岩矿测试
巖礦測試
암광측시
Rock and Mineral Analysis
2015年
5期
592-599
,共8页
王先广%刘战庆%刘善宝%王成辉%刘建光%万浩章%陈国华%张树德%刘小林
王先廣%劉戰慶%劉善寶%王成輝%劉建光%萬浩章%陳國華%張樹德%劉小林
왕선엄%류전경%류선보%왕성휘%류건광%만호장%진국화%장수덕%류소림
江西朱溪铜钨矿%花岗岩%岩石地球化学%LA-ICP-MS锆石U-Pb测年
江西硃溪銅鎢礦%花崗巖%巖石地毬化學%LA-ICP-MS鋯石U-Pb測年
강서주계동오광%화강암%암석지구화학%LA-ICP-MS고석U-Pb측년
Jiangxi Zhuxi W-Cu deposit%petrologic granite%geochemistry%LA-ICP-MS zircon U-Pb dating
江西朱溪铜钨矿床是近年来在赣北地区发现的又一超大型矽卡岩型钨矿，矿床的形成与花岗岩类侵入体密切相关，矿区处于钦—杭结合带江西段塔前—赋春成矿带中部。该矿床的发现进一步证明了研究区建立的“南钨北扩”格局，然而前人对其成矿岩浆岩地球化学特征及侵入时代缺少必要的研究，直接制约了对这一格局的深入认识。本文选择朱溪铜钨矿区与成矿有关的细粒白云母花岗岩作为研究对象，结合详细野外地质工作和前人研究成果，首次采用 LA -ICP -MS 锆石 U -Pb 定年方法获得了该岩体中锆石206 Pb/238 U加权平均年龄为146.90±0.97 Ma（ MSWD=0.55）；并利用X射线荧光光谱和ICP-MS技术进行岩石地球化学分析，结果显示该岩体具有高硅、高碱、富钾、强过铝质的地球化学特征，属于典型的S型花岗岩，说明晚侏罗世早期在江南隆起一带存在一期与成矿作用有关的岩浆侵位事件，为研究朱溪超大型铜钨矿和区域上塔前—赋春成矿带成矿规律研究提供了新证据。
江西硃溪銅鎢礦床是近年來在贛北地區髮現的又一超大型矽卡巖型鎢礦，礦床的形成與花崗巖類侵入體密切相關，礦區處于欽—杭結閤帶江西段塔前—賦春成礦帶中部。該礦床的髮現進一步證明瞭研究區建立的“南鎢北擴”格跼，然而前人對其成礦巖漿巖地毬化學特徵及侵入時代缺少必要的研究，直接製約瞭對這一格跼的深入認識。本文選擇硃溪銅鎢礦區與成礦有關的細粒白雲母花崗巖作為研究對象，結閤詳細野外地質工作和前人研究成果，首次採用 LA -ICP -MS 鋯石 U -Pb 定年方法穫得瞭該巖體中鋯石206 Pb/238 U加權平均年齡為146.90±0.97 Ma（ MSWD=0.55）；併利用X射線熒光光譜和ICP-MS技術進行巖石地毬化學分析，結果顯示該巖體具有高硅、高堿、富鉀、彊過鋁質的地毬化學特徵，屬于典型的S型花崗巖，說明晚侏囉世早期在江南隆起一帶存在一期與成礦作用有關的巖漿侵位事件，為研究硃溪超大型銅鎢礦和區域上塔前—賦春成礦帶成礦規律研究提供瞭新證據。
강서주계동오광상시근년래재공북지구발현적우일초대형석잡암형오광，광상적형성여화강암류침입체밀절상관，광구처우흠—항결합대강서단탑전—부춘성광대중부。해광상적발현진일보증명료연구구건립적“남오북확”격국，연이전인대기성광암장암지구화학특정급침입시대결소필요적연구，직접제약료대저일격국적심입인식。본문선택주계동오광구여성광유관적세립백운모화강암작위연구대상，결합상세야외지질공작화전인연구성과，수차채용 LA -ICP -MS 고석 U -Pb 정년방법획득료해암체중고석206 Pb/238 U가권평균년령위146.90±0.97 Ma（ MSWD=0.55）；병이용X사선형광광보화ICP-MS기술진행암석지구화학분석，결과현시해암체구유고규、고감、부갑、강과려질적지구화학특정，속우전형적S형화강암，설명만주라세조기재강남륭기일대존재일기여성광작용유관적암장침위사건，위연구주계초대형동오광화구역상탑전—부춘성광대성광규률연구제공료신증거。
Zhuxi W-Cu deposit in northern Jiangxi Province is a recently found super large skarn W deposit. The formation of this deposit is closely related to granitic intrusions. The mining area is located in the central Jiangxi Taqian-Fuchun ore belt in Qin( zhou)-Hang( zhou)joint zone. The discovery of this deposit is further evidence for the model of the Southern tungsten North expansion. However,due to the lack of systematic geochemistry and geochronology of ore-related intrusions,the knowledge of this model is limited. Ore-related fine-grained muscovite granite was chosen as the research object for the study reported on in this paper. LA-ICP-MS zircon U-Pb dating of granite yielded a 206 Pb/ 238 U weighted average age of 146 . 90 ± 0 . 97 Ma( MSWD=0 . 55 ). These granitic rocks have high silicon,alkali and potassium,and are strongly peraluminous,which belongs to the typical S-type granite. This study has indicated that ore-related magmatism occurred at the late Jurassic in Jiangnan uplift and provides new evidence for the genesis of Zhuxi W-Cu deposit and metallogenic regularity of the Taqian-Fuchun metallogenic belt.
