Study of oxygen fugacity during magma evolution and ore genesis in the Hongge mafic–ultramafic intrusion, the Panxi region, SW China

详细信息    查看全文

• 作者：Mingyang Liao ; Yan Tao ; Xieyan Song ; Yubang Li ; Feng Xiong
• 关键词：Oxygen fugacity ; Fe–Ti oxide deposit ; Basalts ; Emeishan large igneous province ; Hongge layered intrusion
• 刊名：Chinese Journal of Geochemistry
• 出版年：2016
• 出版时间：March 2016
• 年：2016
• 卷：35
• 期：1
• 页码：25-42
• 全文大小：10,580 KB
• 参考文献：Andersen DJ, Lindsley DH (1985) New (and final!) models for the Ti-magnetite/ilmenite geothermometer and oxygen barometer. Abstract AGU 1985 Spring Meeting Eos Transactions. American Geophysical Union, pp 66–416
  Bai ZJ, Zhong H, Naldrett AJ, Zhu WG, Xu GW et al (2012a) Whole rock and mineral composition constraints on the genesis of the giant Hongge Fe–Ti–V oxide deposit in the Emeishan large igneous province, SW China. Econ Geol 107:507–524CrossRef
  Bai ZJ, Zhong H, Li C, Xu WG, Guiwen Xu (2012b) Platinum-group elements in the oxide layers of the Hongge mafic-ultramafic intrusion, Emeishan large igneous province, SW China. Ore Geol Rev 46:149–161CrossRef
  Bai ZJ, Zhong H, Li C, Zhu WG, He DF, Liang Qi (2014) Contrasting parental magma compositions for the Hongge and Panzhihua magmatic Fe–Ti–V oxide deposits, Emeishan large igneous province, SW China. Econ Geol 109:1763–1785CrossRef
  Ballhaus C (1993) Redox states of lithospheric and asthenospheric upper mantle. Contrib Miner Petrol 114:331–348CrossRef
  Bédard JH (2010) Parameterization of the Fe-Mg exchange coefficient (Kd) between clinopyroxene and silicate melt. Chem Geol 274:169–176CrossRef
  Bohlen SR, Essene EJ (1977) Feldspar and oxide thermometry of granulites in the Adirondack Highlands. Contrib Miner Petrol 62:153–169CrossRef
  Botcharnikov RE, Koepke J, Holtz F, McCammon C, Wilke M (2005) The effect of water activity on the oxidation and structural state of Fe in a ferro-basaltic melt. Geochim Cosmochim Acta 69:5071–5085CrossRef
  Botcharnikov RE, Almeev RR, Koepke J, Holtz F (2008) Phase relations and liquid lines of descent in hydrous ferrobasalt—implications for the Skaergaard intrusion and Columbia River Basalts. J Petrol 49:1687–1727CrossRef
  Bowles JFW (1977) A method of tracing the temperature and oxygen-fugacity histories of complex magnetite-ilmenite grains. Mineral Mag 41:103–109CrossRef
  Buddington AF, Lindsley DH (1964) Iron–titanium oxide minerals and synthetic equivalents. J Petrol 5:310–357CrossRef
  Cawthorn RG (1996) Layered Intrusions. Elsevier, Amsterdam, p 531
  Charlier B, Duchesne JC, Auwera JV (2006) Magma chamber processes in the Tellnes ilmenite deposit (Rogaland Anorthosite Province, SW Norway) and the formation of Fe–Ti ores in massif-type anorthosite. Chem Geol 234:264–290CrossRef
  Charlier B, Namur O, Duchesne JC, Wiszniewska J, Parecki A, Auwera JV (2009) Cumulate origin and polybaric crystallization of Fe–Ti oxide ores in the Suwalki anorthosite, Northeastern Poland. Econ Geol 104:205–221CrossRef
  Chung SL, Jahn BM (1995) Plume–lithosphere interaction in generation of the Emeishan flood basalts at the Permian-Triassic boundary. Geology 23:889–892CrossRef
  Force CE (1991) Geology of titanium mineral deposits. Geol Soc Am Spec Pap. 259:1–112
  France L, Ildefonse B, Koepke J, Bech F (2010) A new method to estimate the oxidation state of basaltic series from microprobe analyses. J Volcanol Geoth Res 189:340–346CrossRef
  Frost BR, Lindsley DH, Andersen DJ (1988) Fe–Ti oxide-silicate equilibrium: assemblages with fayalitic olivine. Am Mineral 73:727–740
  Ganino C, Arndt NT, Meifu Zhou, Gaillar F, Chauvel C (2008) Interaction of magma with sedimentary wall rock and magnetite ore genesis in the Panzhihua mafic intrusion, SW China. Miner Deposita 43:677–694CrossRef
  Ghiorso MS, Evans BW (2008) Thermodynamics of rhombohedral oxide solid solutions and a revision of the Fe–Ti two-oxide geothermometer and oxygenbarometer. Am J Sci 308–9:957–1039CrossRef
