Study on the prospecting model of concealed MVT lead-zinc deposits in northeastern Yunnan Province: A case study of Maozu lead-zinc deposit
-
摘要:
滇东北地区是我国MVT型铅锌矿床的重要集中产出地之一，区内浅表资源经长时间开采而逐渐枯竭，亟需在已知矿床的外围及深部寻找到新的接替资源。本文以区内典型的巧家县茂租铅锌矿床为例，通过在矿区已知矿床点开展综合找矿方法试验，并结合前人对本区地质背景、成矿模式、矿床特征、找矿标志等的认识，对本区MVT型铅锌矿床深部找矿的勘查模式进行了研究。研究表明，岩石地球化学测量中沿断层破碎带浓集的Pb-Zn-Ag元素高值异常指示了其深部具备成矿热液活动“痕迹”，音频大地电磁法能够查明地下深部有利赋矿层位（震旦系灯影组和寒武系筇竹寺组）的顶底界面埋深和导（控）矿断层的倾向、规模等地质成矿“格架”背景，面积性激电中梯测量能够在“横向平面尺度”圈定出有利的找矿靶区（高极化异常区），大比例尺激电测深剖面能够在“纵向空间尺度”定位矿（床）体位置（低电阻率、高极化异常体），通过深浅结合的组合勘查技术方法（浅表化探组合元素异常+电阻率剖面深部地质结构+平、剖面激电异常体），可以从多学科交叉的角度为深部找矿靶区优选提供证据支撑。据此，本文提出了“构造地球化学+多维度电法勘探”的勘查模式，此模式有望推广到滇东北铅锌成矿带内的其他铅锌矿区进行找矿示范应用。
Abstract:Northeast Yunnan Province is one of the most important production areas of MVT lead-zinc deposits in China. In recent years, with the gradual depletion of resources in shallow mining areas, it is urgent to find new replacement resources in the peripheral and deep parts of mining areas. Taking the typical MVT Maozu lead-zinc deposit in Qiaojia county as an example, this paper puts forward a prospecting model suitable for deep exploration of MVT lead-zinc deposits in this area. This prospecting model is based on comprehensive exploration methods tests of known deposits around the mining area and detailed study of the geological background, metallogenic model, deposit characteristics, and prospecting indicators of MVT deposits in this area. The experimental data show that the high-value Pb-Zn-Ag anomalies concentrated along the fault fracture zone in the geochemical survey indicate that there are signatures of ore-forming hydrothermal activity in the deep parts of the faults. The audio frequency magnetotelluric method can be used to identify the burial depth of concealed orebodies, the fluctuations in favorable ore-forming interfaces between the Ediacaran Dengying Formation and the Cambrian Qiongzhusi Formation in the deep underground, and the tendency and scale of the ore-forming faults. The intermediate gradient IP (Induced Polarization Method) measurement of an area can delineate the favorable prospecting area (high polarization anomaly area) on the “horizontal plane scale”, and large-scale IP sounding profiles can further delineate the favorable ore body target areas that are of low resistivity and high polarization anomaly on the “vertical space scale”. The research results show that the combined use of the shallow and deep exploration technologies described in this paper, including the combined element anomalies of shallow geochemical exploration, the deep geological structure of the resistivity profile, and the IP anomaly bodies of the plane and profile, can provide interdisciplinary evidence support for optimizing the deep prospecting target area in this area, and the turning points of anticline and syncline folds close to ore-guiding (controlling) faults and the stratigraphic interface of the Dengying Formation and the Qiongzhusi Formation are preferred drilling verification locations.
-
Key words:
- Northeast Yunnan /
- MVT-type /
- lead zinc deposit /
- Maozu mining area /
- deep prospecting method /
- prospecting target
-
-
图 3 茂租矿区铅锌典型矿床特征（据贺胜辉等, 2006编绘）
Figure 3.
