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Wise, Sherwood W; Smellie, John L; Aghib, Fulvia Sharon; Jarrard, Richard D; Krissek, Lawrence A (2001): (Table 1) Description of grain size, cement, and matrix in sediment core CRP-3 sandstones. PANGAEA, https://doi.org/10.1594/PANGAEA.466043, Supplement to: Wise, SW et al. (2001): Authigenic smectite clay coats in CRP-3 drillcore, Victoria Land Basin, Antarctica, as a possible indicator of fluid flow: a progress report. Terra Antartica, 8(3), 281-298, hdl:10013/epic.28200.d001

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Abstract:
The presence of authigenic smectite in the lower Oligocene sandstones of the Cape Roberts Project core CRP-3 from the Victoria Land Basin of Antarctica is confirmed by scanning electron, scanning-transmission electron, and light microscopy. It was emplaced as a single generation of cement within the lower portion of the Oligocene section. This section has undergone no discernible compaction since cementation. Permeabilities measured on fifty core plugs show that the lower portion of the Oligocene (from 370-766 meters below sea floor) also has systematically higher values than sediment in uppermost CRP-3 and all of CRP-2 and CRP-1.
Three models for smectite authigenesis are considered as multiple working hypotheses to be tested: 1) Burial diagenesis with necessary components sourced from volcanogenic materials and heavy minerals within the drilled sequence: 2) Precipitation from hydrothermal waters associated with possible igneous intrusion(s) and nearby faults; 3) Mobilization and injection of regionally compactive 'thermobaric' fluids along a nearby fault that bounds a major graben parallel to the Transantarctic Mountain Front. The preponderance of the available evidence and Occum's Razor favors the first model, although special circumstances dictated by the position of the drill site along a rapidly subsiding rift basin require that all three models be considered equally until our analyses are complete.
Project(s):
Coverage:
Latitude: -77.006000 * Longitude: 163.719000
Date/Time Start: 1999-10-09T00:00:00 * Date/Time End: 1999-11-19T00:00:00
Minimum DEPTH, sediment/rock: 5.79 m * Maximum DEPTH, sediment/rock: 787.66 m
Event(s):
CRP-3 * Latitude: -77.006000 * Longitude: 163.719000 * Date/Time Start: 1999-10-09T00:00:00 * Date/Time End: 1999-11-19T00:00:00 * Elevation: -295.0 m * Penetration: 939 m * Recovery: 936 m * Location: Ross Sea * Campaign: CRP-3 * Basis: Sampling/drilling from ice * Method/Device: Core wireline system (CWS) * Comment: 11.76 km at 76° true from Cape Roberts, 2.04 km at 225° true from CRP-2. Fast ice thickness: 2.0 to 2.2 m. Sea rise embedded to 9.55 mbsf. Lateral ice movement from spudding 5.0 m to 82° true. HQ core to 345.85 mbsf. NQ core to 939.42 mbsf. Core recovery 97%. Phase 1 logging to 345 mbsf, Phase 2 logging to 773 mbsf, Phase 3 logging to 918 mbsf. Deepest Cenozoic lithology and depth: sandstone breccia from 822.87 to 823.11 mbsf. Age of oldest Cenozoic strata: earliest Oligocene or latest Eocene. Deepest core lithology and depth: light red-brown quartz-cemented quartz sandstone to 939.42 mbsf. Age of bedrock: (mid?) Devonian.
Parameter(s):
#NameShort NameUnitPrincipal InvestigatorMethod/DeviceComment
DEPTH, sediment/rockDepth sedmGeocode
Grain size descriptionGrain size descrWise, Sherwood W
Sorting descriptionSort descrWise, Sherwood W
CementCementWise, Sherwood WCarbonate
CementCementWise, Sherwood WSmectite
Matrix descriptionMatrix descrWise, Sherwood WMud
Size:
240 data points

Data

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


Depth sed [m]

Grain size descr

Sort descr

Cement
(Carbonate)

Cement
(Smectite)

