盐湖型富钾硝酸盐矿床钼同位素地球化学特征应用潜力  

Discussion on application potential of molybdenum isotope geochemistry in salt lake type K-rich nitrate deposits

作　　者：宋建国 张燕虎 杨磊 周兆明 Song Jianguo;Zhang Yanhu;Yang Lei;Zhou Zhaoming(The Fourth Institute of Geological and Mineral Exploration of Gansu Provincial Bureauof Geology and Mineral Resources,Jiuquan,Gansu,735000,China)

机构地区：[1]甘肃省地质矿产勘查开发局第四地质矿产勘查院,甘肃酒泉735000

出　　处：《化工矿产地质》2023年第1期17-23,共7页Geology of Chemical Minerals

摘　　要：随着同位素分析测试技术的发展与精进,非传统稳定同位素地球化学得以快速发展。钼同位素在指示物源、沉积环境、约束成矿条件、解释元素循环等方面的研究中逐渐发展成熟,钼同位素地球化学将会在地球科学、生命与环境科学研究中发挥其独特的应用潜力。盐湖沉积演化过程中明显富集Mo元素,硝酸盐型盐湖钼同位素的地球化学特征及地质意义尚未见报道。新疆具有独特的多类型硝酸盐矿床,因硝酸盐来源与富集成矿机制复杂而对其形成存有争议。本文简述了硝酸盐矿床稳定同位素的应用与硝酸盐物源、富集成矿机制复杂性的原因,并探讨了钼同位素在盐湖型富钾硝酸盐矿床中的应用潜力。钼同位素地球化学特征及生物地化效应在乌勇布拉克盐湖型富钾硝酸盐矿床中的应用研究有助于进一步深入认识微生物硝化-反硝化作用对矿床硝酸盐的影响与贡献,同时也可为硝酸盐富集成矿过程提供可靠的同位素数据的支持。With the development of isotopic analysis and testing technology,non-traditional stable isotope geochemistry has developed rapidly.Molybdenum isotope has been gradually developed and matured in the study of indicating source and sedimentary environment,constraining metallogenic conditions and interpreting element circulation.Molybdenum isotope geochemistry will play unique application potential in the process of studying geoscience,life and environmental science.Mo is enriched in sedimentary evolution of salt lake,and the geochemical characteristics and geological significance of Mo isotopes in nitrate salt lake have not been reported.There are unique and multi-type nitrate deposits in Xinjiang,but the origin and enrichment mechanism of nitrates are complex,so the formation of nitrates is controversial.In this paper,we briefly described the application of stable isotopes in nitrate deposits and the reasons for the complexity of nitrate origin and mineralization mechanism,discussed the potential application of molybdenum isotope in K-rich nitrate deposits of salt lake in Xinjiang.The formation of nitrate due to the complex mechanism of nitrate source and enrichment mineralization is controversial.This paper briefly describes the application of stable isotopes in nitrate deposits and the reasons for the complexity of nitrate source and enrichment mechanism,the application potential of molybdenum isotope in salt lake type k-rich nitrate deposit was discussed.The application of molybdenum isotope geochemical characteristics and biogeochemical effects in K-rich nitrate deposit of Wuyongbulake salt lake will help us to further understand the influence and contribution of microbial nitrification or denitrification on the nitrate deposit,it can also provide reliable isotopic data support for the enrichment and mineralization of nitrate.

关 键 词：富钾盐湖 硝酸盐矿床 钼同位素 地化特征 应用潜力 

分 类 号：P619.211[天文地球—矿床学] P59[天文地球—地质学]