陕西省马鞍桥金矿床地质特征、同位素地球化学与矿床成因

《陕西省马鞍桥金矿床地质特征、同位素地球化学与矿床成因》由会员上传分享，免费在线阅读，更多相关内容在教育资源-天天文库。

1、1000旬569／2009／025(02)拼31硝3Ac￡o＆tro垤池S讥Jfc口岩石学报陕西省马鞍桥金矿床地质特征。同位素地球化学与矿床成因’朱赖民张国伟李彝郭波康磊吕拾零ZHULaiMin，ZHANGGuoWei，UBen，GUOBo，KANGkiandLVShiUng西北大学地质系，大陆动力学国家重点实验事，西安7l0069&啪研肠锄锄吖矿c口脚iM妇f劬mm如，觑即珈跏f矿岛幽∥，肌m删跏咖砂，尉’口n7l0069，劬讹2008一lO旬3收稿．2008-12—20改回．ZhuLM。Zh锄g

2、GW。“B。G帅B，KangL柚dLvSL20凹．GeoIo科，isotopegeocheIIlistry粕do代genesisofmeM啪qi帅90lddep傩it。Shan嫡Provinc己Ac纽№正Dg画m跏缸口，25(2)：43l一443Abst隗ct1nleM舱nqiaobrime-ductileshearzonesouthoftheShan—Daningolddep硎toccu瑁in明E-u琶ndingnan‘owIygeosuturethewestemQinlinorogen．0reb

3、odiesofthedepositaresp“allycontrolledbytheshearzoneandmostlyoccuratstmngly-defo丌rIedinpositions，hostedint11elow·掣丑demetamorphosedDevoniansediments．TheXian韶oumonzonitic孕anite—porphn7dykeoutcmppedtheM龃nqiaominingareaw鹊alteredaJld90ldmineralized，butisnoto

4、findustrialsigrIificance．Theleadisotoperatiosoft}Ieoresandalteredmcksaresimilar，butdifkrentfromthoseofthemo眦oniticthatore—forrningIeaddidnotXianggougmnite—po甲hyry，indicatingcomefbmthemon加niticgmnite—porphyry．Thecarbonandoxygeni80topiccharacteristicssho

5、wthatore-fluidsweremainlysoureedf而mmetamorphjcand／ordev01atilizationofthes讹taor／andsimiIarwhichcarbonaceousphylIiteorreworkinglitholo画escomprise删e．ne艿埽0and6Dvalues0ftheore—f0邢jngnujdsdecreasegraduaJJyf而me别y，throu曲maj玎to1atestages，suggestjnglhaltheore—f

6、omingnuid·systemevolvedf而mearlymetamorphicorfonnation—connaturaltolatemeteoncwater．TheMaanqiaogolddeposit，locatedin明intra·contiIlentalcollisionalorogenicbelt，isrelatedtotheintra-continentalcoⅢsjonalcharacterizedgeneticallyorogenesisbyduplicatedthmsts，c

7、ms瑚defo珊ationandmetamorphism，andintra-continentalsubduetionssinceI丑teIndosini卸e阻111egeoIo西caIfeatures卸dtheisotopiccompositionsoftheMaanqiaogolddepositaresimilartothoseoftIleYangshan矛antgolddeposiLHencetheMaanqiaogolddep∞itc帅begeneticallyattributedtothe

8、Carlin—likegoldcl晒sortot11etraJIsitionbenveenC别in-aIldorganic-t)甲es．wordsKeyM枷qiaogolddep08it；G∞lo舀c8lfeatur；e；Isotope孵hemistry；0regenesis；Qinlingor0星声n摘要马鞍桥金矿床产于西秦岭造山带商丹断裂带南缘的E-w向脆-韧性剪切带中，矿体定位受剪切带控制并集中于变形强烈的部位，赋矿围岩为泥盆系浅变质沉积建造。出露于矿区的香沟花