Porphyry Cu-Mo deposits in the eastern Xing’an-Mongolian Orogenic Belt: Mineralization ages and their geodynamic implications
Tóm tắt
The eastern Xing’an-Mongolian (Xing-Meng) Orogenic Belt (XMOB) is one of the important areas of porphyry copper (Cu)-molybdenum (Mo) deposits in China. However, studies on the exact ages of mineralization and their geodynamic significance are very limited. In this study, granodioritic rocks from the Duobaoshan Cu deposit and Daheishan Mo deposit were selected to make zircon SHRIMP U-Pb analyses in order to constrain their mineralization ages. Geochronological data indicate that two episodes of mineralization took place in the Duobaoshan Cu deposits. The granodiorite related to the Duobaoshan porphyry Cu deposit was formed in the Early Paleozoic with zircon U-Pb age of 485±8 Ma, whereas the granodiorites related to the Sankuanggou skarn-type Cu deposit were emplaced in the Jurassic with zircon U-Pb ages of 176±3 and 177±3 Ma. In the Daheishan area of Jilin Province, the emplacement age of the granodiorite porphyry related to the porphyry Mo deposit was dated at 170±3 Ma, and the unmineralized monzogranite at 178±3 Ma. Therefore, two episodes of Cu-Mo mineralization were developed in the eastern XMOB, at ∼485 Ma and ∼175 Ma, respectively. Based on the geological history and spatial-temporal distribution of the granitoids in northeastern (NE) China, it is proposed that the Duobaoshan Cu deposit was related to the collision of the Xing’an and Erguna blocks in the Early Paleozoic, and the Sankuanggou Cu and Daheishan Mo deposits were related to subduction of the Paleo-Pacific plate during the Jurassic.
Tài liệu tham khảo
Sillitoe R H. Characteristics and controls of the largest porphyry copper-gold and epithermal gold deposits in the circum-Pacific region. Australian J Earth Sci, 1997, 44: 373–388
Oyarzun R, Marquez A, Lillo J, et al. Giant vs. small porphyry copper deposits of Cenozoic age in northern Chile: adakitic vs. normal calc-alkaline magmatism. Mineral Deposit, 2001, 36: 794–798
Cooke D R, Hollings P, Walshe J L. Giant porphyry deposits: characteristics, distribution, and tectonic controls. Econ Geol, 2005, 100: 801–818
Rui Z Y, Huang C K, Qi G M, et al. Porphyry Copper (molybdenum) Deposits of China (in Chinese with English abstract). Beijing: Geological Publishing House, 1984. 1–350
Du Q, Zhao Y M, Lu B Z, et al. Geology of Duobaoshan Porphyry Copper Deposit (in Chinese with English abstract). Beijing: Geological Publishing House, 1988. 1–386
Liu C, Mu Z G, Liu R X, et al. 40Ar/39Ar laser microprobe dating on hydrothermal minerals from Duobaoshan porphyry copper mining district, Heilongjiang Province, China. Sci Geol Sin (in Chinese with English abstract), 1995, 30(4): 329–337
Zhao Y M, Bi C S, Zou X Q, et al. The Re-Os isotopic age of Molybdenite from Duobaoshan and Tongshan porphyry copper (Molybdenum) deposits. Acta Geosci Sin (in Chinese with English abstract), 1997, 18(1): 61–67
Wu F Y, Jahn B M, Wilde S A, et al. Phanerozoic continental crustal growth: U-Pb and Sr-Nd isotopic evidence from the granites in northeastern China. Tectonophysics, 2000, 328: 89–113
Wu F Y, Sun D Y, Li H M, et al. A-type granites in Northeastern China: Age and geochemical constraints on their petrogenesis. Chem Geol, 2002, 187: 143–173
Wu F Y, Jahn B M, Wilde S A, et al. Highly fractionated I-type granites in NE China (I): Geochronology and petrogenesis. Lithos, 2003, 66: 241–273
