Zircon Hf Isotope Mapping for Understanding Crustal Architecture and Its Controls on Mineralization during Early Cretaceous in the Southern Great Xing’an Range, NE China

Abstract

Voluminous Early Cretaceous granitoids and associated large-scale ore deposits are distributed within the southern Great Xing’ an Range (SGXR), NE China. Based on previously published geochronology and zircon Hf-isotope data, Hf isotope mapping is undertaken to improve our understanding of crustal architecture and its controls on ore deposits. The ore-related Early Cretaceous granitoids were sourced predominantly from juvenile crust, with the involvement of variable proportions of ancient crustal materials. The crustal architecture, as inferred from Hf isotopic contour maps, indicates two distinct Hf isotopic domains in SGXR, including (1) a higher-ε _Hf (+7 to +11) juvenile crust containing minor ancient crustal material, and (2) a lower-ε _Hf (+2 to +6) juvenile crust containing a greater proportion of ancient crustal materials. The Hf isotopic maps identify links between crustal architecture and regional metallogeny. Copper deposits and other deposits with significant Cu production are restricted mainly to the higher-ε _Hf juvenile crustal regions in the northern and eastern SGXR. Deposits dominated by other metals (e.g., Mo, Sn, W, Pb, Zn, and Ag) occur mainly in the lower- ε _Hf juvenile crustal regions in the southern and western SGXR. Interaction between juvenile crust-derived melts and ancient crustal components played an important role on the distribution of various ore metals.

Keywords

Hf isotope mapping / crustal architecture / large-scale Early Cretaceous granitoids / distribution of ore deposits / southern Great Xing’an Range / zircon

References

[] Chang Z S, Goldfarb R J. An Introduction. Mineral Deposits of China. Mineral Deposits of China, 2019 Littleton, Colorado SEG Special Publication 1-11. 22

[] Chen A X, Zhou D, Zhang Q K, et al. Age, Geochemistry, and Tectonic Implications of Dulaerqiao Granite, Inner Mongolia. Journal of Earth Science, 2018, 29(1): 78-92.

[] Deng C Z, Sun D Y, Li G H, et al. Early Cretaceous Volcanic Rocks in the Great Xing’an Range: Late Effect of a Flat-Slab Subduction. Journal of Geodynamics, 2019, 124(2): 38-51.

[] Deng J, Wang C M, Bagas L, et al. Crustal Architecture and Metallogenesis in the South-Eastern North China Craton. Earth-Science Reviews, 2018, 182: 251-272.

[] Dong X, Niu Y L, Zhang Z M, et al. Mesozoic Crustal Evolution of Southern Tibet: Constraints from the Early Jurassic Igneous Rocks in the Central Lhasa Terrane. Lithos, 2020, 366: 105557. 367

[] Du B, Wang C M, He X Y, et al. Advances in Research of Bulk-Rock Nd and Zircon Hf Isotopic Mappings: Case Study of the Sanjiang Tethyan Orogen. Acta Petrologica Sinica, 2016, 32(8): 2555 2570 (in Chinese with English Abstract)

[] Duan Z P, Jiang S Y, Su H M, et al. Tourmaline as a Recorder of Contrasting Boron Source and Potential Tin Mineralization in the Mopanshan Pluton from Inner Mongolia, Northeastern China. Lithos, 2020, 354: 105284. 355

[] Fan W M, Guo F, Wang Y J, et al. Late Mesozoic Calc-Alkaline Volcanism of Post-Orogenic Extension in the Northern Da Hinggan Mountains, Northeastern China. Journal of Volcanology and Geothermal Research, 2003, 121(1): 115-135. 2

[] Gao X, Zhou Z H, Breiter K, et al. Ore-Formation Mechanism of the Weilasituo Tin-Polymetallic Deposit, NE China: Constraints from Bulk-Rock and Mica Chemistry, He-Ar Isotopes, and Re-Os Dating. Ore Geology Reviews, 2019, 109: 163-183.

[] Gong M Y, Tian W, Fu B, et al. Zircon Hf-O Isotopic Constraints on the Origin of Late Mesozoic Felsic Volcanic Rocks from the Great Xing’an Range, NE China. Lithos, 2018, 308: 412-427. 309

[] Gu A L, Sun J G, Bai L A, et al. Petrogenesis and Metallogenesis of the Early Cretaceous Naoniushan Cu-Dominated Polymetallic Deposit in the Central Great Xing’an Range, NE China. Journal of Asian earth sciences, 2018, 165: 114-131.

