摘要
<正>
1.MaterialcompositionofthegeosynclinaltectonicLayerThegeosynclinaltectoniclayerismainlycomposedofthefollowingtwoparts:sandyslaterocksofPrecambrinandvolcanicrocksinbededwithinthesand-slaterocks.Thesandy-slaterocksembracethechemicalcompositionalcharacteristicsoflightmetamorphicrocks:SiO2=54.5681.63（Wt%）,withaverageof63.96（wt%）（n=58,thesameasfollowing）;Al2O3=9.4717.75（wt%）,withaverageof15.36（wt%）,andAl2O3>K2O+Na2O+CaO;thecontentof（FeO+Fe2O3）variesgreatlywithFeO>Fe2O3;（CaO+MgO）=0.789.22（wt%）withaverageof23（wt%）,andMgO>CaO;theratiosofK2O/Na2Orangfrom2to4（>1）.Bycomparingallthischemicaldatawiththatoftheotherkindrocks,Wecanknowthatthesandy-slaterocksweretheeunicand/orbathyalsedimentswhichformedunderthestronglyactiveeugeosynclinaltectonicsetting.
出版日期
1996年08月21日（中国Betway体育网页登陆平台首次上网日期，不代表论文的发表时间）
