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1、礦物巖石地球化學(xué)通報·綜述·BulletinofMineralogy,PetrologyandGeochemistryVo1.33No.1,Jan.2014磁綠泥石成分、結(jié)構(gòu)及其形成環(huán)境研究進展李曉光,劉欽甫,程宏飛,康艷霞,孫波中國礦業(yè)大學(xué)(北京)地球科學(xué)與測繪工程學(xué)院,北京100083摘要:磁綠泥石化學(xué)成分類似于綠泥石,但屬于蛇紋石結(jié)構(gòu)。研究中常將其誤認為是高嶺石或鮞綠泥石,國內(nèi)相關(guān)研究極為有限。作者綜述了各地發(fā)現(xiàn)的磁綠泥石及其形成環(huán)境特點,將其形成環(huán)境分為兩類:①海相環(huán)境,常在海相鮞粒鐵質(zhì)巖中以鮞粒形式產(chǎn)出,海相磁綠泥石多
2、指示溫暖、富鐵且為還原環(huán)境的海域;②非海相環(huán)境,在北極荒漠土、煤炭沼澤、紅土帶、淡一半成水的河漫灘和河口灣、火山成因塊狀硫化物礦床、三角洲、燧石黏土、花崗巖和變質(zhì)巖中產(chǎn)出,多由海綠石、綠泥石、高嶺石、鈦云母、或紅土轉(zhuǎn)化形成。對磁綠泥石進行礦物學(xué)以及成因環(huán)境研究,有助于黏土礦物學(xué)研究的完善,對磁綠泥石產(chǎn)區(qū)的古環(huán)境分析也將大有裨益。關(guān)鍵詞:磁綠泥石;0.7nrn綠泥石;化學(xué)組成;結(jié)構(gòu);形成環(huán)境中圖分類號:P571;P575文獻標志碼:A文章編號:1007—2802(2014)010116-08doi:10.3969/j.issn.1
3、007—2802.2014.01.004ChemicalConstituent,StructureandFormationEnvironmentofBerthierineIIXiao—guang,LIUQin-fu,CHENGHong—fei,KANGYah—xia,SUNBoSfhoolofGeoscienceandSurveyingEngineering,ChinaUniversityofMining&Technology(Beijing),Beijing100083,ChinaAbstract:Berthierineisa
4、kindofclaymineralthatsimilartochlorite,havingtheserpentine—typestructure.Itwasoftenmistakenforkaoliniteorchamositeinformerstudies.Thispaperdiscussedthecharacteristicsofberthierineformationindifferentenvironmentsaroundtheworld.Theformationenvironmentofberthierinecanbe
5、dividedintotwocategories:①marineenvironment,inwhichberthierineoftenhasarelationshipwithmarineooliticironstones.Itcanbeauthigenicassphericalparticlesintropicalwaters.Berthierineoftenindicatesareducingmarineenviron—mentofwarmandFe—rich.②non—marineenvironmentincludingar
6、cticdesertsoi1,coalswamp,laterite,freshtobrackishfloodplainandestuarine,massivesulfidedeposit,delta,flintclay,exhalative—sedimentaryoresandgranit—icpegmatite.Thesekindsofberthierinecanbetransformedfromglauconite,chlorite,kaolinite,odiniteorlaterite.Itisofgreatsignifi
7、canceforthestudyofclaymineralogyandpaleoenvironmentalanalysisoftheresearchareatostudythemineralogycharacteristicsandformingenvironmentofberthierine.Keywords:berthierine;0.7nmchlorite;chemicalconstituents;structure;formationenvironment磁綠泥石是一種富鐵、鋁的1:1型三八面體層在較早的研究中],磁綠泥
8、石曾被稱為高嶺石狀硅酸鹽礦物,具有0.7nm的基面間距,屬于蛇紋型鮞綠泥石(kaolin—typechamosite),0.7nm綠泥石族u。最早在1820年,法國礦物學(xué)家Berthier石(septechlorite),鎂鐵蛇紋石(septechamosite