[] Guan Q B, Liu Z H, Wang B, et al. Middle Jurassic–Early Cretaceous Tectonic Evolution of the Bayanhushuo Area, Southern Great Xing’ an Range, NE China: Constraints from Zircon U-Pb Geochronological and Geochemical Data of Volcanic and Subvolcanic Rocks. International Geology Review, 2018, 60(15): 1883-1905.

[] Guo F, Fan W M, Gao X F, et al. Sr-Nd-Pb Isotope Mapping of Mesozoic Igneous Rocks in NE China: Constraints on Tectonic Framework and Phanerozoic Crustal Growth. Lithos, 2010, 120(3/4): 563-578.

[] Guo F, Fan W M, Li C W, et al. Early Cretaceous Highly Positive ε_Nd Felsic Volcanic Rocks from the Hinggan Mountains, NE China: Origin and Implications for Phanerozoic Crustal Growth. International Journal of Earth Sciences, 2009, 98(6): 1395-1411.

[] Guo Z J, Zhou Z H, Li G T, et al. SHRIMP U-Pb Zircon Dating and Petrogeochemistral Characteristics of the Intermediate-Acid Intrusive Rocks in the Aoergai Copper Deposit of Inner Mongolia. Geology in China, 2012, 39(6): 1486 1500 (in Chinese with English Abstract)

[] Hao Y, Zhu T Y. Genesis and Prospecting Criteria of Huaaobaote 1118 Highland Cu-Ag Polymetallic Deposit in Inner Mongolia. Inner Mongolia Science Technology & Economy, 2016, 353(7): 80 82 (in Chinese with English Abstract)

[] Hou Z Q, Duan L F, Lu Y J, et al. Lithospheric Architecture of the Lhasa Terrane and Its Control on Ore Deposits in the Himalayan-Tibetan Orogen. Economic Geology, 2015, 110(6): 1541-1575.

[] Huang H, Niu Y L, Mo X X. Syn-Collisional Granitoids in the Qilian Block on the Northern Tibetan Plateau: A Long-Lasting Magmatism since Continental Collision through Slab Steepening. Lithos, 2016, 246: 99-109. 247

[] Huang H, Wang T, Tong Y, et al. Rejuvenation of Ancient MicroContinents during Accretionary Orogenesis: Insights from the Yili Block and Adjacent Regions of the SW Central Asian Orogenic Belt. Earth-Science Reviews, 2020, 208: 103255.

[] Jahn B M. The Central Asian Orogenic Belt and Growth of the Continental Crust in the Phanerozoic. Geological Society, London, Special Publications, 2004, 226(1): 73-100.

[] Ji Z, Ge W C, Wang Q H, et al. Petrogenesis of Early Cretaceous Volcanic Rocks of the Manketouebo Formation in the Wuchagou Region, Central Great Xing’ an Range, NE China, and Tectonic Implications: Geochronological, Geochemical, and Hf Isotopic Evidence. International Geology Review, 2016, 58(5): 556-573.

[] Jiang S Y, Zhao K D, Jiang H, et al. Spatiotemporal Distribution, Geological Characteristics and Metallogenic Mechanism of Tungsten and Tin Deposits in China: An Overview. Chinese Science Bulletin, 2020, 65(33): 3730 3745 (in Chinese with English Abstract)

[] Jiang W C, Li H, Wu J H, et al. A Newly Found Biotite Syenogranite in the Huangshaping Polymetallic Deposit, South China: Insights into Cu Mineralization. Journal of Earth Science, 2018, 29(3): 537-555.

[] Kong J J, Niu Y L, Duan M, et al. Petrogenesis of Luchuba and Wuchaba Granitoids in Western Qinling: Geochronological and Geochemical Evidence. Mineralogy and Petrology, 2017, 111(6): 887-908.

[] Kravchinsky V A, Cogné J P, Harbert W P, et al. Evolution of the Mongol-Okhotsk Ocean as Constrained by New Palaeomagnetic Data from the Mongol-Okhotsk Suture Zone, Siberia. Geophysical Journal International, 2002, 148(1): 34-57.

