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海南省后万岭铅锌矿床控矿因素、矿床成因及成矿模式探讨
A tentative discussion on ore-controlling factors,ore genesis and metallogenic model of Houwanling Pb-Zn deposit in Hainan Province

查看参考文献36篇

付王伟 1   许德如 1 *   傅杨荣 2   杨昌松 2   周迎春 2   杨东生 1   吴传军 1   王智琳 1  
文摘 后万岭铅锌矿床是近年来海南省找矿的一项重要进展,探明的铅锌金属量大于29万吨(Pb 4.4万吨,Zn 24.6万吨),平均品位为锌2.23%、铅0.95%。该矿床产于千家超单元岩体内,后者是中-晚侏罗世在后造山期地壳大面积伸展减薄的构造背景下,由壳-幔混源岩浆间歇性多期侵入的产物。千家岩体各单元花岗岩属于壳-幔混合型的高钾钙碱性岩石或钾玄岩,具有明显的成分及结构演化的连续性。其稀土元素总量较高,但变化范围较大〔ΣREE=(122.61~410.58)×10~(-6)〕,具有显著至中等的负铕异常(δEu=0.13~0.69),其稀土元素配分曲线呈右倾型(LREE/HREE=6.74~16.32),并强烈亏损Ba、Nb、Ta、Sr、P、Ti,相对富集Rb、K、Pb等。千家岩体花岗质岩浆演化过程中存在大量的热液流体,同时,其造岩矿物中Pb、Zn的含量远高于地壳丰度值,深部热能及浅部放射性生热元素的高含量促使浅部热液对流循环,在较长时间内不断萃取成矿物质,有利于在断裂带内富集成矿。后万岭铅锌矿床严格受到千家岩体及发育于其内的NNW向-近SN向扭张性断裂的控制,矿体以充填、交代的方式就位于NNW向-近SN向扭张性断裂带内及附近。矿相学分析和矿区地质资料揭示出该矿床至少经历了4期热液成矿作用:①成矿早期,为粗粒黄铁矿形成阶段;②成矿中期,是闪锌矿主要成矿阶段;③成矿中-后期,是黄铜矿主要形成阶段;④成矿后期,是方铅矿主要成矿阶段,其成矿热液可能受到斑岩岩浆的控制。矿区内的NNW向-近SN向断裂活动过程对应了后万岭铅锌矿的成矿过程,成矿早期与成矿中期归入左旋张扭性断裂活动阶段,成矿中-后期和成矿后期归入右旋压扭性断裂活动阶段。据此笔者认为,后万岭铅锌矿属于燕山晚期后造山环境下严格受NNW向-近SN向扭张性断裂约束的热液脉型矿床,就位于千家岩体斑岩成矿系统的顶端或远端,最终归纳总结出了后万岭铅锌矿床成矿模式图。
其他语种文摘 The discovery of the Houwanling Pb-Zn deposit in Ledong County of Hainan Province has been a very im-portant achievement in ore exploration of Hainan Province in recent years. The Houwanling deposit contains proved Pb + Zn metal reserves of 290 thousand tons with average grades of Zn 2.23 % and Pb 0.95 %. The deposit is hosted by the Cretaceous Qianjia pluton which had a crust mantle mixed origin due to intermittent mag-matic intrusion and was produced in a post-collisional extensional environment in middle-late Jurassic period. This calc-alkaline-dominated pluton, which is extremely depleted in Ba, Nb, Ta, Sr, P and Ti and relatively enriched in Rb, K and Pb, shows a shift from high-K to shoshonite association and is characterized by obvious succession in composition and structure. The Qianjia pluton comprises the monzogranite-granodiorite-syenogran-ite association and is geochemically characterized by high REE content (ranging from 122 x 10"6 to 411 X 10~(-6)), moderate to high negative Eu anomalies (δEu = 0.13~0.69) and relatively high LREE/HREE ratios (6.74~16.32). There existed lots of hydrothermal fluids during the evolution of granitic magmas. Furthermore, the abundances of Pb and Zn in rock-forming minerals of the Qianjia pluton' s granites are much higher than those in the earth's crust. Deep heat and high content of radioactive heat-producing elements (such as K, Rb) in the shallow part caused convective circulation of hydrothermal fluids in the shallow part, which continuously extracted metallogenic material in a fairly long time. At last, sphalerite and galena were deposited. The deposit is strictly controlled by both the Qianjia pluton and the NNW-nearly SN trending transtensional faults, whereas the ore bodies are largely hosted in the NNW-nearly SN transtensional fault zones or distributed adjacent to the fault zones. Based on thin section observation, the authors obtained abundant important information: course-grained pyrite and fractured pyrite were filled with chalcopyrite, indicating that some of the course-grained pyrite underwent faulting activities, and course-grained pyrite was generated earlier than chalcopyrite with mesh texture at a temperature of 300~ 400oC; skeletal texture resulted from replacement of course-grained pyrite by sphalerite, indicating that sphalerite was generated after course-grained pyrite; corona texture resulted from replacement of chalcopyrite by covellite, indicating that covellite was generated in the shallow part at a low temperature below 300oC; emulsion texture and grating texture resulted from the separation of chalcopyrite from sphalerite, indicating that chalcopyrite - sphalerite solid solution had a initial temperature of about 550oC. Geological data reveal that the Houwanling Pb-Zn ore deposit probably underwent multistage mineralization and experienced at least more than four main stages of hydrothermal mineralization: ① the generation of course-grained pyrite at early stage of mineralization; ② the deposition of sphalerite mainly at the middle stage of mineralization; ③ the formation of chalcopyrite mainly at the middle or late stage of mineralization; ? the generation of galena mainly at the late stage of mineralization. The ore-forming fluid might have been released from fractionating porphyry magma. The authors thus consider that the Houwanling Pb-Zn deposit is a hydrothermal vein-type deposit in peripheral or supergene location of the porphyry system, strictly controlled by NNW-nearly SN transtensional faults and formed in an extensional environment of post-collision in late Cretaceous. On such a basis, a metallogenic model to explain ore genesis of the Houwanling Pb-Zn ore deposit is put forward in this paper.
来源 矿床地质 ,2012,31(6):1211-1226 【核心库】
关键词 地质学 ; 地球化学 ; 控矿因素 ; 热液脉型矿床 ; 后万岭铅锌矿 ; 千家超单元岩体 ; 海南省
地址

