全部 标题 作者
关键词 摘要

OALib Journal期刊
ISSN: 2333-9721
费用:99美元

查看量下载量

相关文章

更多...
地质学报  2009 

新疆巴楚地区金伯利质角砾橄榄岩物质组成及含矿性研究

, PP. 1276-1301

Keywords: 新疆,巴楚,金伯利质角砾橄榄岩,金刚石,含矿性

Full-Text   Cite this paper   Add to My Lib

Abstract:

本文讨论出露于新疆巴楚瓦吉里塔格地区的一种角砾状超镁铁岩,其结构、成分复杂,由超镁铁岩包体、斑晶(或捕晶)及基质三部分构成。超镁铁岩包体常见单辉辉石岩、纯橄岩,其次有少量橄榄辉石岩。研究表明均属基性岩浆结晶岩,本次研究未见幔源橄榄岩包体;斑晶主要为橄榄石,次为金云母,基质由微晶(10~40μm)单斜辉石、钙铁榴石、钙钛矿、磁铁矿(或含钛磁铁矿)、蛇纹石、碳酸盐及金属硫化物等组成;捕晶包括单斜辉石、褐色角闪石、磷灰石、含钛磁铁矿等。多种地球化学判别图均指示其属金伯利岩类,但低MgO和低Mg??#?比值、高TFe??2?O??3?和CaO等区别于世界典型金伯利岩。与典型金伯利岩有相似之处,该类岩石均具有向右陡倾的REE配分型式,但(La/Yb)n比值略偏低;微量元素蛛网图也与典型金伯利岩基本一致,仅显示更加富集不相容元素,具有更显著K,Ti负异常,且部分样品出现Rb,Zr,P负异常,指示其源区地幔交代程度偏低。鉴于岩石的产状、结构构造、矿物组合和地球化学性质近似于金伯利岩,但缺少高铬铬铁矿、镁铝榴石、镁钛铁矿等金伯利岩指示矿物,故不属典型的金伯利岩,可称之为金伯利质角砾橄榄岩。就少量研究样品所示信息,该类岩石不具有寻找金刚石的潜在远景,但鉴于巴楚及邻区尚有许多角砾状超镁铁岩岩墙和岩脉出露,该区金刚石成矿条件有待更进一步的研究。