Matrix descr
(Mud)
5.79silty VF-FpoorPervasive, abundant
24.32VF-F(-M)poorPervasive, abundant
67.06VF-F(-M)poorPatchy, minor
89.50silty VF-F(-C)very poorPervasive, abundant
177.22VF-Fpoor-moderatePervasive, abundant
183.69VF-Fpoor-moderateTrace
202.59FmoderatePatchy, minor
207.71VFwellPatchy, minorPervasive, abundant
226.42F-MwellPervasive, abundantPervasive, abundant
235.50FmoderatePatchy, minor, Laminated allogenic smectiteTrace?
249.67FmoderatePervasive, abundantPatchy, minor, Laminated allogenic smectite S
256.66VF-(-F)poor-moderatePatchy, minorPervasive, abundant
270.99MwellTrace
279.68VFwellPervasive, abundantPatchy, minor, Laminated allogenic smectite S
286.17VFwellTraceTrace, Laminated allogenic smectite SPatchy, minor
289.22F-Mmoderate-wellPatchy, minorTrace
315.77VF-MpoorTracePervasive, abundant
326.67MbimodalPervasive, abundant
335.96VF-FwellPatchy, minorPervasive, abundant, Radial authigeneic smectite
345.76F-MmoderatePatchy, minor, Laminated allogenic smectite
348.70F-MwellPatchy, minorPatchy, minor, Radial authigeneic smectite
351.88F-MwellPervasive, abundant, Radial authigeneic smectite
358.95FwellPatchy, minorPervasive, abundant, Radial authigeneic smectite
369.64VF-FmoderatePatchy, minorPervasive, abundant, Radial authigeneic smectite
375.32F-MwellPatchy, minorPervasive, abundant, Radial authigeneic smectite
383.76Fmoderate-wellPatchy, minor, Radial authigeneic smectite ?
387.46F-MmoderatePatchy, minor?
390.78FwellTracePervasive, abundant, Radial authigeneic smectite
396.58F-MwellTracePervasive, abundant, Radial authigeneic smectite
405.75silty VFpoorPatchy, minorPervasive, abundant, Laminated allogenic smectite
415.94VF-FpoorPervasive, abundant, Laminated allogenic smectite S
422.81FwellPervasive, abundantPatchy, minor, Radial authigeneic smectite
426.77FwellPatchy, minorPervasive, abundant, Radial authigeneic smectite
437.12VFwellPervasive, abundant, Radial authigeneic smectite
445.23MwellPatchy, minor
449.73FwellPervasive, abundant
455.81VFwellPatchy, minorPatchy, minor, Radial authigeneic smectite
460.13VF-Fmoderate-wellPatchy, minor, Radial authigeneic smectite
473.61(F-)Mpoor-moderateTracePatchy, minor, Laminated allogenic smectite ?
475.34VFwellTracePatchy, minor, Radial authigeneic smectite
480.68F-MmoderatePatchy, minorPervasive, abundant, Radial authigeneic smectite
481.22F-Mpoor-moderateTracePervasive, abundant, Radial authigeneic smectite
486.03FwellTrace
495.15F-Mmoderate-wellTrace
500.21F-Mmoderate-well
509.36FwellPatchy, minor
513.17F(-M)moderatePatchy, minor
525.36MmoderatePervasive, abundant
533.26M-Cpoor-moderatePatchy, minorPervasive, abundant, Radial authigeneic smectite
543.87VF-FpoorTracePervasive, abundant, Radial authigeneic smectite
550.03VF-FpoorPatchy, minorPervasive, abundant, Radial authigeneic smectite
571.80Fwell
615.37VF(-F)wellTracePatchy, minor, Radial authigeneic smectite
626.18(VF-)Fpoor-moderatePervasive, abundantPatchy, minor, Radial authigeneic smectite
630.38FmoderatePatchy, minorPervasive, abundant, Radial authigeneic smectite, Thick authigenic smectite (>5 microns)
643.11F-MpoorPervasive, abundant, Radial authigeneic smectite, Thick authigenic smectite (>5 microns)
655.86VFmoderate-wellPervasive, abundant, Radial authigeneic smectite, Thick authigenic smectite (>5 microns)
664.03FwellPatchy, minor
673.28VF-Fmoderate-wellPervasive, abundant, Radial authigeneic smectite, Thick authigenic smectite (>5 microns)
681.02VF(-F)moderate-wellPervasive, abundant, Radial authigeneic smectite, Thick authigenic smectite (>5 microns)
686.52FwellPervasive, abundant, Radial authigeneic smectite, Thick authigenic smectite (>5 microns)
696.77VF-Fmoderate-wellPervasive, abundant, Radial authigeneic smectite, Thick authigenic smectite (>5 microns)
715.48F-Mpoor-moderatePervasive, abundant, Radial authigeneic smectite, Thick authigenic smectite (>5 microns)
724.08VF-FwellPervasive, abundant, Radial authigeneic smectite, Thick authigenic smectite (>5 microns)
730.87VFmoderate-wellPervasive, abundant, Radial authigeneic smectite, Thick authigenic smectite (>5 microns)
735.39VFwellPervasive, abundant, Radial authigeneic smectite, Thick authigenic smectite (>5 microns)
737.35VF-FmoderatePervasive, abundant, Radial authigeneic smectite, Thick authigenic smectite (>5 microns)
750.02VFpoor-moderatePervasive, abundant F
770.26VF(-F)poor-moderateTracePervasive, abundant, Radial authigeneic smectite, Thick authigenic smectite (>5 microns)
787.66VFpoor-moderatePervasive, abundant, Radial authigeneic smectite