Cu-S Isotope characteristics and metallogenic prediction of orebodies in the Dajing Sn-Cu polymetallic deposit in Inner Mongolia

doi:10.13745/j.esf.sf.2021.11.5

Abstract

Abstract:

The Dajing Sn-Cu polymetallic deposit in Inner Mongolia represents typical ore deposits in the Daxinganling metallogenic belt. The mining area is located in Linxi County, eastern Inner Mongolia, with geological conditions favorable for ore formation. Here, we studied Cu isotopes in chalcopyrite and S and Pb isotopes in chalcopyrite and pyrite orebodies. The measured δ⁶⁵Cu value for chalcopyrite ranged from -0.46‰ to +0.32‰ overall, averaging at 0‰ with an average 2σ error of 0.03‰; the δ³⁴S values for chalcopyrite and pyrite ranged from +0.076‰ to +3.00‰ overall, averaging at +1.83‰, with relatively high uniformity, showing magma associated S isotopic characteristics. The ranges of Pb isotopic ratios were small overall; specifically, ²⁰⁶Pb/²⁰⁴Pb ranged between 18.291-18.353, ²⁰⁷Pb/²⁰⁴Pb between 15.501-15.574, and ²⁰⁸Pb/²⁰⁴Pb between 38.051-38.265. Together with previous studies in the region we show that, in the Dejing deposit, Cu isotopic changes occur during the sulfide-magma differentiation process. The δ⁶⁵Cu variation pattern in chalcopyrite may indicate the direction of evolution of ore-forming sulfides in the mineralization stage. For instance, the direction of gradual δ⁶⁵Cu value decreasing may point to concealed orebody. In the study area of the Dejing deposit, the mining district in the east shares similar Cu isotopic characteristics with the non-production target area of its periphery, where, according to Cu isotope evidence, may exist deep concealed orebodies.

Key words: Dajing deposit, Cu-Sn polymetallic deposit, Cu isotope, S isotope, concealed orebody

CLC Number:

WANG Yue, SU Shangguo, ZHANG Qi, ZHOU Qiming, ZHANG Yanan. Cu-S Isotope characteristics and metallogenic prediction of orebodies in the Dajing Sn-Cu polymetallic deposit in Inner Mongolia[J]. Earth Science Frontiers, 2022, 29(3): 319-328.

