Abstract
Zhenyuan gold deposit is the largest super large gold deposit in the Ailaoshan gold belt, but its precise mineralization age is still lack. Re-Os isotopic age of the auriferous pyrite from the Zhenyuan gold deposit was determined by using a high-resolution inductively coupled plasma mass spectrometry (HR-ICP-MS). The pyrite samples were decomposed in carius tubes, Os was separated by distillation and Re was extracted by acetone, respectively. The results show that the Re-Os isochron age is 229±38 Ma (MSWD=2.0, confidence level is 95%), with an initial 187Os/188Os value of 0.68±0.24 and a corresponding γOs value of 442±91. The Re/Os ratios of the pyrite vary from 40.8 to 100.5. The data suggest that at least one important ore-forming event was occurred during Indosinian epoch, and the ore-forming materials probably derived from mixed sources of crustal and mantle, while the later dominated. The Ailaoshan composite orogen experienced complicated evolutional processes, including formation of Precambrian-Early Paleozoic basement, subduction and orogenesis of Late Paleozoic era, collisional orogenesis of Late Hercynian-Indosinain epoch, and extensional or striking orogenesis of Yanshainan-Cenozoic epoch. The polycycle tectonic evolution and magmatism in this area caused multi-stage and superposition metallization characteristics of the Zhenyuan gold deposit: the mineralization probably occur mainly during the Indosinian collisional orogeny, while the minor gold ores of altered granite-porphyry and altered lamprophyre may be formed in the late superposition metallization.
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References
Hu Y Z, Tang S C, Wang H P, et al. Geology of Gold Deposits in Ailaoshan (in Chinese). Beijing: Geological Publishing House, 1995. 106–250
He W J. Characteristic of the lamprophyre and the relation with gold mineralization in Zhenyuan gold field (in Chinese). Yunnan Geol, 1993, 12: 148–158
Tang S C, Li J D, He S X. On metallogenic regularity of gold metallogenic belts in northern section of Ailao mountain (in Chinese). Yunnan Geol, 1991, 10: 44–70
Ren S L, Qin G J, Chi S C, et al. Au origin of Laowangzhai-Donggualin gold deposit, Zhenyuan County, Yunnan Province (in Chinese). Earth Sci, 1995, 20: 47–52
Shen S Y, Wei Q R, Cheng H L, et al. An approach to genetic types of the gold deposits in the Ailaoshan gold ore belt, Yunnan (in Chinese). Tethy Geol, 1997, 21: 73–84
Yang X H. A study on the genesis of Laowangzhai gold deposit of structural altered rock type in Zhenyuan County (in Chinese). Yunnan Geol, 2005, 24: 371–378
Tian N, Yang Y Q. Geology, geochemistry and genesis of gold deposits in ophiolitic melange in northern Ailao mountain, Yunnan (in Chinese). Contrib Geol Qinghai-Tibet Plat, 1991, 21: 84–97
Li D M, Li B H. The mineralization of the gold deposits in the Ailao mountain, Yunnan (in Chinese). Sediment Geol Tethy Geol, 2000, 20: 60–77
Bian Q T. Study of the relationship between crust-mantle structure and formation of Laowangzhai gold deposit (in Chinese). Sci China Ser D-Earth Sci, 1998, 28: 303–309
Yu G J. Types and ore-controlling conditions of primary gold deposits in the Ailaoshan gold ore belt (in Chinese). Geol Prosp, 1990, 26: 3–11
Ge L S, Deng J, Yang L Q, et al. Evolution of tectonic environment and gold-polymetal metallogenic system in Ailaoshan ore concentration region, Yunnan Province, China (in Chinese). Acta Petrol Sin, 2010, 26: 1699–1722
