近年来,南秦岭镇安西部地区发现了棋盘沟、核桃坪、东阳等大中型钨多金属矿床.其中棋盘沟大型钨矿床以石英脉型为主,深部可见矽卡岩型矿化,前人仅对其中的石英脉型钨矿进行了年龄测试,深部的矽卡岩型钨矿尚未开展年代学研究工作.本文以棋盘沟钨矿床为研究对象,选取两类矿石中与白钨矿、辉钼矿密切共生的金云母进行 39Ar-40Ar同位素测年.结果显示,矽卡岩型矿石中金云母坪年龄为 190.1±0.6 Ma(MSWD=1.28),石英脉型矿石中金云母坪年龄为188.6±0.6 Ma(MSWD=1.42),均为早侏罗世成矿,且石英脉型钨矿成矿时间略晚于矽卡岩型钨矿.该成矿期处于南秦岭成矿带陆内碰撞造山向伸展转变的转折期,代表着一期重要的、尚未被广泛关注的印支末期的岩浆热液钨钼成矿事件,应在今后的找矿工作中予以重视.

海南富文金矿床位于华南褶皱系五指山褶皱带北缘,主要出露早白垩世鹿母湾组(K1l)含砾碎屑沉积岩.金矿体呈脉状和似层状赋存于鹿母湾组砂岩层间破碎带中.为进一步探讨富文金矿的成矿物质来源,对石英脉型矿石、赋矿围岩鹿母湾组碎屑沉积岩及岩浆岩进行主量、微量和稀土元素测试分析.结果显示:矿石与围岩地层、岩浆岩具有相似的微量元素变化趋势以及相似的稀土配分模式,预示着成矿与地层、岩浆岩关系密切.早白垩世石英闪长岩、细粒花岗岩和碎屑沉积岩均为矿体的形成提供了成矿物质,矿床类型为岩浆热液型金矿.

Jiurui ore concentration area is an important part of the middle and lower reaches of Yangtze River metallogenic belt.The study area of Pengshan polymetallic ore field is located in the south of Jiurui ore concentration area, which is rich in mineral resources, but the structural pattern is controversial.In this paper, based on the comprehensive analysis of geological and geophysical characteristics, it is proposed that Pengshan ore field is controlled by the structure of magmatic core complex, and the core of Pengshan magmatic core complex upheaval-detachment structure is composed of elliptical granitoid intrusive rock mass, which was a hidden uplift in the middle Yanshanian period and was shaped in the late Yanshanian period.The peripheral shallow sedimentary rocks are in a domed zonal distribution around the magmatic core complex.The peripheral fault zone tends to deviate from the direction of magmatic core complex and shows a shovel distribution, indicating the detachment structure characteristics.The halo type ore belt types of Pengshan ore field, with the concealed granitic body in the core as the center, the change of high temperature ore to low temperature ore occurs in the surrounding, such as arsenite（arsenopyrite）-tin ore-lead-zinc ore-fluorite ore-barite ore and so on, which is also the result of mineral enrichment along the multi-level detachment faults, and the mineralization occurs in the inner and outer contact zone of the magmatic core complex, forming skarn type, porphyry type and hydrothermal vein type Sn-Pb-Zn polymetallic deposits in the structural relaxation stage.

Pyrite is a ubiquitous metal sulfide in gold mines, and its trace element content information can reveal the composition and crystallization characteristics of related minerals and fluids when the minerals are formed. Therefore, pyrite and trace elements related to gold mines at different stages The information can be used to predict the type of deposit. In addition, the related research has a long history, and a large amount of research materials have been accumulated. However, due to the limitations of research ideas and methods, traditional methods often have problems of no solution or multiple solutions. With the development and promotion of big data ideas, researchers have tried to use machine learning algorithms to solve such problems, and have achieved good results. In this study, based on the idea of deep learning, adata set of trace elements of pyrite was established and conducted in-depth research. By means of “component data visualization” and “data enhancement”, it solved the problems encountered by predecessors when using deep learning methods for such classification tasks. The resulting data imbalance problem and the problem that the convolutional neural network cannot directly read the data. This paper compares and analyzes the accuracy and effect of gold ore type classification task using pyrite trace element composition data based on four convolutional neural network models（Mobilenet V2, Resnet50, Vgg16 and VIT）. It is found that the convolutional neural network algorithm can be based on The pyrite composition data can perform more accurate classification tasks for different types of gold deposits. This method has higher accuracy and generalization ability than the traditional graphical method. By predicting the type of gold deposits, it can save costs for prospecting exploration and deep prediction work, and also provide deep learning for the application and promotion of geological and mineral resources research. The new idea has certain promotion value.