摘要
锂是现代工业中重要的战略金属。雪凤岭伟晶岩型锂矿床是继白龙山锂矿后在西昆仑成矿带发现的又一个大型锂矿床。为探究雪凤岭锂矿床的成矿年龄和成矿模式,深入了解西昆仑成矿带的成矿规律,本文测定了雪凤岭锂矿床铌钽铁矿和锡石的LA-ICP-MS U-Pb年龄。结果表明,铌钽铁矿(含高U和低Th)和锡石的加权平均年龄分别为208.2±2.1Ma和208±15Ma,二者在误差范围内一致,因此代表了雪凤岭锂矿床的成矿年龄,即该矿床与西昆仑地区其他锂矿床均形成于晚三叠世。区域上,西昆仑地区与松潘-甘孜地区的伟晶岩型锂矿床成矿年代相近,其形成均与三叠纪花岗岩密切相关,即它们共同构成了2800km长的古特提斯锂成矿带。本文认为黑石北湖、云雾岭和木孜塔格地区是古特提斯成矿带下一步锂矿找矿突破的远景区。
Lithium is one of the most important strategic metals in modern industries.The Xuefengling pegmatite type lithium deposit is another large lithium deposit discovered in West Kunlun-Karakoram after the Bailongshan lithium deposit.In order to constrain the metallogenic age and metallogenic model of the deposit,and deeply understand the metallogenic regularity of the West Kunlun metallogenic belt,the LA-ICP-MS U-Pb age of columbite-(Fe)and cassiterite in the Xuefengling lithium deposit are determined.The weighted average ages of the columbite-(Fe)(containing high U and low Th)is 208.2±2.1Ma,while that of the cassiterite is 208±15Ma,and they are consistent with each other within acceptable errors,representing the metallogenic age of pegmatite vein.Compared with those deposits mentioned above,the Xuefengling lithium deposit was also formed in the Late Triassic.Regionally,the metallogenic age of pegmatite lithium deposits in the West Kunlun area is similar to that in Songpan-Ganzi area which is closely related to the Triassic granites in these areas.They form a 2800-km-long Paleo-Thethys lithium metallogenic belt.The Heishibeihu,Yunwuling and Muzitage areas are the prospective areas for the next breakthrough in lithium prospecting in the Paleotetian metallogenic belt.
作者
白洪阳
王核
闫庆贺
王赛蒙
王振宏
张晓宇
高昊
秦艳
BAI HongYang;WANG He;YAN QinHe;WANG SaiMeng;WANG ZhengHong;ZHANG XiaoYu;GAO Hao;QIN Yan(CAS Key Laboratory of Mineralogy and Metallogeny,Guangzhou Institute of Geochemistry,Chinese Academy of Sciences,Guangzhou 510640,China;University of Chinese Academy of Sciences,Beijing 100049,China;Guangdong Nonferrous Metals Geological Exploration Institution,Guangzhou 510089,China)
出处
《岩石学报》
SCIE
EI
CAS
CSCD
北大核心
2022年第7期2139-2152,共14页
Acta Petrologica Sinica
基金
国家重点研发项目(2019YFC0605201)
第二次青藏高原综合科学考察(2019QZKK0802)
国家自然科学基金项目(91962215、41972088)
新疆维吾尔自治区科技重大专项、重点研发专项(2019B00011、2020A03005)联合资助.