Ge L S, Deng J, Guo X D, et al. Deep-seated structure and metallogenic dynamics of the Ailaoshan polymetallic mineralization concentration area, Yunnan Province, China. Sci China Ser D-Earth Sci, 2009, 52: 1624–1640
Du A D, He H L, Yin W N, et al. A study on the Rhenium-Osmium geochronometry of molybdenites (in Chinese). Acta Geol Sin, 1994, 68: 339–347
Yang S H, Qu W J, Yang G, et al. The correction of mass fractionation in the measurement of Rhenium and Osmium isotope ration by ICP-MS (in Chinese). Rock Miner Anal, 2007, 26: 4–8
Li C, Qu W J, Du A D, et al. Comprehensive study on extraction of Rhenium with acetone in Re-Os isotopic dating (in Chinese). Rock Miner Anal, 2009, 28: 233–238
Zhao K D, Jiang S Y. Direct isotope dating for metallic ore deposits (in Chinese). Earth Sci Front, 2004, 11: 425–434
Du A D, Qu W J, Li C, et al. A review on the development of Re-Os isotopic dating methods and techniques (in Chinese). Rock Miner Anal, 2009, 28: 288–304
Jin X D, Li W J, Wu H Y, et al. Development of Re-Os isotopic dating analytical technique and determination know-how on ICP-MS precise dating for molybdenite (in Chinese). Acta Petrol Sin, 2010, 26: 1617–1624
Jiang S Y, Yang J H, Zhao K D, et al. Re-Os isotope tracer and dating methods in ore deposits research (in Chinese). J Nanjing Univ, 2000, 36: 669–677
Yu G, Yang G, Chen J F, et al. Re-Os dating of auriferous arsenopyrite of the Maoling gold deposit, Liaoning Province, Northeast China and its geological significance. Chin Sci Bull, 2005, 50: 1509–1514
Feng C Y, Qu W J, Zhang D Q, et al. Re-Os dating of pyrite from the Tuolugou stratabound Co (Au) deposit, eastern Kunlun orogenic belt, northwestern China. Ore Geol Rev, 2009, 36: 213–220
Shi G Y, Sun X M, Wang S W, et al. Re-Os isotopic dating and its geological implication of Baimazhai Cu-Ni sulphide deposit, Yunnan Province, China (in Chinese). Acta Petrol Sin, 2006, 22: 2451–2456
Chen M H, Mao J W, Qu W J, et al. Re-Os dating of arsenian pyrites from the Lannigou gold deposit, Zhenfeng, Guizhou Province, and its geological significances (in Chinese). Geol Rev, 2007, 53: 371–382
Liu Y L, Yang G, Chen J F, et al. Re-Os dating of the pyrite from Baiyunebo super REE-Nb-Fe deposit (in Chinese). Chin Sci Bull, 2004, 49: 2627–2631
Yang G, Chen J F, Du A D, et al. Re-Os dating of Mo-bearing black shale of the Laoyaling deposit, Tongling, Anhui Province, China. Chin Sci Bull, 2004, 49: 1396–1400
Wang D H, Qu W J, Li Z W, et al. The ore-forming centralism time of porphyry copper-molybdenum deposit in Jinsha River-Red River ore-forming belt: Re-Os isotope dating. Sci China Ser D-Earth Sci, 2005, 48: 192–198
Xie J C, Yang X Y, Du J G, et al. Re-Os precise dating of pyrite from the Xinqiao Cu-Au-Fe-S deposit in Tongling, Anhui and its implications for mineralization (in Chinese). Chin J Geol, 2009, 44: 183–192
Selby D, Kelley K D, Hitzama M W, et al. Re-Os sulfide (bornite, chalcopyrite, and pyrite) systematics of the carbonate-hosted copper deposit at Ruby Creek, southern Brooks range, Alaska. Econ Geol, 2009, 104: 437–444
Stein H J, Morgan J W, Scherstén A. Re-Os dating of low-level highly radiogenic (LLHR) sulfides: The Harnasgold deposit, southwest Sweden, records continental-scale tectonic events. Econ Geol, 2000, 95: 1657–1671
Yang L Q, Deng J, Zhao K, et al. Tecono-thermochronology and gold mineralization events of orogenic gold deposits in Ailaoshan orogenic belt, southwest China: Geochronological constraints (in Chinese). Acta Petrol Sin, 2011, 27: 2519–2532