图 2 茂租铅锌矿区地质构造简图（据金灿海等, 2015编绘）
Figure 2.
表 1 研究区主要岩（矿）石地层的电性参数统计表
Table 1. Statistical data of electrical parameters of the main rock (ore) strata in the study area
地层名称 地层
代号厚度
(m)岩性 极化率(%) 电阻率(Ω·m) 电性特征分类 均值 变化范围 均值 变化范围 寒武系上统二道水组 ∈3e 154~296 白云岩 0.7 0.37~1.77 965 586~ 2964 高电阻率、低极化率 寒武系中统西王庙组 ∈2x 150~298 白云岩 0.6 0.27~1.07 1512 1622 ~3469 寒武系中统陡坡寺组 ∈2d 32 白云岩 1.1 1.1 1947 1947 页岩、粉砂岩 0.6 0.12~1.35 372 325~425 中高电阻率、低极化率 寒武系下统龙王庙组 ∈1l ＞300 泥质页岩 0.2 0~0.47 193 45~385 白云岩 0.5 0.12~1.95 1426 819~ 2345 寒武系下统沧浪铺组 ∈1c 140~179 砂页岩 0.2 0~0.35 261 111~735 低电阻率、低极化率 寒武系下统筇竹寺组 ∈1q 150~260 页岩 1.2 0.25~8.35 87 19~223 泥质粉砂岩 0.4 0~1.19 353 114~967 含黄铁矿砂页岩 14.05 14.05 217 217 低电阻率、高极化率 震旦系上统灯影组上段 Z2d2 ＞500 方铅矿石 7.8 2.9~18.2 9.7 3~20 闪锌矿石 12 8.5~15.7 1070.6 165~ 2954 铅锌硫化矿 15 9.4~40 148.4 51~481 裂隙矿 1.2 0.59~2.63 545 254~824 白云岩 0.55 0~1.51 1841 1088 ~2695 高电阻率、低极化率 震旦系上统灯影组下段 Z2d1 323~663 角砾岩 1.12 0.87~1.54 1533 1277 ~1850 
下载: 导出CSV
-
[1] 陈启良, 2017. 云南昭通地区铅锌（银）矿找矿进展及典型矿床对比研究[J]. 有色金属（矿山部分）, 69（6）: 39 − 46
Chen Q L, 2017. Review of prospecting advance: comparative study on several typical Pb−Zn（Ag）Deposits in Zhaotong, Yunnan Province. Nonferrous Metals（Mining section）, 69（6）: 39 − 46（in Chinese with English abstract）.
[2] 高航校, 任小华, 郭健, 等, 2011. 茂租铅锌矿床地质—地球物理特征及矿体预测研究[J]. 矿产与地质, 25（2）: 152-157 doi: 10.3969/j.issn.1001-5663.2011.02.013
Gao H X, Ren X H, Guo J, et al. , 2011. Geological geophysical characteristics and orebody prediction of Maozu lead zinc deposit[J]. Mineral Resources and Geology, 25（2）: 152-157（in Chinese with English abstract）. doi: 10.3969/j.issn.1001-5663.2011.02.013
[3] 高林志, 张恒, 张传恒, 等, 2018. 滇东昆阳群地层序列的厘定及其在中国地层表的位置[J]. 地质论评, 64（2）: 283-298 doi: 10.16509/j.georeview.2018.02.002
Gao L Z, Zhang H, Zhang C H, et al. , 2018. Collate and Stipulate the Sequences of the Mesoproterozoic Kunyang Group in Eastern Yunnan and Its position in Stratigraphic Column of China[J]. Geological Review, 64（2）: 283-298（in Chinese with English abstract）. doi: 10.16509/j.georeview.2018.02.002
[4] 韩润生, 胡煜昭, 王学琨, 等, 2012. 滇东北富锗银铅锌多金属矿集区矿床模型[J]. 地质学报, 86（2）: 280 − 294
Han R S, Hu Y Z, Wang X K, et al., 2012. Mineralization model of rich Ge−Ag−Bearing Zn−Pb polymetallic deposit concentrated district in Northeastern Yunnan, China. Acta Geologica Sinica, 86（2）: 280 − 294（in Chinese with English abstract）.
