Identification of Milankovitch Cycles and Calculation of Net Primary Productivity of Paleo-peatlands using Geophysical Logs of Coal Seams  

作　　者：SHAO Longyi WEN He GAO Xiangyu Baruch SPIRO WANG Xuetian YAN Zhiming David J.LARGE 

机构地区：[1]College of Geoscience and Surveying Engineering,China University of Mining and Technology(Beijing),Beijing 100083,China [2]Department of Earth Sciences,Natural History Museum,London SW75BD,UK [3]Institute of Architectural Engineering,Weifang University,Weifang,Shandong 261061,China [4]Faculty of Engineering,University of Nottingham,Nottingham NG72RD,UK

出　　处：《Acta Geologica Sinica(English Edition)》2022年第6期1830-1841,共12页地质学报（英文版）

基　　金：supported by the National Natural Science Foundation of China(Grant Nos.41030213 and 41572090);the Fundamental Research Funds for the Central Universities(Grant No.2022YJSDC05);the Yue Qi Scholar Project of China University of Mining and Technology(Beijing).

摘　　要：Individual coal seams formed in paleo-peatlands represent sustained periods of terrestrial carbon accumulation and a key environmental indicator attributed to this record is the rate of carbon accumulation.Determining the rate of carbon accumulation requires a measure of time contained within the coal.This study aimed to determine this rate via the identification of Milankovitch orbital cycles in the coals.The geophysical log is an ideal paleoclimate proxy and has been widely used in the study of sedimentary records using spectral analysis.Spectral analyses of geophysical log from thick coal seams can be used to identify the Milankovitch cycles and to calculate the period of the coal deposition.By considering the carbon loss during coalification,the long-term average carbon accumulation rate and net primary productivity(NPP)of paleo-peatlands in coal seams can be obtained.This review paper presents the procedures of analysis,assessment of results and interpretation of geophysical logs in determining the NPP of paleo-peatlands.

关 键 词：paleo-peatlands Milankovitch cycle carbon accumulation rate net primary productivity(NPP) coal seam 

分 类 号：P532[天文地球—古生物学与地层学] P631.81[天文地球—地质学]