Detrital zircon U–Pb ages and Hf isotope analyses of modern and Quaternary sediments in China: A new dataset with preliminary analysis

IF 3.3 3区 地球科学 Q2 GEOSCIENCES, MULTIDISCIPLINARY
Xiyun Chen, Ping Wang, Hongsen Xie, Longchen Zhu, Xia Liao, Xinggong Kong
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引用次数: 0

Abstract

Developments of detrital zircon geochronology have resulted in an explosion of publications that report or discuss detrital zircon data. Combined detrital zircon U–Pb ages with Hf isotope analyses from modern and Quaternary sediments have been widely carried out with the aim of characterizing continental crustal evolution and tracing sediment provenance. Although several detrital zircon databases have compiled U–Pb and Hf data on global scale, the dataset of detrital zircon with a special focus on modern sediment has rarely been compiled. Here, we publish a new detrital zircon dataset of modern and Quaternary sediments in China with 59,535 U–Pb ages and 4,971 Hf isotope data, with detailed information of isotope ratios, ages, Th/U, etc. Four types of sediments have been classified according to sedimentary environments, including fluvial, marine, aeolian and alluvial sediments. Preliminary analysis is carried out on these compiled data to provide new insights into sedimentary provenance and crustal evolution in China. Eight age populations are identified corresponding to tectonic–thermal or magmatic events, including 2,300–2,700 Ma, 1,800–2,000 Ma, 700–1,000 Ma, 400–500 Ma, 200–300 Ma, 120–200 Ma, 80–120 Ma and < 60 Ma. Accompanying with quantitative comparison between sediments from various sedimentary environments, these U–Pb age distributions reveal the provenance link between “source” and “sink” in both exorheic and endorheic drainages. The compiled εHf(t) data reflect that the crustal history of China is apparently episodic, whose pattern is similar to that of global record. Further work will be implemented for database construction, including the integration of latest literatures, AI-based data extraction and data aggregation.

Abstract Image

Abstract Image

中国现代和第四纪沉积物碎屑锆石U-Pb年龄和Hf同位素分析:一个新数据集及其初步分析
由于碎屑锆石地质年代学的发展,报告或讨论碎屑锆石数据的出版物激增。现代沉积物和第四纪沉积物中的锆英石 U-Pb 年龄与 Hf 同位素的组合分析已广泛开展,目的是描述大陆地壳演化的特征和追踪沉积物的来源。虽然有几个碎屑锆石数据库汇编了全球范围的 U-Pb 和 Hf 数据,但以现代沉积物为重点的碎屑锆石数据集却很少汇编。在此,我们发布了一个新的中国现代沉积和第四纪沉积的碎屑锆石数据集,其中包括59,535个U-Pb年龄和4,971个Hf同位素数据,以及同位素比值、年龄、Th/U等详细信息。根据沉积环境将沉积物分为四类,包括河流沉积物、海洋沉积物、风化沉积物和冲积沉积物。对这些数据进行了初步分析,为了解中国的沉积产地和地壳演化提供了新的视角。研究确定了与构造-热或岩浆事件相对应的八个年龄群,包括 2,300-2,700 Ma、1,800-2,000 Ma、700-1,000 Ma、400-500 Ma、200-300 Ma、120-200 Ma、80-120 Ma 和 < 60 Ma。通过对不同沉积环境的沉积物进行定量比较,这些U-Pb年龄分布揭示了外流河和内流河 "源 "与 "汇 "之间的产地联系。编制的εHf(t)数据反映了中国地壳历史具有明显的偶发性,其模式与全球记录相似。数据库建设的进一步工作将包括整合最新文献、基于人工智能的数据提取和数据汇总。
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来源期刊
Geoscience Data Journal
Geoscience Data Journal GEOSCIENCES, MULTIDISCIPLINARYMETEOROLOGY-METEOROLOGY & ATMOSPHERIC SCIENCES
CiteScore
5.90
自引率
9.40%
发文量
35
审稿时长
4 weeks
期刊介绍: Geoscience Data Journal provides an Open Access platform where scientific data can be formally published, in a way that includes scientific peer-review. Thus the dataset creator attains full credit for their efforts, while also improving the scientific record, providing version control for the community and allowing major datasets to be fully described, cited and discovered. An online-only journal, GDJ publishes short data papers cross-linked to – and citing – datasets that have been deposited in approved data centres and awarded DOIs. The journal will also accept articles on data services, and articles which support and inform data publishing best practices. Data is at the heart of science and scientific endeavour. The curation of data and the science associated with it is as important as ever in our understanding of the changing earth system and thereby enabling us to make future predictions. Geoscience Data Journal is working with recognised Data Centres across the globe to develop the future strategy for data publication, the recognition of the value of data and the communication and exploitation of data to the wider science and stakeholder communities.
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