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...
地球学报  2009 

新疆萨尔托海铬铁矿造矿铬尖晶石蚀变特征及指示意义

DOI: 10.3975/cagsb.2009.05.05

Keywords: 新疆萨尔托海,铬尖晶石,蚀变特征

Full-Text   Cite this paper   Add to My Lib

Abstract:

本文通过对萨尔托海矿区25矿群矿体边部、接近围岩造矿铬尖晶石的镜下观察发现:造矿铬尖晶石由三部分组成,自核部至边部依次是未蚀变的核部(灰色)、早期蚀变的中间带(灰白色)和晚期蚀变的边部(浅灰色)。探针分析上述三部分的成分,得出早期蚀变中Al大量流失,而Fe发生富集,晚期蚀变Al、Cr、Mg相对于早期蚀变发生富集,而Fe大量流失。通过研究区造矿铬尖晶石与国外变质超基性岩副矿物铬尖晶石对比,认为早期蚀变对应的低角闪岩相变质,温度为550℃~600℃,晚期蚀变对应的是绿片岩相变质,温度为350℃~500℃,核部对应蚀变环境介于低角闪岩相和高角闪岩相之间,稳定温度高于600℃,故未发生蚀变。通过分析区域变质特征并结合造矿铬尖晶石所处的空间部位,认为晚期蚀变是达拉布特蛇绿岩定位后期区域构造作用的结果,推测早期蚀变可能与蛇绿岩构造侵位有关。

