小岩体叠加成矿作用在新一轮找矿突破战略行动中的应用:以勉略宁矿集区为例

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中文摘要：小岩体成(大)矿理论是汤中立院士在多年找矿实践工作过程中总结出来的重要成果.该理论以岩浆铜镍硫化物矿床为研究起点,逐渐延伸至与中酸性岩浆活动有关的热液型矿床,发展成为基性-超基性与中酸性两类岩浆并行的完整成矿理论体系.研究发现,以勉-略-宁矿集区为代表的成矿区带分布有众多两类岩浆活动的叠加区,并且两类岩浆活动导致的叠加成矿作用在该区显著.其中,煎茶岭镍钴金多金属矿床形成过程经历了早期初步的超镁铁质岩浆熔离作用使成矿元素预富集,后期花岗斑岩岩浆流体成矿作用叠加之上,最终使钴镍矿和金矿均达到了大型规模.此外,该区在白雀寺基性杂岩体中新发现的何家垭镍钴矿同样具有两类岩浆叠加成矿的特征,这为小岩体成(大)矿理论提供了新的研究方向.目前,中国新一轮找矿突破战略行动已全面开启,以Ni、Co为代表的战略性关键金属矿产仍是本轮找矿工作的重中之重,两类岩浆的小岩体叠加成(大)矿作用是Ni、Co矿形成的重要地质过程.笔者通过介绍小岩体成(大)矿理论的发展过程,并以勉-略-宁矿集区为代表,提出了两类岩浆叠加成(大)矿作用的基本内涵.在此基础上,对其找矿应用和理论研究两方面做了展望,以期助力中国新一轮找矿突破战略行动.

外文标题：Application of Superimposed Mineralization of Small Intrusions in the New Round of Prospecting Breakthrough Action:A Case Study of Mian-Lue-Ning Ore Concentration Area

外文摘要：The theory of(large)ore deposit forming in the small intrusion is an important result of decades of prospecting practice by academician Tang Zhongli.The theory started from magmatic copper-nickel sulfide de-posits,gradually extended to hydrothermal deposits associated with intermediate-acid magmatism,and devel-oped into a complete metallogenic theoretical system of basic-ultra-basic and intermediate-acid magmatism in parallel.In recent years,it has been found that the metallogenic belt represented by the Mian-Luo-Ning ore con-centration area is distributed in many superimposed areas of basic-ultra-basic and intermediate-acid magmatic activities,among which the formation process of the Jianchaling cobalt-nickel-gold polymetallic deposit experi-enced the preliminary ultramafic magmatic liquation in the earlier stage to achieve the pre-enrichment of ore-forming elements,and the later superimposed acid magmatic fluid on eventually led to both cobalt-nickel and gold mines reaching large scale.In recent years,the Hejiaya cobalt-nickel deposit was found in the Baiqisi basic complex also has the characteristics of superimposed mineralization of two kinds of magmatism,which pro-vides a new research direction for the theory of(large)ore deposit forming in the small intrusion.At present,the new round of prospecting breakthrough action has been fully launched.The strategic key metal minerals repre-sented by Co and Ni are still the top priority of the prospecting work.The superposition of small rock bodies is an important geological process in the formation of Co and Ni ores.In this paper,the development process of the theory of(large)ore deposit forming in the small intrusion is introduced,and the basic connotation of the super-imposition of two kinds of magmas into(large)ore is put forward by taking the Mian-Lue-Ning ore concentra-tion area as the representative.On this basis,the prospect of prospecting application and theoretical research is made,which is expected to support the new round of prospecting breakthrough action.

外文关键词：

the theory of(large)ore deposit forming in the small intrusionsuperimposed mineralizationMi-an-Lue-Ning ore concentration areaJianchalingBaiquesi

作者：

刘伟栋、王硕、魏翔、郭花利、刘云华、张小明、田育功

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作者单位：

长安大学地球科学与资源学院,陕西西安 710054

中国电建集团西北勘测设计研究院有限公司,陕西西安 710065

中国地质调查局发展研究中心,北京 100037

陕西省地质调查院,陕西西安 710054

自然资源陕西省卫星应用技术中心,陕西西安 710002

陕西省矿产地质调查中心,陕西西安 710068

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关键词：

小岩体成大矿叠加成矿勉略宁矿集区煎茶岭白雀寺

基金：

陕西省自然科学基金项目自然资源部东北亚矿产资源评价重点实验室开放基金中勘地球物理有限责任公司科研项目

项目编号：

2023-JC-YB-222DBK-KF-19-12220227220347

出版年：

2024

DOI：

10.12401/j.nwg.2024016

西北地质

中国地质学会西安地质矿产研究所

西北地质

CSTPCD北大核心

影响因子：0.759

ISSN：1009-6248

年,卷(期)：2024.57(5)

参考文献量25