江南造山带东段北缘鄣公山地区成矿地质特征及成矿条件研究
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摘要
鄣公山地区属江南钨锑金锡多金属成矿带九岭-鄣公山钨锑金成矿亚带,对矿床(点)成矿地质特征、金属元素分布特征、地球化学特征、控矿条件研究显示:金和铜铅锌多金属矿化受溪口岩群和瑶里-江潭构造基性岩带控制,产于韧性变形带叠加的后期脆性构造破碎带中,并赋存于次级断裂和裂隙中;锑、钨、钼矿化与燕山期酸性岩浆热液活动关系密切,赋存于岩体中及内外接触带;金、钨、锡、铋为研究区优势成矿金属;鄣源基性岩和新元古界地层(包括溪口岩群和双桥山群),具壳幔混源特征,暗示壳幔相互作用参与利于成矿,中酸性脉岩类形成时代基本为晚侏罗-早白垩世,属燕山期中酸性侵入岩体同一岩浆演化晚期产物,基性脉岩具与晚白垩世玄武岩源岩浆特征和成因亲缘性,与陆壳引张构造背景密切相关;韧性变形带叠加的次级断裂系统形成的蚀变破碎带或挤压片理化带中的后期破碎带,及挤压破碎带两侧的张性破碎带是聚矿有利部位,区内以燕山期为主的成矿特点,有早期动热变质成矿与后期岩浆热液改造叠加成矿特征。
Zhanggong mountain area belongs to the Jiangnan W-Sb-Au-Sn polymetallicmetallogenic belt of Jiu ridge– Zhanggong mountain W-Sb-Au mineralization belt.Ore-forming geological characteristics,metal elements distribution characteristics,geological and geochemical characteristics,and ore-controlling geological conditions of ore deposit/point are researched and research results show:Au and Cu-Pb-Zn polymetallic mineralization controlled by Xikou rocks and Yaoli-Jiangtan tectonic rock zone mainly originated from the late brittle tectonic fracture zone of ductile deformation zone overlay,and occurrence in the secondary faults and fissures;Sb,W,Mo closely related to Yanshanianmagmatic hydrothermal activities,occurrence in rock mass and the inner and outer contact zone;Au,W,Sn,Bi as the study area advantage oreforming metal;Zhangyuansource rock and Neoproterozoic strata(including Xikou rocks and Shuangqiaoshan group)have the feature of crust-mantle mixed source,and indicate that crust-mantle interactions involved in mineralization;acidic vein rocks formed in the basic of late Jurassic and early cretaceous age,which are in the mid-term acidic intrusive rock mass,are the same of the late magmatic evolution;mafic vein rocks and late cretaceous basalt magma source characteristics and genesis of affinity,are closely related to the continental crustal extension and tectonic setting;the secondary fracture of ductile deformation zone overlay system formed by altered fracture zone and fracture zone in the late of extrusion stretch of the physical andchemical,and extrusion fracture zone on both sides of the tensile fracture zone are ore positions;the area is metallogenic characteristics of Yanshan period mainly,whose characteristics are early dynamic thermal metamorphic mineralization and late magmatic hydrothermal superimposed mineralization.
Zhanggong mountain area belongs to the Jiangnan W-Sb-Au-Sn polymetallicmetallogenic belt of Jiu ridge– Zhanggong mountain W-Sb-Au mineralization belt.Ore-forming geological characteristics,metal elements distribution characteristics,geological and geochemical characteristics,and ore-controlling geological conditions of ore deposit/point are researched and research results show:Au and Cu-Pb-Zn polymetallic mineralization controlled by Xikou rocks and Yaoli-Jiangtan tectonic rock zone mainly originated from the late brittle tectonic fracture zone of ductile deformation zone overlay,and occurrence in the secondary faults and fissures;Sb,W,Mo closely related to Yanshanianmagmatic hydrothermal activities,occurrence in rock mass and the inner and outer contact zone;Au,W,Sn,Bi as the study area advantage oreforming metal;Zhangyuansource rock and Neoproterozoic strata(including Xikou rocks and Shuangqiaoshan group)have the feature of crust-mantle mixed source,and indicate that crust-mantle interactions involved in mineralization;acidic vein rocks formed in the basic of late Jurassic and early cretaceous age,which are in the mid-term acidic intrusive rock mass,are the same of the late magmatic evolution;mafic vein rocks and late cretaceous basalt magma source characteristics and genesis of affinity,are closely related to the continental crustal extension and tectonic setting;the secondary fracture of ductile deformation zone overlay system formed by altered fracture zone and fracture zone in the late of extrusion stretch of the physical andchemical,and extrusion fracture zone on both sides of the tensile fracture zone are ore positions;the area is metallogenic characteristics of Yanshan period mainly,whose characteristics are early dynamic thermal metamorphic mineralization and late magmatic hydrothermal superimposed mineralization.