Figures/Tables 5

References 60

[1]	FERNANDEZ A, BORROK D M. Fractionation of Cu, Fe, and Zn isotopes during the oxidative weathering of sulfide-rich rocks[J]. Chemical Geology, 2009, 264: 1-12. DOI URL
[2]	ZHU X K, GUO Y, WILLIAMS R J P, et al. Mass fractionation processes of transition metal isotopes[J]. Earth and Planetary Science Letters, 2002, 200: 47-62. DOI URL
[3]	LIU S A, TENG F Z, LI S G, et al. Copper and iron isotope fractionation during weathering and pedogenesis: insights from saprolite profiles[J]. Geochimica et Cosmochimica Acta, 2014, 146: 59-75. DOI URL
[4]	MATHUR R, JIN L, PRUSH V, et al. Cu isotopes and concentrations during weathering of black shale of the Marcellus formation, Huntingdon County, Pennsylvania (USA)[J]. Chemical Geology, 2012, 304/305: 175-184. DOI URL
[5]	ASAEL D, MATTHEWS A, BAR-MATTHEWS M, et al. Copper isotope fractionation in sedimentary copper mineralization (Timna Valley, Israel)[J]. Chemical Geology, 2007, 243: 238-254. DOI URL
[6]	GRAHAM S, PEARSON N, JACKSON S, et al. Tracing Cu and Fe from source to porphyry: in situ determination of Cu and Fe isotope ratios in sulfides from the Grasberg Cu-Au deposit[J]. Chemical Geology, 2004, 207: 147-169. DOI URL
[7]	LARSON P B, MAHER K, RAMOS F C, et al. Copper isotope ratios in magmatic and hydrothermal ore forming environments[J]. Chemical Geology, 2003, 201(3/4): 337-350. DOI URL
[8]	LI W Q, JACKSON S E, PEARSON N J, et al. Copper isotopic zonation in the Northparkes porphyry Cu-Au deposit, SE Australia[J]. Geochimica et Cosmochimica Acta, 2010, 74: 4078-4096. DOI URL
[9]	MAHER K C, LARSON P B. Variation in copper isotope ratios and controls on fractionation in hypogene skarn mineralization at Coroccohuayco and Tintaya, Peru[J]. Economic Geology, 2007, 102: 225-237. DOI URL
[10]	MATHUR R, TITLEY S, BARRA F, et al. Exploration potential of Cu isotope fractionation in porphyry copper deposits[J]. Journal of Geochemical Exploration, 2009, 102: 1-6. DOI URL
[11]	ROUXEL O, FOUQUET Y, LUDDEN J N. Copper isotope systematics of the Lucky Strike, Rainbow, and Logatchev seafloor hydrothermal fields on the Mid-Atlantic Ridge[J]. Economic Geology, 2004, 99: 585-600. DOI URL
[12]	LUO X Z, REHKAMKPEI M R, LEE D C. High precision²³⁰Th/²³²Th and ²³⁴U/²³⁸U measurements using energy filtered ICP magnetic sector multiple collector mass spectrometry[J]. International Journal of Mass Spectrometry and Ion Processes, 1997, 171(1/3): 105-117. DOI URL
[13]	HALLIDAY A N, LEE D C, CHRISTENSEN J N, et al. Applications of multiple collector ICP-MS to cosmochemistry, geochemistry and paleoceanography[J]. Geochimica et Cosmochimica Acta, 1998, 62(6): 919-940. DOI URL
[14]	MARECHAL C N, TELOUK P, ALBAREDE F. Precise analysis of copper and zinc isotopic compositions by plasma-source mass spectrometry[J]. Chemical Geology, 1999, 156: 251-273. DOI URL
[15]	BRAXTON D, MATHUR R D. Exploration applications of copper isotopes in the supergene environment: a case study of the bayugo porphyry copper-gold deposit, Southern Philippines[J]. Economic Geology, 2011, 106 (8): 1447-1463. DOI URL
[16]	GRAHAM S, PEARSON N, JACKSON S. et al. Tracing Cu and Fe from source to porphyry: in situ determination of Cu and Fe isotope ratios in sulfides from the Grasberg Cu-Au deposit[J]. Chemical Geology, 2004, 207(3/4): 147-169. DOI URL
[17]	芮宗瑶, 施林道, 方如恒. 华北陆块北缘及邻区有色金属矿床地质[M]. 北京: 地质出版社, 1994.
[18]	刘建明, 张锐, 张庆洲. 大兴安岭地区的区域成矿特征[J]. 地学前缘, 2004, 11(1): 269-277.
[19]	OUYANG H G, WU X L, MAO J W. The nature and timing of ore formation in the Budunhua copper deposit, southern Great Xing’an Range: evidence from geology, fluid inclusions, and U-Pb and Re-Os geochronology[J]. Ore Geology Reviews, 2014, 63: 238-251. DOI URL
[20]	ZENG Q D, LIU J M, YU C M, et al. Metal deposits in the Da Hinggan Mountains, NE China: styles, characteristics, and exploration potential[J]. International Geology Review, 2011, 53(7): 846-878. DOI URL
[21]	OUYANGA H G, MAO J W, ZHOU Z H, et al. Late Mesozoic metallogeny and intracontinental magmatism, southern Great Xing’an Range, northeastern China[J]. Gondwana Research, 2015, 27(3): 1153-1172. DOI URL
[22]	赵一鸣, 王大畏, 张德全, 等. 内蒙古东南部铜多金属成矿地质条件及找矿模式[M]. 北京: 地震出版社, 1994.
[23]	赵一鸣. 大兴安岭及其邻区铜多金属矿床成矿规律与远景评价[M]. 北京: 地震出版社, 1997.
[24]	王莉娟, 王玉往, 王京彬, 等. 大井矿床锡铜矿体成矿流体研究及其成因意义[J]. 岩石学报, 2000, 16(4): 609-614.
[25]	储雪蕾, 霍卫国, 张巽. 内蒙古林西县大井铜多金属矿床的硫、碳和铅同位素及成矿物质来源[J]. 岩石学报, 2002, 18(4): 566-574.
[26]	张德全. 大井银铜锡矿体:一个潜火山热液矿床的特征和成因[J]. 火山地质与矿产, 1993, 14(1): 37-46.
[27]	储雪蕾, 孙敏, 周美夫. 内蒙古林西大井铜多金属矿床矿石的铂族元素分布及其物质来源[J]. 科学通报, 2002, 47(6): 457-461.
[28]	冯建忠, 艾霞, 吴俞斌, 等. 内蒙大井多金属矿床稳定同位素地球化学特征[J]. 吉林地质, 1994, 13(3): 60-66.
[29]	廖震, 王玉往, 王京彬, 等. 内蒙古大井锡多金属矿床岩脉 LAICP-MS 锆石 U-Pb 定年及其地质意义[J]. 岩石学报, 2012, 28(7): 2292-2306.
[30]	王汉生, 李欲晓. 岩组分析在大井构造研究中的应用[J]. 地质找矿论丛, 1995, 10(1): 16-24.
[31]	江思宏, 梁清玲, 刘翼飞, 等. 内蒙古大井矿区及外围岩浆岩锆石U-Pb 年龄及其对成矿时的约束[J]. 岩石学报, 2012, 28(2): 495-513.
[32]	王玉往, 王京彬, 龙灵利, 等. 内蒙古大井矿床成矿作用[M]. 北京: 科学出版社, 2014.
[33]	MARÉCHAL C N, TÉLOUK, P, ALBARÈDE F. Precise analysis of copper and zinc isotopic compositions by plasma-source mass spectrometry[J]. Chemical Geology, 1999, 156: 251-273. DOI URL
[34]	MATHUR R, RUIZ J, TITLEY S, et al. Cu isotopic fractionation in the supergene environment with and without bacteria[J]. Geochimica et Cosmochimica Acta, 2005, 69(22): 5233-5246. DOI URL
