摘要
海山铁锰结壳是记录古海洋环境演化的重要载体,建立可靠且高分辨率的年代框架是解译其中信息的关键。结壳定年有多种方法,但是在定年范围、定年精度及准确性等方面仍各具局限性。地球轨道印记法及天文调谐校正技术是建立结壳高分辨率年龄框架的有效途径,为利用结壳研究万年尺度的古气候与古海洋环境演化提供了可能。首先对结壳的现有定年方法进行了简要回顾和总结,重点综述了地球轨道印记法及天文调谐校正技术,并分析了各种天文检验与调谐方法在结壳中的适用性与可靠性。认为探究结壳记录中天文信号的影响因素、选择合适的环境替代指标并高分辨率提取其空间序列等,是应用地球轨道周期印记法为海山结壳建立可靠年代框架亟待努力的方向。
Ferromanganese crusts on seamounts are critical archives of the evolutionary history of paleooceanic environmental history,and a high-resolution age framework is essential for interpreting the information therein.Several approaches are available for determining the age of crusts,however,each still has limitations in terms of the time scale,resolution,or precision.The Earth orbital pacing method in combination with astronomical tuning can provide an effective way to establish a high-resolution age framework for crusts,which offers the possibility of using crusts to study the 10000-year-scale evolution of paleo-climatic and paleo-oceanic environments.This study first briefly reviews the existing dating methods for crusts,then introduces in detail the Earth orbital pacing method combined with astronomical tuning and examines the applicability and reliability of various astronomical tests and tuning methods in crusts.The investigation of the specific influence mechanism of astronomical signals,the selection of suitable environmental proxies,and the high-resolution extraction of their spatial series are considered to be the most important directions for the establishment of a reliable age framework for crusts using the Earth orbital pacing method.
作者
郭栋山
韩喜球
范维佳
邱中炎
李谋
容雅鑫
GUO Dongshan;HAN Xiqiu;FAN Weijia;QIU Zhongyan;LI Mou;RONG Yaxin(Ocean College,Zhejiang University,Zhoushan Zhejiang 316021,China;Key Laboratory of Submarine Geosciences,Second Institute of Oceanography,Ministry of Natural Resources,Hangzhou 310012,China;School of Oceanography,Shanghai Jiao Tong University,Shanghai 200240,China)
出处
《地球科学进展》
CAS
CSCD
北大核心
2023年第2期125-136,共12页
Advances in Earth Science
基金
国家自然科学基金项目“海山结壳高分辨率地球化学记录:上新世以来中北太平洋经向环流演化”(编号:41606061)
浙江省“万人计划”杰出人才项目(编号:2018R51003)资助
作者简介
郭栋山(1998-),女,山西吕梁人,硕士研究生,主要从事多金属结壳与古海洋学研究.E-mail:22034200@zju.edu.cn;通信作者:韩喜球(1969-),女,浙江台州人,研究员,主要从事海底资源与成矿系统研究.E-mail:xqhan@sio.org.cn
