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杨佐怀(1986-),男,甘肃庆阳人,高级工程师,从事战略性矿产调查研究工作。cgs-yzh@foxmail.com |
收稿日期: 2022-09-28
修回日期: 2022-12-09
网络出版日期: 2023-04-27
基金资助
中国地质调查局二级项目“塔里木南缘边境(省界)线100公里内战略性矿产规划支撑调查”(ZD20220229)
Study on Rare Earth Mineralization Characteristics of Kuzigan Alkaline Complex in West Kunlun
Received date: 2022-09-28
Revised date: 2022-12-09
Online published: 2023-04-27
西昆仑塔什库尔干一带苦子干碱性杂岩体是区内最大的新生代碱性杂岩体,关于该岩体与稀土成矿的关系尚不明确。通过野外实地调查和镜下鉴定,对苦子干碱性杂岩体的地质背景进行了调查,并利用主微量元素分析方法对岩石地球化学特征进行了研究。结果表明:苦子干碱性杂岩体各类岩石总体稀土元素含量较高,富集LREE,具有较好的稀土矿找矿前景;苦子干碱性杂岩体主要呈Ce、Y富集特征,且与F元素正相关;赋矿(化)岩石为中粒霓辉正长岩,含萤石、磷灰石和独居石等副矿物,围岩为中粒石英正长岩,二者呈渐变接触,接触界线不明显。
杨佐怀 , 郭艳琴 , 陆诗超 , 段留安 , 李峥伟 , 黎小勇 , 魏彦强 , 苏飞 , 杨国良 . 西昆仑苦子干碱性杂岩体稀土成矿特征研究[J]. 黄金科学技术, 2023 , 31(2) : 262 -270 . DOI: 10.11872/j.issn.1005-2518.2023.02.129
Kuzigan alkaline intrusive complex is the largest Cenozoic alkaline complex in the Taxkorgan area of West Kunlun.In recent years,the research on the Kuzigan alkaline complex has mainly focused on the formation age of the rock mass and the source of magmatic materials,but little research has been done on its rare earth mineralization characteristics.Based on the geological background and petrochemical characteristics of Kuzigan complex,the metallogenic characteristics of this type of rare earth ore in Kuzigan area were discussed by means of field investigation,microscopic identification and main trace element analysis.Three samples were taken from aegirine syenite and one contrast sample was taken from syenogranite.The results show that the total rare earth content of all kinds of rocks in the alkali metasomatic rare earth ore of Kuzigan is rich,mainly manifested as Ce and Y enrichment,and positively correlated with F.The REE content of syenite varies from 888.05×10-6 to 1 320.17×10-6,and it is enriched in light rare earth elements(LREE/HREE=13.54~19.65).The curves in the REE chondrite normalized diagram is generally right-leaning,and the differentiation degree of LREE and HREE is not large as a whole.No obvious anomalies of Eu and Ce are found,which has the common characteristics of alkaline syenite.The range of LREE fractionation parameter (La/Sm)N is 3.80 to 26.75.The HREE fractionation degree parameter (Gd/Yb)N varies from 2.94 to 7.98,indicating that the syenite has slight fractionation on both light and heavy rare earths,but the fractionation degree of light rare earth is greater than that of heavy rare earth.The ore-bearing rock of rare earth ore(mineralization) in the Kuzigan alkaline complex is medium-grained aegirine syenite,which contains accessory minerals such as fluorite,apatite and monazite,and is located near the internal contact zone with medium-grained quartz syenite,the two are in gradual contact.The Kuzigan alkaline complex has high REE content and strong LREE enrichment,which is mainly characterized by enrichment of light rare earth elements such as Ce and Y,and is positively correlated with F.It has the prospect of finding alkaline metasomatic rare earth deposits,and should focus on strong potassic,aegirine and carbonate alteration zones.
自然资源部地质矿产科学数据中心成立
2023年4月6日,自然资源部地质矿产科学数据中心在中国地质调查局发展研究中心(全国地质资料馆)正式成立。
为贯彻落实党中央、国务院对科学数据管理的要求,进一步加强和规范自然资源科学数据管理,促进开放共享,自然资源部着力构建科学数据管理运行机制,在自然资源领域推动建设一批科学数据中心。
部地质矿产科学数据中心的主要职责是建成完善的地质矿产科学数据汇交、安全保管、分析挖掘、共享服务等管理体系和业务技术体系,提升科学数据的治理能力;围绕国家能源资源安全保障和重大需求,全面做好地质矿产科学数据的开放共享,向社会提供便捷的科学数据服务,提升科学数据共享服务能力;建立完善各类地质矿产科学专题数据库,开展数据挖掘、产品开发、知识发现等增值服务,推进开放实验室建设和行业学术交流,成为国内权威的地质矿产科学数据创新应用与服务平台。
据悉,下一步,该中心将坚持“开放协作、合作共建、资源共享、科技引领”的原则,坚持业务工作与上级要求对接、与科研业务需求对接,重点推进五方面工作:一是开展自然资源部系统形成的地质矿产科学数据摸底调查,摸清地质矿产科学数据的数量、管理和汇交状况,提出数据管理方案;二是制定地质矿产科学数据管理的系列制度,包括科学数据中心的运行机制、数据汇交制度、共享服务管理办法等;三是建设中心的运行和管理系统平台,实现地质矿产科学数据汇交及网络化共享服务;四是积极开展地质矿产科学数据的开发和共享利用,围绕国家重大需求推动相关数据的汇聚,并开发精准服务产品,不断提升科学数据服务效能;五是跟踪国内外数据管理与服务最新进展,加强科技创新和国际交流,加大与科研院所、高校、企业的合作力度,推进地质矿产科学数据的有序开放和跨行业共享。
http://www.goldsci.ac.cn/article/2023/1005-2518/1005-2518-2023-31-2-262.shtml
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