Defant M J, Drummond M S. Derivation of some modern arc magmas by young subduction lithosphere. Nature, 1990, 347: 662–665
Zhang Q, Qin K Z, Wang Y L, et al. Study on adakite broadened to challenge the Cu and Au exploration in China. Acta Petrol Sin (in Chinese with English abstract), 2004, 20(2): 195–204
Song B, Zhang Y H, Wan Y S, et al. Mount making and procedure of SHRIMP dating. Geol Rev (in Chinese with English abstract), 2002, 48(Suppl): 26–30
Williams I S, Claesson S. Isotope evidence for the Precambrian province and Caledonian metamorphism of high grade paragneiss from the Seve Nappes, Scandinavian Caledonides, II. Ion microprobe zircon U-Th-Pb. Contrib Mineral Petrol, 1987, 97: 205–217
Miao L C, Fan W M, Zhang F Q, et al. Zircon SHRIMP geochronology of the Xinkailing-Kele complex in the northwestern Lesser Xing’an Range, and its geological implications. Chin Sci Bull, 2004, 49(18): 2201–2209
Ge W C, Wu F Y, Zhou C Y, et al. Emplacement age of the Tahe granite and its constraints on the tectonic nature of the Erguna block in the northern part of the Da Hinggan Range. Chin Sci Bull, 2005, 50(16): 2097–2105
Ge W C, Sui Z M, Wu F Y, et al. Zircon U-Pb ages, Hf isotopic characteristics and their implications of the Early Paleozoic granites in the northeastern Great Xing’an Range, northeastern China. Acta Petrol Sin (in Chinese with English abstract), 2007, 23(2): 423–440
Sui Z M, Ge W C, Wu F Y, et al. Zircon U-Pb ages, Hf isotopic characteristics and their implications of the Early Paleozoic granites in the northeastern Great Xing’an Range, northeastern China. Acta Petrol Sin (in Chinese with English abstract), 2007, 23(2): 461–480
Sun D Y, Wu F Y, Lin Q, et al. Petrogenesis and crust-mantle interaction of early Yanshanian Baishishan pluton in Zhangguangcai Range. Acta Petrol Sin (in Chinese with English abstract), 2001, 17(2): 227–235
Sun D Y, Wu F Y, Gao S, et al. Confirmation of two episodes of A-type granite emplacement during Late Triassic and Early Jurassic in the central Jilin Province, and their constraints on the structural pattern of Eastern Jilin-Heilongjiang area, China. Earth Sci Front (in Chinese with English abstract), 2005, 12(2): 263–275
Zhang Y B, Wu F Y, Wilde S A, et al. Zircon U-Pb ages and tectonic implications of ‘Early Paleozoic’ granitoids at Yanbian, Jilin Province, northeast China. Island Arc, 2004, 13: 484–505
Wu F Y, Yang J H, Wilde S A, et al. Geochronology, petrogenesis and tectonic implications of the Jurassic granites in the Liaodong Peninsula, NE China. Chem Geol, 2005, 221: 127–156
Wu F Y, Yang J H and Zhang Y B. Emplacement ages of the Mesozoic granites in southeastern part of the Western Liaoning Province. Acta Petrol Sin (in Chinese with English abstract), 2006, 22(2): 315–325
Chen B, Tian W, Zhai M G, et al. Zircon U-Pb geochronology and geochemistry of the Mesozoic magmatism in the Taihang Mountains and other places of the North China craton, with implications for petrogenesis and geodynamic setting. Acta Petrol Sin (in Chinese with English abstract), 2005, 21(1): 12–24
Zhou X M, Li W X. Origin of Late Mesozoic igneous rocks in southeastern China: Implications for lithosphere subduction and underplating of mafic magmas. Tectonophysics, 2000, 326: 269–287
