新疆北山地区红石山镁铁-超镁铁岩体的岩石矿物学特征:对同化混染和结晶分异过程的启示
Petrological and mineralogical characteristics of Hongshishan mafic-ultramafic complex in Beishan area, Xinjiang: Implications for assimilation and fractional crystallization
-
摘要: 结晶分异和同化混染是侵入岩体形成过程中控制岩相成分和分异程度的主导因素。探讨这两个因素在岩浆演化过程中的作用阶段及对矿物成分变化的影响对揭示岩体成因和成矿具有重要意义。新疆北山地区的红石山镁铁-超镁铁岩体钻孔剖面上岩相和各种矿物含量的渐变特征反映了岩浆演化的结晶分异过程。长石中Si、Na、Al、Ca和单斜辉石中Si、Al、Ti、Ca、Mg的系统变化揭示不同程度的同化混染作用。橄榄石和尖晶石对同化混染作用的反应较为迟缓,但其Fo、Ni和Cr#、Ti对新鲜岩浆注入较为敏感。这些矿物化学对岩浆演化过程的推断与全岩成分变化的指示相一致。因此,矿物化学在研究岩浆演化方面将会发挥重要作用。Abstract: Fractional crystallization and assimilation constrain lithological composition and fraction, and play a key role in the formation of intrusive complex. Both processes can modify mineral compositions and the order of crystallization and have important significances for petrogenesis and associated metallogenesis. Hongshishan mafic-ultramafic complex in Beishan area (Xinjiang) displays gradual transition in lithology and mineral modal, which demonstrates fractional crystallization. Si, Na, Al, Ca in plagioclase and Si, Al, Ti, Ca, Mg in clinopyroxene have systematic variations and indicate assimilation in different extent. Whereas, olivine and spinel are not sensitive to assimilation process, but multiple magma injection in terms of Fo, Ni and Cr#, Ti contents. These assumptions inferred from mineral chemistry are consistent with those from whole rock compositional variations. Therefore, mineral chemistry is an alternative tool to trace magma evolution.
-
[1] 新疆地矿局第六地质大队,新疆哈密市红石山铜镍矿普查报告,2008.
[2] Bowen NL,The Evohtion of the Igneous Rocks,Princeton,New Jersey:Princeton University Press,1928.
[3] Bozhilov KN,Green HW,Dobrzhinetskaya LF,Quantitative 3D measurement of ilmenite abundance in Alpe Arami olivine by confocal microcopy:Confirmation of high-pressure origin,American Mineralogist,2003.
[4] Brandon AD,Hooper PR,Goles GG,Lamber RStJ,Evaluating crustal contamination in continental basalts:The isotopic composition of the Picture Gorge Basalt of the Columbia River Basalt Group,Contributions to Mineralogy & Petrology,1993.
[5] Bureau of Geology and Mineral Resources of Xinjiang Uygur Autonomous Region,Regional Geology of Xinjiang Uygur Autonomous Region,北京:地质出版社,1993.
[6] 柴凤梅.张招崇.毛景文.董连慧.张作衡.叶会寿.吴华.莫新华 中天山白石泉镁铁-超镁铁质岩体岩石学与矿物学研究 [J].-岩石矿物学杂志2006(1)
[7] Chai FM,Zhang ZC,Mao JW,Dong LH Zhang ZH and Wu H,Goology,petrology and geochemistry of the Baishiquan Ni-Cu-beating mafic-ultramafic intrusions in Xinjiang,NW China:Implications for tectonics and genesis of ores,Journal of Asian Earth Sciences,2008.
[8] Chen LH,Zhou XH,Chen SH,Zhang GH,Chromite lamellae in olivine of dunite,Seisemology and Geology,2000.
[9] Gaetani GA,Grove TL,Bryan WB,The influence of water on the petrogenesis of subduction-related igneous rocks,Nature,1993.
[10] Hansen H,Nielsen TFD,Crustal contamination in Palaeogene East Greenland flood basalts:Plumbing system evolution during continental rifting,Chemical Geology,1999.
