Application of integrated geophysical methods in gold deposit prediction: A case study of Zhengjia gold deposit in Jiaodong area
-
摘要: 山东省胶东地区金矿资源丰富,成矿潜力巨大,但主要控矿构造焦家断裂向南延伸区域的地质露头较差,且深部断裂延伸情况不明,制约了该区下一步金矿找矿进展。在山东省莱州市郑家地区采用高精度磁法勘探、纵向中间梯度激电剖面法和激电测深法开展了联合探测应用研究,建立了三维地球物理模型,结合钻孔和地质资料进行了异常区综合解译和成矿预测。初步厘定了深部电性结构为NE走向、略向东倾伏的焦家断裂南段,查明了中浅部构造破碎带和断裂产状变化部位是成矿有利位置。因金矿物主要赋存于黄铁矿、黄铜矿和石英中,故地球物理找矿方向为高视极化率异常的构造破碎带。研究结果验证了综合地球物理探测在金矿预测中具有可实施性,同时为类似地质条件下找矿手段的选择提供参考。Abstract: Jiaodong area of Shandong Province is rich in gold resources and has great ore-forming potential. However, the geological outcrop condition is poor in the southward extension area of Jiaojia fault, which is the main ore-controlling structure, and the deep fault extension is unknown, seriously restricting the progress of ore prospecting. A joint exploration and application study was carried out using high-precision magnetic prospecting, longitudinal intermediate gradient IP profiling and IP sounding in Zhengjia area of Laizhou City in Shandong Province. A three-dimensional geophysical model was established, and a comprehensive interpretation of anomaly areas and metallogenic prediction were carried out, combined with borehole and geological data. The deep electrical structure of the southern section of Jiaojia fault was preliminarily determined to be NE trend, with a slight dip to the east, and the favorable locations for mineralization were middle-shallow tectonic fracture zone and the change site of the fault occurrence. Because gold minerals mainly occur in pyrite, chalcopyrite and quartz, the geophysical prospecting direction should be a tectonic fracture zone with high apparent polarizability anomaly. The feasibility of integrated geophysical prospecting in gold deposit prediction was verified in this paper, and it also could provide some references for the selection of prospecting means under similar geological conditions.
-
-
[1] 宋明春,杨立强,范宏瑞,等.找矿突破战略行动十年胶东金矿成矿理论与深部勘查进展[J].地质通报,2022,41(6):903-935.
Song M C,Yang L Q,Fan H R,et al.Current progress of metallogenic research and deep prospecting of gold deposits in the Jiaodong Peniusula during 10 years for Exploration Breakthrough Strategic Action[J].Geological Bulletin of China,2022,41(6):903-935.
[2] 宋明春,林少一,杨立强,等.胶东金矿成矿模式[J].矿床地质,2020,39(2):215-236.
Song M C,Lin S Y,Yang L Q,et al.Metallogenic model of Jiaodong Peninsula gold deposits[J].Mineral Deposits,2020,39(2):215-236.
[3] 张琪彬,宋明春,丁正江,等.胶东焦家巨型金矿床的剥露历史与保存[J].中国科学:地球科学,2022,52(7):1391-1408.Zhang Q B,Song M C,Ding Z J,et al.Exhumation history and preservation of the Jiaojia giant gold deposit,Jiaodong Peninsula[J].Science China Earth Sciences,2022,65(6):1161-1177.
[4] 杨立强,魏瑜吉,王偲瑞,等.胶东金矿床中关键金属资源储量估算与潜力初探[J].岩石学报,2022,38(1):9-22.
Yang L Q,Wei Y J,Wang S R,et al.A preliminary study of reserve estimate and resource potential assessment of critical elements in the Jiaodong gold deposits,China[J].Acta Petrologica Sinica,2022,38(1):9-22.
[5] 李逸凡,李洪奎,陈国栋,等.论山东胶东金矿形成的挤压-伸展构造环境[J].大地构造与成矿学,2019,43(6):1117-1132.
Li Y F,Li H K,Chen G D,et al.On the compression-extensional tectonic environment and gold mineralization in the Jiaodong Area,Shandong Province[J].Geotectonica et Metallogenia,2019,43(6):1117-1132.
[6] 侯爵,武澄泷,俞贵平,等.胶东金矿集中区深部结构研究进展[J].地球物理学进展,2022,37(3):952-963.
Hou J,Wu C L,Yu G P,et al.Research progress on the deep structure of Jiaodong gold deposit concentration area[J].Progress in Geophysics,2022,37(3):952-963.
[7] 陈大磊,王润生,贺春艳,等.综合地球物理探测在深部空间结构中的应用——以胶东金矿集区为例[J].物探与化探,2022,46(1):70-77.
Chen D L,Wang R S,He C Y,et al.Application of integrated geophysical exploration in deep spatial structures:A case study of Jiaodong gold ore concentration area[J].Geophysical and Geochemical Exploration,2022,46(1):70-77.
[8] 贺颢,孟庆敏,满延龙,等.航空物探(电、磁)综合测量与胶东金矿普查[J].物探与化探,2005,29(5):397-400.
He H,Meng Q M,Man Y L,et al.The application of airborne geophysical (Electric,Magnetic) integrated survey to gold exploration in Jiaodong area[J].Geophysical & Geochemical Exploration,2005,29(5):397-400.