  Ghiorso MS, Sack RO (1991) Fe–Ti oxide geothermometry: thermodynamic formulation and the estimation of intensive variables in silicic magmas. Contrib Miner Petrol 108:485–510CrossRef
  Ghiorso MS, Sack RO (1995) Chemical mass transfer in magmatic processes IV. A revised and internally consistent thermodynamic model for the interpolation and extrapolation of liquid–solid equilibria in magmatic systems at elevated temperature and pressures. Contrib Mineral Petrol 119:197–212CrossRef
  Guo F, Fan W, Wang Y (2004) When did the Emeishan mantle plume activity start? Geochronological and geochemical evidence from ultramafic–mafic dikes in southwestern China. Int Geol Rev 46:226–234CrossRef
  Hauri EH, Wagner TP, Grove TL (1994) Experimental and natural partitioning of Th, U, Pb and other trace elements between garnet, clinopyroxene and basaltic melts. Chem Geol 117:149–166CrossRef
  Herd CDK (2008) Basalts as probes of planetary interior redox state. Rev Miner Geochem 68:527–553CrossRef
  Howarth GH, Prevec SA (2013) Hydration vs. oxidation: modelling implications for Fe-Ti oxide crystallisation in mafic intrusions, with specific reference to the Panzhihua intrusion, SW China. Geosci Front 4:555–569CrossRef
  Kamenetsky VS, Chung SL, Kamenetsky MB, Kuzmin DV (2012) Picrites from the Emeishan Large Igneous Province, SW China: a compositional continuum in primitive magmas and their respective mantle sources. J Petrol 53:2095–2113CrossRef
  Kilinc A, Carmichael ISE, Rivers ML, Sack RO (1983) The ferric-ferrous ratio of natural silicate liquids equilibrated in air. Contrib Miner Petrol 83:136–140CrossRef
  Kress VC, Carmichael ISE (1991) The compressibility of silicate liquids containing Fe2O3 and the effect of composition, temperature, oxygen fugacity and pressure on their redox states. Contrib Miner Petrol 108:82–92CrossRef
  Liao M, Tao Y, Song X, Li Y, Xiong F. Multiple magma evolution and ore-forming processes of the Hongge layered intrusion, SW China: Insights from Sr-Nd isotopes, trace elements and platinum-group elements. J Asian Earth Sci. In press
  Lister GF (1966) The composition and origin of selected irontitanium deposits. Econ Geol 61:275–310CrossRef
  Lundgaard KL, Tegner C (2004) Partitioning of ferric and ferrous iron between plagioclase and silicate melt [J]. Contrib Miner Petrol 147:470–483CrossRef
  Ma Y, Ji XT, Li JC, Huang M, Kan ZZ (2003) Mineral resources of the Panzhihua region. Sichuan Science and Technology Press, Chengdu, p 275 (in Chinese)
  McCanta MC, Dyar MD, Rutherford MJ, Delaney JS (2004) Iron partitioning between basaltic melts and clinopyroxene as a function of oxygen fugacity. Am Miner 89:1685–1693CrossRef
  Ottonello G, Moretti R, Marini L, Zuccolini MV (2001) Oxidation state of iron in silicate glasses and melts: a thermochemical model. Chem Geol 174:157–179CrossRef
  Pang KN, Meifu Zhou, Lindsley D, Malpas J (2008) Zhao DonggaoOrigin of Fe-Ti Oxide Ores in Mafic Intrusions: evidence from the Panzhihua Intrusion, SW China. J Petrol 49:295–313CrossRef
  Pang KN, Meifu Zhou, Liang Qi, Shellnutt JG, Wang CY, Donggao Zhao (2010) Flood basalt-related Fe–Ti oxide deposits in the Emeishan large igneous province, SW China. Lithos 119:123–136CrossRef
  Panxi Geological Unit (1984). Mineralization and Exploration Forecasting of V–Ti Magnetite Deposits in the Panzhihua-Xichang Region (in Chinese)
  Shan S, Luo T, Zhang BR, Zhang HF, Han Y, Zhao Z, Hu YK (1998) Chemical composition of the continental crust as revealed by studies in East China. Geochim Cosmochim Acta 62:1959–1975CrossRef
  Shellnutt JG, Pang KN (2012) Mineral compositions of the Late Permian Baima layered gabbroic intrusion: constraints on petrogenesis. Miner Petrol 106:75–88CrossRef
  Sobolev AV, Chaussidon M (1996) H2O concentrations in primary melts from suprasubduction zones and mid-ocean ridges: implications for H2O storageandrecycling in the mantle. Earth Planet Sci Lett 137:45–55CrossRef
