Geological features and geodynamic settings of the Mo deposits in the northern segment of the Dabie Mountains
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摘要:
大别造山带北麓新发现有大、中型钼矿床(点) 十余个，是继东秦岭和东北钼矿带后又一重要钼金属矿集区。本文总结了大别山北麓钼矿床的地质特征，包括时空分布、成因类型等。大别山地区的钼矿床多沿NW向区域性断裂构造带发育，集中于晓天-磨子潭断裂以北；矿床产出受NW向与NE向断裂交汇部位控制，对赋矿围岩无选择性。钼矿化与燕山期高钾花岗质斑岩体密切相关，矿体产于岩体内部和/或接触带围岩中。矿化类型以斑岩型为主，次为矽卡岩型、热液脉型及爆破角砾岩型。成矿过程普遍具有四阶段性，成矿流体以高温、高盐度、富CO2为普遍特征。辉钼矿Re-Os同位素年龄集中于110~130Ma，且从西向东变新；钼矿床和相关花岗岩类侵入体形成于岩石圈碰撞缩短加厚之后的伸展减薄地球动力学背景。
Abstract:The northern Dabie Mountains in China, hosting more than ten Mo deposits, is another molybdenum belt in China besides the East Qinling Mo belt and the northeast Mo belt. In this paper, we summarize the geological features of Mo deposits in the northern Dabie Mountains, including spatial and temporal distribution, genetic classification, geological and geochemical characters. The Mo deposits mainly occur along the regional EW-trending faults, but in the north of the Xiaotian-Mozitan fault. The location of Mo deposit is controlled by NW-and NE-trending faults, without any preference to host-rocks. Mo mineralization is generally associated with the Yanshanian high-K granitic porphyries, with orebodies being located in the porphyritic intrusions and/or host-rocks at contact zones. Genetically, four types of Mo mineralization can be recognized, i.e. porphyry, breccias, skarn and hydrothermal vein, with porphyry as the dominant. A four stage hydrothermal ore-forming process is common, and the fluids are featured by high temperature, high salinity and CO2-rich. The majority of available molybdenite Re-Os isotopic ages are between 110Ma and 130Ma, younging eastwardly. The Mo deposits and their related granitic intrusions were formed under a geodynamic setting associated with lithosphere extension and thinning after collisional shortening and thickening.
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Key words:
- Mo deposit /
- Ore geology /
- Metallogenic time /
- Geodynamic setting /
- Northern Dabie Mountains
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图 1
大别山区钼矿床空间分布略图(据王运等, 2009修改)
Figure 1.
Schematic map showing the geology and distribution of Mo deposits in Dabie Mountains (modified after Wang et al., 2009)
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Chen LJ and Chen P. 2011. Study on geological characteristics and ore-controlling factors of Yaochong molybdenum deposit in Xinxian County, Henan Province. Contributions to Geology and Mineral Resources Research, 26(4): 385-392 (in Chinese with English abstract)
Chen W, Li HC, Xu ZW, He YL, Chen JQ, Wang SH and Wang H. 2011. Sources of ore-forming material and formational mechanism of the Baoanzhai Mo deposit, Xinxian County, Henan Province. Acta Mineralogica Sinica, 12(Suppl.): 12-13 (in Chinese with English abstract)
Chen YJ and Fu SG. 1992. Gold Mineralization in West Henan. Beijing: Seismological Press, 1-234 (in Chinese with English abstract)
Chen YJ, Li C, Zhang J, Li Z and Wang HH. 2000. Sr and O isotopic characteristics of porphyries in the Qinling molybdenum deposit belt and their implication to genetic mechanism and type. Science in China (Series D), 43(Suppl.): 82-94
Chen YJ, Sui YH and Pirajno F. 2003. Exclusive evidences for CMF model and a case of orogenic silver deposits: Isotope geochemistry of the Tieluping silver deposit, east Qinling orogen. Acta Petrologica Sinica, 19(3): 551-568 (in Chinese with English abstract)
Chen YJ, Chen HY, Zaw K, Pirajno F and Zhang ZJ. 2007. Geodynamic settings and tectonic model of skarn gold deposits in China: An overview. Ore Geology Reviews, 31(1-4): 139-169
Chen YJ, Ni P, Fan HR, Pirajno F, Lai Y, Su WC and Zhang H. 2007. Diagnostic fluid inclusions of different types hydrothermal gold deposits. Acta Petrologica Sinica, 23(9): 2085-2108 (in Chinese with English abstract)
Chen YJ and Li N. 2009. Nature of ore-fluids of intracontinental intrusion-related hypothermal deposits and its difference from those in island arcs. Acta Petrologica Sinica, 25(10): 2477-2508 (in Chinese with English abstract)