[] Li S, Chung S L, Wang T, et al. Tectonic Significance and Geodynamic Processes of Large-Scale Early Cretaceous Granitoid Magmatic Events in the Southern Great Xing’ an Range, North China. Tectonics, 2017, 36(4): 615-633.

[] Li S, Wang T, Wilde S A, et al. Evolution, Source and Tectonic Significance of Early Mesozoic Granitoid Magmatism in the Central Asian Orogenic Belt (Central Segment). Earth-Science Reviews, 2013, 126: 206-234.

[] Liu C H, Bagas L, Wang F X. Isotopic Analysis of the SuperLarge Shuangjianzishan Pb-Zn-Ag Deposit in Inner Mongolia, China: Constraints on Magmatism, Metallogenesis, and Tectonic Setting. Ore Geology Reviews, 2016, 75: 252-267.

[] Liu J. Late Paleozoic Magmatism and Its Constraints on Regional Tectonic Evolution in Linxi-Dongwuqi Area, Inner Mongolia, 2009 Changchun Jilin University 1 142 (in Chinese with English Abstract)

[] Liu L J, Zhou T F, Zhang D Y, et al. S Isotopic Geochemistry, Zircon and Cassiterite U-Pb Geochronology of the Haobugao Sn Polymetallic Deposit, Southern Great Xing’ an Range, NE China. Ore Geology Reviews, 2018, 93: 168-180.

[] Liu W, Pan X F, Liu D Y, et al. Three-Step Continental-Crust Growth from Subduction Accretion and Underplating, through Intermediary Differentiation, to Granitoid Production. International Journal of Earth Sciences, 2009, 98(6): 1413-1439.

[] Liu W, Pan X F, Xie L, et al. Sources of Material for the Linxi Granitoids, the Southern Segment of the Da Hinggan Mts.: When and How Continental Crust Grew?. Acta Petrologica Sinica, 2007, 23(2): 441 460 (in Chinese with English Abstract)

[] Liu W, Siebel W, Li X J, et al. Petrogenesis of the Linxi Granitoids, Northern Inner Mongolia of China: Constraints on Basaltic Underplating. Chemical Geology, 2005, 219(1): 5-35. 2/3/4

[] Liu Y F, Jiang S H, Bagas L. The Genesis of Metal Zonation in the Weilasituo and Bairendaba Ag-Zn-Pb-Cu- (Sn-W) Deposits in the Shallow Part of a Porphyry Sn-W-Rb System, Inner Mongolia, China. Ore Geology Reviews, 2016, 75: 150-173.

[] Liu Y F, Jiang S H, Bagas L, et al. Isotopic (C-O-S) Geochemistry and re-Os Geochronology of the Haobugao Zn-Fe Deposit in Inner Mongolia, NE China. Ore Geology Reviews, 2017, 82: 130-147.

[] Luo B J, Zhang H F, Xu W C, et al. The Middle Triassic Meiwu Batholith, West Qinling, Central China: Implications for the Evolution of Compositional Diversity in a Composite Batholith. Journal of Petrology, 2015, 56(6): 1139-1172.

[] Ma X H, Chen B, Yang M C. Magma Mixing Origin for the Aolunhua Porphyry Related to Mo-Cu Mineralization, Eastern Central Asian Orogenic Belt. Gondwana Research, 2013, 24(3/4): 1152-1171.

[] Ma Y, Jiang S Y, Chen R S, et al. Hydrothermal Evolution and Ore Genesis of the Zhaiping Ag-Pb-Zn Deposit in Fujian Province of Southeast China: Evidence from Stable Isotopes (H, O, C, S) and Fluid Inclusions. Ore Geology Reviews, 2019, 104: 246-265.

[] Mao J W, Yuan S D, Xie G Q, et al. New Advances on Metallogenic Studies and Exploration on Critical Minerals of China in 21st Century. Mineral Deposits, 2019, 38(5): 935 969 (in Chinese with English Abstract)

[] Mao J W, Zhou Z H, Wu G, et al. Metallogenic Regularity and Minerogenetic Series of Ore Deposits in Inner Mongolia and Adjacent Areas. Mineral Deposits, 2013, 32(4): 716 730 (in Chinese with English Abstract)

[] Mi K F, Lü Z C, Yan T J, et al. Zircon Geochronological and Geochemical Study of the Baogaigou Tin Deposits, Southern Great Xing’an Range, Northeast China: Implications for the Timing of Mineralization and Ore Genesis. Geological Journal, 2020, 55(7): 5062-5081.