[35]	MALITCH K N, LATYPOV R M, BADANINA I Y, et al. Insights into ore genesis of Ni-Cu-PGE sulfide deposits of the Noril’sk Province (Russia): evidence from copper and sulfur isotopes[J]. Lithos, 2014, 204: 172-187. DOI URL
[36]	KROUSE H R, FOLINSBEE R E. The S³²/S³⁴ ratio in troilite from the Bruderheim and Peace River meteorites[J]. Journal of Geophysical Research, 1964, 10(69): 4192-4193.
[37]	WALKER R J, MORGAN J W, HORAN M F, et al. Re-Os isotopic evidence for an enriched-mantle source for the Noril’sk-type, ore-bearing intrusions, Siberia[J]. Geochimica et Cosmochimica Acta, 1994, 58: 4179-4197. DOI URL
[38]	WOODEN J L, CZAMANSKE G K, FEDORENKO V A, et al. Isotopic and trace-element constraints on mantle and crustal contributions to Siberian continental flood basalts, Noril’sk area, Siberia[J]. Geochimica et Cosmochimica Acta, 1993, 57: 3677-3704. DOI URL
[39]	RIPLEY E M, BROPHY J G, LI C. Copper solubility in a basaltic melt and sulfide liquid/silicate melt partition coefficients of Cu and Fe[J]. Geochimica et Cosmochimica Acta, 2002, 66: 2791-2800. DOI URL
[40]	RIPLEY E M, DONG S F, LI C S, et al. Cu isotope variations between conduit and sheet-style Ni-Cu-PGE sulfide mineralization in the Midcontinent Rift System, North America[J]. Chemical Geology, 2005, 414: 59-68. DOI URL
[41]	RICHTER F M, DAUPHAS N, TENG F Z. Non-traditional fractionation of non-traditional isotopes: evaporation, chemical diffusion and Soret diffusion[J]. Chemical Geology, 2009, 258: 92-103. DOI URL
[42]	HUANG F, LUNDSTROM C C, GLESSNER J.et al. Chemical and isotopic fractionation of wet andesite in a temperature gradient: experiments and models suggesting a new mechanism of magma differentiation[J]. Geochimica et Cosmochimica Acta, 2009, 73(3): 729-749. DOI URL
[43]	LUNDSTROM C E, BOUDREAU A, PERTERMANN M. Diffusion-reaction in a thermal gradient: implications for the genesis of anorthitic plagioclase, high alumina basalt and igneous mineral layering[J]. Earth and Planetary Science Letters, 2005, 237(3/4): 829-854. DOI URL
[44]	HSU Y J, ZAJACZ Z, ULMERA P, et al. Copper partitioning between silicate melts and amphibole: Experimental insight into magma evolution leading to porphyry copper ore formation[J]. Chemical Geology, 448(5): 151-163. DOI URL
[45]	LEE C T A, LUFFI P, CHIN E J, et al. Copper systematics in arc magmas and implications for crust-mantle differentiation[J]. Science, 2012, 33: 64-68. DOI URL
[46]	LIU S A, HUANG J, LIU J G, et al. Copper isotopic composition of the silicate Earth[J]. Earth and Planetary Science Letters, 2015, 427: 95-103. DOI URL
[47]	TANG M, LEE C T, JI W Q, et al. Crustal thickening and endogenic oxidation of magmatic sulfur[J]. Science Advances, 2020, 6(31): 63-42.
[48]	NALDRETT A J, SINGH J, KRSTIC S. The mineralogy of the Voisey’s Bay Ni-Cu-Co deposit, northern Labrador, Canada: influence of oxidation state on textures and mineral compositions[J]. Economic Geology, 2000, 95: 889-900.
[49]	DARE S A S, BARNES S J, BEAUDOIN G. Variation in trace element content of magnetite crystallized from a fractionating sulfide liquid, Sudbury, Canada: implications for provenance discrimination[J]. Geochimica et Cosmochimica Acta, 2012, 88: 27-50. DOI URL
[50]	GAO J F, ZHOU M F. LIGHTFOOT P C, et al. Sulfide saturation and magma emplacement in the formation of the Permian Huangshandong Ni-Cu sulfide deposit, Xinjiang, NW China[J]. Economic Geology, 2013, 108: 1833-1848. DOI URL
[51]	ZHAO Y, XUE C J, ZHAO X B, et al. Variable mineralization processes during the formation of the Permian Hulu Ni-Cu sulfide deposit, Xinjiang, Northwestern China[J]. Journal of Asian Earth Sciences, 2016, 126: 1-13. DOI URL
[52]	RIPLEY E D, BROPHY J G. Solubility of copper in a sulfur-free mafic melt[J]. Geochimica et Cosmochimica Acta, 1995, 59: 5027-5030. DOI URL
[53]	MIKHLIN Y, TOMASHEVICH Y, TAUSON V, et al. A comparative X-ray absorption near-edge structure study of bornite, Cu₅FeS₄, and chalcopyrite, CuFeS₂[J]. Journal of Electron Spectroscopy and Related Phenomena, 2005, 142: 83-88. DOI URL
[54]	TODD E C, SHERMAN D M. Surface oxidation of chalcocite (Cu₂S) under aqueous (pH=2-11) and ambient atmospheric conditions: mineralogy from Cu L- and O K-edge X-ray absorption spectroscopy[J]. American Mineralogist, 2003, 88: 1652-1656. DOI URL
[55]	KLEKOVKINA V V, GAINOV R R, VAGIZOV F G, et al. Oxidation and magnetic states of chalcopyrite CuFeS₂: a first principles calculation[J]. Optics and Spectroscopy, 2014, 116: 885-888. DOI URL
[56]	BORROK D M, NIMICK D A, WANTY R B, et al. Isotopic variations of dissolved copper and zinc in stream waters affected by historical mining[J]. Geochimica et Cosmochimica Acta, 2008, 72: 329-344. DOI URL
[57]	EHRLICH S, BUTLER I, HALICZ L, et al. Experimental study of the copper isotope fractionation between aqueous Cu(II) and covellite, CuS[J]. Chemical Geology, 2004, 209: 259-269. DOI URL
[58]	MATHUR R, JIN L, PRUSH V, et al. Cu isotopes and concentrations during weathering of black shale of the Marcellus formation, Huntingdon County, Pennsylvania (USA)[J]. Chemical Geology, 2012, (304/305): 175-184.
[59]	MATHUR R, MUNK L, NGUYEN M, et al. Modern and paleofluid pathways revealed by Cu isotope compositions in surface waters and ores of the pebble porphyry Cu-Au-Mo deposit, Alaska[J]. Economic Geology, 2013, 108: 529-541. DOI URL
[60]	WALL A J, MATHUR R, POST J E, et al. Cu isotope fractionation during bornite dissolution: an in situ X-ray diffraction analysis[J]. Ore Geology Reviews, 2011, 42: 62-70. DOI URL