Chen YJ, Zhai MG and Jiang SY. 2009. Significant achievement and open issues in study of orogenesis and metallogenesis surrounding the North China continent. Acta Petrologica Sinica, 25(11): 2695-2726 (in Chinese with English abstract)
Chen YJ and Wang Y. 2011. Fluid inclusion study of the Tangjiaping Mo deposit, Dabie Shan, Henan Province: Implications for the nature of the porphyry systems of post-collisional tectonic settings. International Geology Review, 53(5-6): 635-655
Chen YJ, Zhang C, Li N, Yang YF and Deng K. 2012. Geology of the Mo deposits in Northeast China. Journal of Jilin University (Earth Science Edition), 42(5): 1223-1268 (in Chinese with English abstract)
Gao LD and Liu ZG. 1988. The discovery of micro-fossil from the Nanwan Formation of the Xinyang Group and its geological implications. Geological Review, 34(5): 421-422 (in Chinese with English abstract)
Guo TP. 2007. Geochemical characteristics and ore-prospecting criteria of the Tianmushan molybdenum ore district. Geophysics & Geochemical Exploration, 31(4): 309-312 (in Chinese with English abstract)
Hu SX, Lin QL, Chen ZM and Li SM. 1988. Geology and Metallogeny of the Collision Belt between the North and the South China Plates. Nanjing: Nanjing University Press, 1-558 (in Chinese)
Huang F, Wang DH, Lu SM, Chen YC, Wang BH and Li C. 2011. Molybdenite Re-Os isotopic age of Shapinggou Mo deposit in Auhui Province and Mesozoic Mo ore-forming stages in East Qinling-Dabie Mountain region. Mineral Deposits, 30(6): 1039-1057 (in Chinese with English abstract)
Li C and Chen YJ. 2002. A review on petrologic evidences for Mesozoic lithosphere delamination in East Qinling-Dabie Mountains. Acta Scientiarum Naturalium Universitatis Pekinensis, 38(3): 431-441(in Chinese with English abstract)
Li FL. 2011. Geological characteristics and metallogenic epoch of Qianechong large-size porphyry Mo deposit at the northern foot of Dabie Mountains, Henan Province. Mineral Deposits, 30(3): 457-468 (in Chinese with English abstract)
Li HC, Xu ZW, Lu XC, Wang XD, Chen W and Zhai DX. 2010. Study on fluid inclusions of the Dayinjian Mo deposit in Xinxian County, Henan Province, China. Geological Journal of China Universities, 16(2): 236-246 (in Chinese with English abstract)
Li HC, Xu ZW, Lu XC, Chen W, Qu WJ, Fu B, Yang XN, Yang J and Chen JQ. 2012. Constraints on timing and origin of the Dayinjian intrusion and associated molybdenum mineralization, western Dabie orogen, central China. International Geology Reviews, 54(13): 1579-1596
Li JP, Li YF, Luo ZC and Xie KJ. 2011. Geological features of molybdenum deposits and ore prospecting in northern slope of the Dabie Mountain, China. Geotectonica et Metallogenia, 35(4): 576-586 (in Chinese with English abstract)
Li ML. 2009. Characteristics of intermediate-acid small intrusive bodies and metallogenic system of molybdenum-polymetallic deposits in Mesozoic in Dabie Mountain, Henan Province. Ph. D. Dissertation. Beijing: China University of Geoscience, 1-147 (in Chinese with English summary)
Li N, Chen YJ, Zhang H, Zhao TP, Deng XH, Wang Y and Ni ZY. 2007. Molybdenum deposits in East Qinling. Earth Science Frontiers, 14(5): 186-198 (in Chinese with English abstract)
Liu FL and Xue HM. 2007. Review and prospect of SHRIMP U-Pb dating on zircons from Sulu-Dabie UHP metamorphic rocks. Acta Petrologica Sinica, 23(11): 2737-2756 (in Chinese with English abstract)
Luo YN, Chen JW and Tang ZG. 2012. Geological features and genesis for the Doupo Mo deposit in Luoshan, Henan. Acta Geologica Sichuan, 32(3): 278-280 (in Chinese with English abstract)
Luo ZC. 2010. Metallogenic regularity and prospecting direction of Mo-Au-Ag polymetallic deposit of north piedmont of Dabieshan. Mineral Resources and Geology, 24(2): 125-131 (in Chinese with English abstract)
Luo ZC, Li YF, Wang YT and Wang XG. 2010. The molybdenite Re-Os age of Dayinjian molybdenum deposit in the northern margin of the Dabie Mountain, Xinxian area, Henan, China and its significance. Geological Bulletin of China, 29(9): 1349-1354 (in Chinese with English abstract)