References

[1]  杜品龙.1983.瓦吉里塔格金伯利岩岩体地地质特征简介.新疆地质,1(2):55~63.
[2]  李昌年,路风香,陈美华.2001.新疆瓦吉里塔格火成杂岩体岩石学研究.新疆地质,1:38~42.
[3]  梁日暄,方青松.1991.新疆巴楚瓦吉里塔格"金伯利岩"的新认识.地质论评,37(1):95-96.
[4]  苏犁.1991.新疆巴楚瓦吉里塔格金伯利岩矿物中岩浆包裹体研究,中国地质科学院地质矿产研究所所刊.32:15~33.
[5]  隋延辉,戚长谋,等.2003.金伯利岩中铬的相态及找矿地球化学信息――以华北地台为例.世界地质,4:373~375.
[6]  王福同,冯京.2000.新疆金刚石原生矿成矿地质条件及找矿方向.新疆地质,18 (1):32-41.
[7]  王懿圣,苏犁.1987.新疆巴楚瓦吉里塔格金伯利岩岩石矿物特征及其某些相关地区对比.西安地质矿产研究所所刊,15:47~56.
[8]  Bellis A j,Canil D.2007.Ferric Iron in CaTiO3 Perovskite as an Oxygen Barometer for Kimberlitic Magmas I:Experimental Calibration.Jour.Petrol.,48(2):219~230.
[9]  Boyd F R,Gurney J J.1982.Low-calcium garnets:key to craton structure and diamond crystallization.Carnegie Insitute Yearbook,8(1):57~81.
[10]  Canil D,Bellis A J,2007.Ferric Iron in CaTiO3 Perovskite as an Oxygen Barometer for Kimberlite magmas II:Application.Jour.Petrol.,48(2):231~252.
[11]  Clark S H,Ringwood A E,1964,Density dietribution and constitution of the mantle.Res.Geophysics,V.2,35~88.
[12]  Dalton J A,Presnall D C.1998.Carbonatitic melts along the solidus of model lherzolite in the system CaO-MgO-Al2O3-SiO2-CO2 from 3 to 7 GPa,Cont.Mineral.Petrol.,131:123~135.
[13]  Dawson J B.1971.Advances in kimberlite geology.Earth Sci.Rev.,7:187~214.
[14]  Eccles D R,Haeman L M,Luth R W,et al.,2004.Petrogenesis of the Late Cretaceous northern Alberta kimberlite province.Lithos,76,435~459.
[15]  Gurney J J,Helmstaedt H H,Roes AP L,et al.2005.Diamonds:Crustal distribution and formation rocesses in time and space and an integrated deposit model,Society of Economic Geologists,INC.,Economic Geology 100th Anniversary Volume:143~177.
[16]  姜常义,张蓬勃,卢登荣,等.2004.新疆巴楚塔里木板块西部瓦吉里塔格地区二叠纪超镁铁岩的岩石成因与岩浆源区.岩石学报,6:1433~1444.
[17]  Hauri E.H.2002.Osmium isotopes and mantle convection:Royal Society of London.Philosophical Transactions series A,360:2371~2382.
[18]  Janse,A J A.1994a.Is Clifford\'s Rule still valid?.In:H.O.A.Meyer and O.H.Leonardos,Editors,Kimberlites,Related Rocks and Mantle Xenoliths,Proceedings of the 5th International Kimberlite Conference,Araxa,Special Publication 1/A Jan 94 vol.2,Companhia de Pesquisa de Recursos Minerais-CPRM,Brasilia (1994),215~235.
[19]  Janse A J A.1975.Kimberlite and relaed rocks of the Nama plateau of South West Aferica,Physics Chemistry of the Earth,9:81~94.
[20]  Jones A P,Wylie P J.1984.Minor elements in perovskite from kimberlitrs and the distribu-tion on rare earth elements:An electron probe study.Earth Planet.Sci.Lett.,69:128~140.
[21]  Kopylova M G,Hayman P.2008.Petrology and texture claasification of the Jericho kimberlite,Northern Slave Province,Nunavut,Canada.Canadian Jour.Earth Sciences,45(6):701~723.
[22]  Le Roex A P,Bell D R.2003.Petrogenesis of Group I Kimberlites from Kimberley,South Africa:Evidence from bull-rock geochemistry.Jour.Petrol.,44(12):2261~2286.
[23]  Lloyd F E,Stoppa F.2003.Pelletal Lapilli in Diatremes-Some inspiration from he old Masters.Geolines:15.
[24]  Menzies M A,Fan W M,Zhang M.1993.Paleozoic and Cenozoic lithoprobes and the loss of 》120km of Archean lithosphere,Sino-Korean craton,China.In Magmatic processes and plate tectonics (eds.H.M.Prichard,T.Alabaster,N.B.W.Harris,and C.R.Neary).Geol.Soc.Spec.Publ.76,71~81.
[25]  Meyer H O A.1985.Genesis of diamond:A mantle sage.Am.Mineral.,70:344~355.
[26]  Mitchell R H.1986.Kimberlites-Mineralogy,Geochemistry and Petrology,Plenum Press,New York.
