岩石磁学方法在海洋样品研究中的多解性讨论  

Evaluations of the multi-solution for applications of rock magnetism methods on marine samples

作　　者：张强[1] 刘双迟[1] 刘建兴 刘传周[1] 李金华[3] 刘青松 ZHANG Qiang;LIU ShuangChi;LIU JianXing;LIU ChuanZhou;LI JinHua;LIU QingSong(State Key Laboratory of Lithospheric Evolution,Institute of Geology and Geophysics,Chinese Academy of Sciences,Beijing 100029,China;Key Laboratory of Marine Geology and Metallogeny,First Institute of Oceanography,Ministry of Natural Resources(MNR),Qingdao 266061,China;Key Laboratory of Earth and Planetary Physics,Institute of Geology and Geophysics,Chinese Academy of Sciences,Beijing 100029,China;Department of Ocean Science and Engineering,Southern University of Science and Technology,Shenzhen 518055,China)

机构地区：[1]中国科学院地质与地球物理研究所岩石圈演化国家重点实验室,北京100029 [2]自然资源部第一海洋研究所海洋地质与成矿作用重点实验室,青岛266061 [3]中国科学院地质与地球物理研究所地球与行星物理院重点实验室,北京100029 [4]南方科技大学海洋科学与工程系,深圳518055

出　　处：《地球物理学报》2024年第5期1891-1912,共22页Chinese Journal of Geophysics

基　　金：国家自然科学基金(41974076,42104076,41920104009);深圳科学与技术计划(KQTD20170810111725321)等联合资助。

摘　　要：岩石磁学是研究自然以及人工合成磁性矿物性质变化的应用型学科.海底岩石和海洋沉积物等海洋样品中含有不同成因及来源的磁性矿物.这些磁性矿物蕴含了全球气候变化、微生物矿化、地球动力学演化等关键地质信息.岩石磁学可以快速解析这些海洋样品中磁性矿物种类、含量、磁畴等特征的变化,为提取相关地质演化信息提供丰富的指标记录.然而,由于磁性矿物循环和海洋内部过程的固有复杂性,岩石磁学参数解译在海洋样品研究中存在多解性,在一定程度上制约了相关地质信息的深入解读.解决这一问题的关键在于对样品中载磁矿物的准确识别和量化.为此,本文首先简述了海洋样品中主要的磁性矿物类型,随后系统论述了应用岩石磁学方法评估海洋样品磁性矿物种类、含量以及磁畴状态等方面的多解性和注意事项.本文同时对岩石磁学的局限性、新兴技术和未来研究思路进行了展望.As an applied subject,the rock magnetism involves analyses of changes in magnetic properties of natural and synthetic minerals.Marine rocks and sediments contain magnetic minerals with different origins.Some key geological information,such as global climate changes,biomineralization,and earth dynamic evolution are preserved in these magnetic minerals.The variations of category,content,and domain state of magnetic minerals within marine samples can be resolved by rock magnetism,which provides abundant proxies for extracting related geological information.However,there are multi-solutions in the interpretation of rock magnetic parameters for marine samples due to the inherent complexities in magnetic mineral circulations and ocean internal processes,which prevents the well understanding of relevant geological information.The key to solving this problem is to better identify and quantify the magnetic minerals in samples.For this purpose,the main types of magnetic minerals in marine samples are described briefly,then this paper reviews the multi-solutions and matters needing attention for applications of rock magnetism in studies of category,content,and domain state of magnetic minerals in marine samples.At the same time,this paper looks forward to the prospects of limitations,emerging technologies,and future research strategy of rock magnetism.

关 键 词：岩石磁学 磁性矿物 海洋地质 海洋科学 参数多解性 

分 类 号：P318[天文地球—固体地球物理学]