Mao JW, Xie GQ, Bierlein F, Qu WJ, Du AD, Ye HS, Pirajno F, Li HM, Guo BJ, Li YF and Yang ZQ. 2008. Tectonic implications from Re-Os dating of Mesozoic molybdenum deposits in the East Qinling-Dabie orogenic belt. Geochimica et Cosmochimica Acta, 72(16): 4607-4626
Meng F, Ouyang ZZ and Luo YN. 2012. Geological characteristics and geodynamic setting of the Xiaofang molybdenum deposit in Henan Province. Geology and Resources, 21(4): 400-405 (in Chinese with English abstract)
Meng XJ, Xu WY, Lü QT, Qu WJ, Li XC, Shi DF and Wen CH. 2012. Zircon U-Pb dating of ore-bearing rocks and molybdenite Re-Os age in Shapinggou porphyry molybdenum deposit, Anhui Province. Acta Geologica Sinica, 86(3): 486-494 (in Chinese with English abstract)
Ren JS. 1991. The basic characteristics of the tectonic evolution of the continental lithosphere in China. Regional Geology of China, (4): 289-293 (in Chinese with English abstract)
Shi Y, Yu JH, Xu XS, Qiu JS and Chen LH. 2009. Geochronology and geochemistry of the Qinling Group in the eastern Qinling Orogen. Acta Petrologica Sinica, 25(10): 2651-2670 (in Chinese with English abstract)
Wang P, Chen YJ, Mei M, Li ZL and Wang LJ. 2013. Fluid evolution in the Yaochong porphyry Mo deposit, Dabie Shan, China. Acta Petrologica Sinica, 29(1): 107-120 (in Chinese with English abstract)
Wang QC and Cong BL. 1998. Tectonic framework of the ultrahigh-pressure metamorphic zone from the Dabie Mountains. Acta Petrologica Sinica, 14(4): 481-492 (in Chinese with English abstract)
Wang Y, Chen YJ, Ma HW and Xu YL. 2009. Study on ore geology and fluid inclusions of the Tangjiaping Mo deposit, Shangcheng County, Henan Province. Acta Petrologica Sinica, 25(2): 468-480 (in Chinese with English abstract)
Wang YS, Zhu G, Wang DX, Liu GS and Song CZ. 2004. Relation between P-T conditions of two phases of Tanlu strike-slip shear zones and delamination of the orogenic belts on the eastern margin of the Dabie Mountains. Geotectonica et Metallogenia, 28(3): 228-238 (in Chinese with English abstract)
Wei QG, Gao XY, Zhao TP, Chen W and Yang YH. 2010. Petrogenesis of Tangjiaping granite porphyry in northern Dabie: Evidence from zircon LA-ICPMS U-Pb dating and geochemical characteristics. Acta Petrologica Sinica, 26(5): 1550-1562 (in Chinese with English abstract)
Xu XC, Lou JW, Lu SM, Xie QQ, Chu PL and Yin T. 2009. Re-Os ages of molybdenum-lead-zinc polymetallic deposits and 40Ar/39Ar of related magmatic rocks in Yinshan area, Jinzhai, Anhui Province. Mineral Deposits, 28(5): 621-632 (in Chinese with English abstract)
Xu XC, Lou JW, Xie QQ, Xiao QX, Liang JF and Lu SM. 2011. Geochronology and tectonic setting of Pb-Zn-Mo deposits and related igneous rocks in the Yinshan region, Jinzhai, Anhui Province, China. Ore Geology Reviews, 43(1): 132-141
Xu YL. 2011. Geologic characteristics and its significance for ore-prospecting of molybdenum deposit in Mushan, Luoshan County, Henan Province. Mineral Resources and Geology, 25(5): 380-384 (in Chinese with English abstract)
Yang MZ, Zeng JN, Qin YJ, Li FL and Wan SQ. 2010. LA-ICP-MS zircon U-Pb and molybdenite Re-Os dating for Qian’echong porphyry-type Mo deposit in northern Dabie, China, and its geological significance. Geological Science and Technology Information, 29(5): 35-45 (in Chinese with English abstract)
Yang MZ, Zeng JN, Li FL, Pan SD, Lu JP and Ren AQ. 2011a. Geochemistry of mineralization and granitic magmatism of Dayinjian Mo deposit, Xinxian County, Henan Province and its geological significance. Acta Geologica Sinica, 32(3): 279-292 (in Chinese with English abstract)
Yang MZ, Zeng JN, Ren AQ, Lu JP and Pan SD. 2011b. Characteristics of Mo mineralization and zircon LA-ICP-MS U-Pb geochronology of Mushan Mo deposit from Luoshan County, Henan Province. Mineral Deposits, 30(3): 435-447 (in Chinese with English abstract)