[11] 姜常义.程松林.叶书锋.夏明哲.姜寒冰.代玉财 新疆北山地区中坡山北镁铁质岩体岩石地球化学与岩石成因 [J].-岩石学报2006(1)
[12] Kretz R,Transfer and exchange equilibria in a portion of the pyroxene quadrilateral as deduced from natural and experimental data,Geochimica et Cosmochimica Acta,1982.
[13] 李金祥.秦克章.徐兴旺.孙赫.程松林.吴华.莫新华 新疆东天山白石泉Cu-Ni硫化物矿床杂岩体的地球化学特征及其对矿床成因和构造背景的制约 [J].-矿床地质2007(1)
[14] Maier WD,Arndt NT,Curl EA,Progressive crustal contamination of the Bushveld complex:Evidence from Nd isotopic analysis of the cumulate rocks,Contributions to Mineralogy & Petrology,2000.
[15] Mao JW,Pirajno F,Zhang ZH,Chai FM WuH Chen SP Cheng SL Yang JM and Zhang CQ,A review of the Cu-Ni sulphide deposits in the Chinese Tianshan and Altay orogens(Xinjiang Autonomous Region,NW China):Principal characteristics and oreforming processes,Journal of Asian Earth Sciences,2008.
[16] Marsh JS,Geochemical constraints on coupled assimilation and fractional crystallization involving upper crustal compositions and continental tholeiitic magma,Earth and Planetary Science Letters,1989.
[17] Morse SA,Basalts and Phase Diagram,New York:springer-verlag,1980.
[18] Nimis P,Taylor WR,Single Cpx thermobarometry for garnet peridorites.Part Ⅰ.Calibration and testing of a Cr-in-Cpx barometer and an enstatite-in-Cpx thermometer,Contributions to Mineralogy & Petrology,2000.
[19] 牛耀龄 玄武岩浆起源和演化的一些基本概念以及对中国东部中-新生代基性火山岩成因的新思路 [J].-高校地质学报2005(1)
[20] Picerillo EM,Civetta L,Petrini R,Longinelli A Bellieni G Comin-Chiararnonti P Marques LS and Melfi AJ,Regional variations within the Parans flood hasalts(southerm Brazil):Evidence for subcontinental mantle heterogeneity and crustal contamination,Chemical Geology,1989.
[21] Preston RJ,Bell BR,Cognate gabbroic xenoliths from a tholeiitic subvolcanic sill complex:Implications for fractional crystallization and crustal contamination processes,Mineralogical Magazine,1997.
[22] Qin KZ,Fang TH,Wang SL,Plate tectonics division,evolution and metallogenic settings in eastern Tianshan mountains,NW China,Xinjiang Geology,2002.
[23] Qin KZ,Zhang LC,Xiao WJ,Xu XW,Yan Z and Mao,Overview of major Au,Cu,Ni and Fe deposits and metallogenie evolution of the eastern Tianshan Mountains,northwestern China,London,2003.
[24] 秦克章.丁奎首.许英霞.孙赫.徐兴旺.唐冬梅.毛骞 东天山图拉尔根、白石泉铜镍钴矿床钴、镍赋存状态及原岩含矿性研究 [J].-矿床地质2007(1)
[25] Sarkar A,Ripley EM,Li CS,Maier WD,Stable isotope,fluid inclusion,and mineral chemistry constraints on contamination and hydrothennal alteration in the Uitkomst Complex.South Africa,Chemical Geology,2008.
[26] Stevenson RK,Henry P,Gariepy C,Isotopic and geochemical evidence for differentiation and crustal contamination from granitoids of the Berens river subprovince,Superior province,Canada,Precambrian Research,2009.
