南海沉积物碎屑锆石U–Pb年龄和Lu–Hf同位素数据库

IF 3.3 3区 地球科学 Q2 GEOSCIENCES, MULTIDISCIPLINARY
Yu Huang, Lisha Hu
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引用次数: 0

摘要

源-汇分析考察了源区和盆地(汇)动力学对现代和古代沉积体系中沉积物的生成、运移、组成、分布和沉积的影响。碎屑锆石作为最稳定的碎屑矿物之一,其U-Pb年代学和地球化学特征对沉积物物源分析和古地理重建具有重要意义。南海作为东南亚最大的边缘海,与青藏高原的隆升和中国河流的演变有着密切的关系。本研究主要收集南海(包括海南和台湾)新生代沉积物中已公布的碎屑锆石。这些碎屑锆石主要集中在南海北部新生代多幕式裂谷盆地。该数据集共收集了293个样品的碎屑锆石U-Pb数据21,760个,22个样品的碎屑锆石Lu - Hf同位素数据995个,主要研究时代为古近纪和新近纪。这些颗粒的最佳年龄在4691 ~ 10ma之间,超过一半的颗粒年龄在500ma以下。样品的176Hf/177Hf比值在0.280509 ~ 0.28306之间,εHf(t)值在- 63.8 ~ 24.6之间。南海新生代沉积物主要年龄为130 ~ 95 Ma、175 ~ 130 Ma和265 ~ 230 Ma。碎屑锆石年龄和Lu-Hf U-Pb同位素数据包含在这个数据集是一个重要的地质记录的沉积和构造演化的SCS和河流的演变等古珠江和古代红河,可以提供一个基础和重要线索或探索SCS沉积物的来源,盆地演化的动态过程,沿海排水系统的演化和构造隆升的青藏高原。
本文章由计算机程序翻译,如有差异,请以英文原文为准。

A database of detrital zircon U–Pb ages and Lu–Hf isotope of sediments in the South China Sea

A database of detrital zircon U–Pb ages and Lu–Hf isotope of sediments in the South China Sea

A database of detrital zircon U–Pb ages and Lu–Hf isotope of sediments in the South China Sea

Source-to-sink analysis examines the effects of source areas and basin (sink) dynamics on the generation, transport, composition, distribution and deposition of sediment in modern and ancient sedimentary systems. Detrital zircon, as one of the most stable detrital minerals, its U–Pb geochronology and geochemistry is pivotal for sedimentary provenance analysis and reconstructing palaeogeography. The South China Sea (SCS), as the largest marginal sea in the Southeast Asia, is closely related to the uplift of the Tibetan Plateau and the evolution of Chinese rivers. In this study, we mainly collect published detrital zircon of Cenozoic sediments in the SCS (include Hainan and Taiwan Islands). These detrital zircon were concentrated on Cenozoic multiple episodic rift basins in the northern part of the SCS. A total of 21,760 detrital zircon U–Pb data from 293 samples and 995 detrital zircon Lu-Hf isotope data from 22 samples were collected in this dataset, with the main study epochs being the Palaeogene and Neogene. Best ages of these grains are range from 4,691 to 10 Ma and more than half of them within age less than 500 Ma. The 176Hf/177Hf ratios of the SCS samples ranging from 0.280509 to 0.28306 and the εHf(t) values from −63.8 to 24.6. The main age group of the SCS Cenozoic sediments were at 130–95 Ma, 175–130 Ma and 265–230 Ma. The detrital zircon U–Pb age and Lu–Hf isotope data contained in this dataset is an important geological record of the sedimentary and tectonic evolution of the SCS and the evolution of rivers such as the ancient Pearl River and the ancient Red River, which can provide a basis and important clues or exploring the source of sediments in the SCS, the dynamical processes of basin evolution, the evolution of the coastal drainage system and the tectonic uplift of the Tibetan Plateau.

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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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