[] Mo X X, Niu Y L, Dong G C, et al. Contribution of Syncollisional Felsic Magmatism to Continental Crust Growth: A Case Study of the Paleogene Linzizong Volcanic Succession in Southern Tibet. Chemical Geology, 2008, 250(1): 49-67. 2/3/4

[] Mole D R, Fiorentini M L, Thebaud N, et al. Archean Komatiite Volcanism Controlled by the Evolution of Early Continents. Proceedings of the National Academy of Sciences of the United States of America, 2014, 111(28): 10083-10088.

[] Mungall J E. Roasting the Mantle: Slab Melting and the Genesis of Major Au and Au-Rich Cu Deposits. Geology, 2002, 30(10): 915-918.

[] Niu Y L, Zhao Z D, Zhu D C, et al. Continental Collision Zones are Primary Sites for Net Continental Crust Growth—A Testable Hypothesis. Earth-Science Reviews, 2013, 127: 96-110.

[] Ouyang H G, Mao J W, Santosh M, et al. The Early Cretaceous Weilasituo Zn-Cu-Ag Vein Deposit in the Southern Great Xing’an Range, Northeast China: Fluid Inclusions, H, O, S, Pb Isotope Geochemistry and Genetic Implications. Ore Geology Reviews, 2014, 56: 503-515.

[] Ouyang H G, Mao J W, Zhou Z H, et al. Late Mesozoic Metallogeny and Intracontinental Magmatism, Southern Great Xing’an Range, Northeastern China. Gondwana Research, 2015, 27(3): 1153-1172.

[] Qiu K F, Yu H C, Wu M Q, et al. Discrete Zr and REE Mineralization of the Baerzhe Rare-Metal Deposit, China. American Mineralogist. Journal of Earth and Planetary Materials, 2019, 104(10): 1487-1502.

[] Schoene B, Schaltegger U, Brack P, et al. Rates of Magma Differentiation and Emplacement in a Ballooning Pluton Recorded by U-Pb TIMS-TEA, Adamello Batholith, Italy. Earth and Planetary Science Letters, 2012, 355: 162-173. 356

[] Şengör A M C, Natal’ln B A, Burtman V S. Evolution of the Altaid Tectonic Collage and Palaeozoic Crustal Growth in Eurasia. Nature, 1993, 364(6435): 299-307.

[] Shen L, Zhao S J, Yu H Y, et al. Geochemical Characteristics and Zircon U-Pb Ages of Porphyroclastic Lava in the Bayaerhushuo Area, the South-Central Segment of Great Xing’ an Range, and Its Geological Significance. Geological Bulletin of China, 2019, 38(8): 1314 1326 (in Chinese with English Abstract)

[] Sheng J F, Fu X Z. The Metallogenic Environment and Geology of Copper Polymetallic Deposits in the Middle Segment of Great Xing’ an Range, 1999 Beijing Geological Publishing House 1 214 (in Chinese with English Abstract)

[] Shi G H, Liu D Y, Zhang F Q, et al. SHRIMP U-Pb Zircon Geochronology and Its Implications on the Xilin Gol Complex, Inner Mongolia, China. Chinese Science Bulletin, 2003, 48(24): 2742-2748.

[] Shu Q H, Chang Z S, Lai Y, et al. Regional Metallogeny of Mo-Bearing Deposits in Northeastern China, with New Re-Os Dates of Porphyry Mo Deposits in the Northern Xilamulun District. Economic Geology, 2016, 111(7): 1783-1798.

[] Shu Q H, Lai Y, Sun Y, et al. Ore Genesis and Hydrothermal Evolution of the Baiyinnuo’er Zinc-Lead Skarn Deposit, Northeast China: Evidence from Isotopes (S, Pb) and Fluid Inclusions. Economic Geology, 2013, 108(4): 835-860.

[] Shu Q H, Lai Y, Wang C, et al. Geochronology, Geochemistry and Sr-Nd-Hf Isotopes of the Haisugou Porphyry Mo Deposit, Northeast China, and Their Geological Significance. Journal of Asian Earth Sciences, 2014, 79: 777-791.

