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DATING STUDY ON THE GROWTH GENERATIONS WITHIN THE POLYMETALLIC NODULE
Author(s): 
Pages: 65-73
Year: Issue:  2
Journal: MARINE GEOLOGY & QUATERNARY GEOLOGY

Keyword:  多金属结核生长层组微体古生物年代太平洋中部;
Abstract: 根据结构构造、矿物组分、微体古生物组合不同,多金属结核内部可划分为三个生长层组,从内到外依次为:第Ⅰ生长层组、第Ⅱ生长层组、第Ⅲ生长层组.运用古生物地层学方法,对其中微体古生物化石(硅藻、超微、放射虫)进行综合分析,确定三个生长层组的生长年代为:第Ⅰ生长层组形成年代为渐新世到早中新世,其顶界年龄不晚于18Ma,第Ⅱ生长层组形成年代为早中新世末期到上新世早期,第Ⅲ生长层组时代为上新世早期到第四纪.
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