Geological characteristics and mineralization stage division of algal limestone facies stratified breccia in the Huayuan lead-zinc deposit
-
摘要:
湘西花垣MVT型铅锌矿的资源储量巨大，成矿前景好。研究区内层状藻灰岩相是主要预测方向，矿化角砾岩是进一步找矿的重要标志，但是如何判别层状角砾岩的含矿特征尚需深入研究。通过对花垣铅锌矿进行研究，探讨角砾岩成矿过程，分析不同成矿阶段角砾岩的地质特征，根据对角砾和胶结物的观测与分析，划分了不同矿化阶段的角砾岩。①成矿前角砾岩：该类角砾岩不含矿，其中角砾与胶结物均无矿化现象出现，以似层状和条纹状角砾岩为主要类型；②成矿期角砾岩：该类角砾中含矿，其中角砾与胶结物均出现明显的矿化现象，以网脉状含矿角砾岩、斑脉状含矿角砾岩、细脉状含矿角砾岩和侵染状含矿角砾岩为主要类型；③成矿后角砾岩：该类角砾岩含少量矿化，其中角砾多有矿化现象，而胶结物无矿化或较弱矿化，以不规则网脉状角砾岩为主。角砾岩矿化阶段的判别对于构造岩相地质找矿及成矿规律研究，具有重要的参考价值。
Abstract:There are huge reserves of MVT type lead-zinc deposits in west Hunan, and hence this area has good metallogenic prospect.Stratified algal limestone facies is the main prospect direction and the mineralized breccia is the key symbol for ore prospecting, but the method for distinguishing the characteristics of bedded breccia needs to be further studied.This paper mainly focuses on the study of lead-zinc deposit with the purpose of discussing the breccia mineralization process and analyzing the geological characteristics of breccia in different metallogenic stages.According to observation and analysis of breccia and cement, the breccia is divided into three different mineralization stages: ①Breccia formed prior to mineralization: this kind of breccia does not contain minerals, and there is no mineralization phenomenon in both breccia and cement.Stratoid breccia and striate breccia are the main types of this kind of breccia; ②Breccia of metallogenic stage: this kind of breccia contains mineralization in both breccia and cement.Stockwork ore-bearing breccia, porphyry veinlike ore-bearing breccia, veinlike ore-bearing breccia and disseminated ore-bearing breccia are the main types of this kind of breccia.③ Breccia of post- metallogenic: this kind of breccia contains a small amount of mineralization and most of mineralization phenomena exist in the breccia instead of in the cement.Irregular network veins breccia is the main type of this kind of breccia.The identification of the mineralization stage of breccia has important reference value for using tectonic and rock facies to study geological prospecting and regularity of mineralization.
-
-
[1] 杨绍祥, 劳可通.湘西北铅锌矿床的地质特征及找矿标志[J].地质通报, 2007, (7):899-908. http://dzhtb.cgs.cn/gbc/ch/reader/view_abstract.aspx?file_no=200707147&flag=1
[2] 罗卫, 尹展, 孔令, 等.花垣李梅铅锌矿集区地质特征及矿床成因探讨[J].地质调查与研究, 2009, 32(3):194-202. http://www.cnki.com.cn/Article/CJFDTotal-QHWJ200903011.htm
[3] 张长青, 于金杰, 毛景文, 等.密西西比型(MVT)铅锌矿床研究进展[J].矿床地质, 2009, 28(2):195-210. http://www.cqvip.com/Main/Detail.aspx?id=30214978
[4] Wei H T, Xiao K, Shao J, et al.Modeling-based mineral system approach to prospectivity mapping of stratabound hydrothermal deposits:A case study of MVT Pb-Zn deposits in the Huayuan area, northwestern Hunan Province, China[J].Ore Geology Reviews, 2020:103368.
[5] 薛长军, 吕古贤, 高伟利, 等.湘西花垣李梅矿田含矿层清虚洞期岩相古地理分析及成矿预测[J].地学前缘, 2017, 24(2):159-175. http://www.cqvip.com/QK/98600X/201702/671606053.html
[6] 高伟利, 吕古贤, 肖克炎, 等.湘西李梅铅锌矿区矿床地质特征与控矿要素[J].地质学刊, 2014, 38(3):374-379. http://www.cqvip.com/QK/96560A/201403/662650488.html
[7] 张达, 吴淦国, 狄永军, 等.武夷山西南缘构造应力场演化及其与成矿的关系[J].地质通报, 2011, 30(4):505-513. http://dzhtb.cgs.cn/gbc/ch/reader/view_abstract.aspx?file_no=20110406&flag=1
[8] 吴越, 张长青, 毛景文, 等.扬子板块西南缘与印支期造山事件有关的MVT型铅锌矿床[J].矿床地质, 2012, (S1):451-452. http://www.cnki.com.cn/Article/CJFDTotal-KCDZ2012S1228.htm
[9] 杨绍祥, 劳可通.湘西北铅锌矿床碳氢氧同位素特征及成矿环境分析[J].矿床地质, 2007, (3):330-340. http://d.wanfangdata.com.cn/periodical/kcdz200703010
[10] 曾建康, 张加利, 谭懿.湖南省花垣县大脑坡铅锌矿矿床地质特征及与岩相关系[J].国土资源导刊, 2018, 15(4):59-64. http://www.cqvip.com/QK/95938A/20184/7001025583.html
[11] 赵佳进, 许明珠, 刘建平, 等.湘西花垣铅锌矿田的成矿构造[J].地质找矿论丛, 2016, 31(3):346-354. http://www.cqvip.com/QK/95080X/201610/670535195.html
[12] 周云, 段其发, 陈毓川, 等.湘西花垣铅锌矿田成矿物质来源的C、O、H、S、Pb、Sr同位素制约[J].地质学报, 2016, 90(10):2786-2802. http://www.cqvip.com/QK/95080X/201610/670535195.html
[13] 曹亮, 段其发, 胡尚军, 等.湘西花垣铅锌矿田李梅矿区地质特征及闪锌矿中分散元素的富集规律[J].华南地质与矿产, 2017, 33(4):354-364. http://www.cnki.com.cn/Article/CJFDTotal-HNKC201704005.htm
[14] 吴越, 孔志岗, 陈懋弘, 等.扬子板块周缘MVT型铅锌矿床闪锌矿微量元素组成特征与指示意义:LA-ICPMS研究[J].岩石学报, 2019, 35(11):3443-3460. http://www.zhangqiaokeyan.com/academic-journal-cn_acta-petrologica-sinica_thesis/0201274917047.html
[15] 刘文均, 郑荣才.花垣铅锌矿床成矿流体特征及动态[J].矿床地质, 2000(02):173-181. http://d.wanfangdata.com.cn/Periodical/kcdz200002009
[16] Jébrak Michel.Hydrothermal breccias in vein-type ore deposits:A review of mechanisms, morphology and size distribution[J].Ore Geology Reviews, 1997, 12:111-134. http://www.sciencedirect.com/science/article/pii/S0169136897000097
[17] 劳可通, 张寿高.渔塘铅锌矿田"贫中找富"是如何取得重大突破的?[J].湖南地质, 1990, (1):81-84. http://www.cqvip.com/qk/95938X/199001/280267.html
-
下载:
图(10)
计量
- 文章访问数: 446
- PDF下载数: 5
- 施引文献: 0