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Strand, Kari O; Passchier, Sandra; Näsi, Jari (2003): Quartz grain microtextures of sediments from ODP Hole 188-1166A (Table 1). PANGAEA, https://doi.org/10.1594/PANGAEA.705274, Supplement to: Strand, KO et al. (2003): Implications of quartz grain microtextures for onset Eocene/Oligocene glaciation in Prydz Bay, ODP Site 1166, Antarctica. Palaeogeography, Palaeoclimatology, Palaeoecology, 198(1-2), 101-111, https://doi.org/10.1016/S0031-0182(03)00396-1

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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.
Project(s):
Coverage:
Latitude: -67.696160 * Longitude: 74.786930
Date/Time Start: 2000-02-16T01:30:00 * Date/Time End: 2000-02-21T16:00:00
Minimum DEPTH, sediment/rock: 2.75 m * Maximum DEPTH, sediment/rock: 342.88 m
Event(s):
188-1166A * Latitude: -67.696160 * Longitude: 74.786930 * Date/Time Start: 2000-02-16T01:30:00 * Date/Time End: 2000-02-21T16:00:00 * Elevation: -475.4 m * Penetration: 381.3 m * Recovery: 71.31 m * Location: Prydz Bay * Campaign: Leg188 * Basis: Joides Resolution * Device: Drilling/drill rig (DRILL) * Comment: 40 cores; 381.3 m cored; 0 m drilled; 18.7 % recovery
Parameter(s):
#NameShort NameUnitPrincipal InvestigatorMethodComment
1DEPTH, sediment/rockDepthmGeocode
2Sample code/labelSample labelStrand, Kari OODP sample designation
3Quartz, surface textureQz texture%Strand, Kari OScanning electron microscope (SEM)Morphological textures, Angular outline
4Quartz, surface textureQz texture%Strand, Kari OScanning electron microscope (SEM)Morphological textures, Rounded outline
5Quartz, surface textureQz texture%Strand, Kari OScanning electron microscope (SEM)Morphological textures, Low relief
6Quartz, surface textureQz texture%Strand, Kari OScanning electron microscope (SEM)Morphological textures, Medium relief
7Quartz, surface textureQz texture%Strand, Kari OScanning electron microscope (SEM)Morphological textures, High relief
8Quartz, surface textureQz texture%Strand, Kari OScanning electron microscope (SEM)Mechanical textures, Large conchoidal fractures
9Quartz, surface textureQz texture%Strand, Kari OScanning electron microscope (SEM)Mechanical textures, Small conchoidal fractures
10Quartz, surface textureQz texture%Strand, Kari OScanning electron microscope (SEM)Mechanical textures, Arcuate steps
11Quartz, surface textureQz texture%Strand, Kari OScanning electron microscope (SEM)Mechanical textures, Straight steps
12Quartz, surface textureQz texture%Strand, Kari OScanning electron microscope (SEM)Mechanical textures, Crescentic gougles
13Quartz, surface textureQz texture%Strand, Kari OScanning electron microscope (SEM)Mechanical textures, Imbricated blocks
14Quartz, surface textureQz texture%Strand, Kari OScanning electron microscope (SEM)Mechanical textures, Large breakage blocks
15Quartz, surface textureQz texture%Strand, Kari OScanning electron microscope (SEM)Mechanical textures, Fractured plates
16Quartz, surface textureQz texture%Strand, Kari OScanning electron microscope (SEM)Mechanical textures, Subparallel linear fractures
17Quartz, surface textureQz texture%Strand, Kari OScanning electron microscope (SEM)Mechanical textures, Curved grooves
18Quartz, surface textureQz texture%Strand, Kari OScanning electron microscope (SEM)Mechanical textures, Straight grooves
19Quartz, surface textureQz texture%Strand, Kari OScanning electron microscope (SEM)Mechanical textures, V-shaped percussion cracks
20Quartz, surface textureQz texture%Strand, Kari OScanning electron microscope (SEM)Mechanical textures, Meandering ridges
21Quartz, surface textureQz texture%Strand, Kari OScanning electron microscope (SEM)Mechanical textures, Edge abrasion
22Quartz, surface textureQz texture%Strand, Kari OScanning electron microscope (SEM)Mechanical textures, Surface abrasion
23Quartz, surface textureQz texture%Strand, Kari OScanning electron microscope (SEM)Mechanical textures, Deep troughs
24Quartz, surface textureQz texture%Strand, Kari OScanning electron microscope (SEM)Chemical textures, Preweathered surfaces
25Quartz, surface textureQz texture%Strand, Kari OScanning electron microscope (SEM)Chemical textures, Weathered surfaces
26Quartz, surface textureQz texture%Strand, Kari OScanning electron microscope (SEM)Chemical textures, Small precipitation features
27Quartz, surface textureQz texture%Strand, Kari OScanning electron microscope (SEM)Chemical textures, Large precipitation features
28Quartz, surface textureQz texture%Strand, Kari OScanning electron microscope (SEM)Chemical textures, Adhering particles
29Quartz, surface textureQz texture%Strand, Kari OScanning electron microscope (SEM)Chemical textures, New growth
Size:
532 data points

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