海洋地质与第四纪地质2024，Vol.44Issue(2)：1-15,15.DOI:10.16562/j.cnki.0256-1492.2024013001
中国黄土磁性地层研究进展与展望
Progress and outlooks on magnetostratigraphy of Chinese loess
摘要
Abstract
The Chinese loess is one of the most important terrestrial records of the Quaternary climate changes.Magnetostratigraphy is one of the primary methods for establishing the chronological framework of the Quaternary loess.The measured positions of the Brunhes/Matuyama,Jaramillo,Olduvai,and Matuyama/Gauss polarity reversal boundaries in Chinese loess were summarized and compared against corresponding marine records.It was found that the positions of each polarity reversal boundary are inconsistent among different loess sections,and the difference spanned more than one loess-paleosol cycle.This discrepancy cannot be attributed to the lock-in effect,regional climate,sedimentation rate or different loess stratigraphic divisions.This may indicate that the polarity reversal boundaries recorded by loess deposits had probably experienced significant remagnetization,leading to a large discrepancy between loess geochronometer in magnetostratigraphy at orbital scale and marine oxygen isotope records by different researchers.In the future,studies shall focus more on the relative paleointensity(RPI)of loess to confirm the true position of each polarity reversal boundary and ultimately resolve the discrepancy in the comparison scheme between Chinese loess data and deep-sea sediment record.关键词
黄土/第四纪/磁性地层/重磁化/地磁场相对古强度Key words
Chinese loess/Quaternary/magnetostratigraphy/remagnetization/relative paleointensity分类
天文与地球科学引用本文复制引用
陈天然,肖国桥,林欣如,潘卿..中国黄土磁性地层研究进展与展望[J].海洋地质与第四纪地质,2024,44(2):1-15,15.基金项目
国家自然科学基金"基于地磁场相对古强度构建早更新世黄土年代标尺"(42272217) （42272217）
