现代地质2025，Vol.39Issue(3)：715-727,13.DOI:10.19657/j.geoscience.1000-8527.2025.022
海南岛西部抱板杂岩中伟晶岩矿物学与全岩地球化学特征及成因意义
Mineralogy and Whole Rock Geochemical Characteristics and Genetic Implications of Pegmatites in the Baoban Complex,Western Hainan Island
摘要
Abstract
In western Hainan Island,pegmatites were widely distributed in the Baoban Complex.The geochem-ical research of pegmatites has not been carried out,and the types,genesis and rare metal metallogenic poten-tial are still unclear.Based on field geological characteristics and microscopic observations,major elements,trace elements and rare earth elements of whole rock and single minerals(mica,feldspar)and feldspar X-ray powder diffraction were carried out on pegmatites in the Baoban complex.The type of pegmatites is classified,the metallogenic potential of pegmatites is analyzed,and its genetic relationship between pegmatites and adja-cent granites are discussed.The pegmatites belong to the muscovite albite pegmatite,which have high silicon and aluminum content,low calcium and magnesium content and peraluminous.Trace elements are generally en-riched in large ion lithophile elements,and depleted in high field strength elements.Light rare earth elements are relatively enriched,while heavy rare earth elements are relatively depleted.Electron Probe Micro-Analysis shows that the mica in the pegmatites is mainly muscovite,and the feldspar is mainly albite,the second oligo-clase and microcline.The pegmatites have a low degree of evolution.The pegmatites are classified as the allan-ite-monazite type of muscovite-rare-element-REE(REL-REE)subclass.The content of rare metals in pegmatites is low,and the cell volume of microcline is smaller than that of rubidium-rich pegmatite.The pegmatites do not have rare metal mineralization potential.关键词
花岗伟晶岩/地球化学/抱板杂岩/海南岛Key words
granite pegmatite/geochemistry/Baoban Complex/Hainan Island分类
天文与地球科学引用本文复制引用
恽虎,官军,王成,林世莉,费光春..海南岛西部抱板杂岩中伟晶岩矿物学与全岩地球化学特征及成因意义[J].现代地质,2025,39(3):715-727,13.基金项目
海南省海洋地质资源与环境重点实验室开放课题(22-HNHYDZZYHJKF021). （22-HNHYDZZYHJKF021）
