Prospecting criteria for skarn-type iron deposits in the thick overburden area of Qihe-Yucheng mineral-rich area using geological and geophysical modelling

IF 2.2 3区 地球科学 Q2 GEOSCIENCES, MULTIDISCIPLINARY
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Abstract

The gravity and magnetic anomalies in the Qihe-Yucheng mineral-rich area of Shandong Province, China, lie nearly north–south. However, the anomalies in the Pandian area in the central part of the region are small in scale and weak in intensity, and the geophysical information of deep iron ore bodies is greatly weakened, making it difficult to identify and extract mineral-induced magnetic anomalies. Based on the exploration of gravity and magnetic anomalies in adjacent mining areas, and through plane analysis and quantitative inversion of these anomalies in the Pandian area, the structural framework division, delineation of ore-forming geological bodies, anomaly analysis research, and two-and-a-half dimensional (2.5D) joint inversion in the study area were achieved. Deep information under an ultradeep overburden was obtained, and a new breakthrough in the exploration of skarn-type iron ore was achieved. The results of this study can provide important references for further exploration of deep ore deposits under ultra-deep overburden layers and indicate the potential for the exploration of skarn-type iron deposits in the Qihe-Yucheng mineral-rich area.

利用地质和地球物理模型确定齐河-禹城富矿区厚覆盖层矽卡岩型铁矿床的找矿标准
中国山东省齐河-禹城富矿区的重力异常和磁异常几乎呈南北走向。但该地区中部潘店地区异常规模小、强度弱,深部铁矿体地球物理信息大大弱化,难以识别和提取矿致磁异常。在对邻近矿区重力异常和磁异常进行勘探的基础上,通过对潘店地区的这些异常进行平面分析和定量反演,实现了研究区的构造框架划分、成矿地质体圈定、异常分析研究和二维半(2.5D)联合反演。获得了超深覆盖层下的深部信息,实现了矽卡岩型铁矿勘探的新突破。该研究成果可为超深覆盖层下深部矿床的进一步勘探提供重要参考,并预示了齐河-禹城富矿区矽卡岩型铁矿的勘探潜力。
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来源期刊
Journal of Applied Geophysics
Journal of Applied Geophysics 地学-地球科学综合
CiteScore
3.60
自引率
10.00%
发文量
274
审稿时长
4 months
期刊介绍: The Journal of Applied Geophysics with its key objective of responding to pertinent and timely needs, places particular emphasis on methodological developments and innovative applications of geophysical techniques for addressing environmental, engineering, and hydrological problems. Related topical research in exploration geophysics and in soil and rock physics is also covered by the Journal of Applied Geophysics.
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