粤港澳大湾区地质图

图件内容主要包括陆域地层，海域沉积物类型和时代、出露海底的岩浆岩及浅断层。 沉积物类型和时代：应用粒度分析，采用尤登-温德华氏等比制粒级标准将沉积物粒度分为四个级别：①＞2mm（＜-1Φ）为砾级，②2～0.063mm（-1～4Φ）为砂级，③0.063～0.004mm（4～8Φ）为粉砂级，④＜0.004mm（＞8Φ）为粘土级，并采用Folk等分类方案对沉积物进行分类。采用14C测年等实验测试数据划分表层沉积物类型并确定其时代。用颜色和花纹表示沉积物类型，用代号表示沉积物年代。 第四系沉积厚度等值线：应用深海钻探184航次1143站位所钻遇的第四系底界和过井地震剖面，对比解释本区的单道和多道地震资料，勾绘第四系厚度等值线。 第四系剖面：应用实测的地震资料编制第四系剖面。 岩浆岩：用颜色及符号表示不同类型和期次的岩浆岩。 浅断层：用红色线条表示所有断至第四纪地层的浅断层。The map contents mainly include terrestrial strata, marine sediment types and ages, submarine-exposed magmatic rocks and shallow faults. Sediment types and ages: Grain size analysis was conducted, and the sediment grain size was divided into four grades using the Youden-Wentworth equal-ratio grain size standard: ① >2mm (<-1Φ) is gravel grade, ② 2~0.063mm (-1~4Φ) is sand grade, ③ 0.063~0.004mm (4~8Φ) is silt grade, ④ <0.004mm (>8Φ) is clay grade. The sediments were classified using the Folk et al. classification scheme. The types of surface sediments were classified and their ages were determined based on experimental test data such as 14C dating. Sediment types are represented by colors and patterns, while sediment ages are denoted by codes. Quaternary sediment thickness contour map: The Quaternary bottom boundary encountered at Site 1143 of Ocean Drilling Program (ODP) Leg 184 and well-crossing seismic profiles were used, combined with the correlation and interpretation of single-channel and multi-channel seismic data in this study area, to delineate the Quaternary thickness contour lines. Quaternary seismic sections: Quaternary seismic sections were compiled using measured seismic data. Magmatic rocks: Different types and stages of magmatic rocks are represented by colors and symbols. Shallow faults: All shallow faults that cut into Quaternary strata are represented by red lines.

搜集汇总

背景与挑战

背景概述

该数据集是2019年发布的粤港澳大湾区地质图，由广州海洋地质调查局和广东省地质调查院贡献，主要包含陆域地层、海域沉积物类型和时代、岩浆岩及浅断层等地质信息，采用粒度分析和14C测年等方法加工，数据量为6.23 MB，适用于海洋地质学研究和相关科学应用。