Yang Y, Zhang J, Liu JJ, Sun YL, Li J and Yang ZQ. 2008. Hydrothermal metallogeny of the Tangjiaping molybdenum deposit, Henan Province. Geology in China, 35(6): 1240-1249 (in Chinese with English abstract)
Yang YF, Chen YJ, Li N, Mi M, Xu YL, Li FL and Wan SQ. 2013. Fluid inclusion and isotope geochemisty of the Qian’echong giant porphyry Mo deposit, Dabie Shan, China: A case of NaCl-poor, CO2-rich fluid systems. Journal of Geochemical Exploration, 124: 1-13
Yang ZQ. 2007a. Re-Os isotopic ages of Tangjiaping molybdenum deposit in Shangcheng County, Henan and their geological significance. Mineral Deposits, 26(3): 289-295 (in Chinese with English abstract)
Yang ZQ. 2007b. Wallrock alteration and mineralization in the Tangjiaping Mo deposit of Shangcheng County, Henan Province. Geology and Prospecting, 43(5): 17-22 (in Chinese with English abstract)
Yao SZ, Ding ZJ, Zhou ZG and Chen SY. 2002. Metallogenic systems of Qinling Orogen. Earth Science, 27(5): 599-604 (in Chinese with English abstract)
Ye BD, Xu JW, Li ZC, Cui F and Jian P. 1991. Discovery of animal fossils in the Suijiahe Group in the Tongbo-Dabie region and its significance. Geology in China, (3): 28-29 (in Chinese with English abstract)
Yu W, Ni P, Wang GG, Shang L, Jiang LL, Wang BH and Zhang HD. 2012. Evolution of ore-forming fluids of the Shapinggou porphyry molybdenum deposit, Jinzhai, Anhui Province. Journal of Nanjing University (Natural Sciences), 48(3): 240-255 (in Chinese with English abstract)
Zhai MG. 2008. State of lithosphere beneath the North China Craton before the Mesozoic lithospheric disruption: A suggestion. Geotectonica et Metallogenia, 32(4): 516-520 (in Chinese with English abstract)
Zhang GW, Zhang BR, Yuan XC and Xiao QH. 2001. Qinling Orogenic Belt and Continental Dynamics. Beijing: Science Press, 1-855 (in Chinese)
Zhang H, Sun WD, Yang XY, Liang HY, Wang BH, Wang RL and Wang YX. 2011. Geochronology and metallogenesis of the Shapinggou giant porphyry molybdenum deposit in the Dabie orogenic belt. Acta Geologica Sinica, 85(12): 2039-2059 (in Chinese with English abstract)
Zhang HD, Shi DF, Hao YJ and Wang BH. 2010. Geological features of the Shapinggou porphyry molybdenum ore deposit, Jinzhai County, Henan Province. Geology of Anhui, 20(2): 104-108 (in Chinese with English abstract)
Zhang J, Chen YJ, Yang Y and Deng J. 2011. Lead isotope systematics of the Weishancheng Au-Ag belt, Tongbai Mountains, central China: Implication for ore genesis. International Geology Review, 53(5-6): 656-676
Zhang KJ. 1997. North and South China collision along the eastern and southern North China margins. Tectonophysics, 270(1-2): 145-156
Zhao ZF, Zheng YF, Wei CS and Wu YB. 2003. Zircon U-Pb age, element and isotope geochemistry of Mesozoic mafic-ultramafic rocks at Shacun and Jiaoziyan in North Dabie. Geological Journal of China Universities, 9(2): 139-162 (in Chinese with English abstract)
Zhao ZF, Zheng YF, Wei CS, Wu YB, Chen FK and Jahn BM. 2005. Zircon U-Pb age, element and C-O isotope geochemistry of post-collisional mafic-ultramafic rocks from the Dabie orogen in east-central China. Lithos, 83(1-2): 1-28
Zhao ZF, Zheng YF, Wei CS and Wu YB. 2007. Post-collisional granitoids from the Dabie orogen in China: Zircon U-Pb age, element and O isotope evidence for recycling of subducted continental crust. Lithos, 93(3-4): 248-272
Zhao ZF and Zheng YF. 2009. Remelting of subducted continental lithosphere: Petrogenesis of Mesozoic magmatic rocks in the Dabie-Sulu orogenic belt. Science in China (Series D), 39(7): 888-909 (in Chinese)
Zheng YF, Fu B, Gong B and Li L. 2003. Stable isotope geochemistry of ultrahigh pressure metamorphic rocks from the Dabie-Sulu orogen in China: Implications for geodynamics and fluid regime. Earth Science Reviews, 62(1-2): 105-161
Zheng YF, Zhou JB, Wu YB and Xie Z. 2005. Low-grade metamorphic rocks in the Dabie-Sulu orogenic belt: A passive-margin accretionary wedge deformed during continent subduction. International Geology Review, 47(8): 851-871
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