CAJ | 학술논문

煎茶岭大型金矿床的地球化学特征表明,超基性岩体是金的主要矿源层,成岩物质具幔源特点,金成矿过程与早期构造岩浆热液作用及后期构造热液蚀变作用有关,成矿流体为混合岩浆热液,晚期中酸性岩浆水是引起超基性岩蚀变变质的主要流体成分,金矿化过程中的硫是多期次、多来源.初步认为该矿床为造山型金矿床,成矿可分为两期,即晋宁晚期-加里东期和印支-燕山期,以后者为主,其主成矿期对应于区域上的后碰撞造山过程,陆内挤压造山是其成矿地球动力学背景.超基性岩体的褪化蚀变、F_1~(45)断裂的长期活动及与其大角度相交的上、下盘次级断裂、裂隙系统与灯影组白云岩是煎茶岭金矿床的主要控矿因素.结合该区找矿实践,认为F_1~(45)断裂带、Au-Ag-As-Hg-B等组合化探异常和蚀变白云岩为其重要的找矿标志.煎茶岭地区仍具有较好的找矿潜力,这对于指导该地区进一步勘查并取得找矿突破具有重要的现实意义.
전다령대형금광상적지구화학특정표명,초기성암체시금적주요광원층,성암물질구만원특점,금성광과정여조기구조암장열액작용급후기구조열액식변작용유관,성광류체위혼합암장열액,만기중산성암장수시인기초기성암식변변질적주요류체성분,금광화과정중적류시다기차、다래원.초보인위해광상위조산형금광상,성광가분위량기,즉진저만기-가리동기화인지-연산기,이후자위주,기주성광기대응우구역상적후팽당조산과정,륙내제압조산시기성광지구동역학배경.초기성암체적퇴화식변、F_1~(45)단렬적장기활동급여기대각도상교적상、하반차급단렬、렬극계통여등영조백운암시전다령금광상적주요공광인소.결합해구조광실천,인위F_1~(45)단렬대、Au-Ag-As-Hg-B등조합화탐이상화식변백운암위기중요적조광표지.전다령지구잉구유교호적조광잠력,저대우지도해지구진일보감사병취득조광돌파구유중요적현실의의.
The geochemical characteristics of Jianchaling gold ore deposit indicate that the Jianchaling ultramafic intrusion is the main source of gold and rock-forming substances displays the mantle-derived feature. The gold metallogenesis is related to early structure magmatic hydrothermal process and late structure hydrothermal alteration. Ore-forming fluid was hybrid magmatic hydrothermal one and the late intermediate-acid magmatic water was the main composition which is responsible for alteration metamorphossim of the ultramafic intrusion. The sulphur of gold mineralization was multiphase and polysources. The gold deposit should belong to orogenic-type deposit; its metallogenic process can be diviede into two periods, Late Jinning-Caledonian and Indosinian-Yanshanian, with the latter being dominating one. The main ore-forming time corresponds to the regional postcollisional orogeny. Therefore, intracontinental compressional orogeny formed its metallogenic geodynamics setting. Retrograde alteration of ultramafic intrusion, long-term activity of F_1~(45) fault and subsidiary fractures which intersect F_1~(45) at large-angles in its upper and heading side and its fissure system, and Dengying Group dolomite are main ore-controlled factors. Combined with exploration practice in this area, it is proposed that the fault belt, Au-Ag-As-Hg-B geochemical exploration anomaly, as well as alterated dolomite are important indicators for prospecting. Therefore, the Jianchaling area is potential for mineral exploration, and this study has important realistic signification to guide prospecting and get breakthrough in the area.