted by or related to alkaline intrusions. The first group contains the Yuerya, Anjiayingzi, Linglong, Jiaojia, Chenjiazhangzi and Qiyugou gold deposits. Gold mineralization at these deposits occurs within Mesozoic Yanshanian calc‐alkaline granitoid intrusions or cryptoexplosion breccia pipes as gold‐bearing quartz veins and replacement bodies. Pyrite, galena, sphalerite, chalcopyrite, native gold and electrum are major metallic minerals. The Jinjiazhuang deposit belongs to the second group, and occurs within Hercynian diopsidite and peridotite as quartz veins and replacement bodies. Pyrite, marcasite, arsenopyrite, native gold and electrum are identified. The third group includes the Dongping, Hougou, Huangtuliang, Guilaizhuang, Wulashan and Donghuofang deposits. Gold mineralization at these deposits occurs predominantly within the Hercynian alkaline intrusive complexes as K‐feldspar‐quartz veins and replacement bodies. Major metal minerals are pyrite, galena, chalcopyrite, tellurides, native gold and electrum. All these pyrite separates from Hercynian and Yanshanian intrusions or cryptoexplosion pipes associated with the gold deposits show a broad range in δ34S value, which is overall higher than those Precambrian rocks and their hosted gold deposits. For the alkaline intrusion‐related gold deposits, the δ34S values of the sulfides (pyrite, galena and chalcopyrite) from the deposits increase systematically from orebodies to the alkaline intrusions. All of these intrusion‐related gold deposits show relatively radiogenic lead isotopic compositions compared to mantle or lower crust curves. Most lead isotope data of sulfides from the gold ores plot in between the fields of the intrusions and Precambrian metamorphic rocks. Data are interpreted as indicative of a mixing of sulfur and lead from magma with those from Precambrian metamorphic rocks. Isotopic age data, geological and geochemical evidences suggest that the ore‐forming materials for the intrusion‐related gold deposits were generated during the emplacement of the Hercynian or Yanshanian intrusion. The calc‐alkaline or alkaline magma may provide heat, volatiles and metals for the intrusion‐related gold deposits. Evolved meteoric water, which circulated the wall rocks, was also progressively involved in the magmatic hydrothermal system, and may hav...

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Section: F-j Nie S-h Jiang and Y Liu 316mentioning

confidence: 95%

“…A local government gold mine was established in 1992. Crude ore production of the mine is 1,000 tons a day (Nie et al, 2002).…”

Section: Wulashan Deposit South-central Inner Mongolianmentioning

confidence: 99%

Section: F-j Nie S-h Jiang and Y Liu 316mentioning

confidence: 99%

Section: F-j Nie S-h Jiang and Y Liu 316mentioning

confidence: 99%

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Intrusion‐Related Gold Deposits of North China Craton, People's Republic of China

2004

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“…This software was also used for data visualization including image overlays and the application of blending to allow visualization of map and terrain. b Terrain image of the northern section of the east Pit showing approximate locations of samples (collected on two separate field visits in 1990 and 1995) from the northern part of the 1,582 m level evolved at Bayan Obo, with compositions closely associated with alkaline-carbonatite suites (Campbell and Henderson 1997;Smith et al 1999Yuan et al 2000;Wang et al 2003;Fan et al 2004;ni et al 2004;Fan et al 2006;Smith 2007;Kynicky et al 2012;Smith and Spratt 2012;Smith et al 2014). a current review of the geochemical and isotopic complexity of Bayan Obo is explained in Smith et al (2014), culminating with an overall genetic model for the deposit, and highlighting key remaining questions.…”

Section: Introductionmentioning

confidence: 99%

Zircon from the East Orebody of the Bayan Obo Fe–Nb–REE deposit, China, and SHRIMP ages for carbonatite-related magmatism and REE mineralization events

Campbell

Compston

Sircombe

et al. 2014

Contrib Mineral Petrol

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match closely with those from the Mud Tank and Kovdor carbonatitic zircons. Increased Hree in rims ((lu/gd) n 43-112) relative to cores ((lu/gd) n 6-7.5) and the localized presence of xenotime are attributable to reactive, mineralizing fluid compositions enriched in Y, ree and P. Cathodoluminescence further reveals Hree fractionation in rims, evidenced by a narrow-band er 3+ emission at 405 nm. The extreme depletion of U in core and rim zircon is characteristic for this mineral deposit and is indicative of a persistent common source. U depletion is also a characteristic for zircons from carbonatitic or kimberlitic systems.232 Pb (SHrIMP II) geochronological data reveal the age of zircon cores as 1,325 ± 60 Ma and a rimalteration event as 455.6 ± 28.27 Ma. The combined findings are consistent with a protolithic igneous origin for zircon cores, from a period of intrusive, alkaline-carbonatitic magmatism. Fluid processes responsible for the ree-nb mineralizations affected zircon rim growth and degradation during the widely reported Caledonian events, providing a new example in a localized context of Hree enrichment processes.

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The Huogeqi Cu–Pb–Zn Deposit

Zhong

Chen

et al. 2021

Orogenic-Type Polymetallic Mineralization Associated With Multistage Orogenesis in Northern North China Plate

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Geological features and origin of gold deposits occurring in the Baotou–Bayan Obo district, south-central Inner Mongolia, People's Republic of China

Cited by 36 publications

References 20 publications

Intrusion‐Related Gold Deposits of North China Craton, People's Republic of China

Intrusion‐Related Gold Deposits of North China Craton, People's Republic of China

Zircon from the East Orebody of the Bayan Obo Fe–Nb–REE deposit, China, and SHRIMP ages for carbonatite-related magmatism and REE mineralization events

The Huogeqi Cu–Pb–Zn Deposit

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