CRP Science Team; Barrett, Peter J; Fielding, Christopher R; Wise, Sherwood W (1998): Preliminary results and documentation of sediment core CRP-1 from the Ross Sea off Cape Roberts, Antarctica [dataset publication series]. PANGAEA, https://doi.org/10.1594/PANGAEA.547981, Supplement to: Barrett, Peter J; Fielding, Christopher R; Wise, Sherwood W (1998): Initial report on CRP-1, Cape Roberts Project, Antarctica. Terra Antartica, 5(1), 187 pp, hdl:10013/epic.28286.d001
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Abstract:
The first hole of the Cape Roberts Project, CRP-1, was drilled in October, 1997, to a depth of 148 metres below the sea floor (mbsf) before being terminated unexpectedly the loss of fast sea-ice seaward of the rig following a severe storm. The site lies in 150 m of water at 77.008°S and 163.755°E, 16 km off Cape Roberts. This part of the report outlines the geologic setting, a gently tilted sequence near the margin of the Victoria Land Basin, and describes the history of the growth of sea ice, which provided the drilling platform, as well as the history of the drilling itself. Core recovery was around 77% in soft and brittle strata to 100 m and 98% below that. The sequence was found to comprise a Quaternary glacigenic interval down to 43.55 mbsf and below this an early Miocene interval that was also glacigenic. Core properties that were studied include fracture patterns, porosity, sonic velocity and magnetic susceptibility. Velocity in particular was useful in relating the cored sequence to the regional seismic stratigraphy. A preliminary assessment suggests that the bottom of the hole is 15 m short of the boundary between seismic sequences V3 and V4. Analytical facilities new to the Antarctic and used for processing samples for the project are described here and include a bench top palynological processing system and a palaeomagnetic laboratory. The core management and sampling system, which recorded over 2000 samples, is also outlined.
Project(s):
Cape Roberts Project (CRP)
Coverage:
Latitude: -77.007580 * Longitude: 163.755080
Date/Time Start: 1997-10-17T01:30:00 * Date/Time End: 1997-10-24T02:00:00
Event(s):
CRP-1 (16 km ENE Cape Roberts) * Latitude: -77.007580 * Longitude: 163.755080 * Date/Time Start: 1997-10-17T01:30:00 * Date/Time End: 1997-10-24T02:00:00 * Elevation: -153.5 m * Penetration: 132.06 m * Recovery: 113.32 m * Location: off Cape Roberts, Ross Sea, Antarctica * Campaign: CRP-1 * Basis: Sampling/drilling ice * Method/Device: Core wireline system (CWS) * Comment: sea ice thickness: 1.60 m, recovery 86 %. Age and lithology of oldest strata: 22-24 Ma; mudstone with scattered pebbles.
Comment:
Hand draft of the core description in pdf-format hdl:10013/epic.26950.d001
License:
Creative Commons Attribution 3.0 Unported (CC-BY-3.0)
Size:
5 datasets
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Datasets listed in this publication series
- CRP Science Team (1998): Summary of qualitative detrital modes for grains of all sizes in Miocene strata of sediment core CRP-1 (Table 7_2). https://doi.org/10.1594/PANGAEA.433060
- CRP Science Team (1998): Summary of qualitative detrital modes for grains of all sizes in Quaternary strata of sediment core CRP-1 (Table 7_1). https://doi.org/10.1594/PANGAEA.433059
- CRP Science Team (1998): Description and compositional characteristics of representative intervals of the Quaternary carbonate-rich unit of sediment core CRP-1 (Table 3). https://doi.org/10.1594/PANGAEA.433057
- CRP Science Team (1998): Description of sediment core CRP-1. https://doi.org/10.1594/PANGAEA.726378
- CRP Science Team (1998): Documentation of sediment core CRP-1 from core box images. https://doi.org/10.1594/PANGAEA.667128