[27] 孙赫.秦克章.李金祥.徐兴旺.三金柱.丁奎首.惠卫东.许英霞 东天山图拉尔根铜镍钴硫化物矿床岩相、岩石地球化学特征及其形成的构造背景 [J].-中国地质2006(3)
[28] 孙赫.秦克章.徐兴旺.李金祥.丁奎首.许英霞.三金柱 东天山镁铁质-超镁铁质岩带岩石特征及铜镍成矿作用 [J].-矿床地质2007(1)
[29] Tang DM,Qin KZ,Sun H,Qi L,Xiao QH and Su BX,PGE geochemical characteristics of Tianyu magmatic Cu-Ni deposit:Implications for magma evolution and sulfide segregation,Acta Geologica Sinica,2009.
[30] Tang DM,Qin KZ,Sun H,Su BX,Xiao OH,Cheng SL and Li J,Lithological.chronological and geochemical characteristics of Tianyu Cu-Ni deposit,East Tianshan:Constraints on source and genesis of mafic-ultramafic intrusions in East Xinjiang.Acta Petrologica Sinica,Acta Petrologica Sinica,2009(4).
[31] Wood DA,The application of a Th-Hf-Ta diagram to problems of tectonomagmatic classification and to establishing the nature of crustal contamination of basaltic lavas of the British Tertiary Volcanic Province,Earth and Planetary Science Letters,1980.
[32] Yoder HSJ,Diopside-anorthite-water at fine and ten kilobars and its bearing on explosive volcanism,Carnegie Institution of Washington Yearbook,1965.
[33] Zen EA,Aluminum enrichment in silicate melts by fractional crystallization:Some mineralogic and petrographic constraints,Journal of Petrology,1986.
[34] 柴凤梅.张招崇.毛景文.董连慧.张作衡.叶会寿.吴华.莫新华 中天山白石泉镁铁-超镁铁质岩体岩石学与矿物学研究 [J].-岩石矿物学杂志2006(1)
[35] 陈立辉,周新华,陈绍海,张国辉,纯橄岩中橄榄石的铬铁矿出溶页片,地震地质,2000.
[36] 姜常义.程松林.叶书锋.夏明哲.姜寒冰.代玉财 新疆北山地区中坡山北镁铁质岩体岩石地球化学与岩石成因 [J].-岩石学报2006(1)
[37] 李金祥.秦克章.徐兴旺.孙赫.程松林.吴华.莫新华 新疆东天山白石泉Cu-Ni硫化物矿床杂岩体的地球化学特征及其对矿床成因和构造背景的制约 [J].-矿床地质2007(1)
[38] 秦克章.方同辉.王书来.朱宝清.冯益民.于海峰.修群业 东天山板块构造分区、演化与成矿地质背景研究 [J].-新疆地质2002(4)
[39] 秦克章.丁奎首.许英霞.孙赫.徐兴旺.唐冬梅.毛骞 东天山图拉尔根、白石泉铜镍钴矿床钴、镍赋存状态及原岩含矿性研究 [J].-矿床地质2007(1)
[40] 孙赫.秦克章.李金祥.徐兴旺.三金柱.丁奎首.惠卫东.许英霞 东天山图拉尔根铜镍钴硫化物矿床岩相、岩石地球化学特征及其形成的构造背景 [J].-中国地质2006(3)
[41] 孙赫.秦克章.徐兴旺.李金祥.丁奎首.许英霞.三金柱 东天山镁铁质-超镁铁质岩带岩石特征及铜镍成矿作用 [J].-矿床地质2007(1)
[42] 唐冬梅,秦克章,孙赫,漆亮,肖庆华,苏本勋,东疆天字岩浆Cu-Ni矿床的铂族元素地球化学特征及其对岩浆演化、硫化物熔离的指示,地质学报,2009.
[43] 唐冬梅,秦克章,孙赫,苏本勋,肖庆华,程松林,李军,天宇铜镍矿床的岩相学、年代学、地球化学特征:对东疆镁铁-超镁铁质岩体源区和成因的制约,岩石学报,2009(4).
[44] 新疆维吾尔自治区地质矿产局,新疆维吾尔自治区区域地质志,北京:地质出版社,1993.
计量
- 文章访问数: 8730
- PDF下载数: 7916
- 施引文献: 0