[27]  Wyllie P J.1980.The origin of kimberlite,J.Geophys.Res.,85:6902~6910.
[28]  Wyllie P J and Lee W.1999.Kimberlites,carbonatites,peridotites and silicate-carbonate liquid immiscibility explained in parts of the system CaO-(MgO+FeO*)-(Na2O+K2O)-(SiO2+ Al2O3 +TiO2)-CO2,Proceedings 7th Intern.Kimberlite Conference,Cape Town.April 1998,Volume 2:923~932.
[29]  王懿圣等.1989.新疆巴楚瓦吉里塔格地区金伯利岩物质成分及成矿条件研究.内部资料.
[30]  陈美华.2000.新疆巴楚金伯利岩含矿性及金刚石内部特征研究.博士论文,摘自博士论文资料库.
[31]  Gurney J J,Moore R O.1993.Geochemical coorelation between kimberlitic indicator minerals and diamonds:In:Sheahan P,Chater A,(eds.) Diamonds:Exploration,Sampling and Evalution,Shortcourse Proceeding.Prospectors and Devilopers Association of Canada,Toronto,147~171.Gurney J J,Zweistra P.1995.The interpretation of the major element compositions of mantle minerals in diamond exploration.Jour.,Geochemicao Exploration,53:293~309.
[32]  Haggerty S E.1986.Diamond genesis in a multipty-constrained model.Nature,320:6057.
[33]  Mitchell R H.1991.Kimberlites and lamproites:primary sources of diamonds.Geoscience,Canada 18,1 ~16.
[34]  Morris T F,Sage R P,Ayer J A,et al.2002.A study of clinopyroxene composition:implications for kimberlite exploration.Geochemistry:Exploration,Environment,Analysis,2:321~331.
[35]  Nowicki T,Crawford B,Dyck D,Carlson J,et al.2004.The geology of kimberlite pipes of the Ekati property,Northwest Territories,Canada.Lithos,76:1~28.
[36]  Pearson D G,Shirey S B.1999a.Isotopic dating of diamonds.Rev.Econ.Petrol.,146:696~714.
[37]  Pearson D G,Shirey S B,Bulanova G P,et al.1999b.Dating and paragenetic distribution of diamonds using Re-Os isotope system:application of some Siberian diamonds.Proceedings of the 7th Internaational Kimberlite Conference,2:637~643.
[38]  Price S E,Russel J K,Lova M G K.2000.Primitive magma from the Jericho Pipe,N.W.T.,Canada:Constraints on primary kimberlite melt chemistry.Jour.Petrol.,41(6):789~808.
[39]  Quirt D H.2004.Cr-diopside (Cpx) as a kimberlite indicator mineral for diamond exploration in glaciated terrians,19th Annual meeting of geological Association and Mineralogical Association of Canada,Brock University,St.Catharines,Ontario.
[40]  Rehfelt T,Jacob D E,Carlson R W,et al.2007.Fe-rich dunite xenoliths from South African kimberlites:cumulates from Karoo flood basalts.Jour.Petrol.,48(7):1387~1410.
[41]  Robinson D N,1978.The characteristics of natural diamond and their interpretation.Minerals Science and Engneering,10(2):55~72.
[42]  Schulze A J.1987.Megacrysts from alkalic volcanic rocks,Mantle Xenoliths.Eduted by Nixon,P.H.,John Wiley & Sons Ltd.77:749~764.
[43]  Simandl G J,Ferbey T,levson V M,et al.2004.Kimberlite indicator minerals in the Fort Nellson Area,Northeastern British Columbia.Geological Fieldwork,Paper 2004:1.
[44]  Sun S S and McDonough W F.1989.Chemical and isotopic systematic of oceanic basalts:implications for mantle composition and processes.In:Saunders A.D.and Norry M.J.(eds),Magmatism in ocean basins.Geol.Soc.London.Spec.Publ.42:313~345.
[45]  Tayloy S R and Mclennan S M.1985.The continental crust:its composition and evolution.Oxford:Blackwell.
[46]  Trofimov V S.1971.On the origin of diamontiferous diatremes,Bull.Volcanol.24:767~776.
[47]  Wyatt B A,Baumgartner M,Anckar E,et al.2004.Compositional classification of "Kimberlitic" and "non-Kimberlitic" ilmenite.Lithos 77:819~840.

Full-Text

Contact Us

service@oalib.com

QQ:3279437679

WhatsApp +8615387084133