AMS (Accelerator Mass Spectrometry) radiocarbon dates for eight potsherds from a single piece of pottery from a wetland archaeological site indicated that charred material from the inner pottery surfaces (5052 ± 12 BP; N = 5) is about 90 (14)C years older than that from the outer surfaces (4961 ± 22 BP; N = 7). We considered three possible causes of this difference: the old wood effect, reservo...

To study the influence of different organic-inorganic composition on adsorption in shale, taking Niutitang Formation shale Huijunba syncline southern Hanzhong as research object, based acid treatment to extract kerogen and wet chemicals. Extracting mineral components by oxidation method, a series isothermal experiments were carried out original rock, kerogen, samples. Through three-dimensional ...

This study successfully isolates a fraction of intra-crystalline proteins from shells of the marine gastropod Patella vulgata and assesses the suitability of these proteins for IcPD (Intra-crystalline Protein Diagenesis) geochronology. We discuss the mineralogical composition of this gastropod, investigated for the first time by X-ray diffraction mapping, and use the results to inform our sampl...

Northern forests are important ecosystems for carbon (C) cycling and lakes within them process and bury large amounts of organic-C. Current burial estimates are poorly constrained and may discount other shifts in organic-C burial driven by global change. Here we analyse a suite of northern lakes to determine trends in organic-C burial throughout the Anthropocene. We found burial rates increased...

Abstract The Teena Zn-Pb deposit is located in the Carpentaria Zn Province (Australia), which contains some of largest clastic dominant (CD-type) massive sulfide deposits world. timing main stage hydrothermal mineralization subbasin constrained to midstage burial diagenesis, during a period short-lived regional extension. To distinguish alteration from spatially and temporally overlapping diage...

Carbonate-hosted Mn deposits are widespread in North Africa with most of the ores being hosted by Mesozoic dolomitic formations Moroccan Atlasic system. The Bou Arfa Mn(-Fe) deposit described herein is located eastern High Atlas, close to Front, and has accounted for production ~2 Mt ore grading from 33 82% Mn. mineralization occurs within Sinemurian flat-lying dolostones as stratabound karst-f...

[1] The transformation of hydrated clay minerals (smectite) to anhydrous forms (illite) occurs in the diagenesis of shales in sedimentary basins. The released pore water can lead to excess pore pressures and is of concern in oil drilling operations. Most simply, the process can be modeled as a first-order thermally activated reaction, but an alternative interpretation is that diagenesis occurs ...