鲁中隆起区稀土矿成矿地质特征及找矿前景分析  

Analysis on Metallogenic Geological Characteristics and Prospecting Prospect of Rare Earth in Central Luzhong Uplift Area

作　　者：王继芳[1] 安茂国 徐然[1] 支成龙 黄坤朋[1] 尚振 朱宁[1] WANG Jifang;AN Maoguo;XU Ran;ZHI Chenglong;HUANG Kunpeng;SHANG Zhen;ZHU Ning(Lunan Geo-engineering Exploration Institute(No.2 Geological Brigade of Shandong Provincial Bureau of Geology and Mineral Resources),Shandong Yanzhou 272100,China)

机构地区：[1]山东省鲁南地质工程勘察院(山东省地质矿产勘查开发局第二地质大队),山东兖州272100

出　　处：《山东国土资源》2022年第11期1-14,共14页Shandong Land and Resources

基　　金：山东省地质矿产勘查开发局勘查项目,山东省稀土矿资源调查评价(KC201908);山东省自然资源厅2020年省级地质勘查项目,山东省兰陵县龙宝山地区稀土矿调查评价(鲁勘字〔2020〕33号);山东省地质矿产勘查开发局2020年度找矿突破项目,山东省郗山-龙宝山地区岩浆岩型稀土矿资源调查评价(202018);山东省科技厅重大科技创新工程项目(2017CXGC1603)。

摘　　要：鲁中隆起区位于沂沭断裂带西侧,区内与稀土成矿有关的岩浆岩和断裂构造发育,圈定多处放射性异常,La、Y等地球化学异常和独居石、钍石等重砂异常,具有较好的稀土矿成矿地质条件。区内已发现稀土矿床(点)6处,矿化点10处,显示了较大的找矿潜力。区内稀土矿成矿类型主要为岩浆热液型,典型稀土矿为郗山稀土矿;有些矿化点成矿类型为伟晶岩型和冲洪积型。成矿期主要为中生代白垩纪,有些矿化点成矿期为新太古代、中奥陶纪和第四纪。区内内生稀土矿主要控矿因素为与稀土矿成因相关的岩浆岩和构造。与稀土矿成因相关的岩浆岩主要为中生代的郗山、沙沟、关帝庙、鹿野、腰关、崔家沟、东马山单元和古生代常马庄单元。本文总结了区内稀土矿成矿规律,划分成矿远景区3个;划分找矿靶区11个,分析了今后区内找矿方向和工作方法,以期实现稀土矿成矿新突破。The Central Luzhong uplift area is located in the west of Yishu fault zone.Magmatic rocks related to rare earth mineralization and fault structures developed well in the area.There are many radioactive anomalies and geochemical anomalies,such as La and Y,and heavy sand anomalies,such as monazite and thorium.They all have good geological conditions for rare earth mineralization.6 rare earth deposits(points)and 10 mineralization points have been found in the area with great prospecting potential.The metallogenic type of rare earth deposits in the area is magmatic hydrothermal type,and typical rare earth deposit is Xishan rare earth deposit.Some mineralization points are pegmatite type and alluvial-diluvial type.The mineralization period is mainly cretaceous of Mesozoic,and some mineralization points are Neoarchean,middle Ordovician and Quaternary.The main controlling factors of endogenous rare earth deposits in the area are magmatic rocks and tectonics related to the origin of rare earth deposits.The magmatic rocks related to ree genesis are mainly Xishan,Shagou,Guandiiiao,Luye,Yaoguan,Cuijiagou,Dongmashan unit and Paleozoic Changmazhuang unit in Mesozoic.In this paper,metallogenic regularity of rare earth deposits in the area has been summarized,and three metallogenic potential areas and 11 prospecting target areas have been divided.The prospecting direction and working methods in the area in the future have been analyzed in order to achieve a new breakthrough in rare earth ore formation.

关 键 词：稀土矿 地质特征 找矿分析 鲁中隆起区 

分 类 号：P618.7[天文地球—矿床学]