1. 中国科学院广州地球化学研究所, 中国科学院矿物学与成矿学重点实验室, 广东, 广州, 510640  

2. 海南省地质综合勘查院, 海南, 海口, 570260

语种 中文
ISSN 0258-7106
学科 地质学
基金 海南省资源潜力评价项目
文献收藏号 CSCD:4729646

参考文献 共 36 共2页

1.  陈沐龙. 海南岛白垩纪千家岩体岩石地球化学特征及其成矿作用分析. 矿产与地质,2008,22(1):36-42 被引 7    
2.  陈正海. 闪锌矿-黄铜矿密切交生体的实验研究和成因判别. 中南矿冶学院学报,1990,21(6):567-571 被引 4    
3.  郭峰. 湘南道县中生代辉长岩包体的Sm-Nd定年和岩石成因. 科学通报,1997,42(17):1661-1663 被引 12    
4.  郭令智. 西太平洋中、新生代活动大陆边缘和岛弧构造的形成及演化. 地质学报,1983,57(1):11-21 被引 156    
5.  寇大明. 热硫化条件下温度对黄铁矿结晶生长的影响. 吉林大学学报(地球科学版),2010(1):104-108 被引 7    
6.  丁式江. 海南抱伦金矿地质特征及其成矿作用. 中国地质,2001,28(5):28-34 被引 16    
7.  李孙雄. 海南千家地区主要断裂带特征和控岩控矿作用分析. 地质力学学报,2004,10(2):137-145 被引 2    
8.  黎彤. 化学元素的地球丰度. 地球化学,1976(3):168-174 被引 5    
9.  毛景文. 华南地区中生代大规模成矿作用与岩石圈多阶段伸展. 地学前缘,2004,11(1):45-55 被引 369    
10.  毛景文. 南岭地区大规模钨锡多金属成矿作用: 成矿时限及地球动力学背景. 岩石学报,2007,23(10):2329-2338 被引 345    
11.  唐立梅. 海南岛中生代两期构造伸展作用的岩浆记录及其大陆动力学意义(博士论文),2010:104页 被引 1    
12.  汪洋. 广西南部三叠纪强过铝质火成岩岩石化学特征的动力学意义. 地质地球化学,2003,31(4):35-41 被引 10    
13.  谢才富. 海南岛晚二叠世一中三叠世镁铁质-超镁铁质侵入岩:后碰撞阶段岩石圈减薄的证据. 2004年全国岩石学与地球动力学研讨会论文摘要集.2004年全国岩石学与地球动力学研讨会,2004:308-309 被引 1    
14.  谢才富. 三亚石榴霓辉石正长岩的锆石SHRIMP U-Pb年龄:对海南岛海西-印支期构造演化的制约. 高校地质学报,2005,11(1):47-57 被引 51    
15.  谢才富. 海南尖峰岭花岗岩体的形成时代、成因及其与抱伦金矿的关系. 岩石学报,2006,22(10):2493-2508 被引 43    
16.  吴福元. 花岗岩成因研究的若干问题. 岩石学报,2007,23(6):1217-1238 被引 800    
17.  许德如. 海南抱伦金矿床主要研究进展与关键科学问题研究. 矿物学报,2011,S1(增刊):984-985 被引 1    
18.  云平. 海南岛晚中生代壳幔岩浆混合作用-来自闪长质淬冷包体的证据. 华南地质与矿产,2003(2):30-35 被引 9    
19.  云平. 海南岛燕山晚期典型侵入岩成因矿物学研究及其地质意义. 华南地质与矿产,2004(4):1-8 被引 4    
20.  周新民. 对华南花岗岩研究的若干思考. 高校地质学报,2003,9(4):556-565 被引 271    
引证文献 4

1 付王伟 海南省高通岭钼矿床赋矿岩体LA-ICP-MS锆石U-Pb定年及成矿意义 矿床地质,2014,33(2):419-427
被引 9

2 陈沐龙 海南岛千家复式岩体锆石U-Pb年代学及其地质意义 地质科技情报,2014,33(6):1-10,27
被引 4

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论文科学数据集

1. 乌拉斯沟铜矿床S-Pb-Sr-Nd-C-H-O数据

2. 大别造山带北缘北淮阳带白垩纪含矿花岗岩的成因数据库

3. 紫金山矿田罗卜岭斑岩铜钼矿的锆石、磷灰石地球化学数据

数据来源:
国家青藏高原科学数据中心
PlumX Metrics
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