[5] 韩润生, 邹海俊, 刘鸿, 2007. 构造地球化学, 勘查地球化学—滇东北铅锌银矿床成矿规律及构造地球化学找矿[J]. 云南地质, 25: 382-384
Han R S, Zou H J, Liu H, 2007. Tectonogeochemistry, exploration geochemistry - metallogenic regularity and tectonogeochemical prospecting of lead zinc silver deposits in Northeast Yunnan [J]. Geology of Yunnan, 25: 382-384（in Chinese with English abstract）.
[6] 贺胜辉, 荣惠锋, 尚卫, 等, 2006. 云南茂租铅−锌矿床地质特征及成因研究[J]. 矿产与地质, 20（4−5）: 397 − 402
He S H, Rong H F, Shang W, et al., 2006. Geological characterisites and genesis of Maozu lead and zinc deposit, Yunnan, Mineral Resources and Geology, 20（4−5）: 397 − 402（in Chinese with English abstract）.
[7] 金灿海, 蒋诗鹏, 祁传林, 等, 2015. 滇东北茂租铅锌矿控矿因素及找矿方向[J]. 矿产与地质, 29（1）: 1-6 doi: 10.3969/j.issn.1001-5663.2015.01.001
Jin C H, Jiang S P, Qi C L, et al. , 2015. Ore-controlling factors and prospecting direction of Maozu Pb-Zn deposit of northeast Yunnan[J]. Mineral Deposits, Mineral Resources and Geology, 29（1）: 1-6（in Chinese with English abstract）. doi: 10.3969/j.issn.1001-5663.2015.01.001
[8] 孔志岗, 吴越, 张锋, 等, 2018. 川滇黔地区典型铅锌矿床成矿物质来源分析: 来自S-Pb同位素证据[J]. 地学前缘, 25（1）: 125-137
Kong Z G, Wu Y, Zhang F, et al. , 2018. Sources of ore-forming material of typical Pb-Zn deposits in the Sichuan- Yunnan-Guizhou metallogenic province: constraints from the S-Pb isotopic compositions[J]. Earth Science Frontiers, 25（1）: 125-137（in Chinese with English abstract）.
[9] 李小清, 2013. 滇东北巧家白马厂铅锌矿床地质—地球化学特征及成因研究[D]. 昆明: 昆明理工大学.
Li X Q, 2013. Research on geological - geochemical characteristics and Genesis of the Qiaojia Baimachang Lead Zinc Deposit in Northeast Yunnan Province[D]. Kunming: Kunming University of Science and Technology（in Chinese）.
[10] 廖国忠, 张伟, 杨剑, 等, 2020. 湘西花垣地区铅锌矿勘查技术找矿模式探索——以大脑坡铅锌矿为例[J]. 沉积与特提斯地质, 40（4）: 103-110 doi: 10.19826/j.cnki.1009-3850.2020.08004
Liao G Z, Zhang W, Yang J, et al. , 2020. A prospecting model for Pb-Zn deposits in Western Hunan Province[J]. Sedimentary Geology and Tethyan Geology, 40（4）: 103-110（in Chinese with English abstract）. doi: 10.19826/j.cnki.1009-3850.2020.08004
[11] 刘洪滔, 张映旭, 2013. 化探渗滤异常找矿方法探讨—以云南巧家茂租铅锌矿区为例[J]. 矿产与地质, 27（5）: 403 − 408
Liu H T, Zhang Y X, 2013. Study on leakage anomalies techniques of geochemical prospecting—Giving an example of Maozu Pb−Zn mining district, Qiaojia, Yunnan. Mineral Resources and Geology, 27（5）: 403 − 408（in Chinese with English abstract）.
