冀西石湖金矿黄铁矿和石英的晶胞参数特征及其地质意义.pdf

《冀西石湖金矿黄铁矿和石英的晶胞参数特征及其地质意义.pdf》由会员上传分享，免费在线阅读，更多相关内容在行业资料-天天文库。

1、矿物岩石地球化学通报·研究成果·BulletinofMineralogy，PetrologyandGeochemistryVo1．29No．2，Apr．2010冀西石湖金矿黄铁矿和石英的晶胞参数特征及其地质意义曹烨～，李胜荣，张华锋，敖种，李真真，刘小滨1．中国地质大学地质过程与矿产资源国家重点实验室，北京100083；2．中国地质大学地球科学与资源学院，北京100083；3．劳伦森大学地球科学系，萨德伯里，P3E2C6，加拿大摘要：将石湖金矿的成矿过程划分为4个阶段：黄铁矿一石英阶段，石英一黄铁矿阶段，多金属硫化物阶段和石英一碳酸盐阶

2、段。分别对4个成矿阶段中的黄铁矿和石英进行了晶胞参数测定。结果表明，黄铁矿的ao和uo随着成矿阶段的演化和深度的增加有减小的趋势，且主成矿阶段为最小值；石英的c。和co／ao从I—Ⅳ阶段具有减小的趋势，石英ao值随深度增加而变大，而c。值和印。随深度增加呈韵律式变化。根据晶胞参数推测，黄铁矿中co、Ni、As含量高，且未发生S亏损；石英类质同象以Al、Fe等置换杂质为主。本区含矿黄铁矿和石英的晶胞参数分别以ao值较小和ao值较大，co值较小，co／ao值较小为特征。黄铁矿的a。和石英的c。和c。／a。绝大多数大于理想值，所以矿体剥蚀不大

3、，深远景广阔。关键词：黄铁矿；石英；晶胞参数；成因矿物学；金矿中图分类号：P579文献标识码：A文章编号：1007—2802(2010)02—018507CharacteristicsofCellparametersofPyriteandQuartzandTheirGeologicalSignificanceatShihuGoldDepositinWesternHebei，NorthChinaCAOYe·。～，LISheng—rong，ZHANGHua—feng，AOChong。，L1Zhenzhen。，LIUXiaobin。1．Sta

4、teKeyLaboratoryofgeologicalprocessesandmineralresources，ChinaUniversityofGeosciences，Beijing100083，China，；2．SchoolofEarthScienceandResources，ChinaUniversityofGeosciences，Beijing100083，China；3．DepartmentofEarthSciences，LaurentianUniversity，Sudbury，P3E2C6，CanadaAbstract：Go

5、ldMineralizationoftheShihudepositcanbedividedinto4stages，pyrite-quartzstage，quartz—pyritestage，polymetalliesulfidestageandquartzcarbonatestage．Cellparametersofpyriteandquartzfrom4stageswereanalyzedinthispaper．Theanalyticalresultsofpyriteindicatedthatthevalueofa0anduoismi

6、nimuminⅢstage；thevaluesofaoandundecreaseasmineralizationstageproceedsfrom工toIVandasthedepthofore-bodyin—creasesfrom560to180meters．TheanalyticalresultsofquartzindicatedthatthevaluesofC0andthee0／aoratiosdecreaseasmineralizationstagechanges；thevaluesofa0increaseasthedepthof

7、ore-bodyincreases；thevaluesofCoandthec0／a0ratioschangerhythmicallyasthedepthofore-bodyincreases．ResultsofcellparameterssuggestedthatpyriteshavehighcontentsofCo，NiandAs，andhavenotundergoneSdepletion．Moreover，A1andFearethemajorreplacementimpuritiesinisomorphismofquartz．Gol

8、d-bearingpyritesarecharacterizedbysmalla0，whilegold～bearingquartzarecharacterizedbybigao，smallCoandC0／a