引文
[1]张彦杰,廖圣兵,周效华,等.江南造山带北缘鄣源构造带主要地质特征[J].地质学报,2012,18(12):1905-1916.
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[13]陈冲,魏俊浩,付乐兵.韧性剪切带型金矿床地质特征研究——以辽宁排山楼金矿床与广东河台金矿床为例[J].黄金,2013,21(10):12-16.
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[17]张彦杰,周效华,廖圣兵,等.皖赣鄣公山地区新元古代地壳组成及造山过程[J].地质学报,2010,16(10):1401-1427.
[18]张彦杰,周效华,廖圣兵,等.江南造山带北缘鄣源基性岩地质-地球化学特征及成因机制[J].高校地质学报,2011,17(3):393-405.
[19]袁峰,周涛发,范裕,等.江南隆起带皖赣相邻区燕山期岩浆岩Nd-Sr同位素特征[J].地质科学,2006,19(1):133-142.
[20]王毅泽,邓明国.云南芦子园铅锌矿区隐伏岩体综合推断研究[J].河南科学,2013,31(3):353-356.
[21]吴志春,郭福生,谢财富,等.江西省相山铀多金属矿田重磁坡度异常提取与成矿预测[J].物探与化探,2013,37(3):453-460.
[22]伏雄.河南省水洞岭铜铅锌矿床地质特征、成因探讨及找矿方向[J].河南科学,2013,31(5):643-651.
[2]薛怀民,马芳,宋永勤,等.江南造山带东段新元古代花岗岩组合的年代学和地球化学:对扬子与华夏地块拼合时间与过程的约束[J].岩石学报,2010,26(11):3215-3244.
[3]周涛发,袁峰,侯明金,等.江南隆起带东段皖赣相邻区的成矿条件与资源潜力对比研究[J].自然科学进展,2003,13(10):1036-1041.
[4]张彦杰,周效华,廖圣兵,等.江南造山带北缘鄣源基性岩地质-地球化学特征及成因机制[J].高校地质学报,2011,17(3):393-405.
[5]程光华,汪应庚.江南东段构造格架[J].安徽地质,2000,10(1):1-8.
[6]余心起,江来利,许卫,等.皖浙赣断裂带的界定及其基本特征[J].地学前缘,2007,14(3):102-113.
[7]郑光文,侯明金,蔡连友,等.休宁县大丘田地区金矿成矿地质条件和找矿前景[J].安徽地质,2008,18(2):95-100.
[8]李斌,吕经美,汪明辉.休宁县里广山地区化探异常及找矿潜力分析[J].价值工程,2014,15(2):321-323,324.
[9]张家菁,梅玉萍,王登红,等.赣北香炉山白钨矿床的同位素年代学研究及其地质意义[J].地质学报,2008,82(7):927-931.
[10]陈子微,余心起,周翔,等.皖南休宁县里东坑似斑状花岗闪长岩成岩成矿特征分析[J].中国地质,2013,40(6):1762-1776.
[11]何绍勋,段嘉瑞,刘继顺,等.韧性剪切带与成矿[M].北京:地质出版社,1996.
[12]黄诚,张德会,和成忠,等.热液金矿床围岩蚀变特征及其与金矿化的关系[J].物探与化探,2014,38(2):278-283.
[13]陈冲,魏俊浩,付乐兵.韧性剪切带型金矿床地质特征研究——以辽宁排山楼金矿床与广东河台金矿床为例[J].黄金,2013,21(10):12-16.
[14]刘连登,姚风良.中国的金矿与韧性剪切带[J].黄金科技动态,1991,10(3):7-12.
[15]鄢明才,迟清华.中国东部地壳与岩石的化学组成[M].北京:科学出版社,1997.
[16]周涛发,袁峰,侯明金,等.江南隆起带东段皖赣相邻区的成矿条件与资源潜力对比研究[J].自然科学进展,2003,17(10):30-35.
[17]张彦杰,周效华,廖圣兵,等.皖赣鄣公山地区新元古代地壳组成及造山过程[J].地质学报,2010,16(10):1401-1427.
[18]张彦杰,周效华,廖圣兵,等.江南造山带北缘鄣源基性岩地质-地球化学特征及成因机制[J].高校地质学报,2011,17(3):393-405.
[19]袁峰,周涛发,范裕,等.江南隆起带皖赣相邻区燕山期岩浆岩Nd-Sr同位素特征[J].地质科学,2006,19(1):133-142.
[20]王毅泽,邓明国.云南芦子园铅锌矿区隐伏岩体综合推断研究[J].河南科学,2013,31(3):353-356.
[21]吴志春,郭福生,谢财富,等.江西省相山铀多金属矿田重磁坡度异常提取与成矿预测[J].物探与化探,2013,37(3):453-460.
[22]伏雄.河南省水洞岭铜铅锌矿床地质特征、成因探讨及找矿方向[J].河南科学,2013,31(5):643-651.