Organo-mineral interactions in active layer and permafrost soils along aging Arctic landscapes in Alaska (2021–2024)

This dataset provides detailed geochemical and soil property measurements from permafrost-affected soils across a deglaciation gradient and an unglaciated, loess-influenced site on the North Slope of Alaska. Each record includes depth-resolved information for individual samples, including Sample ID, upper, lower, and mid-depths, site, and soil type, along with mineralogical and chemical properties such as pyrophosphate-, oxalate-, and citrate-extractable Al and Fe (Al_pyro, Fe_pyro, Al_ox, Fe_ox, Al_cit, Fe_cit), calcium (Ca_pyro), total carbon and nitrogen (Percent_C, Percent_N), pH, and calculated Al–Fe indices (AlFep, AlFeo, AlFec, PC). The dataset enables analyses of organo–mineral interactions, soil organic carbon, and mineralogical controls across landscape and permafrost depth gradients, and is intended to support reproducibility and further studies of Arctic soil biogeochemistry.