下扬子南部上泥盆统-下石炭统五通群陆源碎屑岩显微图像数据集

A micrograph dataset of terrigenous clastic rocks of Upper Devonian Lower Carboniferous Wutong Group in southern lower Yangtze

加里东构造末期,华南大部分地区暴露并遭受不同程度的风化剥蚀。泥盆纪大海侵淹没扬子地块大部分地区,并广泛沉积一套岩性高度相似的陆源碎屑岩,与下伏地层为不整合接触。该套碎屑岩的物源信息、沉积环境信息是揭示加里东构造运动末期下扬子地区古地貌和晚古生代初期沉积和古地理格局的钥匙。下扬子地区可公开查阅的五通群基础岩石学数据较为缺乏,重复的基础岩石学工作还在不断地进行。为了更好地共享这些基础岩石学数据,本数据集通过使用偏光显微镜,对下扬子南部上泥盆统-下石炭统五通群12条剖面和12个露头共计200个碎屑岩样品标准岩石薄片进行图像采集与镜下特征分析,同时收集前人文献中12个五通群碎屑岩样薄片图像,共212个碎屑岩的显微图像整理成详细的数据集。本数据集包含了样品的采样位置、地层时代、岩石名称及特征等信息,不仅可以应用于五通群基础地质学研究,也可应用于图像智能识别等交叉学科研究中,还可以为社会生产提供基础资料服务。

In late Caledonian orogeny,most of the southern China was exposed to and suffered from weathering and denudation in different degrees.The Devonian transgression submerged most of the Yangtze block,through which terrigenous siliciclastic rocks of similar lithology were widely deposited,in unconformable contact with the underlying strata.An examination of the provenance and sedimentary environment information of the siliciclastic rocks reveals the paleogeomorphology of the lower Yangtze region in the late Caledonian tectonic movement and the paleogeographic pattern of sedimentary lattices in the early Late Paleozoic.Existing petrological data of the Wutong group in the lower Yangtze region is scarce,and petrological work has been unnecessarily repeated.In order to better share these basic petrological data,we collected and analyzed the characteristics of 200 siliciclastic rock samples under the polarized microscope from 12 sections and 12 outcrops of the upper Devonian Lower Carboniferous Wutong group in the southern part of the lower Yangtze River.In the meantime,we collected a total of 212 micro images of 12 siliciclastic rock thin sections of Wutong group from existing literature.This dataset contains such information as the sampling location,stratigraphic age,rock name and characteristics of the samples.It can be used to support basic geological research of Wutong group,as well as interdisciplinary research related to intelligent image recognition.It also supplements basic data services for social production.