地质通报2025，Vol.44Issue(9)：1673-1680,8.DOI:10.12097/gbc.2023.11.009
基于三维地震探测的焦家断裂带深部结构特征及其控矿模型的建立
Deep structural characteristics and ore-controlling model of the Jiaojia fault zone based on 3D seismic detection
摘要
Abstract
[Objective]Jiaojia fault belt is one of the most important gold mineralization belts in the northwest of Jiaodong,and more than 20 gold deposits have been identified within the belt and its branch faults,with discovered gold reserves exceeding 1000 tons.Goldorebodies mainly occur at the turning point of the dip angle of the fault,which constitutes a"stepped"distribution pattern.With the increase of exploration depth,the exploration resolution of conventional geophysical exploration methods can no longer meet the demand for locating the"third metallogenicstep".[Methods]In order to identify the deep structure characteristics of the Jiaojia fault belt,his study adopted 3D seismic detection method,which has the characteristics of high signal-to-noise ratio,high resolution and ultra-deep detection capability.Based on the previous geological and well logging data in study area,a geological model was constructed.[Results]Through forward modeling analysis,it was determined that the characteristics of the same phase axis diffraction,dislocation and transverse continuity variation of the fault belt on the seismic section were related to the changes in the occurrence position of the orebodies and the occurrence changes of the fault belt.By using key techniques such as prestack noise elimination,static correction,velocity analysis,and poststack migration were used to obtain seismic profile with high signal-to-noise ratio,clearer wave group,clear breakpoints,and reliable structural morphology.Using the"geological cap"technique to calibrate the stratigraphic relationship between earthquakes and geology.The seismic reflection waves were also recognized,and the differences between the sectional reflection waves and the layered reflection waves inside the rock mass were clarified.The 3D fracture-controlled mineralization model was established through the integration of 3D seismic interpretation and borehole data.[Conclusions]This study revealed that deep-seated faults within the Jiaojia fault zone exhibit alternating steep and gentle occurrences,with minimal impact from post-mineralization faulting,highlighting the significant efficacy of 3D seismic methods in structural geological interpretation.关键词
焦家断裂带/三维地震探测/深部断裂结构特征/断裂控矿三维模型Key words
Jiaojia fault belt/3D seismic detection/deep structural features/fracture-controlled ore deposit 3D model分类
天文与地球科学引用本文复制引用
闫春明,周晓萍,刘向东,胡秉谦,张亮亮,黄天梁,姜帆,胡兆君,王斌..基于三维地震探测的焦家断裂带深部结构特征及其控矿模型的建立[J].地质通报,2025,44(9):1673-1680,8.基金项目
山东省地矿局2025年海洋地质勘查项目《胶东地区陆海一体化金矿勘查技术研究与应用示范项目》(编号:HJ202505)、山东省地矿局2025年度科技攻关项目《基于多模态大模型的胶东金矿智能预测系统建设与示范(原型)——以胶西北矿集区为例》(编号:KY202502) Supported by Shandong Provincial Bureau of Geology and Mineral Resources 2025 Marine Geological Survey Project"Research and Demonstration of Integrated Land-Sea Gold Deposit Exploration Technology in the Jiaodong Area"(No.HJ202505)and Shandong Provincial Bureau of Geology and Mineral Resources 2025 Science and Technology Key Project"Construction and Demonstration of an Intelligent Prediction System for Jiaodong Gold Deposits Based on Multimodal Large Models(Prototype)-Taking the Jiaonan Mineral Concentration Area as an Example"(No.KY202502) （编号:HJ202505）
