Summary of Results from CRP-1, Cape Roberts Project, Antarctica

Cape Robert, J. Anderson, P. Armienti, C. Atkins, P. Barrett, S. Bohaty, S. Bryce, M. Claps, M. Curran, F. J. Davey, L. De Santis, W. Ehrmann, F. Florindo, C. Fielding, M. Hambrey, M. Hannah, D. M. Harwood, S. Henrys, F. Hoelscher, J. A. Howe & 33 others R. Jarrard, R. Kettler, S. Kooyman, C. Kopsch, L. Krissek, M. Lavelle, E. Levac, F. Niessen, Sandra Passchier, T. Paulsen, R. Powell, A. Pyne, G. Rafat, I. J. Raine, A. P. Roberts, L. Sagnotti, S. Sandroni, E. Scholz, J. Simes, J. Smellie, P. Strong, M. Tabecki, F. M. Talarico, M. Taviani, K. L. Verosub, G. Villa, P. N. Webb, G. S. Wilson, T. Wilson, S. W. Wise, T. Wonik, K. Woolfe, J. H. Wrenn

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Abstract

Poorly consolidated diamicton, silt, sand, gravel, and a mixed skeletal carbonate-terrigenous facies was cored from 16 m down to 43.55 mbsf and dated as 1.25 to 1.80 Ma (early Quaternary) from diatom biostratigraphy. Depositional environments range among 1) possible terrestrial exposure, 2) glacimarine sedimentation from nearby glacier ice, 3) deposition under sea-ice like today and 4) shallow-marine sea-ice free carbonate sedimentation, representing much warmer temperatures than today. At least two cycles of rise and fall in sea level are recognised. The pre-Quaternary section comprises mainly diamictite, sandstone and siltstone, organised in a cyclic fashion considered to reflect 6-8 variations in relative sea level and/or glacial advance-retreat. Depositional environments were largely shallow-water glacimarine with sedimentation associated with temperate-glacier termini. Diatom biostratigraphy and magnetostratigraphy indicate the strata range from 22.4 to 17.5 Ma in age (average sediment accumulation rate of 21 m/my). These strata record the first extensive Neogene volcanism in the region around 18 my ago, and contain the first post-Eocene marine-dinoflagellate assemblage (at least 15 new species). Another first report is of the calcareous dinoflagellate (Thoracosphaera), found in both Miocene and Quaternary sediment at CRP-1. The pre-Quaternary section of CRP-1 reaches down almost to the base of seismic Unit V3, previously interpreted as representing mid-Oligocene shallowing and glacial advance in the Victoria Land Basin. Results from CRP-1 suggests that the base of V3 could be as much as 8 my younger. This should be resolved by future drilling planned off Cape Roberts.

Original languageEnglish
Pages (from-to)125-137
Number of pages13
JournalTerra Antarctica
Volume5
Issue number1
StatePublished - 1 Dec 1998

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Ice Cover
Antarctica
ice
Bacillariophyceae
glaciers
Dinoflagellida
Diatoms
carbonates
sea level
Carbonates
sedimentation
biostratigraphy
Oceans and Seas
depositional environment
dinoflagellate
sea ice
volcanic activity
sediments
glacier
diatom

