Not logged in
PANGAEA.
Data Publisher for Earth & Environmental Science

DeSantis, L D; Barrett, Peter J (1998): Grain size analysis on core plugs of sediment core CRP-1 (Table 1, 2). PANGAEA, https://doi.org/10.1594/PANGAEA.53548, Supplement to: de Santis, Laura; Barrett, Peter J (1998): Grain size analysis of samples from CRP-1. Terra Antartica, 5(3), 375-382, hdl:10013/epic.40512.d001

Always quote above citation when using data! You can download the citation in several formats below.

RIS CitationBibTeX CitationShow MapGoogle Earth

Abstract:
Twenty four core samples from CRP-1, seven from Quaternary strata (20-43.55 meters below sea floor or mbsf) and seventeen from early Miocene strata (43.55 to 147.69 mbsf), have been analysed for their grain-size distribution using standard sieve and Sedigraph techniques. The results are in good agreement with estimates of texture made as part of the visual core description for the 1 :20 core logs for CRP-1 (Cape Roberts Science Team, 1998). Interpretation of the analyses presented here takes into account the likely setting of the site in Quaternary times as it is today, with CRP-1 high on the landward flank of a well-defined submarine ridge rising several hundred metres above basins on either side. In contrast, seismic geometries for strata deposited in early Miocene times indicate a generally planar sea floor dipping gently seaward. Fossils from these strata indicate shallow water depths (< 100 m), indicating the possibility that waves and tidal currents may have influenced sea floor sediments. The sediments analysed here are considered in terms of 3 textural facies: diamict, mud (silt and clay) and sand. Most of the Quaternary section but only 30% of the early Miocene section is diamict, a poorly sorted mixture of sand and mud with scattered clasts, indicating little wave or current influence on its texture. Although not definitive, diamict textures and other features suggest that the sediment originated as basal glacial debris but has been subsequently modified by minor winnowing, consistent with the field interpretation of this facies as ice-proximal and distal glaciomarine sediment. Sediments deposited directly from glacier ice appear to be lacking. Mud facies sediments, which comprise only 10% of the Quaternary section but a third of the early Miocene section, were deposited below wave base and largely from suspension, and show features (described elsewhere in this volume) indicative of the influence of both glacial and sediment gravity flow processes. Sand facies sediments have a considerable proportion of mud, normally more than 20%, but a well-sorted fine-very fine sand fraction. In the context of the early Miocene coastal setting we interpret these sediments as shoreface sands close to wave base.
Project(s):
Coverage:
Latitude: -77.007580 * Longitude: 163.755080
Date/Time Start: 1997-10-17T01:30:00 * Date/Time End: 1997-10-24T02:00:00
Minimum DEPTH, sediment/rock: 20.55 m * Maximum DEPTH, sediment/rock: 146.51 m
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 * 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.
Parameter(s):
#NameShort NameUnitPrincipal InvestigatorMethodComment
1DEPTH, sediment/rockDepthmGeocode
2Size fraction (-1.0) to (-0.5) phi(-1.0)-(-0.5) phi%Barrett, Peter JGrain size, SEDIGRAPH 5000
3Size fraction (-0.5)-0.0 phi(-0.5)-0.0 phi%Barrett, Peter JGrain size, SEDIGRAPH 5000
4Size fraction 0.0-0.5 phi0.0-0.5 phi%Barrett, Peter JGrain size, SEDIGRAPH 5000
5Size fraction 0.5-1.0 phi0.5-1.0 phi%Barrett, Peter JGrain size, SEDIGRAPH 5000
6Size fraction 1.0-1.5 phi1.0-1.5 phi%Barrett, Peter JGrain size, SEDIGRAPH 5000
7Size fraction 1.5-2.0 phi1.5-2.0 phi%Barrett, Peter JGrain size, SEDIGRAPH 5000
8Size fraction 2.0-2.5 phi2.0-2.5 phi%Barrett, Peter JGrain size, SEDIGRAPH 5000
9Size fraction 2.5-3.0 phi2.5-3.0 phi%Barrett, Peter JGrain size, SEDIGRAPH 5000
10Size fraction 3.0-3.5 phi3.0-3.5 phi%Barrett, Peter JGrain size, SEDIGRAPH 5000
11Size fraction 3.5-4.0 phi3.5-4.0 phi%Barrett, Peter JGrain size, SEDIGRAPH 5000
12Size fraction 4.0-4.5 phi4.0-4.5 phi%Barrett, Peter JGrain size, SEDIGRAPH 5000
13Size fraction 4.5-5.0 phi4.5-5.0 phi%Barrett, Peter JGrain size, SEDIGRAPH 5000
14Size fraction 5.0-5.5 phi5.0-5.5 phi%Barrett, Peter JGrain size, SEDIGRAPH 5000
15Size fraction 5.5-6.0 phi5.5-6.0 phi%Barrett, Peter JGrain size, SEDIGRAPH 5000
16Size fraction 6.0-6.5 phi6.0-6.5 phi%Barrett, Peter JGrain size, SEDIGRAPH 5000
17Size fraction 6.5-7.0 phi6.5-7.0 phi%Barrett, Peter JGrain size, SEDIGRAPH 5000
18Size fraction 7.0-7.5 phi7.0-7.5 phi%Barrett, Peter JGrain size, SEDIGRAPH 5000
19Size fraction 7.5-8.0 phi7.5-8.0 phi%Barrett, Peter JGrain size, SEDIGRAPH 5000
20Size fraction 8.0-8.5 phi8.0-8.5 phi%Barrett, Peter JGrain size, SEDIGRAPH 5000
21Size fraction 8.5-9.0 phi8.5-9.0 phi%Barrett, Peter JGrain size, SEDIGRAPH 5000
22Size fraction 9.0-9.5 phi9.0-9.5 phi%Barrett, Peter JGrain size, SEDIGRAPH 5000
23Size fraction 9.5-10.0 phi9.5-10.0 phi%Barrett, Peter JGrain size, SEDIGRAPH 5000
24Size fraction 10.0-10.5 phi10.0-10.5 phi%Barrett, Peter JGrain size, SEDIGRAPH 5000
25Size fraction < 10.5 phi<10.5 phi%Barrett, Peter JGrain size, SEDIGRAPH 5000
26Percentile 01Perc01phiBarrett, Peter JCalculated
27Percentile 05Perc05phiBarrett, Peter JCalculated
28Percentile 16Perc16phiBarrett, Peter JCalculated
29Percentile 25Perc25phiBarrett, Peter JCalculated
30Percentile 50Perc50phiBarrett, Peter JCalculated
31Percentile 75Perc75phiBarrett, Peter JCalculated
32Percentile 84Perc84phiBarrett, Peter JCalculated
33Percentile 95Perc95phiBarrett, Peter JCalculated
34Grain size, meanMeanphiBarrett, Peter JCalculated after FOLK
35Mean, standard deviationMean std dev±Barrett, Peter JCalculated after FOLK
36SkewnessSkewBarrett, Peter JCalculated after FOLK
37Size fraction > 2 mm, gravel>2 mm%Barrett, Peter JGrain size, sieving
38SandSand%Barrett, Peter JGrain size, sieving/settling tube
39SiltSilt%Barrett, Peter JGrain size, sieving/settling tube
40Size fraction < 0.002 mm, > 9 phi, clay<2 µm, >9 phi%Barrett, Peter JGrain size, sieving/settling tube
41Lithology/composition/faciesLithologyBarrett, Peter J
Size:
1094 data points

Download Data

Download dataset as tab-delimited text (use the following character encoding: )

View dataset as HTML