CAJ | 학술논문

对 CSH1岩心全样沉积物样品进行元素地球化学分析，揭示了过去88 ka 冲绳海槽北部沉积物成分、水动力条件及陆源碎屑物质源区风化历史。冲绳海槽北部碎屑沉积物母岩主要以长英质为主，在 MIS 1期沉积物存在大量火山源物质。过去88 ka，沉积物源区风化程度较弱，但是自冰消期以来有逐渐增强的趋势。沉积物 Zr／Nb 比值表明在 MIS 1期和 MIS 5．1期水动力较为强烈，这与黑潮增强的时间一致，可能是指示黑潮强度的一个指标。冲绳海槽北部陆坡沉积物陆源碎屑贡献在低海平面时期显著增加，而在 MIS 1和 MIS 5．1期生源贡献显著增加。冲绳海槽北部沉积物成分变化明显受到黑潮和入海径流的调节，实际上受海平面和东亚季风的制约。
대 CSH1암심전양침적물양품진행원소지구화학분석，게시료과거88 ka 충승해조북부침적물성분、수동력조건급륙원쇄설물질원구풍화역사。충승해조북부쇄설침적물모암주요이장영질위주，재 MIS 1기침적물존재대량화산원물질。과거88 ka，침적물원구풍화정도교약，단시자빙소기이래유축점증강적추세。침적물 Zr／Nb 비치표명재 MIS 1기화 MIS 5．1기수동력교위강렬，저여흑조증강적시간일치，가능시지시흑조강도적일개지표。충승해조북부륙파침적물륙원쇄설공헌재저해평면시기현저증가，이재 MIS 1화 MIS 5．1기생원공헌현저증가。충승해조북부침적물성분변화명현수도흑조화입해경류적조절，실제상수해평면화동아계풍적제약。
Based on the analysis of major and minor elements in bulk sediments of core CSH1,we reconstructed the changes of sediment components,hydrodynamic conditions and weathering history in the provenance of terrigenous materials over the last 88 ka in the northern Okinawa Trough .The results show that the lithology of parent rock of the terrigenous detritus is felsic,and the volcanic detritus contributes significantly to the sediment components during MIS 1.Over the last 88 ka,the weathering in the provenance of terrigenous detribus is weak (WIP<60%) but gradually increases since the last deglacial period.The Zr/Nb ratio indicates the hydrodynamic condition was much stronger during MIS 1 and MIS 5.1 in the northern Okinawa trough,a potential indicator of the strength of the Kuroshio,which occurs synchronically with the intensified Kuroshio.The terrigenous contributions significant-ly increased during lower sea level,while the biogenic contributions showed high values during MIS 1 and MIS 5.1. The sediment components are regulated by the Kuroshio and the runoff in the northern Okinawa Trough ,which in fact are controlled by sea level and the East Asian Monsoon.