Wang Q, Zhao Z H, Jian P, et al. SHRIMP zircon geochronology and Nd-Sr isotopic geochemistry of the Dexing granodiorite porphyries (in Chinese). Acta Petrol Sin, 2004, 20(2): 315–324
Li Z X, Li X H. Formation of the 1300-km-wide intracontinental orogen and postorogenic magmatic province in Mesozoic South China: A flat-slab subduction model. Geology, 2007, 35(2): 179–182
Li J Y, Niu B G, Song B, et al. Crustal Formation and Evolution of northern Changbai Mountains, Northeast China (in Chinese with English abstract). Beijing: Geological Publishing House, 1999. 1–137
Wu F Y, Yang J H, Lo C H. The Jiamusi Massif: a Jurassic accretionary terrane along the western Pacific margin of NE China. Island Arc, 2007, 16: 156–172
Qin K Z, Li H M, Li W S, et al. Intrusion and mineralization ages of the Wunugetushan porphyry Cu-Mo deposit, Inner Mongolia, Northwestern China. Geol Rev (in Chinese with English abstract), 1999, 45(2): 181–185
Huang D H, Du A D, Wu C Y, et al. Metallochronology of molybdenum (-copper) deposits in the North China platform: Re-Os age of molybdenite and its geological significance. Mineral Deposits (in Chinese with English abstract), 1996, 15(4): 289–297
Li Y F, Mao J W, Hu H B, et al. Geology, distribution, types and tectonic settings of Mesozoic molybdenum deposits in East Qinling area. Mineral Deposits (in Chinese with English abstract), 2005, 24(3): 292–304
Mao J W, Xie G Q, Zhang Z H, et al. Mesozoic large-scale metallogenic pulses in North China and corresponding geodynamic settings. Acta Petrol Sin (in Chinese with English abstract), 2005, 21(1): 169–188
Xie G Q, Mao J W, Li R L, et al. Metallogenic epoch and geodynamic framework of Cu-Au-Mo-(W) deposits in Southeastern Hubei Province: Constraints from Re-Os molybdenite ages. Mineral Deposits (in Chinese with English abstract), 2006, 25(1): 43–52
Zhao X F, Li J W, Ma C Q. 40Ar/39Ar geochronology of the Tong-shankou Cu (Mo) deposit in the southeastern Hubei Fe-Cu province: implication for regional metallogeny. Acta Geol Sin (in Chinese with English abstract), 2006, 80(6): 849–862
Wu L S, Zou X Q. Re-Os isotopic age study of the Chengmenshan copper deposit, Jiangxi Province. Mineral Deposits (in Chinese with English abstract), 1997, 16: 376–381
Mao J W, Stein H, Du A D, et al. Molybdenite Re-Os precise dating for Molybdenite from Cu-Au-Mo deposits in the Middle-Lower Reaches of Yangtze River belt and its implications for mineralization. Acta Geol Sin (in Chinese with English abstract), 2004, 78(1): 121–131
Sun W D, Xie Z, Chen J F. Os-Os dating of copper and molybdenum deposits along the middle and lower reaches of the Yangtze River, China. Econ Geol, 2003, 98: 175–180
Mao J W, Zhang Z H, Yu J J, et al. Geodynamic settings of Mesozoic large-scale mineralization in North China and adjacent areas: Implication from the highly precise and accurate ages of metal deposit. Sci China Ser D-Earth Sci, 2003, 46(8): 838–851
Dai J Z, Mao J W, Yang F Q, et al. Geological characteristics and geodynamic background of molybdenum (copper) deposits along Yanshan-Liaoning metallogenic belt on northern margin of North China block. Mineral Deposits (in Chinese with English abstract), 2006, 25(5): 598–612
Wu, F Y, Li, X H, Yang J H, et al. Discussions on the petrogenesis of granites. Acta Petrol Sin (in Chinese with English abstract), 2007, 23(6): 1217–1238
Zhao Z F, Zheng Y F, Wei C S, et al. 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, 2007, 93: 248–272