A new type of Mo-bearing quartz vein by acid leaching: evidence from Dahu-Qinnan Mine, northern belt of the Xiaoqinling gold province, central China

ZHANG Yuanhou; MAO Jingwen; PIRAJNO Franco; LI Zongyan; QIAO Cuijie; ZHANG Xiaomin; HE Yue; ZHANG Shuaimin

doi:10.3969/j.issn.1673-9736.2020.04.02

PDF(2430 KB)

Global Geology ›› 2020, Vol. 23 ›› Issue (4) : 214-224. DOI: 10.3969/j.issn.1673-9736.2020.04.02

A new type of Mo-bearing quartz vein by acid leaching: evidence from Dahu-Qinnan Mine, northern belt of the Xiaoqinling gold province, central China

ZHANG Yuanhou¹, MAO Jingwen², PIRAJNO Franco³, LI Zongyan⁴, QIAO Cuijie⁴, ZHANG Xiaomin⁴, HE Yue⁴, ZHANG Shuaimin⁴

Author information +

History +

Abstract

Dahu-Qinnan molybdenum deposit, located in the northern part of the Xiaoqinling gold province, belongs to the Xiaoqinling-Waifangshan sub-zone of the eastern Qinling Mo-W metallogenic belt, central China. Molybdenite mineralization is associated with Au-bearing quartz veins. This paper is based on field observations and PIMA analytical data on the occurrences, and details textures and alteration patterns of Mo-bearing quartz veins in Dahu-Qinnan region. The Mo-bearing quartz veins exhibit friable with cream colored, vuggy, infilling texture and brecciated texture. The breccia clasts within Mo-bearing quartz veins are dominated by gneissic rocks of the Taihua Supergroup, and Mesozoic porphyritic granite dyke with stockwork and disseminated molybdenite mineralization. The breccias are replaced by clay minerals. Alteration associated with molybdenite-bearing quartz veins is characterized by K-feldspar (only in the breccias), sericite, sillicification (residual silica), kaolinite, smectite and anhydrite. Molybdenite with other sulfide minerals infills fissures and pore spaces in the quartz veins. As the results of above, and according to the observed geological events in the area and taking into account the geological setting, molybdenite-bearing quartz veins are likely to have been affected by late acid leaching. The precursor porphyry Mo ore, associated with porphyry granite dyke formed probably at ca. 245-211 Ma during the continent-continenl collision of Qinling orogeny.

Key words

Mo-bearing quartz vein / porphyry molybdenum body / acid leaching / Mesozoic / Dahu-Qinnan

Cite this article

EndNote

Ris (Procite)

Bibtex

Download Citations

ZHANG Yuanhou, MAO Jingwen, PIRAJNO Franco, LI Zongyan, QIAO Cuijie, ZHANG Xiaomin, HE Yue, ZHANG Shuaimin. A new type of Mo-bearing quartz vein by acid leaching: evidence from Dahu-Qinnan Mine, northern belt of the Xiaoqinling gold province, central China[J]. Global Geology. 2020, 23(4): 214-224 https://doi.org/10.3969/j.issn.1673-9736.2020.04.02

