ESR chronology of the Quaternary sedimentary sequence of the Shinaimiao borehole in Hebi City, Henan Province, China

IF 1.7 2区地球科学 Q3 GEOGRAPHY, PHYSICAL

Quaternary Geochronology Pub Date : 2024-08-26 DOI:10.1016/j.quageo.2024.101616

Hao Ji , Zhong-shan Shen , Chun-Ru Liu , Xiong-Nan Huang , Xiao-Ping Yang , Chuan-Yi Wei , Xin-Xiu Li , Qing Zhou , Gong-Ming Yin

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Abstract

It is very important to distinguish the strata of different periods in the Quaternary period, especially the Middle Pleistocene and Late Pleistocene strata, for stratigraphic division, depositional environmental analysis and climate evolution analysis. In this study, the Shinaimiao (SNM) borehole sequence in Hebi City, Henan Province (China) was established by both electron spin resonance (ESR) and magnetostratigraphy methods. Both Al (eighteen samples) and Ti-Li (eight out of the eighteen samples) centers were measured using the Multiple Aliquots Additive Dose (MAAD) method. In addition, hundreds of magnetostratigraphic samples were measured to determine the precise position of the Matuyama/Brunhes (M/B) boundary. The results show that: (1) The equivalent dose (D_E) values of the Al and Ti-Li centers are consistent within the error range, demonstrating that the Multiple Center (MC) approach has worked. (2) The ESR dating results are consistent with the order of sedimentation (the ages get older with depths) and with magnetostratigraphic results of the B/M boundary within the error range, indicating that the ESR ages obtained from the Al and Ti-Li centers are reliable in this study. (3) By comprehensive analysis of the dating results and lithology characteristics, the stratigraphic ages of the SNM borehole with a depth of 126.93 m spans from Neogene to Holocene, but part of the early Pleistocene strata are missing.

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河南省鹤壁市石乃庙钻孔第四纪沉积序列的ESR年代学研究

区分第四纪不同时期的地层，尤其是中更新世和晚更新世地层，对于地层划分、沉积环境分析和气候演化分析具有十分重要的意义。本研究采用电子自旋共振（ESR）和磁地层学方法建立了河南省鹤壁市石乃庙钻孔序列。采用多样品加剂量（MAAD）法测量了铝中心（18 个样品）和钛锂中心（18 个样品中的 8 个）。此外，还测量了数百个磁地层样本，以确定松山/布鲁内斯（M/B）边界的精确位置。结果表明(1) 铝中心和钛-李中心的等效剂量（DE）值在误差范围内是一致的，表明多中心（MC）方法是有效的。(2) 在误差范围内，ESR 测年结果与沉积顺序一致（年龄随深度增加而变老），与 B/M 边界的磁地层学结果一致，表明本研究从 Al 和 Ti-Li 中心获得的 ESR 年龄是可靠的。(3）通过对测年结果和岩性特征的综合分析，126.93 m 深的 SNM 钻孔的地层年龄跨度为新近纪至全新世，但缺少部分早更新世地层。

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来源期刊

Quaternary Geochronology 地学-地球化学与地球物理

CiteScore

4.40

自引率

22.20%

发文量

130

审稿时长

20 weeks

期刊介绍： Quaternary Geochronology is an international journal devoted to the publication of the highest-quality, peer-reviewed articles on all aspects of dating methods applicable to the Quaternary Period - the last 2.6 million years of Earth history. Reliable ages are fundamental to place changes in climates, landscapes, flora and fauna - including the evolution and ecological impact of humans - in their correct temporal sequence, and to understand the tempo and mode of geological and biological processes.