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| 基金项目：中国地质调查局项目“山东省齐河—禹城矿集区找矿预测”（DD2016005223）、“山东省齐河—禹城矿集区矿产地质调查”（DD20190166） |
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| 摘要： |
| 山东西北部齐河—禹城矿集区矽卡岩型铁矿找矿工作取得了重大突破。该矿集区发育明显的航磁和重力异常，二者具有同源特征。地球物理异常查证工作显示，该区深部发育矽卡岩型铁矿床，成矿时代为早白垩世，铁矿物质主要来源于闪长岩体。铁矿体为地层、侵入岩和构造三者控矿，即铁矿体赋存于奥陶系（石炭系、二叠系）地层、闪长岩体、地层与岩体接触带附近。勘查表明，总体表现为布格重力异常梯度较陡处、剩余重力异常高值处、磁异常较高处、化极磁异常高值处以及高低电阻率转换带是该矿集区矽卡岩型铁矿的找矿有利地段。 |
| 关键词：矽卡岩铁矿 重力异常 磁异常 成矿规律 山东齐河—禹城 |
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| Abstract: |
| A major breakthrough has been made in the prospecting of skarn-type iron deposit in the Qihe-Yucheng mining area in the northwest of Shandong. The mining area shows obvious aeromagnetic and gravity anomalies, and the two are of the same origin. The verification of geophysical anomalies in the area shows that skarn-type iron deposits are developed in the deep part of the area. The ore-forming age is Early Cretaceous, and the iron ore is mainly derived from diorite. The iron ore body is controlled by three factors of ″stratigraphy, intrusive rock and structure″, which means the iron ore body is hosted in the Ordovician (Carboniferous, Permian) strata, diorite, strata and rock mass contact zone. The exploration of iron ore in the area shows that the preferable areas for exploring skarn-type iron ore are those of steep Bouguer gravity anomaly gradient, the abnormally high residual gravity, the high magnetic anomaly, the high polar magnetic anomaly, and the conversion zone of high and low resistivity resistance. |
| Keywords:skarn-type iron ore gravity anomaly magnetic anomaly metallogeny Qihe-Yucheng, Shandong |
| 郝兴中，郭延明,李英平，.山东齐河—禹城矿集区矽卡岩型铁矿成矿规律[J].地质学刊,2019,43(4):566-572 |
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