高精度重磁测量在覆盖区找矿中的应用——以无为县蔚山铁铜矿预查为例

doi:10.11720/wtyht.2019.0137

Abstract
Figure/Table
References
Related Citation (15)

Download: PDF (2250 KB) HTML (1 KB)
Export: BibTeX | EndNote (RIS)

Abstract

In the coverage area, it is very difficult to carry out the conventional geological work , whereas the high-precision gravity and magnetic survey methods can quickly and effectively divide the buried faults and determine the rock boundary, which provides important assistance for prospecting in the coverage area. With the Weishan iron-copper deposit reconnaissance in Wuwei County of Anhui Province as an example, the authors divided the faults and determined rock boundary in the pre-investigation area through the processing and analysis of gravity and magnetic anomalies. Combined with geological features, two gravity and magnetic anomalies with large potential for prospecting were screened where a 40 m rich iron orebody with a TFe grade of about 52% and a mFe grade of about 38% was found by drilling. Therefore, the effectiveness of the method is confirmed, and this result also has certain guiding significance for the prospecting work in the eastern marginal coverage area of the Luzong volcanic basin where the investigation area is located.

Key words： prospecting in the coverage area high precision gravity and magnetic survey 2.5D gravity and magnetic inversion Luzong volcanic basin

Received: 13 March 2019 Published: 28 November 2019

P631

	Service

	E-mail this article
	Add to my bookshelf
	Add to citation manager
	E-mail Alert
	RSS
	Articles by authors
	Min ZHAO
	Yong SHENG
	Liang-Gang QI

Cite this article:

Min ZHAO,Yong SHENG,Liang-Gang QI. The application of high precision gravity and magnetic survey to prospecting in coverage area:A case study of the reconnaissance of Weishan iron and copper deposit in Wuwei County[J]. Geophysical and Geochemical Exploration, 2019, 43(6): 1211-1216.

URL:

https://www.wutanyuhuatan.com/EN/10.11720/wtyht.2019.0137 OR https://www.wutanyuhuatan.com/EN/Y2019/V43/I6/1211

Geological map in the Weishan area of Wuwei in Anhui province
1—Quaternary system;2—Paleogene system;3—Jurassic Luoling Fm;4—Jurassic Moshan Fm;5—Triassic Dongmaanshan Fm;6—Devonian Wutong Fm;7—Silurian Maoshan Fm;8—Silurian Fentou Fm;9—Quartz syenite;10—Syenite;11—fault;12—Pre-investigation area

Gravity and magnetic anomaly map of the Luzong area
1—Δg contour;2—gravity high;3—gravity low;4—ΔT negative contour;5—ΔT zero contour;6—ΔT positive contour;7—pre-investigation area

Bouguer gravity anomaly map in Weishan area

ΔT apolar anomaly map in Weishan area

Residual gravity and magnetic anomaly map in Weishan area
1—residual positive magnetic anomaly;2—residual gravity high;3—residual gravity low;4—inferred faults;5—inferred rock mass;6—drilling

Line 11 2.5D gravity and magnetic inversion profile
1—Quaternary system;2—Triassic middle series;3—Triassic lower series- Permian system;4—Permian Qixia Fm;5—Carboniferous system;6—Devonian system-Silurian system;7—Silurian lower-middle series ;8—Andesiticporphyrite;9—inferred rock mass;10—inferred magnetite ore;11—design drilling and number