Cite this

Robert, C., Anderson, J., Armienti, P., Atkins, C., Barrett, P., Bohaty, S., ... Wrenn, J. H. (1998). Summary of Results from CRP-1, Cape Roberts Project, Antarctica. Terra Antarctica, 5(1), 125-137.
Robert, Cape ; Anderson, J. ; Armienti, P. ; Atkins, C. ; Barrett, P. ; Bohaty, S. ; Bryce, S. ; Claps, M. ; Curran, M. ; Davey, F. J. ; De Santis, L. ; Ehrmann, W. ; Florindo, F. ; Fielding, C. ; Hambrey, M. ; Hannah, M. ; Harwood, D. M. ; Henrys, S. ; Hoelscher, F. ; Howe, J. A. ; Jarrard, R. ; Kettler, R. ; Kooyman, S. ; Kopsch, C. ; Krissek, L. ; Lavelle, M. ; Levac, E. ; Niessen, F. ; Passchier, Sandra ; Paulsen, T. ; Powell, R. ; Pyne, A. ; Rafat, G. ; Raine, I. J. ; Roberts, A. P. ; Sagnotti, L. ; Sandroni, S. ; Scholz, E. ; Simes, J. ; Smellie, J. ; Strong, P. ; Tabecki, M. ; Talarico, F. M. ; Taviani, M. ; Verosub, K. L. ; Villa, G. ; Webb, P. N. ; Wilson, G. S. ; Wilson, T. ; Wise, S. W. ; Wonik, T. ; Woolfe, K. ; Wrenn, J. H. / Summary of Results from CRP-1, Cape Roberts Project, Antarctica. In: Terra Antarctica. 1998 ; Vol. 5, No. 1. pp. 125-137.
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title = "Summary of Results from CRP-1, Cape Roberts Project, Antarctica",
abstract = "Poorly consolidated diamicton, silt, sand, gravel, and a mixed skeletal carbonate-terrigenous facies was cored from 16 m down to 43.55 mbsf and dated as 1.25 to 1.80 Ma (early Quaternary) from diatom biostratigraphy. Depositional environments range among 1) possible terrestrial exposure, 2) glacimarine sedimentation from nearby glacier ice, 3) deposition under sea-ice like today and 4) shallow-marine sea-ice free carbonate sedimentation, representing much warmer temperatures than today. At least two cycles of rise and fall in sea level are recognised. The pre-Quaternary section comprises mainly diamictite, sandstone and siltstone, organised in a cyclic fashion considered to reflect 6-8 variations in relative sea level and/or glacial advance-retreat. Depositional environments were largely shallow-water glacimarine with sedimentation associated with temperate-glacier termini. Diatom biostratigraphy and magnetostratigraphy indicate the strata range from 22.4 to 17.5 Ma in age (average sediment accumulation rate of 21 m/my). These strata record the first extensive Neogene volcanism in the region around 18 my ago, and contain the first post-Eocene marine-dinoflagellate assemblage (at least 15 new species). Another first report is of the calcareous dinoflagellate (Thoracosphaera), found in both Miocene and Quaternary sediment at CRP-1. The pre-Quaternary section of CRP-1 reaches down almost to the base of seismic Unit V3, previously interpreted as representing mid-Oligocene shallowing and glacial advance in the Victoria Land Basin. Results from CRP-1 suggests that the base of V3 could be as much as 8 my younger. This should be resolved by future drilling planned off Cape Roberts.",
author = "Cape Robert and J. Anderson and P. Armienti and C. Atkins and P. Barrett and S. Bohaty and S. Bryce and M. Claps and M. Curran and Davey, {F. J.} and {De Santis}, L. and W. Ehrmann and F. Florindo and C. Fielding and M. Hambrey and M. Hannah and Harwood, {D. M.} and S. Henrys and F. Hoelscher and Howe, {J. A.} and R. Jarrard and R. Kettler and S. Kooyman and C. Kopsch and L. Krissek and M. Lavelle and E. Levac and F. Niessen and Sandra Passchier and T. Paulsen and R. Powell and A. Pyne and G. Rafat and Raine, {I. J.} and Roberts, {A. P.} and L. Sagnotti and S. Sandroni and E. Scholz and J. Simes and J. Smellie and P. Strong and M. Tabecki and Talarico, {F. M.} and M. Taviani and Verosub, {K. L.} and G. Villa and Webb, {P. N.} and Wilson, {G. S.} and T. Wilson and Wise, {S. W.} and T. Wonik and K. Woolfe and Wrenn, {J. H.}",
year = "1998",
month = "12",
day = "1",
language = "English",
volume = "5",
pages = "125--137",
journal = "Terra Antarctica",
issn = "1122-8628",
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Robert, C, Anderson, J, Armienti, P, Atkins, C, Barrett, P, Bohaty, S, Bryce, S, Claps, M, Curran, M, Davey, FJ, De Santis, L, Ehrmann, W, Florindo, F, Fielding, C, Hambrey, M, Hannah, M, Harwood, DM, Henrys, S, Hoelscher, F, Howe, JA, Jarrard, R, Kettler, R, Kooyman, S, Kopsch, C, Krissek, L, Lavelle, M, Levac, E, Niessen, F, Passchier, S, Paulsen, T, Powell, R, Pyne, A, Rafat, G, Raine, IJ, Roberts, AP, Sagnotti, L, Sandroni, S, Scholz, E, Simes, J, Smellie, J, Strong, P, Tabecki, M, Talarico, FM, Taviani, M, Verosub, KL, Villa, G, Webb, PN, Wilson, GS, Wilson, T, Wise, SW, Wonik, T, Woolfe, K & Wrenn, JH 1998, 'Summary of Results from CRP-1, Cape Roberts Project, Antarctica', Terra Antarctica, vol. 5, no. 1, pp. 125-137.

