This study investigates the geochemical signatures of hydrothermal fluids in surface sediments (0–20 cm) from 48 sampling sites along the Mid-Atlantic Ridge (MAR), covering the North Atlantic (20°N–45°N), Equatorial Atlantic (0°–10°S), and South Atlantic (20°S–40°S) segments. Samples were collected between 2021–2023 using remotely operated vehicles (ROVs). Hydrothermal anomalies are identified ...

This study investigates the geochemical characteristics of carbonates (mineralogy, major/trace element composition, stable isotopes) in surface sediments (0–15 cm) from 56 sampling sites across the Mediterranean Sea. Samples were collected between 2021–2023, covering the Western, Central, and Eastern Mediterranean sub-basins. Carbonate content ranges from 12.3% to 78.6% (average=45.8%), dominat...

This comprehensive study investigates the geochemical controls on arsenic (As) mobility in groundwater and sediments from the Ganges-Brahmaputra-Meghna (GBM) Delta, one of the world’s largest arsenic-affected regions. A total of 216 groundwater samples and 108 sediment cores (0–30 m depth) were collected from 72 sampling sites across Bangladesh and West Bengal (India) between 2021–2023. Groundw...

This study investigates the geochemical behavior, provenance, and environmental significance of rare earth elements (REEs) in surface sediments (0–10 cm) from 42 sampling sites across the Mekong River Basin (MRB). Samples were collected between 2021–2023, covering the upper, middle, and lower reaches, including mainstream and major tributaries. REE concentrations (ΣREE) range from 18.7 to 126.3...

This study investigates the geochemical characteristics, sources, and environmental risks of heavy metals (As, Cd, Cr, Cu, Hg, Ni, Pb, Zn) in urban topsoil (0–20 cm) from three industrialized cities (Wuhan, Changsha, Xiangtan) in the Yangtze River Middle Reaches, Central China. A total of 324 topsoil samples were collected across industrial, residential, commercial, and green space areas betwee...