样品编号	矿物	采样位置	δ⁶⁵Cu/‰	2σ/‰	δ³⁴S/‰	²⁰⁶Pb/²⁰⁴Pb	²⁰⁷Pb/²⁰⁴Pb	²⁰⁸Pb/²⁰⁴Pb
10#01-1	黄铁矿	矿体			2.638	18.351	15.574	38.094
10#01-2	黄铜矿	矿体	-0.446	0.034	1.975	18.346	15.561	38.191
10#02-1	黄铁矿	矿体			2.638
10#02-2	黄铜矿	矿体	0.178	0.056	2.966	18.301	15.509	38.105
10#03-1	黄铁矿	矿体				18.341	15.512	38.256
10#03-2	黄铜矿	矿体	0.326	0.024	0.806	18.291	15.492	38.046
10#04-1	黄铁矿	矿体			3.842
10#04-2	黄铜矿	矿体	0.127	0.008	2.860	18.318	15.501	38.136
10#05-1	黄铁矿	矿体			1.236
10#05-2	黄铜矿	矿体	0.028	0.044	2.942	18.373	15.534	38.156
10#06-1	黄铁矿	矿体			1.049	18.279	15.508	38.051
10#06-2	黄铜矿	矿体	0.163	0.054	0.441	18.345	15.527	38.104
10#07-1	黄铁矿	矿体			2.240	18.336	15.534	38.154
10#07-2	黄铜矿	矿体	-0.458	0.030		18.315	15.546	38.174
10#08-1	黄铁矿	矿体
10#08-2	黄铜矿	矿体	-0.289	0.023	0.563	18.318	15.508	38.164
10#09-1	黄铁矿	矿体			1.150
10#09-2	黄铜矿	矿体	0.177	0.033	1.070	18.294	15.561	38.167
10#10-1	黄铁矿	矿体			2.553
10#10-2	黄铜矿	矿体	0.139	0.037	0.076	18.353	15.515	38.195