[12] 刘文周, 2009. 云南茂租铅锌矿矿床地质地球化学特征及成矿机制分析[J]. 成都理工大学学报（自然科学版）, 36（5）: 480 − 486
Liu W Z, 2009. Geological and geochemical characteristics and metallogenic mechanism analysis of the Pb Zn deposit in Maozu, Yunnan, China. Journal of chengdu university of technology（science & technology edition）, 36（5）: 480 − 486（in Chinese with English abstract）.
[13] 刘英超, 侯增谦, 杨竹森, 等, 2008. 密西西比河谷型（MVT）铅锌矿床: 认识与进展[J]. 矿床地质, 27（2）: 253 − 264.
Liu Y C, Hou Z W, Yang Z S, et al., 2008. Some insights and advances in study of Mississippi Valley-type（MVT）lead-zinc deposits[J]. Mineral Deposits, 27（2）: 253 − 264（in Chinese with English abstract）.
[14] 明添学, 唐忠, 包从法, 等, 2017. 滇东北乐红—茂租地区铅锌银多金属矿“三位一体”成矿特征及模型[J]. 矿产勘查, 8（5）: 759 − 764
Ming T X, Tang Z, Bao C F, et al., 2017. Metallogenic characteristics and model of Pb−Zn−Ag polymetallic deposit in Lehong−Maozu, northeastern Yunnan. Mineral Exploration, 8（5）: 759 − 764（in Chinese with English abstract）.
[15] 秦建华, 廖震文, 朱斯豹, 等, 2016. 川滇黔相邻区碳酸盐岩容矿铅锌矿成矿特征[J]. 沉积与特提斯地质, 36（1）: 1 − 13.
Qin J H, Liao Z W, Zhu S B, et al., 2016. Mineralization of the carbonate-hosted Pb-Zn deposits in the Sichuan-Yunnan-Guizhou area, southwestern China[J]. Sedimentary Geology and Tethyan Geology, 40（4）: 103 − 110（in Chinese with English abstract）.
[16] 荣惠锋, 贺胜辉, 徐恒, 等, 2013. 云南省金沙厂铅锌矿矿床地质特征及找矿方向[J]. 地球学报, 34（增刊1）: 81-86
Rong H F, He S H, Xu H, et al. , 2013. Geological Characteristics and Ore-prospecting Or-ientations of the Jinshachang Lead-zinc Deposit in Yunnan Province[J]. Acta Geoscientica Sinica, 34（Supp. 1）: 81-86（in Chinese with English abstract）.
[17] 唐忠, 李文昌, 王长兵, 等, 2016. 滇东北 Pb-Zn-（Ag） 多金属矿床找矿突破关键基础地质问题[J]. 吉林大学学报（ 地球科学版）, 46（3）: 722-735
Tang Z, Li W C, Wang C B, et al. , 2016. Critical Geological Issues About Ore-Prospecting Breakthrough of Pb-Zn-（Ag） Polymetallic Deposit in Northeast Yunnan[J]. Journal of Jilin University（Earth Science Edition）, 46（3）: 722-735（in Chinese with English abstract）.
[18] 王健, 2018. 中上扬子地台西南缘大型铅锌矿床定位规律研究[D]. 武汉: 中国地质大学（武汉）.
Wang J, 2018. Localization rules of large Pb−Zn deposits in the southwestern margin of the Upper−Middle Yangtze block[D]. Wuhan: China University of Geosciences（Wuhan）（in Chinese with English abstract）.
[19] 武俊婷, 李国猛, 李义邦, 等, 2019. 川滇黔接壤区MVT铅锌矿床年代学研究进展及成矿构造背景[J]. 地质科技情报, 38（4）: 134-144
Wu J T, Li G M, Li Y B, et al. , 2019. Chronology Research Progress of the MVT Lead-Zinc Deposit in the Border Area of Sichuan-Yunnan-Guizhou and the Background of Metallogenic Tectonics[J]. Geological Science and Technology Information, 38（4）: 134-144（in Chinese with English abstract）.