Yang L Q, Liu J T, Zhang Q, et al. Superimposed orogenesis and metallogenesis: An example from the orogenic gold deposits in Ailaoshan gold belt, Southwest China (in Chinese). Acta Petrol Sin, 2010, 26: 1723–1739
Bi X W, Hu R Z, He M Y. ESR dating and its geological implication of Ailaoshan gold ore belt (in Chinese). Chin Sci Bull (Chin Ver), 1996, 41: 1301–1303
Bi X W, Hu R Z, He M Y. The discussion about metallogenic age and metallogenic mechanism of the Ailaoshan gold ore belt (in Chinese). Geol Geochem, 1996, 24: 16–19
He M Y, Hu R Z. A study on genesis of the Laowangzhai gold deposit (in Chinese). Comput Tech Geophys Geochem Explor, 1996, 18: 17–20
Wang J H, Qi L, Yin A, et al. Emplacement age and PGE geochemistry of lamprophyres in the Laowangzhai gold deposit, Yunnan, SW China. Sci China Ser D-Earth Sci, 2001, 31(Suppl): 146–154
Wei J H, Liu C Q, Liu G C. Method of dating of gold deposit and the related problems (in Chinese). Earth Sci Front, 2003, 10: 319–326
Huang Z L, Liu C Q, Song C M, et al. Origin of the Lamprophyres and Their Relationship with Gold Ore in Laowangzhai Gold Deposit (in Chinese). Beijing: Geological Publishing House, 1999. 106–250
Zhu G T, Zhu S R. Discussion on lamprophyres and their relations to mineralization of gold deposits (in Chinese). Mineral Resour Geol, 1996, 10: 368–376
Zhang Z L, Zhang S F, Yuan H H, et al. An isotope geology and orogin study of the Jinchang gold deposit, Mojiang, Yunnan (in Chinese). J Chendu College Geol, 1987, 14: 29–41
Chen J R, Cui X B, Wu Y H, et al. Study on the diagenetic and metallogenic age of Jinchang gold deposit in Mojiang, Yunnan (in Chinese). Gold Geol, 2002, 8: 1–5
Lambert D D, Frick L R, Foster J G, et al. Re-Os isotope systematic of the Voisey’s Bay Ni-Cu-Co magmatic sulfide system, Labrador, Canada: II. Implications for parental magma chemistry, oregenesis, and metal redistribution. Econ Geol, 2000, 5: 867–888
Zhang Z B, Liu F G, Bao J F. The structural evolution of Ailaoshan orogen (in Chinese). Yunnan Geol, 2005, 24: 137–141
Fan W M, Peng T P, Wang Y J. Triassic magmatism in the southern Lancangjiang zone, southwestern China and its constraints on the tectonic evolution of Paleo-Tethys (in Chinese). Earth Sci Front, 2009, 16: 291–301
Mo X X, Pan G T. From the Tethys to the formation of the Qinhai-Tibet Plateau: Constrained by tectono-magmatic events (in Chinese). Earth Sci Front, 2006, 13: 43–51
Jian P, Wang X F, He L Q, et al. U-Pb zircon dating of the Shuanggou ophiolite from Xinping County, Yunnan Province (in Chinese). Acta Petrol Sin, 1998, 4: 207–211
Jian P, Liu D Y, Sun X M. SHRIMP dating of Carboniferous Jinshajiang ophiolite, China: Geochronological constraints for the evolution of Paleo-Tethys oceanic floor (in Chinese). Acta Geol Sin, 2003, 77: 1–13
Liang Y H, Sun X M, Shi G Y, et al. Ore-forming fluid geochemistry and genesis of Laowangzhai large scale orogenic gold deposit in Ailaoshan gold belt, Yunnan province, China (in Chinese). Acta Petrol Sin, 2011, 27: 2533–2540
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Shi, G., Sun, X., Pan, W. et al. Re-Os dating of auriferous pyrite from the Zhenyuan super-large gold deposit in Ailaoshan gold belt, Yunnan Province, Southwestern China. Chin. Sci. Bull. 57, 4578–4586 (2012). https://doi.org/10.1007/s11434-012-5275-z
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DOI: https://doi.org/10.1007/s11434-012-5275-z