赣南于都金银多金属矿整装勘查区1∶50 000银坑幅矿产地质图数据集

In order to develop this dataset, data were acquired comprehensively by using multiple methods such as mapping which is specific for lithology, structures and mineralized alterations, remote-sensing, geophysical/geochemical and drilling exploration. A route of 520.65 km was surveyed, with 2 047 stream sediment samples and 167 chemical analytical samples collected, and 461 km2 area interpreted based on remote-sensing data. Emphasis was placed on survey and division of early-Yanshanian metallogenic magmatite, ore-bearing formations, rock-control and ore-control structures, and mineralized alteration marks etc., so that it could be verified that the main metallogenic geological bodies for Au-Ag multi-metal ores within the area were early-Yanshanian granodiorite and that the rock-control and ore-control formations were a NE-strike thrust faultand its secondary fissures. Building on this, the 1∶ 50 000 formation and tectoni map of the Yinkeng Map-sheet was compiled, the mineral geological map dataset was established by using a digital mapping system (DGSS), a map layer property database on key formations & tectonics, geological boundaries, fractures and magmatite etc. was comprehensively compiled; the prospecting prediction model for Yinkeng-style mid-low temperature post-magmatic hydrothermal deposits in the area was improved, highlighting the causal relationship between deposits and the formations or structures in the area.为构建本数据集，研究团队采用针对岩性、构造与矿化蚀变的专项填图、遥感、物化探及钻探勘探等多种手段开展全面数据采集。实测调查路线总长520.65千米，采集水系沉积物样品2047件、化学分析样品167件，并基于遥感数据解译了461平方千米的研究区域。研究重点围绕燕山早期成矿岩浆岩、含矿地层、控岩控矿构造及矿化蚀变标志等开展调查与划分，证实研究区内金-银多金属矿的主要成矿地质体为燕山早期花岗闪长岩，控岩控矿构造为北东向逆冲断裂及其次级裂隙。在此基础上，编制了银坑幅1:5万地质与构造图，依托数字填图系统（DGSS）构建了矿产地质图数据集，并全面整合了关键地层与构造、地质界线、断裂及岩浆岩等的图层属性数据库；优化了研究区内银坑式中低温岩浆期后热液矿床的找矿预测模型，明晰了区内矿床与地层、构造之间的成因联系。