鲁西北潘店重磁异常带矽卡岩型铁矿精细找矿方向——来自广域电磁法深部找矿的启示
Fine-scale prospecting targets of skarn iron deposits in the Pandian gravity-magnetic anomaly zone of northwestern Shandong Province:Insights from deep prospecting using the wide-field electromagnetic method
郭国强 1李亚东 2王阳 1于嘉宾 1王润生 1高晓丰 1张大明 3胡东宁 1方磊 1国玮芳1
作者信息
- 1. 山东省物化探勘查院,山东 济南 250013;山东省地质勘查工程技术研究中心,山东 济南 250013;地下资源环境高精度探测山东省工程研究中心,山东 济南 250013
- 2. 山东省第一地质矿产勘查院,山东 济南 2501019
- 3. 河北省煤田地质局物测地质队,河北 邢台 054000
- 折叠
摘要
山东省鲁西北潘店地区超深覆盖区航磁和重力异常明显,通过系统的重磁异常查证工作,在研究区重磁异常带开展的多个钻孔均取得了深部矽卡岩型铁矿床找矿突破,但由于重磁异常带范围较大且其特征不能直接指示找矿方向,造成部分钻孔不见矿或见矿情况差.因此,为了更好地在重磁异常带精细圈定成矿位置,实现新的更大的找矿大突破,本文旨在已查证的潘店重磁异常带开展广域电磁测深(WFEM)工作,结合钻探验证情况,圈定深覆盖区矽卡岩型铁矿深部成矿区间及成矿有利结构面,提出深部精细找矿方向.
Abstract
Significant aeromagnetic and gravity anomalies were found in the ultra-deep coverage zone of the Pandian area in the north-western Shandong Province.Through systematic verification of gravity and magnetic anomalies,a breakthrough in prospecting for deep skarn iron deposits has been achieved through several boreholes around the Pandian gravity-magnetic anomaly zone.However,the grav-ity-magnetic anomaly zone spreads extensively and its characteristics cannot directly indicate the prospecting target,thus some bore-holes failed to find ores or revealed poor ore-finding conditions.Hence,to accurately delineate the ore-forming location in the gravity-magnetic anomaly zone and achieve a further breakthrough in ore prospecting,this study conducted the wide-field electromagnetic(WFEM)sounding in the verified Pandian gravity-magnetic anomaly zone.Combining the drilling verification,this study delineated the deep ore-forming interval of skarn iron deposits in the deep coverage zone and the favorable structural plane for ore-forming,sugges-ting the deep fine-scale prospecting targets.
关键词
潘店地区/矽卡岩型铁矿/重磁异常带/广域电磁测深/精细找矿方向Key words
Pandian area/skarn iron deposit/gravity-magnetic anomaly zone/wide-field electromagnetic sounding/fine-scale pros-pecting target引用本文复制引用
基金项目
全国重要矿集区找矿预测项目(DD2016005223)
山东省自然资源厅部省协议地质勘查项目(2022)(鲁勘字202224号)
山东省地质矿产勘查开发局局地质勘查引领示范与科技攻关计划(2022)(鲁地字[2022]15号)
山东省重大科技创新工程项目(2018CXGC1601)
出版年
2024
国家科技期刊平台
NSTL
万方数据