  Song XY, Zhou MF, Hou ZM (2001) Geochemical constraints on the mantle source of the upper Permian Emeishan continental flood basalts, southwestern China. Int Geol Rev 43:213–225CrossRef
  Sun SS, McDonough WF (1989) Chemical and isotopic systematics of oceanic basalts: implications for mantle composition and processes. In: Saunders AD, Norry MJ (eds.), Magmatism in the ocean basin. Geol Soc Lond Spec Publ 42:313–345CrossRef
  Thy P, Lesher CE, Tegner C (2009) The Skaergaard liquid line of descent revisited. Contrib Miner Petrol 157:735–747CrossRef
  Toplis MJ, Carroll MR (1995) An experimental study of the influence of oxygen fugacity on Fe–Ti oxide stability, phase relations, and mineral-melt equilibria in ferro-basaltic systems. J Petrol 36:1137–1170CrossRef
  Wager LR, Brown GM (1968) Layered igneous rock. Oliver and Boyd, Edinburgh, p 588
  Wang CY, Zhou MF (2013) New textural and mineralogical constraints on the origin of the Hongge Fe–Ti–V oxide deposit, SW China. Miner Deposita 48:787–798CrossRef
  Wang CY, Zhou MF, Zhao D (2008) Fe–Ti–Cr oxides from the Permian Xinjie mafic–ultramafic layered intrusion in the Emeishan Large Igneous Province, SW China: crystallization from Fe- and Ti-rich basaltic magmas. Lithos 102:198–217CrossRef
  Xing CM, Wang CY, Zhang MJ (2012) Volatile and C–H–O isotopic compositions of giant Fe–Ti–V oxide deposits in the Panxi region and their implications for the sources of volatiles and the origin of Fe–Ti oxide ores. Sci China 55:1782–1795CrossRef
  Xu YG, Chung SL, Jahn BM, Wu G (2001) Petrological and geochemical constraints on the petrogenesis of Permian-Triassic Emeishan flood basalts in Southwestern China. Lithos 58:145–168CrossRef
  Xu YG, Houjun M, Xu J, Huang X, Wang Y, Chung SL (2003) The differentiation trend and genesis of two tpyes of magma in Emeishan large igneous province, Southwest China. Chin Sci Bull 48:383–387CrossRef
  Zhong Hong and Zhu Weiguang (2006) Geochronology of layered mafic intrusions from the Pan-Xi area in the Emeishan large igneous province, SW China. Mineral Deposita. 41, 599–606
  Zhong H, Zhou XH, Zhou MF, Sun M, Liu BG (2002) Platinum-group element geochemistry of the Hongge Fe–V–Ti deposit in the Pan-Xi area, southwestern China. Miner Deposita 37:226–239CrossRef
  Zhong H, Yao Y, Hu SF, Zhou XH, Liu BG, Sun M, Zhou MF, Viljoen MJ (2003) Trace-element and Sr–Nd isotopic geochemistry of the PGE-bearing Hongge layered intrusion, Southwestern China. Int Geol Rev 45:371–382CrossRef
  Zhong H, Yao Y, Prevec SA, Wilson AH, Viljoen MJ, Viljoen RP, Liu BG, Luo YN (2004) Trace-element and Sr–Nd isotopic geochemistry of the PGE-bearing Xinjie layered intrusion in SW China. Chem Geol 203:237–252CrossRef
  Zhong H, Hu RZ, Wilson AH, Zhu WG (2005) Review of the link between the Hongge layered intrusion and Emeishan flood basalts, southwest China. Int Geol Rev 47:971–985CrossRef
  Zhongqing Z, Jiren L, Suohan T (1999) Sm-Nd ages of the Panxi layered basic-ultrabasic intrusions in Sichuan (in Chinese). Acta Geol Sin 73:263–271
  Zhou M, Malpas J, Song X, Robinson PT, Sun M, Kennedy AK, Lesher CM, Keays RR (2002) A temporal link between the Emeishan large igneous province (SW China) and the end-Guadalupian mass extinction. Earth Planet Sci Lett 196:113–122CrossRef
  Zhou MF, Robinson PT, Lesher CM, Keays RR, Zhang CJ, Malpas J (2005) Geochemistry, petrogenesis and metallogenesis of the Panzhihua gabbroic layered intrusion and associated Fe–Ti–V oxide deposits, Sichuan Province, SW China. J Petrol 46:2253–2280CrossRef
  Zhou M, Zhao J, Qi L (2006) Zircon U-Pb geochronology and elemental and Sr–Nd isotope geochemistry of Permian mafic rocks in the Funing area, SW China. Contrib Miner Petrol 151:1–19CrossRef
  Zhou MF, Arndt NT, Malpas J, Wang CY, Kennedy AK (2008) Two magma series and associated ore deposit types in the Permian Emeishan large igneous province, SW China. Lithos 103:352–368CrossRef
  
