华南地质与矿产
華南地質與礦產
화남지질여광산
GEOLOGY AND MINERAL RESOURCES OF SOUTH CHINA
2012年
4期
315-320
,共6页
程顺波%付建明%马丽艳%陈希清%芦友冠%赵武强
程順波%付建明%馬麗豔%陳希清%蘆友冠%趙武彊
정순파%부건명%마려염%진희청%호우관%조무강
SHRIMP锆石u—Pb测年%花岗闪长岩%佛子冲铅锌矿%广西
SHRIMP鋯石u—Pb測年%花崗閃長巖%彿子遲鉛鋅礦%廣西
SHRIMP고석u—Pb측년%화강섬장암%불자충연자광%엄서
SHRIMP zircon U-Pb dating%granodoirite%Fozichong deposit,Guangxi province
本文对佛子冲铅锌矿床北部早前认为的成矿花岗岩——大冲岩体进行了年代学研究,获得花岗闪长岩锆石SHRIMPU—Pb年龄为258.2±3.2Ma(95%置信度,MSWD=0.59),证明大冲岩体形成时代不是原来认为的燕山早期,而是属于海西期。同时结合区域上海西期岩体不成矿的认识和矿床地质特征,本文认为成矿岩体不是大冲岩体,而是燕山期花岗斑岩群,它们和铅锌矿化一起明显受到牛卫断层系统控制。
本文對彿子遲鉛鋅礦床北部早前認為的成礦花崗巖——大遲巖體進行瞭年代學研究,穫得花崗閃長巖鋯石SHRIMPU—Pb年齡為258.2±3.2Ma(95%置信度,MSWD=0.59),證明大遲巖體形成時代不是原來認為的燕山早期,而是屬于海西期。同時結閤區域上海西期巖體不成礦的認識和礦床地質特徵,本文認為成礦巖體不是大遲巖體,而是燕山期花崗斑巖群,它們和鉛鋅礦化一起明顯受到牛衛斷層繫統控製。
본문대불자충연자광상북부조전인위적성광화강암——대충암체진행료년대학연구,획득화강섬장암고석SHRIMPU—Pb년령위258.2±3.2Ma(95%치신도,MSWD=0.59),증명대충암체형성시대불시원래인위적연산조기,이시속우해서기。동시결합구역상해서기암체불성광적인식화광상지질특정,본문인위성광암체불시대충암체,이시연산기화강반암군,타문화연자광화일기명현수도우위단층계통공제。
Zircon SHRIMP U-Pb dating of Dachong granodoirite in Fozichong deposit, Guangxi province, is conducted in this paper, yielding an age of 258.2± 3.2 Ma (95% confidence, MSWD=0.59). The result shows Daehong stock intruded at shallow place in Hecynian, not late Yanshanian constrainted by former researchers. Compiled with regional metallogenic rule of "no Hecynian mineralization" and geological characteristics of this deposit, we support metallogenic granite is not Dachong granodoiritic stock, but Yanshanian granitic porphyry dike swarm. The Yanshanian granitic porphyry together with Pb, Zn mineralization, were obvious controlled by Niuwei fault system.