样品编号	矿物	采样位置	δ⁶⁵Cu/‰	2σ/‰	δ³⁴S/‰	²⁰⁶Pb/²⁰⁴Pb	²⁰⁷Pb/²⁰⁴Pb	²⁰⁸Pb/²⁰⁴Pb
10#01-1	黄铁矿	矿体			2.638	18.351	15.574	38.094
10#01-2	黄铜矿	矿体	-0.446	0.034	1.975	18.346	15.561	38.191
10#02-1	黄铁矿	矿体			2.638
10#02-2	黄铜矿	矿体	0.178	0.056	2.966	18.301	15.509	38.105
10#03-1	黄铁矿	矿体				18.341	15.512	38.256
10#03-2	黄铜矿	矿体	0.326	0.024	0.806	18.291	15.492	38.046
10#04-1	黄铁矿	矿体			3.842
10#04-2	黄铜矿	矿体	0.127	0.008	2.860	18.318	15.501	38.136
10#05-1	黄铁矿	矿体			1.236
10#05-2	黄铜矿	矿体	0.028	0.044	2.942	18.373	15.534	38.156
10#06-1	黄铁矿	矿体			1.049	18.279	15.508	38.051
10#06-2	黄铜矿	矿体	0.163	0.054	0.441	18.345	15.527	38.104
10#07-1	黄铁矿	矿体			2.240	18.336	15.534	38.154
10#07-2	黄铜矿	矿体	-0.458	0.030		18.315	15.546	38.174
10#08-1	黄铁矿	矿体
10#08-2	黄铜矿	矿体	-0.289	0.023	0.563	18.318	15.508	38.164
10#09-1	黄铁矿	矿体			1.150
10#09-2	黄铜矿	矿体	0.177	0.033	1.070	18.294	15.561	38.167
10#10-1	黄铁矿	矿体			2.553
10#10-2	黄铜矿	矿体	0.139	0.037	0.076	18.353	15.515	38.195