摘要
Macro-microscopictectonicanalysisandlithologicfeaturesshowthatthegold-bearingbrecciabodiesintheShuangwanggolddeposit,forhydrofracturingofthedeep-sourcedandalkali-richfluidsintheDevoniansodicrockseries,areidentifiedashydrofracturingbrecciabodies.SincetheIndosinian,intracontinentalcollisionalorogenesisresultsinmultiplefracturingsandmagmaticemplacementsintheQinlingarea.Deep-sourcedfluidsresultingfromdeepfracturesandgranitoidmagmaticintrusionareofasupercriticalnature.Jointactionbetweenthefluid-rocksystemandstructuresleadstohydroffacturingandoreformationofthegolddeposit.Firstly,theprogressivecoaxialcompressioncausedthecompetentsodicrockseriesandtheincompetentpeliticrockseriestobedeformedandpartitioned.Lens-likeweak-straindomainsarehenceformedanddistributedattheapproximateequidistancezonesandthelinearstrong-strainzones,respectively.Subsequently,theprogressivenon-coaxialshearingandright-lateralandhigh-angleobliquethrustingleadtothemostdevelopedfracturesysteminthecoreoftheweak-straindomaintoturnfromcompressiontoextensionandtolinkupwiththedeepfracturesystems.Theperiodicalhugepressuredeclineinthepumpingcentercausesthedeep-sourcedconfinedfluidstodevelopperiodictectonicpumping,hydrofracturingandprecipitation-healinginthesodicrockseries.Thegold-bearinghydrofracturingbrecciabodiesarehenceultimatelyformedatnear-equidistancetectoniclenses.Onthebasisoftheabovemodel,thepredictedconcealedgold-bearinghydrofracturingbrecciabodieshavebeenpreliminarilyvalidatedbylatestdrillings.
出版日期
2005年02月12日（中国期刊网平台首次上网日期，不代表论文的发表时间）
