Photos, XRF elements, total N and C, and isotopic data (d18O, d13C) from Deep Sea Drilling Project Site 225 cores, central Red Sea
type: Dataset
description: Photographs, 18O/16O isotopic ratios, XRF-derived elemental and N, C concentration data are provided for sediment cores from Deep Sea Drilling Project Site 225, central Red Sea. This site was originally drilled in April 1972 by rotatary drilling to recover cores through parts of the Plio-Pleistocene sediments for studies of past Red Sea water properties and regional climate. The rotary drilling disturbed the sediments by varied amounts, though left some 1.5-m sections of core almost intact. The X-ray fluorescence (XRF) data comprise elemental proportions for the core archive sections selected where they showed the least drilling disturbance. These and the core photographs were obtained at Kochi University, Japan, using an ITRAX core scanner during 2023 and 2024. Given the age of the cores, the archive sections are not perfectly flat, hence the ITRAX-derived elemental data may be distorted by varied distance between the sensor and the core, as well as by cracks within the core. The user needs to judge these data against the core photographs. As the lighter 16O isotope is evaporated preferentially over 18O and tends to get locked up in ice sheets during glacial periods, measurements of the ratio 18O/16O in carbonate sediments are often useful for recording evidence of global climatic cycles. In the Red Sea, the ratio is further affected by local evaporation, as the basin has been variably isolated from the Indian Ocean, partly as a result of sea-level variations affecting the exchange of water between the basins. Samples of ~20 cm3 were selected with two sets of intervals. Coarse-interval sampling was chosen spanning the Plio-Pleistocene for reconnaissance, while denser sampling was carried out across particular intervals of scientific interest. Within these intervals, the shells of foraminifera were separated into different species. Shells of Cibicidoides mundulus were primarily selected for measurements of 18O/16O. Analyses were carried out in 2024 at the University…
issued: 2024-06-15T09:11:19.833316
modified: 2026-08-06T20:19:01.515403
keyword: Carbon isotopes
keyword: NERC_DDC
keyword: Oxygen isotopes
keyword: Pleistocene
keyword: Pliocene

Deep Sea Drilling project Report
type: Distribution
description: Resource locator
format: PDF
issued: 2026-08-06T20:19:01.561508
modified: 2026-08-06T20:19:01.520177
access URL: http://www.deepseadrilling.org/23/volume/dsdp23_15.pdf
media type: application/pdf

Citation Information - Digital Object Identifier (DOI)
type: Distribution
description: Liebrand, D., Mitchell, N.C., Kubo, Y., Crowley, S. (2024). Photos, XRF elements, total N and C, and isotopic data (d18O, d13C) from Deep Sea Drilling Project Site 225 cores, central Red Sea. NERC EDS National Geoscience Data Centre. (Dataset). https://doi.org/10.5285/b7b53899-283d-48ba-bc78-f1fe1dd97a01
issued: 2026-08-06T20:19:01.561510
modified: 2026-08-06T20:19:01.520255
access URL: https://doi.org/10.5285/b7b53899-283d-48ba-bc78-f1fe1dd97a01

Data
type: Distribution
description: Resource locator
issued: 2026-08-06T20:19:01.561511
modified: 2026-08-06T20:19:01.520303
access URL: https://webapps.bgs.ac.uk/services/ngdc/accessions/index.html#item185322

British Geological Survey (BGS)
type: Organization