[] Su H M, Jiang S Y. A Comparison Study of Tungsten-Bearing Granite and Related Mineralization in the Northern Jiangxi-Southern Anhui Provinces and Southern Jiangxi Province in South China. Science China Earth Sciences, 2017, 60(11): 1942-1958.

[] Wan L, Lu C D, Zeng Z X, et al. Nature and Significance of the Late Mesozoic Granitoids in the Southern Great Xing’ an Range, Eastern Central Asian Orogenic Belt. International Geology Review, 2019, 61(5): 584-606.

[] Wang C M, Bagas L, Deng J, et al. Crustal Architecture and Its Controls on Mineralisation in the North China Craton. Ore Geology Reviews, 2018, 98: 109-125.

[] Wang C M, Bagas L, Lu Y J, et al. Terrane Boundary and SpatioTemporal Distribution of Ore Deposits in the Sanjiang Tethyan Orogen: Insights from Zircon Hf-Isotopic Mapping. Earth-Science Reviews, 2016, 156: 39-65.

[] Wang C M, Deng J, Bagas L, et al. Zircon Hf-Isotopic Mapping for Understanding Crustal Architecture and Metallogenesis in the Eastern Qinling Orogen. Gondwana Research, 2017, 50: 293-310.

[] Wang J B, Wang Y W, Wang L J, et al. Tin-Polymetallic Mineralization in the Southern Part of the Da Hinggan Mountains, China. Resource Geology, 2001, 51(4): 283-291.

[] Wang T, Guo L, Zhang L, et al. Timing and Evolution of Jurassic-Cretaceous Granitoid Magmatisms in the Mongol-Okhotsk Belt and Adjacent Areas, NE Asia: Implications for Transition from Contractional Crustal Thickening to Extensional Thinning and Geodynamic Settings. Journal of Asian Earth Sciences, 2015, 97: 365-392.

[] Wang X D, Xu D M, Lv X B, et al. Origin of the Haobugao Skarn Fe-Zn Polymetallic Deposit, Southern Great Xing’ an Range, NE China: Geochronological, Geochemical, and Sr-Nd-Pb Isotopic Constraints. Ore Geology Reviews, 2018, 94: 58-72.

[] Wang X, Ren Y S, Zhao D S, et al. Ore-Forming Fluids and Ore Genesis of the Large Bayanbaolege Ag Polymetallic Deposit, Southern Great Xing’ an Range, NE China. Ore Geology Reviews, 2019, 111: 102987.

[] Wei W, Zou T, Huang X K, et al. Petrogenesis of Early Cretaceous Granitoids in the Southern Great Xing’ an Range, NE China: Constraints from the Haliheiba Pluton. Geochemistry, 2020, 80(2): 125608.

[] Wu F Y, Jahn B M, Wilde S A, et al. Phanerozoic Crustal Growth: U-Pb and Sr-Nd Isotopic Evidence from the Granites in Northeastern China. Tectonophysics, 2000, 328(1): 89-113. 2

[] Wu F Y, Jahn B M, Wilde S A, et al. Highly Fractionated I-Type Granites in NE China (II): Isotopic Geochemistry and Implications for Crustal Growth in the Phanerozoic. Lithos, 2003, 67(3/4): 191-204.

[] Wu F Y, Lin J Q, Wilde S A, et al. Nature and Significance of the Early Cretaceous Giant Igneous Event in Eastern China. Earth and Planetary Science Letters, 2005, 233(1): 103-119. 2

[] Wu F Y, Sun D Y, Ge W C, et al. Geochronology of the Phanerozoic Granitoids in Northeastern China. Journal of Asian Earth Sciences, 2011, 41(1): 1-30.

[] Xiao W J, Windley B F, Hao J, et al. Accretion Leading to Collision and the Permian Solonker Suture, Inner Mongolia, China: Termination of the Central Asian Orogenic Belt. Tectonics, 2003, 22(6): 1069.

[] Xu B, Jiang S Y, Luo L, et al. Origin of the Granites and Related Sn and Pb-Zn Polymetallic Ore Deposits in the Pengshan District, Jiangxi Province, South China: Constraints from Geochronology, Geochemistry, Mineral Chemistry, and Sr-Nd-Hf-Pb-S Isotopes. Mineralium Deposita, 2017, 52(3): 337-360.