Summary of Results from CRP-1, Cape Roberts Project, Antarctica. / Robert, Cape; Anderson, J.; Armienti, P.; Atkins, C.; Barrett, P.; Bohaty, S.; Bryce, S.; Claps, M.; Curran, M.; Davey, F. J.; De Santis, L.; Ehrmann, W.; Florindo, F.; Fielding, C.; Hambrey, M.; Hannah, M.; Harwood, D. M.; Henrys, S.; Hoelscher, F.; Howe, J. A.; Jarrard, R.; Kettler, R.; Kooyman, S.; Kopsch, C.; Krissek, L.; Lavelle, M.; Levac, E.; Niessen, F.; Passchier, Sandra; Paulsen, T.; Powell, R.; Pyne, A.; Rafat, G.; Raine, I. J.; Roberts, A. P.; Sagnotti, L.; Sandroni, S.; Scholz, E.; Simes, J.; Smellie, J.; Strong, P.; Tabecki, M.; Talarico, F. M.; Taviani, M.; Verosub, K. L.; Villa, G.; Webb, P. N.; Wilson, G. S.; Wilson, T.; Wise, S. W.; Wonik, T.; Woolfe, K.; Wrenn, J. H.

In: Terra Antarctica, Vol. 5, No. 1, 01.12.1998, p. 125-137.

Research output: Contribution to journalArticleResearchpeer-review

TY - JOUR

T1 - Summary of Results from CRP-1, Cape Roberts Project, Antarctica

AU - Robert, Cape

AU - Anderson, J.

AU - Armienti, P.

AU - Atkins, C.

AU - Barrett, P.

AU - Bohaty, S.

AU - Bryce, S.

AU - Claps, M.

AU - Curran, M.

AU - Davey, F. J.

AU - De Santis, L.

AU - Ehrmann, W.

AU - Florindo, F.

AU - Fielding, C.

AU - Hambrey, M.

AU - Hannah, M.

AU - Harwood, D. M.

AU - Henrys, S.

AU - Hoelscher, F.

AU - Howe, J. A.

AU - Jarrard, R.

AU - Kettler, R.

AU - Kooyman, S.

AU - Kopsch, C.

AU - Krissek, L.

AU - Lavelle, M.

AU - Levac, E.

AU - Niessen, F.

AU - Passchier, Sandra

AU - Paulsen, T.

AU - Powell, R.

AU - Pyne, A.

AU - Rafat, G.

AU - Raine, I. J.

AU - Roberts, A. P.

AU - Sagnotti, L.

AU - Sandroni, S.

AU - Scholz, E.

AU - Simes, J.

AU - Smellie, J.

AU - Strong, P.

AU - Tabecki, M.

AU - Talarico, F. M.

AU - Taviani, M.

AU - Verosub, K. L.

AU - Villa, G.

AU - Webb, P. N.

AU - Wilson, G. S.

AU - Wilson, T.

AU - Wise, S. W.

AU - Wonik, T.

AU - Woolfe, K.

AU - Wrenn, J. H.

PY - 1998/12/1

Y1 - 1998/12/1

N2 - Poorly consolidated diamicton, silt, sand, gravel, and a mixed skeletal carbonate-terrigenous facies was cored from 16 m down to 43.55 mbsf and dated as 1.25 to 1.80 Ma (early Quaternary) from diatom biostratigraphy. Depositional environments range among 1) possible terrestrial exposure, 2) glacimarine sedimentation from nearby glacier ice, 3) deposition under sea-ice like today and 4) shallow-marine sea-ice free carbonate sedimentation, representing much warmer temperatures than today. At least two cycles of rise and fall in sea level are recognised. The pre-Quaternary section comprises mainly diamictite, sandstone and siltstone, organised in a cyclic fashion considered to reflect 6-8 variations in relative sea level and/or glacial advance-retreat. Depositional environments were largely shallow-water glacimarine with sedimentation associated with temperate-glacier termini. Diatom biostratigraphy and magnetostratigraphy indicate the strata range from 22.4 to 17.5 Ma in age (average sediment accumulation rate of 21 m/my). These strata record the first extensive Neogene volcanism in the region around 18 my ago, and contain the first post-Eocene marine-dinoflagellate assemblage (at least 15 new species). Another first report is of the calcareous dinoflagellate (Thoracosphaera), found in both Miocene and Quaternary sediment at CRP-1. The pre-Quaternary section of CRP-1 reaches down almost to the base of seismic Unit V3, previously interpreted as representing mid-Oligocene shallowing and glacial advance in the Victoria Land Basin. Results from CRP-1 suggests that the base of V3 could be as much as 8 my younger. This should be resolved by future drilling planned off Cape Roberts.

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EP - 137

JO - Terra Antarctica

JF - Terra Antarctica

SN - 1122-8628

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Robert C, Anderson J, Armienti P, Atkins C, Barrett P, Bohaty S et al. Summary of Results from CRP-1, Cape Roberts Project, Antarctica. Terra Antarctica. 1998 Dec 1;5(1):125-137.