References

Chen Y J, Fu S G. 1992. Metallogenic regularities of gold deposits in the west of Henan Province. Beijing:Seismological Press, 1. (in Chinese)
Chen Y J, Pirajno F, Sui Y H. 2004. Isotope geochemistry of the Tieluping silver-lead deposit, Henan, China:a case study of orogenic silver-dominated deposits and related tectonic setting. Mineralium Deposita 39:560-575.
Hedenquist J, Arribas A. 2000. Exploration for epithermal gold deposits. Society of Economic Geologists Reviews, 13:245-277.
Hu S X, Lin Q L. 1988. The geology and metallogeny of the amalgamation zone between ancient North China Plate and South China Plate. Nanjing:Nanjing University Press, 1-107. (in Chinese)
Hu S X, Zhao Y Y, Xu J F, et al. 1997. Geology of gold mineralization of North China Platform by examples from southern, eastern and northeastern margin deposits. Beijing:Science Press, 1-220. (in Chinese)
Huang D H, Wang Y C, Nie F J, et al. 1985. A new type of molybdenum deposit-geological characteristics and metallogenic mechanism of the Huanglongpu carbonatite vein-type of molybdenum (lead) deposit, Shaanxi. Acta Geologica Sinica, 59(3):241-257 (in Chinese with English abstract)
Huang D H, Wu C Y, Du A D, et al. 1994. Re-Os isotopic ages of molybdenum deposits in east Qinling and their significance. Mineral Deposits, 13(4):221-230. (in Chinese with English abstract)
Kroner A, Compston W, Zhang G, et al. 1988. Age and tectonic setting of Late Archean greenstone-gneiss terrain in Henan Province, China, as revealed by single-grain zircon dating. Geology, 16:211-215.
Li H M, Ye H S, Mao J W, et al. 2007. Re-Os dating of molybdenites from Au (Mo) deposits in Xiaoqinling gold ore district and its geological significance. Mineral Deposits, 26(4):417-424. (in Chinese with English abstract)
Li H Q, Liu J Q, Wei L. 1993. Study on fluid inclusion chronology of hydrothermal deposits and its geological application. Beijing:Geological Publishing House, 92-105. (in Chinese)
Li S R, Li Q Z, Li W L. 1998. A new view on the genesis of the Xiaoqinling gold field. Gold Geology, 4(1):41-49. (in Chinese with English abstract)
Li S M,Qu L Q,Su Z B, et al. 1996,The geology and metallogenic prediction of the gold deposits in Xiaoqinling. Beijing:Geological Publishing House, 1-250. (in Chinese)
Li Y F, Mao J W, Bai F J, et al. 2003. Re-Os isotopic dating of molybdenites in the Nanihu molybdenum (tungsten) orefield in the eastern Qinling and its geological significance. Geological Review, 49(6):652-659. (in Chinese with English abstract)
Li Y F, Mao J W, Liu D Y, et al. 2005. SHRIMP zircon U-Pb and molybdenite Re-Os datings for the Leimengou porphyry Mo deposit, in western Henan Province, China and its geological implication. Geological Review, 52(1):122-131. (in Chinese with English abstract)
Luo M G, Zhang F M, Dong Q Y, et al. 1991. Molybdenum deposits in China. Zhengzhou:Henan Science and Technology Press, 1-452. (in Chinese)
Mao J W, Goldfarb R J. Zhang Z W, et al. 2002. Gold deposits in the Xiaoqinling-Xiong'ershan region, Qinling Mountains, central China. Mineralium Deposita, 37:306-325.
Mao J W, Xie G Q, Zhang Z H, et al. 2005. Mesozoic large-scale metallogenic pulses in North China and corresponding geodynamic setting. Acta Petrolei Sinica, 21(1):169-188. (in Chinese with English abstract)
Peng P, Zhai M G, Zhang H F, et al.2005. Geochronological constraints on the Paleoproterozoic evolution of the North China Craton:SHRIMP zircon ages of different types of mafic dikes. International Geology Review, 47:492-508.
Peng P, Zhai M G, Ernst R E, et al. 2008. A 1.78 Ga large igneous province in the North China Craton:the Xiong'er Volcanic province and the North China dyke swarm. Lithos, 101:260-280.
Pirajno F. 1992. Hydrothermal mineral deposits:principle and fundamental concepts for the exploration geologist. Berlin:Springer-Verlag, 1-709.
Rye O R, Bethke P, Masserman M D. 1992. The stable isotope geochemistry of acid sulfate alteration. Economic Geology, 87:225-262.
Schoen R, White D E, Hemley J J. 1974. Argillization by descending acid at Steamboat Spring, Nevada. Clays and Clay Minerals, 22:1-22.
Stein H J, Markey R J, Morgan J W, et al. 1997. Highly precise and accurate Re-Os ages for molybdenite from the East Qinling molybdenum belt, Shaanxi Province, China. Economic Geology, 92:827-835
Sun D Z, Hu W X, Min T, et al. 1990. Origin of Late Archean and Early Proterozoic rocks and associated mineral deposits from the Zhongtiao mountains, east-central China. Precambrian Research, 47:287-306.
Wang Y T, Mao J W, Lu X X, et al. 2002. ⁴⁰Ar-³⁹Ar dating and geological implication of auriferous altered rocks from the middle-deep section of Q875 gold quartzvein in Xiaoqinling area, Henan, China. Chinese Science Bulletin, 47(20):1750-1755. (in Chinese)
Xue F, Kroner A, Reischmann T, et al. 1996. Paleozoic pre-and post-collision calc-alkaline magmatism in the Qinling orogenic belt, central China, as documented by zircon ages on granitoid rocks. Journal of Geological Society London, 153:406-417.
Yang J H, Wu F Y, Wilde S A. 2003. A review of the geodynamic setting of large scale Late Mesozoic gold mineralization in the North China Craton:an association with lithospheric thinning. Ore Geology Reviews, 23:125-152.
Ye H S, Mao J W, Li Y F, et al. 2006. SHRIMP zircon U-Pb and molybdenite Re-Os dating for the superlarge Donggou porphyry Mo deposit in East Qinling, China, and its geological implication. Acta Geologica Sinica (Chinese Edition), 80(7):1078-1088 (in Chinese with English abstract)
Zhai M G. 2004. Precambrian tectonic evolution of the North China Craton. Geological Society, London, Special Publication, 226:57-72.
Zhang G W, Meng Q R, Yu Z, et al. 1996. Orogenic process of Qinling orogenic belt and its geodynamics. Science in China (Series D), 26(3):193-200. (in Chinese)
Zhao T P, Zhou M F, Zhai M G, et al. 2002. Paleoproterozoic rift-related volcanism of the Xiong'er Group, North China Craton:implications for the breakup of Columbia. International Geology Review, 44:336-351.
Zhang Z W, Zhu B Q, Chang X Y, et al. 2001. Petrogenetic-metallogenetic background and time-space relationship of the East Qinling molybdenum ore belt, China. Geological Journal of China University, 7(3):307-315, (in Chinese with English abstract)
Zhou Z X, Li B L, Guo K H. 1993. Genesis of gold (molybdenum) deposits in south margin of the North China Craton. Beijing:Seismological Press, 1-268. (in Chinese)