Organic carbon and bulk nitrogen isotope and abundance data and metal abundance data from the Mesoarchean VMS deposit and associated strata. Detailed information is given in Stueeken, E.E., Boocock, T.J., Robinson, A., Mikhail, S. and Johnson, B.W., 2021. Hydrothermal recycling of sedimentary ammonium into oceanic crust and the Archean ocean at 3.24 Ga. Geology, 49(7), pp.822-826.

Pyrite samples from selected sedimentary organic-rich formations or associated igneous and metamorphic rocks were analysed by conventional S isotopic analysis. Pyrites were measured in order to provide insights into their origin. Light and variable S isotope compositions in pyrite have been used to infer the influence of sulphate-reducing bacteria (and subsequent Se precipitation by sulphate-reducing microbes), whereas heavier S isotope compositions indicate a non-biological origin (i.e. physical and chemical diagenesis).

High-presicion Ar- Ar and U-Pb dating of magmatic events in the British Tertiary igneous province is difficult to reconcile with the magnetostratigraphy. The normally maganetised rocks of Mull Centres 2 and 3 are too old for C26N, much too young for C25N, and of too long a duration to fit into normal cryptpchrons in C26R. The most likely reason for this discrepancy is that the accepted time range of C26N (58-57.6 Ma) is too young by at least 0.5m.y. We propose to resolve the problem by re-determining the age of the Palaeocene-Ecocene boundary by Ar-Ar dating of sanidine from ash layers in northern Jutland. Our Ar-Ar dates will be checked against U-Pb ages of zircon and sphen from the Danish ashes and from the Hebrides.

Organic carbon, total nitrogen, total reduced sulfur and carbonate-associated sulfur isotopes measured on decarbonated stromatolite samples from the Paranoa Group (1.1 Ga).

Triple-sulfur isotope data from schists and carbonates in the Eoarchean Isua Greenstone Belt (3.7 Ga), using a new leaching technique and a multi-collector ICP-MS. The results reveal distinct pattern between the two lithologies and demonstrate an atmospheric contribution of sulfur in both cases. This may support the notion that these rocks represent metamorphosed marine sediments. However, hydrothermal alteration needs to be assessed in more detail to verify the antiquity of these signatures.

These notes are based on a photographic record, made between 1950 and 1977, of the glacial deposits exposed in the workings of the Sundon Cement and Lime Works in south Bedfordshire. The site is located on the brow of the Lower Chalk escarpment at about 160 m OD (Figure 1). The principal section (Figure 2) was up to 14 m high and 300 m long aligned approximately N-S as shown on the 1:10, 560 map. The glacial deposits constituted the overburden on the Chalk. The description of the face, including black and white photographs, is as it was in 1950-1954. The colour photographs were taken on fleeting visits up to 1977 south of the 1950-1954 working. The photographs are referenced by BGS numbers and shortened to the last 3 figures.

Measurements of the shape and size of plagioclase and olivine grains in a suite of dolerite dykes and sills. The olivine data refer to the family of sills forming the Little Minch Sill Complex where exposed on the Isle of Skye, while the plagioclase work also includes a range of sills and dykes from all over the world. Measurments of dihedral angles at junctions between two grains of plagioclase and one of pyroxene, again in dolerites from dykes and sills, and also from the Rustenburg Suite of the Bushveld Layered Intrusion in South Africa.

This dataset contains pore pressure measurements from the Bunter Sandstone Formation across the Southern North Sea of the UK Continental Shelf including quadrants 41 -50. The pressure measurements have been collected from released offshore legacy well records available from the UK National Data Repository (NDR) which is managed and served by the North Sea Transition Authority (NSTA). The data were compiled by British Geological Survey researchers in support of research projects seeking to evaluate the potential of the Bunter Sandstone Formation for storage of carbon dioxide. These projects were funded by United Kingdom Research and Innovation (UKRI). The dataset comprises direct pressure measurements from formation pressure testers (downhole tools containing a probe and packer on a retractable pad, a pretest chamber and pressure gauges) as well as formation pressure estimates from Drill Stem Tests (DST). Most of the measurements comprise results from Schlumberger’s Repeat Formation Tester (RFT), Formation Multi Tester (FMT) and Modular Dynamics Tester (MDT) tools.

Geochemical and field data collected from samples from ore deposits hosted in the Troodos ophiolite, Cyprus by Dr Andrew Martin during his PhD. File T1 contains sample names, locations and description and file T2 contains photographs and field observations for sample localities. File T3 contains portable x-ray fluorescence (XRF) data from powdered Troodos ophiolite samples. Files T4 - T8 contain sulphide trace element data from laser-ablation inductively-coupled-plasma mass-spectrometry (LA-ICP-MS) analysis of samples from various deposits in the Troodos ophiotlite. Files T9 and T10 contain bulk sample geochemistry from aqua regia digest and ICP-MS for deposits from the Troodos ophiolite. File T11 contains results from conventional ä34S analysis of sulfide minerals from Troodos deposits and file T12 contains x-ray diffraction analysis data from silica-rich deposits in the Troodos ophiolite. Data is used in papers available at https://doi.org/10.1016/j.oregeorev.2019.01.024, https://doi.org/10.1180/mgm.2018.81 and https://doi.org/10.1016/j.chemgeo.2019.119325 and in Dr Andrew Martin's PhD thesis, available at http://orca.cf.ac.uk/124346/.

Clay minerals (smectites) were synthesised experimentally to determine isotope fractionation factors (Li and Mg). The data are provided here. Interpretation is ongoing.