[9] 黄鑫,王勇军,宋倩,等.胶东北部大柳行金矿田成矿构造的广域电磁法勘查及对深部找矿的指示[J].地质通报,2022,41(6):1107-1120.
Huang X,Wang Y J,Song Q,et al.Wide field electromagnetic exploration and prospecting of metallogenic structures in Daliuhang gold field,the north of Jiaodong[J].Geological Bulletin of China,2022,41(6):1107-1120.
[10] 曹春国,于义文,郭国强,等.综合物探技术在三山岛断裂带与焦家断裂带深部成矿模式中的应用[J].山东国土资源,2012,28(4):19-24.
Cao C G,Yu Y W,Guo G Q,et al.Analysis on ore-forming model in deep part of Jijia gold deposit in Sanshandao by using integrated geophysical exploration method[J].Shandong Land and Resources,2012,28(4):19-24.
[11] 杨鹤明,姚正煦,董美丽.山东中部及东部地区航空物探(磁及放射性)工作结果报告[R].地质部地球物理探局航测902队,1960.Yang H M,Yao Z X,Dong M L.Report on Results of Airborne Geophysical Exploration (Magnetic and Radiological) Work in Central and Eastern Shandong[R].902 Aerial Survey Team of the Geophysical Exploration Bureau of the Ministry of Geology,1960.
[12] 张秉祥,季顺乐,于在利.山东省胶东地区区域重力调查成果报告:1/20万[R].济南:山东省地矿局物化探大队,1986.Zhang B X,Ji S L,Yu Z L.Report of Regional Gravity Survey Results in Jiaodong Area of Shandong Province:1∶200 000[R].Jinan:Shandong Provincial Bureau of Geology and mineral Resources,1986.
[13] 杨德平. 山东省胶东地区1/20万地球化学图说明书:水系沉积物测量[R].济南:山东省地矿局区调队,1994.Yang D P.Description of 1∶200 000 geochemical Map of Jiaodong Area,Shandong Province:Stream Sediment Survey[R].Jinan:Shandong Provincial Bureau of Geology and mineral Resources,1994.
[14] 李士先,文子中,吕植让,等.山东省金矿资源总量预测报告[R].烟台:山东省地矿局第六地质队,1986.Li S X,Wen Z Z,Lv Z R,et al.Forecast Report of Total Gold Resources in Shandong Province[R].Yantai:The Sixth Geological Team of Shandong Bureau of Geology and Mineral Resources,1986.
[15] 秦升强,史高飞,韩东,等.山东省平度市旧店东部地区金矿普查报告[R].青岛:青岛地质工程勘察院,2010.Qin S Q,Shi G F,Han D,et al.Survey Report of Gold Deposit in The East Area of Jiudian,Pingdu City,Shandong Province[R].Qingdao:Qingdao Geological Engineering Survey Institute,2010.
[16] 宋明春,崔书学,姜洪利.山东胶西北矿集区和焦家金矿田成矿构造系统[J].地质通报,2011,30(4):573-578.
Song M C,Cui S X,Jiang H L.Metallogenic structural system for Jiaojia gold field and Jiaoxibei gold deposits concentrated areas in Shandong Province,China[J].Geological Bulletin of China,2011,30(4):573-578.
[17] 朱兴明,周鑫,杨斌,等.胶东金矿床蚀变岩岩石地球化学特征与水岩反应机理分析[J].黄金,2021,42(9):12-17.
Zhu X M,Zhou X,Yang B,et al.Lithogeochemistry of the alterated rocks and water-rock interaction mechanism in the gold deposits,Jiaodong Peninsula[J].Gold,2021,42(9):12-17.
[18] 宋雪龙,李俊建,李秀章,等.胶东金矿床成矿流体、稳定同位素及成矿时代研究进展[J].地质找矿论丛,2014,29(1):13-19.
Song X L,Li J J,Li X Z,et al.The research progress of ore-forming fluids,stable isotope and mineralizing age in Jiaodong peninsular of eastern China[J].Contributions to Geology and Mineral Resources Research,2014,29(1):13-19.
[19] 张然,肖志斌,付超,等.胶东地区新立金矿中金矿物和载金黄铁矿成因矿物学特征及地质意义[J].岩矿测试,2022,41(6):997-1006.
Zhang R,Xiao Z B,Fu C,et al.Genetic mineralogy and geological significance of gold minerals and gold-bearing pyrites from the Xinli gold deposit in the Jiaodong area[J].Rock and Mineral Analysis,2022,41(6):997-1006.
[20] 李杰,安梦莹,宋明春,等.胶东金矿硫同位素组成特征及其来源[J].地质通报,2022,41(6):993-1009.
Li J,An M Y,Song M C,et al.Sulfur isotopic composition and its source of Jiaodong gold deposit[J].Geological Bulletin of China,2022,41(6):993-1009.
[21] 吕新友,傅良魁.金属矿石的激发极化非线性谱特征[J].物探与化探,1991,15(5):358-365.
Lv X Y,Fu L K.IP nonlinear spectra of ores[J].Geophysical & Geochemical Exploration,1991,15(5):358-365.
-
计量
- 文章访问数: 129
- PDF下载数: 8
- 施引文献: 0
下载: