CAJ | 학술논문

通过分析14个矿床矿化点的分布资料，编制锡矿山锑矿田古成矿环境网络示意图，总结锡矿山锑矿床的14项基本成矿特点，归纳分析前人对本区锑矿成因的5种观点和相关依据，提出锡矿山矿田古环境系统，深?流?障，即深流?环流?障积成矿系统的新认识。湘中晚古生代台内断陷盆地是成矿环境系统的重要地质基础，由西向东NE向5条深切基底的断裂构成断陷盆地的成矿环境主干，而以冷水江大断裂及其分支75号断裂表现尤为突出。锡矿山矿田构造展布、蚀变矿化、包体分析、化探异常，表明它们间存在叠合和耦合关系，并显示出矿田内存在一个由南西向北东，并有多处分支分叉的环境系统。矿田内众多矿体分布表明NE向主断裂带、F 75及其3条分支断裂带与棋梓桥组、佘田桥组、刘家塘组3个层顶界面处为成矿的有利空间，而以佘田桥组顶界处规模最大，连续性最好，组成了完整的障积组合系统。盆地周边侵入岩体和深部可能的地幔柱，是盆内的主要热源，上升热矿水与下渗水的长期环流是盆地内成矿作用重要动力机制，分析并剔除了3种环流(垂向环流、双向环流、洞穴环流)的方式和机制。总结了鉴别古成矿环境系统的4大标志。针对矿田成矿系统环流分布特点，提交了马月山背斜至陈家排的6处有利找矿靶区。
통과분석14개광상광화점적분포자료，편제석광산제광전고성광배경망락시의도，총결석광산제광상적14항기본성광특점，귀납분석전인대본구제광성인적5충관점화상관의거，제출석광산광전고배경계통，심?류?장，즉심류?배류?장적성광계통적신인식。상중만고생대태내단함분지시성광배경계통적중요지질기출，유서향동NE향5조심절기저적단렬구성단함분지적성광배경주간，이이랭수강대단렬급기분지75호단렬표현우위돌출。석광산광전구조전포、식변광화、포체분석、화탐이상，표명타문간존재첩합화우합관계，병현시출광전내존재일개유남서향북동，병유다처분지분차적배경계통。광전내음다광체분포표명NE향주단렬대、F 75급기3조분지단렬대여기재교조、사전교조、류가당조3개층정계면처위성광적유리공간，이이사전교조정계처규모최대，련속성최호，조성료완정적장적조합계통。분지주변침입암체화심부가능적지만주，시분내적주요열원，상승열광수여하삼수적장기배류시분지내성광작용중요동력궤제，분석병척제료3충배류(수향배류、쌍향배류、동혈배류)적방식화궤제。총결료감별고성광배경계통적4대표지。침대광전성광계통배류분포특점，제교료마월산배사지진가배적6처유리조광파구。
According to the distribution data of 14 mineralization points, the sketch map of the ancient ore-forming environment in Xikuangshan antimony ore-field was drawn, 14 basic mineralization characteristics in this area were summarized, and the previous 5 kinds of viewpoints on genesis as well as its relevant basis were analyzed. Through the above comprehensive analysis, the paleoenvironmental system of the Xikuangshan ore-field, deep?flow?barrier, namely the new understanding of flow?circulation?bafflestone metallogenic system was proposed. The late Paleozoic rift basin, which is inside the platform of central Hunan, is a significant geological basis of the metallogenic environment system. In this mining area, from west to east, there exist 5 NE trending faults, which deeply ingrow into the basement, constitute the backbone of the metallogenic environment. Among these faults, the Lengshuijiang fault and its branch No.75 fault are particularly prominent. In Xikuangshan ore-field, by the analysis of the structural distribution, mineralization and alteration, inclusion and the geochemical anomaly, it can be concluded that there exists a superposition and coupling relationship between them, thus demonstrating that there is a environment system extending from SW to NE with various branches of bifurcation. According to the distribution of the numerous mineral deposits, it can be concluded that the favorable space for mineralization is the top layer interface between the NE-trending main fault zone, F75 as well as its three branches and the three groups of Qiziqiao formation, Shetianqiao formation and Liujiatang formation. In addition, with the largest top boundary and the best continuity, the Shetianqiao formation composes a complete bafflestone combined system. The intrusive rocks around the basin and the deep mantle plume are possibly the main heat source. What’s more, the uprising thermal water and the infiltration water are the important driving force in the basin mineralization mechanism. Through analysis, three kinds of modes and mechanisms i.e., the circulation-vertical circulation, two-way circulation and the cave circulation, were analyzed and removed. Also, four signs for the identification of ancient metallogenic environment system were summed up. According to the distribution characteristics of the metallogenic circulation system, the six areas of favorable prospecting targets from Mayue mountain antiline to Chenjiapai were put forward.