• 作者单位：Mingyang Liao (1) (2)
  Yan Tao (1)
  Xieyan Song (1)
  Yubang Li (1) (2)
  Feng Xiong (1) (2)
  
  1. State Key Laboratory of Ore Deposit Geochemistry, Institute of Geochemistry, Chinese Academy of Sciences, Guiyang, 550002, China
  2. University of Chinese Academy of Sciences, Beijing, 100049, China
  
• 刊物主题：Geochemistry;
• 出版者：SP Science Press
• ISSN：1993-0364

文摘

Economic concentrations of Fe–Ti oxides occurring as massive layers in the middle and upper parts of the Hongge intrusion are different from other layered intrusions (Panzhihua and Baima) in the Emeishan large igneous province, SW China. This paper reports on the new mineral compositions of magnetite and ilmenite for selected cumulate rocks and clinopyroxene and plagioclase for basalts. We use these data to estimate the oxidation state of parental magmas and during ore formation to constrain the factors leading to the abundant accumulation of Fe–Ti oxides involved with the Hongge layered intrusion. The results show that the oxygen fugacities of parental magma are in the range of FMQ−1.56 to FMQ+0.14, and the oxygen fugacities during the ore formation of the Fe–Ti oxides located in the lower olivine clinopyroxenite zone (LOZ) and the middle clinopyroxenite zone (MCZ) of the Hongge intrusion are in the range of FMQ−1.29 to FMQ−0.2 and FMQ−0.49 to FMQ+0.82, respectively. The MELTS model demonstrates that, as the oxygen fugacity increases from the FMQ−1 to FMQ+1, the proportion of crystallization magnetite increases from 11 % to 16 % and the crystallization temperature of the Fe–Ti oxides advances from 1134 to 1164 °C. The moderate oxygen fugacities for the Hongge MCZ indicate that the oxygen fugacity was not the only factor affecting the crystallization of Fe–Ti oxides. We speculated that the initial anhydrous magma that arrived at the Hongge shallow magma chamber became hydrous by attracting the H₂O of the strata. In combination with increasing oxygen fugacities from the LOZ (FMQ−1.29 to FMQ−0.2) to the MCZ (FMQ−0.49 to FMQ+0.82), these two factors probably account for the large-scale Fe–Ti oxide ore layers in the MCZ of the Hongge intrusion. Keywords Oxygen fugacity Fe–Ti oxide deposit Basalts Emeishan large igneous province Hongge layered intrusion