[20] 吴永涛, 韩润生, 2019. 滇东北矿集区茂租铅锌矿床地球化学特征[J]. 吉林大学学报（地球科学版）, 49（2）: 400-413
Wu Y T, Han R S, 2019. C, O, Sr Isotope and REE Geochemistry of Maozu Pb-Zn Deposit in Northeastern Yunnan Min-eral Concentration Area[J]. Journal of Jinlin University（Earth Science Edition）, 49（2）: 400-413（in Chinese with English abstract）.
[21] 杨清, 张均, 王健, 等, 2017. 滇东北茂租大型铅锌矿床成矿流体地球化学研究[J]. 矿产与地质, 31（5）: 854-863 doi: 10.3969/j.issn.1001-5663.2017.05.003
Yang Q, Zhang J, Wang J, et al. , 2017. Study of ore-forming fluid geochemistry of Mao-zu large-scale lead-zinc deposit in northeast Yunnan[J]. Mineral Resources and Geology, 31（5）: 854-863（in Chinese with English abstract）. doi: 10.3969/j.issn.1001-5663.2017.05.003
[22] 张荣伟, 彭建堂, 邓起东, 等, 2017. 滇东北茂租热液型铅锌矿床矿物组合共生分异的热力学Eh-pH相图[J]. 地质论评, 63（5）: 1391-1400
Zhang R W, Peng J T, Deng Q D, et al. , 2017. The Eh-pH thermodynamic phase diagram reflecting the intergrowth and differentiation of mineral groups in Maozu hydrothermal type deposits of Northeastern Yunan[J]. Geological Review, 63（5）: 1391-1400（in Chinese with English abstract）.
[23] 张荣伟, 2013. 云南茂租铅锌矿矿床地球化学特征与矿床成因研究[D]. 昆明: 昆明理工大学.
Zhang R W, 2013. Geochemical characteristics and genesis of Maozu lead zinc deposit in Yunnan Province[D]. Kunming: Kunming University of Science and Technology（in Chinese）.
[24] 张玙, 金灿海, 沈战武, 等, 2018. 滇东北巧家茂租铅锌矿成矿流体中的碳来源及矿床成因浅析[J]. 矿物岩石, 38（4）: 49 − 55
Zhang Y, Jin C H, Shen Z W, et al., The resources of carbon isotope in ore−forming fluids and discussion of ore genesis of the maozu pb−zn deposit, northeast yunnan province[J]. Journal of Mineralogy and Petrology, 38（4）: 49 − 55（in Chinese with English abstract）.
[25] 赵准, 1995. 滇东、滇东北地区铅锌矿床的成矿模式[J]. 云南地质, 14（4）: 350 − 354.
Zhao Z, 1995. Metallogenic model of Pb Zn deposits in eastern and northeastern Yunnan. Geology of Yunnan[J]. 14 （4）: 350 − 354.（in Chinese with English abstract）.
[26] 周家喜, 黄智龙, 高建国, 等, 2012. 滇东北茂租大型铅锌矿床成矿物质来源及成矿机制[J]. 矿物岩石, 32（3）: 62-69 doi: 10.3969/j.issn.1001-6872.2012.03.009
Zhou J X, Huang Z L, Gao J G, et al. , 2012. Sources of ore-forming metals and fluids, and mechanism of mineralization, maozu large carbonare-hosted lead-znic deposit, northeast yunnan province[J]. J Mineral Petrol, 32（3）: 62-69（in Chinese with English abstract）]. doi: 10.3969/j.issn.1001-6872.2012.03.009
-
图(12)
表(1)
计量
- 文章访问数: 635
- PDF下载数: 32
- 施引文献: 0