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  • 1
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    PANGAEA
    In:  Supplement to: Tartarotti, Paola; Crispini, Laura; Einaudi, Florence; Campari, E (2006): Data report: Reoriented structures in the East Pacific Rise basaltic crust from ODP Hole 1256D, Leg 206: integration of core measurements and electrical-acoustic images. In: Teagle, DAH; Wilson, DS; Acton, GD; Vanko, DA (eds.) Proceedings of the Ocean Drilling Program, Scientific Results, College Station, TX (Ocean Drilling Program), 206, 1-26, https://doi.org/10.2973/odp.proc.sr.206.004.2006
    Publication Date: 2024-01-09
    Description: Brittle structures (open fractures and veins) from basaltic oceanic crust drilled at Ocean Drilling Program (ODP) Site 1256 (Guatemala Basin, Pacific Ocean) during Leg 206 were reoriented to the geographic coordinates by (1) correlating structures observed on the core with unoriented images of the exterior of the core and (2) correlating core structures and unoriented images with oriented borehole images. The images of the exterior of the core were obtained by scanning whole-core pieces with the Deutsche Montan Technologie Digital Color Core-Scan system. In the unrolled core images, nonhorizontal planar structures (e.g., veins, faults, or fractures) produce sinusoidal-shaped curves. These can be matched to similar-shaped features imaged along the borehole wall. The borehole images were obtained by the Formation MicroScanner (FMS)-sonic (Dipole Sonic Imager) tool string and the Ultrasonic Borehole Imager (UBI). The FMS provides high-resolution electrical resistivity-based images of borehole walls. FMS images are oriented to magnetic north using the General Purpose Inclinometer Tool. This allows the dip and azimuth of geological features intersecting the hole to be measured from the processed FMS image. The UBI features a high-resolution transducer that provides acoustic images of the borehole wall. The UBI was used in hard rocks for the first time in the history of the ODP during Leg 206.
    Keywords: 206-1256D; Angle of rotation; Bed dip; Bed dip direction; Depth, bottom/max; Depth, reconstructed; Depth, reference; DEPTH, sediment/rock; Depth, top/min; DRILL; Drilling/drill rig; Formation microscanner (FMS); Joides Resolution; Leg206; North Pacific Ocean; Ocean Drilling Program; ODP; Piece; Sample code/label; Standard error; Strike; Structure
    Type: Dataset
    Format: text/tab-separated-values, 5838 data points
    Location Call Number Expected Availability
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  • 2
    Publication Date: 2024-02-12
    Description: A dataset describing exposed bedrock and surficial geology of Antarctica constructed by the GeoMAP Action Group of SCAR (The Scientific Committee on Antarctic Research) and GNS Science, New Zealand. Legacy geological map data have been captured into a geographic information system (GIS), refining its spatial reliability, harmonising classification, then improving representation of glacial sequences and geomorphology. A total 99,080 polygons have been unified for depicting geology at 1:250,000 scale, but locally there are some areas with higher spatial precision. Geological definition in GeoMAP v.2022-08 is founded on a mixed chronostratigraphic- and lithostratigraphic-based classification. Description of rock and moraine polygons employs international GeoSciML data protocols to provide attribute-rich and queriable data; including bibliographic links to 589 source maps and scientific literature. Data are provided under CC-BY License as zipped ArcGIS geodatabase, QGIS geopackage or GoogleEarth kmz files. GeoMAP is the first detailed geological dataset covering all of Antarctica. GeoMAP depicts 'known geology' of rock exposures rather than 'interpreted' sub-ice features and is suitable for continent-wide perspectives and cross-discipline interrogation.
    Keywords: Antarctica; bedrock; Binary Object; Binary Object (File Size); Binary Object (MD5 Hash); Binary Object (Media Type); geology; Geomorphology; GIS; Glacial deposits; historical data; mapping; synthesis
    Type: Dataset
    Format: text/tab-separated-values, 3 data points
    Location Call Number Expected Availability
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