CAJ | 학술논문

矿产勘探中应用最广泛、成本最低的方法就是重力和磁法勘探，它们在靶区优选、隐伏矿定位等不同勘查阶段均发挥了重要作用。但是重磁解释的反演结果往往产生多解性，因而需要采用有效方法来减小多解性。无约束的反演通常很难得到符合实际地质情况的解，因此地质约束反演是现阶段降低多解性的主要途径。本文从模型试验入手，开展了三维密度填图技术研究。对比了无约束与有约束以及约束多少的反演效果，结果发现随着约束条件的增加，反演所得的结果与真实情况的吻合度逐渐增加。本文还以安徽省庐枞矿集区为例，探索了地质信息约束下的重力三维填图技术，获得了矿集区地下5 km深度的三维密度体，该结果揭示了矿集区主要岩体三维分布、构造的起伏和主要地层的展布。模型试验和实例结果表明：地质信息约束的三维密度填图技术，能够降低反演多解性，提高分辨率，优化反演结果，是现阶段实现矿集区“透明化”，发现深部矿产的最有效的方法之一。
광산감탐중응용최엄범、성본최저적방법취시중력화자법감탐，타문재파구우선、은복광정위등불동감사계단균발휘료중요작용。단시중자해석적반연결과왕왕산생다해성，인이수요채용유효방법래감소다해성。무약속적반연통상흔난득도부합실제지질정황적해，인차지질약속반연시현계단강저다해성적주요도경。본문종모형시험입수，개전료삼유밀도전도기술연구。대비료무약속여유약속이급약속다소적반연효과，결과발현수착약속조건적증가，반연소득적결과여진실정황적문합도축점증가。본문환이안휘성려종광집구위례，탐색료지질신식약속하적중력삼유전도기술，획득료광집구지하5 km심도적삼유밀도체，해결과게시료광집구주요암체삼유분포、구조적기복화주요지층적전포。모형시험화실례결과표명：지질신식약속적삼유밀도전도기술，능구강저반연다해성，제고분변솔，우화반연결과，시현계단실현광집구“투명화”，발현심부광산적최유효적방법지일。
Gravity and magnetic survey,the two most widely used and cheaply acquired geophysical datasets in ore deposit exploration,play an important role in the different stages of the mineral exploration.The recovered inverse models can be used to target regions of anomalous physical properties for further data acquisition or drilling.In recent years methods have been developed to calculate inverse solutions that predict the 3D distribution of physical properties required to explain the observed geophysical responses. The inverse calculation,deriving a physical property model from the data,is hampered by numerical problems and non-uniqueness. Therefore,the non-uniqueness of inversion demands that geological information be included.This paper started from model test,and provided a comparison of the inversion results constrained by different geological information.The model test revealed that,as more geological constraints are included,the inversion result is more similar with the true density model.A synthetic example of 3D gravity inversion using geological constraints in Lu-Zong ore concentration district provided a 3D density model within 5km depth which shows the distribution of the main lithology volumes,the structures and the strata.It has proved in this thesis that the geological constrained 3D density mapping can enhance the resolution, optimize the inversion results and is very effective in making the ore concentration district perspective and prospecting the deep mineral.