2026-10-12T01:53:27Z https://www.scidb.cn/oai

10.57760/sciencedb.012bu 2026-09-14T15:08:55Z

2026-09-14 East China Sea Shelf Shallow-Gas Dataset doi:10.57760/sciencedb.012bu en This dataset compiles all primary observations used in the study "Controls on shallow-gas distribution on the East China Sea shelf." It is provided as a single Excel workbook in which each worksheet corresponds to one dataset employed in the article. The contents are: (1) a regional acoustic gas-top depth point dataset (37,728 picks) delineating shallow-gas distribution across the shelf; (2) three 0.1°-resolution grids of Holocene sediment thickness — full Holocene (0–10 ka), last 2 ka, and 7.7–2 ka — used to evaluate sediment-accumulation control; (3) laser grain-size data for seven boreholes (YS1–YS7); (4) headspace gas concentrations (CH₄, CO₂) and stable carbon/hydrogen isotopic compositions (δ¹³C-CH₄, δD-CH₄, δ¹³C-CO₂) for gas-source discrimination via the Whiticar diagram; (5) major and trace element geochemistry of borehole YS6 together with redox proxies; (6) soil-mechanics indices for five gas-bearing boreholes; and (7) the raw piezocone (CPTU) profile from the single in-situ sounding near borehole YS6 that independently records the free-gas interval (8.7–9.6 m). Column headers embed their units (e.g., gas_top_depth_m, CH4_uL_L). The dataset supports investigation of sediment-environment (non-diffusive) controls on shallow-gas occurrence and bears directly on global marine methane-flux accounting, which currently rests on a diffusion-based paradigm. Data are licensed CC-BY 4.0; contact: duan-xy@qq.com. shallow gas; East China Sea; SMTZ Duan Xiaoyong PUBLIC https://creativecommons.org/licenses/by/4.0/ dataset Science Data Bank