晚第四纪地球磁场强度变化的沉积记录及其对宇宙成因核素(^(14)C和^(10)Be)的影响

LATE QUATERNARY GEOMAGNETIC INTENSITY VARIATIONS:SEDIMENTARY RECORDS AND IMPACT ON PRODUCTION OF COSMOGENIC ISOTOPES (14C AND 10Be)

地球磁场强度变化的沉积记录是过去十几年内环境磁学的研究热点之一，本文综述了其理论基础和研究方法，归纳了适合于进行这种研究的沉积物应满足的若干条标准以及其沉积记录可靠性的检验标准，介绍了过去２００ｋａ地磁场强度相对变化的连续沉积记录，还评述了晚第四纪地球磁场强度变化对宇宙成因核素１４Ｃ和１０Ｂｅ的控制作用。

オesearch on sedimentary record of geomagnetic intensity variation,which is one of study focuses of environmental magnetism for the last 10odd years,is reviewed in this paper with emphases on its theory foundation and research methods.In addition,a set of criteria for sediments to be considered suitable for this research and some criteria to evaluate the reliability of sedimentary relative paleointensity records are summed up,continuous sedimentary records of relative variations in geomagnetic intensity during the past 200 000 years are presented,and the significant influences of geomagnetic intensity variations on production of cosmogenic isotopes (14C and 10Be)are analysed.