[] Xu J L, Zheng C Q, Tajčmanová L, et al. Phase Equilibria Modeling and Zircon Dating for Precambrian Metapelites from the Xinghuadukou Complex in the Lulin Forest of the Erguna Massif, Northeast China. Journal of Earth Science, 2018, 29(5): 1276-1290.

[] Yang W B, Niu H C, Cheng L R, et al. Geochronology, Geochemistry and Geodynamic Implications of the Late Mesozoic Volcanic Rocks in the Southern Great Xing’ an Mountains, NE China. Journal of Asian Earth Sciences, 2015, 113: 454-470.

[] Ying J F, Zhou X H, Zhang L C, et al. Geochronological Framework of Mesozoic Volcanic Rocks in the Great Xing’ an Range, NE China, and Their Geodynamic Implications. Journal of Asian Earth Sciences, 2010, 39(6): 786-793.

[] Yuan S D, Williams-Jones A E, Romer R L, et al. Protolith-Related Thermal Controls on the Decoupling of Sn and W in Sn-W Metallogenic Provinces: Insights from the Nanling Region, China. Economic Geology, 2019, 114(5): 1005-1012.

[] Zhai D G, Liu J J, Zhang H Y, et al. S-Pb Isotopic Geochemistry, U-Pb and re-Os Geochronology of the Huanggangliang Fe-Sn Deposit, Inner Mongolia, NE China. Ore Geology Reviews, 2014, 59: 109-122.

[] Zhai D G, Williams-Jones E, Selby D, et al. The Genesis of the Giant Shuangjianzishan Epithermal Ag-Pb-Zn Deposit, Inner Mongolia, Northeastern China. Economic Geology, 2019, 115(1): 101-128.

[] Zhang C, Quan J Y, Liu Z H, et al. Geochemical Characteristics and Geological Significance of Meta-Volcanic Rocks of the Bainaimiao Group, Sonid Right Banner, Inner Mongolia, China. Journal of Earth Science, 2019, 30(2): 272-285.

[] Zhang C, Quan J Y, Zhang Y J, et al. Late Mesozoic Tectonic Evolution of the Southern Great Xing’an Range, NE China: Evidence from Whole-Rock Geochemistry, and Zircon UPb Ages and Hf Isotopes from Volcanic Rocks. Lithos, 2020, 362: 105409. 363

[] Zhang J H, Gao S, Ge W C, et al. Geochronology of the Mesozoic Volcanic Rocks in the Great Xing’an Range, Northeastern China: Implications for Subduction-Induced Delamination. Chemical Geology, 2010, 276(3/4): 144-165.

[] Zhang L C, Zhou X H, Ying J F, et al. Geochemistry and Sr-Nd-Pb-Hf Isotopes of Early Cretaceous Basalts from the Great Xinggan Range, NE China: Implications for Their Origin and Mantle Source Characteristics. Chemical Geology, 2008, 256(1): 12-23. 2

[] Zhang W, Lentz D R, Thorne K G, et al. Late Silurian-Early Devonian Slab Break-off beneath the Canadian Appalachians: Insights from the Nashwaak Granite, West-Central New Brunswick, Canada. Lithos, 2020, 358: 105393. 359

[] Zhang Y, Niu Y L, Hu Y, et al. The Syncollisional Granitoid Magmatism and Continental Crust Growth in the West Kunlun Orogen, China—Evidence from Geochronology and Geochemistry of the Arkarz Pluton. Lithos, 2016, 245: 191-204.

[] Zhang Z C, Wang Y W, Li D D, et al. Lithospheric Architecture and Metallogenesis in Liaodong Peninsula, North China Craton: Insights from Zircon Hf-Nd Isotope Mapping. Minerals, 2019, 9(3): 179.

[] Zhao X C, Zhou W X, Fu D, et al. Isotope Chronology and Geochemistry of the Lower Carboniferous Granite in Xilinhot, Inner Mongolia, China. Journal of Earth Science, 2018, 29(2): 280-294.

[] Zhou J B, Wilde S A. The Crustal Accretion History and Tectonic Evolution of the NE China Segment of the Central Asian Orogenic Belt. Gondwana Research, 2013, 23(4): 1365-1377.

[] Zhou Y T, Lai Y, Shu Q H, et al. Geochronology and Fluid Inclusion Study of the Shabutai Porphyry Mo Deposit, Inner Mongolia. Ore Geology Reviews, 2017, 81: 745-759.