陕西省地质调查院:陕西省白浪幅(I49E017012)1∶50000地质图数据集

陕西省白浪幅（I49E017012）1∶50 000区域地质图数据库在充分利用前任区域地质调查成果的基础上, 根据《1∶50000区域地质调查技术要求》和《数字地质图空间数据库》技术标准, 采用数字地质调查系统(DGSS), 结合遥感、物化探、路线地质调查和实测剖面等多种手段综合修测而成, 是南秦岭地区具有重要参考意义的成果图件之一。在系统查明穹窿构造特征及物质组成基础上，利用“线条性质+粗细”和“面色色系－颜色－花纹”图面表达方式，提高了图面可读性。识别出Rodinia超大陆聚合在该区的岩浆响应—新元古代早期的埃达克质岩，为限定松树沟洋盆闭合后南－北秦岭碰撞事件提供了有力约束。通过变质岩岩石学研究及地层对比，将湘河梳洗楼-月亮湾一带原划耀岭河一段石墨片（麻）岩厘定为陡岭岩群，并在其中圈定石墨矿带12条，提交新发现晶质石墨矿产地2处，资源远景具超大型规模。确立了陕西省新的晶质石墨矿含矿层位，拓宽了陕西省晶质石墨矿的找矿方向。

The 1:50000 regional geological map database of Bailang Sheet (I49E017012), Shaanxi Province was compiled through comprehensive revision based on fully leveraging prior regional geological survey findings, in accordance with the "Technical Requirements for 1:50000 Regional Geological Survey" and "Technical Standard for Spatial Database of Digital Geological Maps", using the Digital Geological Survey System (DGSS) and integrating multiple methods including remote sensing, geophysical and geochemical surveys, route geological surveys and measured sections. It is one of the key reference map products in the Southern Qinling Mountains region. Based on systematic clarification of the characteristics and material composition of dome structures, the map's readability has been enhanced by adopting the expression modes of "line property + thickness" and "background color system - hue - pattern". Magmatic responses to the assembly of the Rodinia Supercontinent in this region—early Neoproterozoic adakitic rocks—have been identified, providing robust constraints for defining the south-north Qinling collision event following the closure of the Songshugou Ocean Basin. Through metamorphic petrological studies and stratigraphic correlation, the originally mapped Yaolinghe Formation 1 graphite schist (gneiss) in the Xianghe Shuxilou-Yueliangwan area has been reclassified into the Douling Group, and 12 graphite ore belts have been delineated within it. Two newly discovered crystalline graphite ore occurrences have been submitted, with super-large-scale resource potential. A new ore-bearing horizon for crystalline graphite deposits in Shaanxi Province has been established, broadening the prospecting direction for crystalline graphite deposits across the province.