[1]	徐启东, 张晓军, 尚恒胜 , 等. 构建覆盖区综合地质找矿思路和流程的探索:以内蒙古锡林郭勒西北部为例[J]. 地球科学—中国地质大学学报, 2012,37(6):1252-1258.
[1]	Xu Q D, Zhang X J, Shang H S , et al. New approach of integrated geological prospection in covered areas: A case study from northwestern Xilingguole, Inner Mongolia[J]. Earth science—Journal of China University of Geosciences, 2012,37(6):1252-1258.
[2]	吴明安, 侯明金, 赵文广 . 安徽省庐枞地区成岩规律及找矿方向[J]. 资源调查与环境, 2007,28(4):269-277.
[2]	Wu M A, Hou M J, Zhao W G . Mineralization regularity and exploration direction in Luzong area[J]. Resources survey & Environment, 2007,28(4):269-277.
[3]	宋方敏, 邓志辉, 马晓静 , 等. 长江谷地安庆—马鞍山段新构造和断裂活动特征[J]. 地震地质, 2008,30(1):100-110.
[3]	Song F M, Deng Z H, Ma X J , et al. Neotectonics and Fault activity in the Anqing-Ma’anshan section of the Chang Jiang River valley[J]. Seismology and Geology, 2008,30(1):100-110.
[4]	地矿部第一综合物探大队. 安徽省庐枞盆地1∶5万物化探普查工作成果报告[R]. 1984.
[4]	The first integrated geophysical institute of Ministry of Geology and Mineral. Prospecting report for 1∶50,000 geophysical and geochemical exploration of Luzong basin of Anhui Province[R]. 1984.
[5]	安徽省地球物理地球化学勘查技术院. 安徽省区域岩石物性采测与特征分析[R]. 1986.
[5]	Anhui Institute of Geophysical and Geochemical Prospecting Techniques. Analysis on the measurement and characteristics of regional petrophysical properties in Anhui Province[R]. 1986.
[6]	戚良刚, 王建伟, 黄传杨 , 等. 庐枞地区重磁场特征及其地质认识[J]. 安徽地质, 2008,18(4):277-281.
[6]	Qi L G, Wang J W, Huang C Y , et al. Characteristic and geological understanding of gravity, Aeromagnetic field in Luzong area[J]. Geology of Anhui, 2008,18(4):277-281.
[7]	张季生, 高锐, 李秋生 , 等. 庐枞火山岩盆地及其外围重、磁场特征[J]. 岩石学报, 2010,26(9):2613-2622.
[7]	Zhang J S, Gao R, Li Q S , et al. Characteristics of gravity and magnetic field of Luzong volcano basin and its periphery[J]. Acta Petrologica Sinica, 2010,26(9):2613-2622.
[8]	刘彦, 吕庆田, 严加永 , 等. 庐枞矿集区结构特征重磁研究及其成矿指示[J]. 岩石学报, 2012,28(10):3125-3138.
[8]	Liu Y, Lv Q T, Yan J Y , et al. The structure of Luzong ore district and its metallogenic indication from gravity and magnetic information. Acta Petrologica Sinica, 2012,28(10):3125-3138.
[9]	程方道, 刘东甲, 姚汝信 . 划分重力区域场与局部场的研究[J]. 物探化探计算技术, 1987,9(1):1-9.
[9]	Cheng F D, Liu D J, Yao R X . A study on the identification of regional and local gravity fields[J]. Computing techniques for geophysical and geochemical exploration, 1987,9(1):1-9.
[10]	赵玉岩, 吴燕冈, 郝立波 . 利用航磁数据识别浅覆盖区地质体的方法研究[J]. 物探化探计算技术, 2008,30(2):125-127.
[10]	Zhao Y Y, Wu Y G, Hao L B . A study on litho logic identification in shallow cover areas from aeromagnetic[J]. Computing Techniques for Geophysical and Geochemical Exploration, 2008,30(2):125-127.
[11]	安徽、湖北、江西、江苏省地质矿产局, 上海市地质中心. 长江中下游铜铁硫金(多金属)成矿带成矿远景区划——长江中下游铜铁硫金(多金属)成矿带地质矿产特征、成矿规律及成矿预测[R]. 1986.
[11]	Anhui, Hubei, Jiangxi, Jiangsu Bureau of Geology and Mineral Resources, Shanghai Geological Center. Metallogenic prospecting of copper-iron-sulfur-gold (polymetallic) metallogenic belts in the Middle-Lower Yangtze River—Geological and mineral characteristics, metallogenic regularity and metallogenic prediction of copper-iron-sulfur-gold (polymetallic) metallogenic belt in the Middle-Lower Yangtze River[R]. 1986.
[12]	常印佛, 刘学圭 . 关于层控式矽卡岩型矿床——以安徽省内下扬子坳陷中一些矿床为例[J]. 矿床地质, 1983,2(1):11-18.
[12]	Chang Y F, Liu X G . On strata-bound skarn deposits[J]. Mineral Deposits, 1983,2(1):11-18.
[13]	邬宗玲, 盛勇, 黄博 , 等. 安徽庐枞火山岩矿集区东南部成矿系列及成矿规律[J]. 华东地质, 2017,38(3):194-202.
[13]	Wu Z L, Sheng Y, Huang B , et al. Mineralization series and metallogenic regularities in the southeastern Luzong volcanic rock ore cluster area, Anhui Province[J]. East China Geology, 2017,38(3):194-202.
