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| Research on sedimentary tectonic metallogenic of Hongyanxi area in the northwest Hunan |
| LIANG Enyun1, LIU Wei1, 2, LIU Yaorong1, HUANG Leqing1, LIU Gengyin1, PENG Nengli1, CAO Jiehua1 |
1. Hunan Institute of Geological Survey, Changsha 410016, China;
2. School of Earth Sciences and Resources, China University of Geosciences, Beijing 100083, China |
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Abstract Hongyanxi area in the northwest of Hunan is on the south central of Xiangxi-Exi polymetallic metallogenic belt and it belongs to the southeast of upper Yangtze region. The major sedimentary formations are from Cambrian to Silurian and there are many Pb-Zn deposits along Hongyanxi fracture with northeast strike. These Pb-Zn deposits are in the limestone of Tongzi Formation and Honghuayuan Formation of Ordovician period. Firstly, this paper used stratum, rock and tectonic feature to characterize stratum, rock and tectonic feature about the Pb-Zn mine, found out the metallogenic geological background and qualification, and summarized the metallogenic law. This study also analyzed the forming mechanisms of the storm deposit in Tongzi Formation, bioherm limestone in Honghuayuan Formation, crazing construction in Baota Formation and turbidities of far source in Xintan Formation. So the model of Ordovician-Silurian sedimentary tectonic evolution was built, which was from passive continental margin (extensional system) to foreland basin (compressional system). Secondly, this paper investigates the connection between fracture and Pb-Zn deposits, and found out the faults strike to northeast and north-north-east are the ore-transmission structures, and those pointing to northwest are ore-hosting structures. Also the form of metallogenic environment of Pb-Zn deposit from aspect of fluid inclusion was discussed. The results show the mineralizing hydrothemal is similar to the hot brine in the basin, which is originally coming from interlayer and meteoric water. Finally, the Pb-Zn metallogenic model was built.
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Received: 25 December 2015
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[1] 陈富文,潘仲芳,魏道芳,等.湘西鄂西成矿带岩金矿床区域成矿规律[J].矿床地质,2010,29(S):911-912.
[2] 梁恩云,刘伟,彭能立,等.湘西北地区奥陶系铅锌矿化围岩的地球化学特征[J].桂林理工大学学报,2015,35(4):694-700.
[3] 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,2000,19(2):173-181.
[4] 鲍正襄,万榕江,包觉敏.湘西北菱锌矿床地质特征及形成机制[J].湖南冶金,2001(1):24-27.
[5] 芮宗瑶,叶锦华,张立生,等.扬子克拉通周边及其隆起边缘的铅锌矿床[J].中国地质,2004,31(4):337-346.
[6] 刘钟伟.湖南省大型矿床成矿大地构造背景——以湘西北湘南为例[J].国土资源导刊,2006,3(3):46-51.
[7] 付胜云,彭志刚,刘红梅.湘西北铅锌矿带成矿地质特征[J].国土资源导刊,2006,3(3):99-103.
[8] 付胜云.湘西铅锌矿富矿成矿规律探讨[J].有色金属(矿山部分),2011,63(6):27-35.
[9] 杨绍祥,余沛然,劳可通.湘西北地区铅锌矿床成矿规律及找矿方向[J].国土资源导刊,2006,3(3):92-98.
[10] 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,2007,26(3):330-340.
[11] 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,2007,26(7):899-908.
[12] 钟九思,毛昌明.湘西北密西西比河谷型铅锌矿床特征及成矿机制探讨[J].国土资源导刊,2007,4(6):52-56.
[13] 匡文龙,刘新华,陈年生,等.湘西北下光荣矿区铅锌矿床主要地球化学特征[J].地质科学,2008,43(4):685-694.
[14] 周厚祥,谢文安.湘西北地区第五个铅锌矿田雏议[J].国土资源导刊,2008,5(5):54-56.
[15] 雷义均,戴平云,段其发,等.鄂西-湘西北地区铅锌矿矿源层对铅锌矿床产出定位的制约[J].桂林理工大学学报,2013,33(1):1-6.
[16] 刘宝珺,许效松,潘杏南,等.中国南方古大陆沉积地壳演化与成矿[M].北京:科学出版社,1993:9-134.
[17] 周名魁,王汝植,李志明.中国南方奥陶-志留纪岩相古地理与成矿作用[M].北京:地质出版社,1993:20-55.
[18] 湖南省地质矿产局.湖南省区域地质志[M].北京:地质出版社,1988:523-618.
[19] 刘恩山,李三忠,金宠,等.雪峰陆内构造系统燕山期构造变形特征和动力学[J].海洋地质与第四纪地质,2010,30(5):63-74.
[20] 冯向阳,孟宪刚,邵兆刚,等.雪峰山陆内造山带变形特征及挤压推覆-伸展滑脱构造的物理模拟[J].地球学报,2001,22(5):419-424.
[21] 张进,马宗晋,杨健,等.雪峰山西麓中生代盆地属性及构造意义[J].地质学报,2010,84(5):631-650.
[22] 汪昌亮,颜丹平,张冰,等.雪峰山西部中生代厚皮逆冲推覆构造样式与变形特征研究[J].现代地质,2011,25(6):1021-1031.
[23] 戎嘉余,陈旭.华南晚奥陶世的动物群分异及生物相、岩相分布模式[J].古生物学报,1987,26(5):507-535.
[24] 王志浩,伯格斯特龙S M,莱恩H R.中国奥陶纪牙形刺分区和生物地层[J].古生物学报,1996,35(1):26-59.
[25] Rodder E,Bodnar R J.Geologic pressure determination from fluid inclusion studies[J].Ann.Rev.Earth Planet.Sci.,1980(8):263-301.
[26] 刘英超,侯增谦,杨竹森,等.密西西比河谷型(MVT)铅锌矿床:认识与进展[J].矿床地质,2008,27(2):253-264.
[27] 段其发,曹亮,曾健康,等.湘西花垣矿集区狮子山铅锌矿床闪锌矿Rb-Sr定年及地质意义[J].地球科学:中国地质大学学报,2014,39(8):977-986,999. |
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2016, Vol. 3 
