在齐河—禹城富铁矿重点勘查区找矿过程中，显示该区矽卡岩型铁矿受控因素多，矿体形态复杂，为深入研究侵入岩的侵位地段和蚀变程度与铁矿体的空间关系，用以确定铁矿勘查方向。在分析该重点勘查区成矿地质条件的基础上，通过深入剖析郭店铁矿床控矿要素，研究其成矿地质体——早白垩世闪长岩体与铁矿赋存位置关系。研究表明该区铁矿主要赋存于奥陶纪碳酸盐岩地层与早白垩世闪长岩体接触带处、奥陶纪碳酸盐岩地层中及石炭纪—二叠纪碎屑岩地层中；在该区闪长岩体形成过程中，岩浆在奥陶纪地层中侵位时由于所处环境的差异性致使其侵位及成岩高度差别较大，闪长岩体局部易于形成“支点”。在构建该矿床成矿模式过程中，本文提出了研究区闪长岩体“支点效应”，研究表明该区铁矿在“支点”处多不易形成铁矿体，但具有围岩热接触变质程度高，岩体蚀变强度低等特征；在“支点”周邻地段则容易形成较大构造空间，易于形成厚大的铁矿体。分类总结了识别“支点”的地层、岩体、构造、接触带、蚀变、磁异常、重力异常、电法异常、地震异常等标志。通过矽卡岩型铁矿成矿地质体“支点效应”的深入研究可以分阶段、有步骤地为目标区铁矿勘查工作提供全周期的理论基础和勘查依据。

It has been revealed that the skarn-type iron deposits in Qihe-Yucheng rich iron ore key exploration area are influenced by multiple controlling factors, and the ore bodies exhibit complex morphologies during the prospecting process in the area. In order to conduct in-depth research on the spatial relationship between the intrusion zone and degree of alteration of intrusive rocks with iron ore bodies and subsequently determine the direction of iron ore exploration, the ore-controlling factors of the Guodian iron deposit and the relationship between metallogenic geological body-early Cretaceous diorite and the occurrence location of iron ore bodies are deeply analyzed based on analyzing the ore-forming geological conditions of the key exploration area. The study shows that iron ore bodies in the area mainly occur in the contact zone between Ordovician carbonate rock strata and early Cretaceous diorite, Ordovician carbonate rock strata, and Carboniferous-Permian clastic rock strata. During its formation of the diorite in the area, the intrusion and diagenetic height of the magma varied greatly due to different environments. Parts of diorite easily form "pivot points". In the process of establishing the mineralization model of the deposit, the paper proposes the "pivot effect" of the diorite rock in the study area. The study shows that the iron ore in the area at the "pivot points" is not easy to form iron ore bodies, but surrounding rock experienced high degree of thermal contact metamorphism and diorite alteration occurred with low intensity. It is concluded that thick and massive iron ore bodies easily formed in large structural spaces, which were located in surrounding areas of the "pivot points". Identification criteria for identifying "pivot points" such as strata, intrusive rock, structure, contact zone, alteration, magnetic anomaly, gravity anomaly, electrical anomaly, seismic anomaly, etc was categorized and summarized. The study provides a comprehensive theoretical foundation and prospection guidance for the iron ore exploration in target areas in stages and steps, using in-depth research on the "pivot effect" of the metallogenic geological bodies in skarn-type iron deposits.