[14]	张毅, 徐如刚, 余勇 , 等. 高精度重力测量在隐伏断层探测中的应用[J]. 国际地震动态, 2012,401(5):6-7.
[14]	Zhang Y, Xu R G, Yu Y , et al. Application of high precision gravity survey in concealed fault detection[J]. Recent Developments in World Seismology, 2012,401(5):6-7.
[15]	谢志峰, 张翔 . 炭质地层覆盖区综合物探方法寻找隐伏矿床[J]. 物探与化探, 2010,34(4):448-453.
[15]	Xie Z F, Zhang X . The application of integrated geophysical methods to the prospecting for concealed ore deposits in carbonaceous bed covering areas[J]. Geophysical and Geochemical Exploration, 2010,34(4):448-453.
[16]	刘东甲, 程方道 . 划分重力区域场与局部场的多次切割法[J]. 物探化探计算技术, 1997,19(1):31-35.
[16]	Liu D J, Cheng F D . A multiple-cut method for identification of regional and local gravity fields[J]. Computing techniques for geophysical and geochemical exploration, 1997,19(1):31-35.
[17]	刘彦, 严加永, 吴明安 . 基于重力异常分离方法寻找深部隐伏铁矿—以安徽泥河铁矿为例[J]. 地球物理学报, 2012,55(12):4181-4193.
[17]	Liu Y, Yan J Y, Wu M A . Exploring deep concealed ore bodies based on gravity separation methods: A case study of the Nihe iron deposit[J]. Chinese Journal of Geophysics, 2012,55(12):4181-4193.
[18]	刘彦华, 陈宗刚, 欧阳长亮 . 重磁异常对应分析在相山地区的应用[J]. 物探与化探, 2008,32(6):586-589.
[18]	Liu Y H, Chen Z G , Ou yang Y L. The application of correspondence analysis of gravity and magnetic anomalies in xiangshan area[J]. Geophysical and Geochemical Exploration, 2008,32(6):586-589.
[19]	丁海红, 陈雪, 刘敦华 , 等. 宁芜北段东带矿集区重磁2.5D反演联立剖面特征研究[J]. 华东地质, 2017,38(2):138-146.
[19]	Ding H H, Chen X, Liu D H , et al. Characteristics of integrated 2.5D gravity and magnetism inversion profiles in the ore cluster areas in the eastern section of northern Ningwu[J]. East China Geology, 2017,38(2):138-146.
[20]	赖月荣, 韩磊, 杨树生 . 高精度磁测在阿勒泰冰碛物覆盖区地质填图中的应用[J]. 物探与化探, 2014,38(6):1181-1185.
[20]	Lai Y R, Han L, Yang S S . The effects of applying high precision magnetic survey to geological mapping in Altay glacial till covering area[J]. Geophysical and Geochemical Exploration, 2014,38(6):1181-1185.
[21]	程培生, 李文庆, 何柳昌 , 等. 综合物探在西湾铁多金属矿预查中的应用效果[J]. 物探与化探, 2013,37(6):1003-1007.
[21]	Cheng P S, Li W Q, He L C , et al. The effect of applying integrated geophysical exploration to the pre-survey of the Xiwan iron polymetallic deposit. Geophysical and Geochemical Exploration, 2013,37(6):1003-1007.
[22]	黄宁, 陈国光, 张景 , 等. 综合物探方法在多金属矿找矿靶区预测中的应用[J]. 物探与化探, 2016,40(5):929-934.
[22]	Hang N, Chen G G, Zhang J , et al. Application and study of comprehensive geophysical methods in prospecting target of iron and gopper poly-metallic ore[J]. Geophysical and Geochemical Exploration, 2016,40(5):929-934.
[23]	付建民, 刘因, 宋蓓蓓 , 等. 基于重磁多尺度边缘检测的庐枞盆地基底构造研究[J]. 地质与勘探, 2012,48(5):979-990.
[23]	Fu J M, Liu Y, Song B B , et al. Study on basement structure of the Luzong basin based on gravity and magnetic multi-scale edge detection[J]. Geology and Exploration, 2012,48(5):979-990.
[24]	周涛发, 范裕, 王世伟 . 长江中下游成矿带成矿规律和成矿模式[J]. 岩石学报, 2017,33(11):3353-3372.
[24]	Zhou T F, Fan Y, Wang S W . Metallogenic regularity and metallogenic model of the middle-lower Yangtze River Valley Metallogenic Belt[J]. Acta Petrologica Sinica, 2017,33(11):3353-3372.
[25]	杜建国, 常丹燕 . 长江中下游成矿带深部铁矿找矿的思考[J]. 地质学报, 2011,85(5):687-698.
[25]	Du J G, Chang D Y . Consideration on the deep-iron ore deposits prospecting in the middle-lower Yangtze Metallogenic Belt[J]. Acta Geologica Sinica, 2011,85(5):687-698.
[26]	刘湘培, 常印佛, 吴言昌 . 论长江中下游地区成矿条件和成矿规律[J]. 地质学报, 1988,62(2):167-177.
[26]	Liu X P, Chang Y F, Wu Y C . Metallogenic conditions and regularities in the middle and lower reaches of the Changjiang river[J]. Acta Geologica Sinica, 1988,62(2):167-177.