川西九龙黄牛坪铍矿床地质特征及找矿潜力

通过在川西九龙三岔河地区开展综合地质调查工作,发现该区桥棚子花岗岩体与三叠系围岩接触带及其附近具有较好的铍矿化,初步圈定了4条铍矿体,主要沿岩体接触带呈NNW向延伸,BeO品位最高可达0.698%,初步预测BeO资源量可达大型规模,矿石矿物主要为绿柱石,围岩蚀变以电气石化为主。花岗岩体顶部是含铍伟晶岩的重要成矿部位,野外可采用遥感先行的技术手段查找异常,再对遥感异常开展大比例尺追索,进一步采用工程手段进行验证。结果表明,九龙地区具有明显锂、铍异常,且与地质体套合度高。研究区外围东部发现稀有金属矿化显著的打枪沟锂铍矿床,南部乌拉溪地区追索到大量含锂辉石矿化伟晶岩转石,表明该区具有良好的稀有金属成矿条件及找矿潜力。

Geological characteristics and prospecting potential of Huangniuping beryllium deposit in Jiulong of West Sichuan

Through the comprehensive geological survey in Sanchahe area of Jiulong, Western Sichuan, the authors found that there was a good beryllium mineralization belt near the contact zone between Qiaopengzi rock mass and Triassic surrounding rocks. Four beryllium ore bodies were initially identified in NNW direction, extending along the contact zone of the rock mass. BeO grade can reach up to 0.698%, and the preliminarily predicted BeO resources can be of large scale. The ore mineral is mainly beryl, and the main surrounding rock alteration is tourmaline alteration. The top of the granite mass is also an important metallogenic location of the pegmatite-bearing rock. Remote sensing technology was used in the field of ore prospecting to recognize anomalies, and then large-scale recourse on remote sensing anomalies were carried out. Besides, further engineering methods were used for verification. The results show that the lithium and beryllium anomalies of water sediments in Jiulong area are high, with high matching degree of regional geological conditions. On the periphery of the study area, there is Daqianggou lithium-beryllium deposit in the east, and in the south a large number of spodumene-bearing pegmatites were traced in Wulaxi area, indicating that this area has good metallogenic conditions and prospecting potential.