References

[1]  索科洛夫;朱福湘;李秉伦;袁啟林,乌拉尔铬铁矿,北京:地质出版社,1958.
[2]  戚长谋,造矿铬尖晶石的蚀变,吉林大学学报(地球科学版),1978(03).
[3]  PURVIS A C;NESBITT R W;HALLBERG J A,The geology of part of the Carr Boyd Complex and its associated nickel mineralization,Western Australia,Economic Geology,1972.
[4]  PANAGOS A;OTIEMANN J,Cheroical Differentiation of Chromite Grains in the Nodular-Chromite from Rodiani (Greece),Mineralium Deposita,1966.
[5]  ABZALOV M Z,Chrome spinels in gabbro wehrlite intrusions of the Pechenga area,Kola Peninsula,Russia:emphasis on alteration features,Lithos,1998.
[6]  白文吉,关于超基性岩蛇纹石化的几个问题,中国地质,1964(07).
[7]  杨经绥;白文吉;方青松;戎合.西藏罗布莎蛇绿岩铬铁矿中的超高压矿物和新矿物(综述)[J].地球学报,2008(03)
[8]  王玉山,萨尔托海铬铁矿矿石学特征及其成因浅析,新疆地质,1988(03).
[9]  ZHANG Li-fei,Phase equlibrium of grossular bearing prehnite pumpellyite facies:An example from metabasites in Saertuohai ophiolite of Xinjiang,Acta Petrologica Sinica,1997(03).
[10]  WYLIE A G;CANDELA P A;BURKE T M,Compositional zoning in unusual Zn-rich chromite from the Sykesville district of Maryland and its beanng on the origin of the \'ferritchromit\',American Mineralogist,1987.
[11]  SACK R O;GHIORSO M S,Chromian spinels as petrogenetic dicators:thermodynamic and petrological applications,American Mineralogist,1991.
[12]  ROEDER P L,Chromite:from the fiery rain of chondrules to the Kilanea Iki lava lake,The Canadian Mineralogist,1994.
[13]  QI Chang-mou;RANG Mei;JIA Ke-shi;FAN Guo-chuan,Geochemistry of the alteration process of chromite,Journal of Jiling University(Earth Science Edition),1980.
[14]  EVANS B W,Metamorphism of alpine peridotite and serpentinites,Annual Review of Earth and Planetary Sciences? ,1977, 5.
[15]  EVANS B W;FROST B R,Chome-spinel in progressive metamorphism-a preliminary analysis,Geochimica et Cosmochimica Acta? ,1975, 39.
[16]  DICK H J B;BULLEN T,Chromian spinel as a petrogenetic indicator in abyssal and alpine-type peridotite and spatially associated lavas,Contributions to Mineralogy & Petrology,1984.
[17]  BURKHARD D J M,Accessory chromium spinels:their coexistence and alteration in serpentinites,Geochimica et Cosmochimica Acta,1993.
[18]  BERNARD W;EVANS B;RONALD F,Chrome-spinel in progressive metamorphism-a preliminary analysis,Geochimica et Coemochimics Acta,1975.
[19]  BARNES S J;ROEDER P L,The range of spinel compositions in terrestrial maric and ultramafic rocks,Journal of Petrology,2001.
[20]  戚长谋;稂玫;贾克实;范国传,铬铁矿次变的地球化学,吉林大学学报(地球科学版),1980(04).
[21]  PROENZA J A;ZACCARINI F;ESCAYOLA M;CABANA C SCHALAMUK A GARUTI G,Composition and textures of chromite and platinum-group minerals in chromitites of the western ophiolitic belt from Pampean Ranges of C6rdoba,Argentina,Ore Geology Reviews,2007.
[22]  陈世忠;杨经绥;许志琴;李天福 陈方远.铬尖晶石和石榴石的相变:大陆科学钻探CCSD-PP3孔超镁铁岩超高压变质作用的证据[J].地球科学-中国地质大学学报,2006(04)
[23]  张立飞,含钙铝榴石的葡萄石-绿纤石相平衡:以新疆萨尔托海蛇绿岩中变基性岩石为例,岩石学报,1997(03).
[24]  陈正国;孙继文,青海茫崖超镁铁质岩蛇纹石化作用的氢氧同位素研究,地球化学,1992(04).
[25]  Γ А Соколов;ZHU Fu-xiang;LI Bin-lun;YUAN Qi-lin (translated),Chromite deposit in Ural,北京:地质出版社,.
[26]  YANG Jing-sui;BAI Wen-Ji;FANG Qing-song;RONG He.Ultrahigh-pressure Minerals and New Minerals from the Luobusa Ophiolitic Chromitites in Tibet:A Review[J].Acta Geoscientiea Sinica,2008(03)
[27]  WINTER J W,An Introduction to Igneous and Metamorphic PetroloRy,Prentic-Hall Inc.,EnRlewood Cliffs,NJ,2001.
[28]  WANG Yu-shan,The characteristics of ore in Saertuohai chromite deposit and origin analysis,Xinjiang Geology,1988(03).
[29]  THOMAS F,Alteration of chrome spinel in a dunite nodule from Lanzarote,Canary Islands,Lithos,1971.
[30]  SUITA M T;STREIDER A J,Cr-spinels from Brazilian mafic-ultramafic complexes:metamorphic modifications,International Geology Review,1996.
[31]  QI Chang-mou,Alteration of ore-forming Cr-spinel,Journal of Jiling University(Earth Science Edition),1978.
[32]  EALES H V;WILSON A H;REYNOLD I M,Complex unmixed spinels in layered intrusions within an obducted ophiolite in the Natal-Namaqua mobile belt,Mineral Deposits,1988.
[33]  DOROTHEE J;BURKARD M,Accessory chromium spinels:Their coexistence and alteration in serpentinites,Geochimica et Cosmochimica Acta,1993.
[34]  CHEN Zheng-guo;SUN Ji-wen,Oxygen and hydrogen isotope studies of the serpentinization of ultramafic rocks at Mongya,Qinghal province,Geochimica,.
[35]  CHEN Shi-zhong;YANG Jing-sui;XU Zhi-qin;LI Tian-fu,CHEN Fang-yuan,Transformation of Chromium Spinel and Garnet:Evidence of CCSD-PP3 UItramatic Rocks Processed UHP Metamorphism,Earth Science-Joumal of China University of Geosciences,2006(04).
[36]  BARNES S J,Chromite in Komatiites.Ⅱ.Modifications dudng greenschist to mid-amphibolite facies metamorphism,Journal of Petrology,2000.
[37]  BAI Wen-ji,Some questions about Serpentined ultra-maric,Geology in China,1964(07).

Full-Text

Contact Us

service@oalib.com

QQ:3279437679

WhatsApp +8615387084133