利用平衡剖面探讨贵州省务川县老屋基--簸箕岩汞矿床构造变形特征  

Utilizing Balanced Cross Section Technique to Discuss Laowuji-Bojiyan Mercury Deposit Tectonic Deformation Character,Wuchuan County,Guizhou Province

作　　者：朱德彬[1,2] 

机构地区：[1]贵州省地质矿产勘查开发局108地质大队,贵阳550005 [2]贵州省地质矿产勘查开发局区域地质调查研究院,贵阳550005

出　　处：《地质科技情报》2015年第3期1-6,共6页Geological Science and Technology Information

摘　　要：对务川县老屋基-簸箕岩汞矿床的区域成矿地质背景、矿床特征、构造基本特征的总结分析表明,岩层受燕山运动影响强烈变形,褶皱和断裂构造发育。利用平衡地质剖面方法,对矿区中部太坝-双木垭剖面进行平衡后计算出该区地层在燕山期造山运动中褶皱的收缩率为45.65%,基于构造演化变形特征及其与汞矿成矿关系的分析表明其成矿时代为燕山期。利用相同方法,对相邻3条剖面复原了本区地层在燕山期末受断裂变形的原始褶曲形态为一复式背斜,包括5个次级向斜和6个次级背斜。平衡地质剖面方法对今后在务川汞矿带外围寻找隐伏矿床有指导意义。The basis of ＂balance section＂ technique is balanced in the in line section. Based on this theory, the length, area（2D）, volume（3D） of the strata are the deformed structure in the section can be entirely or partialy recovered by integrating with geometry and kinematic theories. This paper briefly describes the mineralization geologic background and geologic character of the deposit and tectonic deformation character of Laowuji-Bojiyan mercury deposit in Wuchan County. The rock strata in this region are strongly influ- enced by Yanshanian movement and the folding and faulting tectonic are extensively developed. In this pa- per, the percent shrinkage （45.65 %）of study area duing the Yanshan orogeny period is calcullated by u- sing the ＂balance section＂ technique. This paper reveals that metallogenic epoch of the study region is Yanshanian period by analyzing the relationship between tectonic deformation and mercury mineralization. This paper also reconstructs the original folded forms by using the same method on the three adjacent sec- tions. The original folded forms is anticlinorium and it consists of five secondary syncline and six secondary anticline. This paper concludes that the balanced cross section technique has guidance significance for pros- pecting concealed deposits outside the Wuchuan mercury mineralization belt in the future.

关 键 词：汞矿床 平衡剖面 构造变形 老屋基-簸箕岩 务川县 贵州省 

分 类 号：P54[天文地球—构造地质学]