Implications of quartz grain microtextures for onset Eocene/Oligocene Glaciation in Prydz Bay, ODP Site 1166, Antarctica

Kari Strand, Sandra Passchier, Jari Näsi

Research output: Contribution to journalArticle

58 Citations (Scopus)

Abstract

This paper presents the results of the scanning electron microscopic (SEM) analysis of quartz grains from a selection of samples at Site 1166. Ocean Drilling Program Leg 188 drilled Site 1166 on the Prydz Bay continental shelf, Antarctica, to document onset and fluctuations of East-Antarctic glaciation. This site recovered Upper Pliocene-Holocene glacial sediments directly above Cretaceous through Lower Oligocene sediments recording the transition from preglacial to early glacial conditions. SEM analysis of quartz grains at Site 1166 was used to characterize the glacial and preglacial sediments by their diagnostic textures. Angular edges, edge abrasion as well as arcuate to straight steps, are the most frequent features in glacial deposits. The highest frequency of grains with round edges is present in Middle-Late Eocene fluvio-deltaic sands. However, angular outlines, fractured plates with subparallel linear fractures and edge abrasion indicating glacier influence are also present. Preglacial carbonaceous mudstone and laminated gray claystone show distinctive high relief quartz grains and some chemical weathering on grain surfaces. The results of the microtextural analysis of quartz grains are used to verify some critical periods of ice sheet evolution, such as the transition from the East Antarctic preglacial to glacial conditions on the continental shelf from Middle/Late Eocene to Late Eocene/Early Oligocene time.

Original languageEnglish
Pages (from-to)101-111
Number of pages11
JournalPalaeogeography, Palaeoclimatology, Palaeoecology
Volume198
Issue number1-2
DOIs
StatePublished - 15 Sep 2003

Fingerprint

glaciation
quartz
Ocean Drilling Program
Antarctica
Oligocene
Eocene
glacial deposit
abrasion
continental shelf
electron
sediments
claystone
chemical weathering
electrons
glacial deposits
sediment
mudstone
ice sheet
Pliocene
glacier

Keywords

  • Antarctica
  • Eocene/Oligocene glaciation
  • Glacial sedimentation
  • Ice sheet evolution
  • Quartz sand
  • Scanning electron microscope
  • Surface texture

Cite this

@article{c357b64f06be487782c8460e332c5e59,
title = "Implications of quartz grain microtextures for onset Eocene/Oligocene Glaciation in Prydz Bay, ODP Site 1166, Antarctica",
abstract = "This paper presents the results of the scanning electron microscopic (SEM) analysis of quartz grains from a selection of samples at Site 1166. Ocean Drilling Program Leg 188 drilled Site 1166 on the Prydz Bay continental shelf, Antarctica, to document onset and fluctuations of East-Antarctic glaciation. This site recovered Upper Pliocene-Holocene glacial sediments directly above Cretaceous through Lower Oligocene sediments recording the transition from preglacial to early glacial conditions. SEM analysis of quartz grains at Site 1166 was used to characterize the glacial and preglacial sediments by their diagnostic textures. Angular edges, edge abrasion as well as arcuate to straight steps, are the most frequent features in glacial deposits. The highest frequency of grains with round edges is present in Middle-Late Eocene fluvio-deltaic sands. However, angular outlines, fractured plates with subparallel linear fractures and edge abrasion indicating glacier influence are also present. Preglacial carbonaceous mudstone and laminated gray claystone show distinctive high relief quartz grains and some chemical weathering on grain surfaces. The results of the microtextural analysis of quartz grains are used to verify some critical periods of ice sheet evolution, such as the transition from the East Antarctic preglacial to glacial conditions on the continental shelf from Middle/Late Eocene to Late Eocene/Early Oligocene time.",
keywords = "Antarctica, Eocene/Oligocene glaciation, Glacial sedimentation, Ice sheet evolution, Quartz sand, Scanning electron microscope, Surface texture",
author = "Kari Strand and Sandra Passchier and Jari N{\"a}si",
year = "2003",
month = "9",
day = "15",
doi = "10.1016/S0031-0182(03)00396-1",
language = "English",
volume = "198",
pages = "101--111",
journal = "Palaeogeography, Palaeoclimatology, Palaeoecology",
issn = "0031-0182",
publisher = "Elsevier",
number = "1-2",

}

Implications of quartz grain microtextures for onset Eocene/Oligocene Glaciation in Prydz Bay, ODP Site 1166, Antarctica. / Strand, Kari; Passchier, Sandra; Näsi, Jari.

