矿床剥蚀程度研究现状综述

Review on Ore-Deposit Denudation Degree Study

矿床剥蚀程度作为判断矿床保存现状、评价找矿前景的重要因素之一,目前已成为众多学者所关注的热点,但也是矿床学研究的难点之一。影响矿床剥蚀程度的主要因素包括构造活动、矿床类型、古气候以及成矿后矿床所遭受的剥蚀改造时间等。矿床剥蚀程度的研究经历了定性→半定量→定量的发展历程。虽然目前能够用来判断矿床剥蚀程度的方法较多,如矿化垂向分带法、矿物标型法、矿物压力计法、原生晕综合轴向分带法以及地质热年代学方法等,但大多数方法仅能得出一个定性-半定量的对比结果,这使得现阶段矿床剥蚀程度的研究难以满足人们对其精确判断的要求。在前人研究的基础上,综述了矿床剥蚀程度的研究进展,分析了影响矿床剥蚀程度的因素,并着重对判断矿床剥蚀程度的有关具体方法进行了总结和评述。

Oredeposit denudation degree is one of the important factors for judging current preservation situation of oredeposit and evaluating its prospecting potential. It has already been a hot topic to study yet also it is one of the difficulties to study mineral deposit. The main factors of affecting oredeposit denuda tion degree include tectonic activity, deposit type, paleoclimate, and timing of postore denudation and transfromation. Study on oredeposit denudation degree experienced a development from qualitative to semiquantitative and then to quantitative stage. Although many methods are able to judge oredeposit de nudation degree, such as mineralization vertical zoning method, mineral typomorphic method, geobarome try method, axial zoning sequence of primary halo method, and fission track method, most methods can only obtain a qualitativesemiquantitative comparison results, which makes the study on oredeposit denu dation degree difficult to meet the present requirements of its precise judgment. Base on previous study, this paper discusses the research progress of oredeposit denudation degree, analyzed the factors of affecting 3redeposit denudation degree, and summarized and commented different methods of judging oredeposit de 3udation degree.