Early Cretaceous Paleoenvironmental Evolution and Mineral Enrichment Patterns of a Lacustrine System Under Orbital Forcing in the Yin'e Basin

The samples cover the entire first member of the Bayingebi Formation (total thickness: 189 m). Specific grouping: 26 samples were prepared as thin sections for microscopic and scanning electron microscope (SEM) observations; 71 samples were analyzed for mineral composition using X-ray diffraction (XRD); 51 mudstone and marlstone samples were selected for determinations of total organic carbon (TOC), organic carbon isotope (δ¹³C), and nitrogen isotope (δ¹⁵N); while 20 high-organic-content mudstone samples were used for biomarker analysis via gas chromatography-mass spectrometry (GC-MS); and 369 samples were subjected to chromaticity.

本次数据集的样品覆盖巴音戈壁组（Bayingebi Formation）第一段，总厚度为189米。具体分组如下：制备26块样品为薄片，用于显微镜及扫描电子显微镜（SEM）观测；对71块样品开展X射线衍射（XRD）分析以测定矿物组成；选取51块泥岩与泥灰岩样品，测定其总有机碳（TOC）、有机碳同位素（δ¹³C）及氮同位素（δ¹⁵N）；采用20块高有机质含量泥岩样品，通过气相色谱-质谱联用法（GC-MS）进行生物标志物分析；另有369块样品完成色度测试。