In: Palaeogeography, Palaeoclimatology, Palaeoecology, Vol. 198, No. 1-2, 15.09.2003, p. 101-111.

Research output: Contribution to journalArticle

TY - JOUR

T1 - Implications of quartz grain microtextures for onset Eocene/Oligocene Glaciation in Prydz Bay, ODP Site 1166, Antarctica

AU - Strand, Kari

AU - Passchier, Sandra

AU - Näsi, Jari

PY - 2003/9/15

Y1 - 2003/9/15

N2 - This paper presents the results of the scanning electron microscopic (SEM) analysis of quartz grains from a selection of samples at Site 1166. Ocean Drilling Program Leg 188 drilled Site 1166 on the Prydz Bay continental shelf, Antarctica, to document onset and fluctuations of East-Antarctic glaciation. This site recovered Upper Pliocene-Holocene glacial sediments directly above Cretaceous through Lower Oligocene sediments recording the transition from preglacial to early glacial conditions. SEM analysis of quartz grains at Site 1166 was used to characterize the glacial and preglacial sediments by their diagnostic textures. Angular edges, edge abrasion as well as arcuate to straight steps, are the most frequent features in glacial deposits. The highest frequency of grains with round edges is present in Middle-Late Eocene fluvio-deltaic sands. However, angular outlines, fractured plates with subparallel linear fractures and edge abrasion indicating glacier influence are also present. Preglacial carbonaceous mudstone and laminated gray claystone show distinctive high relief quartz grains and some chemical weathering on grain surfaces. The results of the microtextural analysis of quartz grains are used to verify some critical periods of ice sheet evolution, such as the transition from the East Antarctic preglacial to glacial conditions on the continental shelf from Middle/Late Eocene to Late Eocene/Early Oligocene time.

AB - This paper presents the results of the scanning electron microscopic (SEM) analysis of quartz grains from a selection of samples at Site 1166. Ocean Drilling Program Leg 188 drilled Site 1166 on the Prydz Bay continental shelf, Antarctica, to document onset and fluctuations of East-Antarctic glaciation. This site recovered Upper Pliocene-Holocene glacial sediments directly above Cretaceous through Lower Oligocene sediments recording the transition from preglacial to early glacial conditions. SEM analysis of quartz grains at Site 1166 was used to characterize the glacial and preglacial sediments by their diagnostic textures. Angular edges, edge abrasion as well as arcuate to straight steps, are the most frequent features in glacial deposits. The highest frequency of grains with round edges is present in Middle-Late Eocene fluvio-deltaic sands. However, angular outlines, fractured plates with subparallel linear fractures and edge abrasion indicating glacier influence are also present. Preglacial carbonaceous mudstone and laminated gray claystone show distinctive high relief quartz grains and some chemical weathering on grain surfaces. The results of the microtextural analysis of quartz grains are used to verify some critical periods of ice sheet evolution, such as the transition from the East Antarctic preglacial to glacial conditions on the continental shelf from Middle/Late Eocene to Late Eocene/Early Oligocene time.

KW - Antarctica

KW - Eocene/Oligocene glaciation

KW - Glacial sedimentation

KW - Ice sheet evolution

KW - Quartz sand

KW - Scanning electron microscope

KW - Surface texture

UR - http://www.scopus.com/inward/record.url?scp=0141522913&partnerID=8YFLogxK

U2 - 10.1016/S0031-0182(03)00396-1

DO - 10.1016/S0031-0182(03)00396-1

M3 - Article

AN - SCOPUS:0141522913

VL - 198

SP - 101

EP - 111

JO - Palaeogeography, Palaeoclimatology, Palaeoecology

JF - Palaeogeography, Palaeoclimatology, Palaeoecology

SN - 0031-0182

IS - 1-2

ER -