Differential movement across Byrd Glacier, Antarctica, as indicated by apatite (U-Th)/He thermochronology and geomorphological analysis

Research output: Contribution to journalArticle

2 Citations (Scopus)

Abstract

The objectives of this study were to assess possible differential movement across an inferred fault beneath Byrd Glacier, and to measure the timing of unroofing in this portion of the Transantarctic Mountains. Apatites separated from rock samples collected from known elevations at various locations north and south of Byrd Glacier were dated using single crystal (U-Th)/He analysis. Results indicate a denudation rate of c. 0.04 mm a21 in the time range c. 140-40 Ma. Distinct age v. elevation plots from north and south of Byrd Glacier indicate an offset of c. 1 km across the glacier with south side up. A Landsat image of the Byrd Glacier area was overlain on an Aster Global Digital Elevation Model and spot elevations of the Kukri erosion surface to the north and south of Byrd Glacier were mapped. The difference in elevation of the erosion surface across Byrd Glacier also shows an offset of c. 1 km with south side up. Results support a model of relatively uniform cooling and unroofing of the region with later, post-40 Ma fault displacement that uplifted the south side of Byrd Glacier relative to the north.

Original languageEnglish (US)
Pages (from-to)37-43
Number of pages7
JournalGeological Society Special Publication
Volume381
Issue number1
DOIs
StatePublished - 2013

Fingerprint

Glaciers
thermochronology
Apatite
apatite
glacier
unroofing
Erosion
erosion
fault displacement
Antarctica
analysis
denudation
Landsat
digital elevation model
Rocks
Single crystals
crystal
Cooling
cooling
mountain

ASJC Scopus subject areas

  • Ocean Engineering
  • Water Science and Technology
  • Geology
  • Geotechnical Engineering and Engineering Geology

Cite this

@article{ea23d903e72a47c88c1ada46d31a35f3,
title = "Differential movement across Byrd Glacier, Antarctica, as indicated by apatite (U-Th)/He thermochronology and geomorphological analysis",
abstract = "The objectives of this study were to assess possible differential movement across an inferred fault beneath Byrd Glacier, and to measure the timing of unroofing in this portion of the Transantarctic Mountains. Apatites separated from rock samples collected from known elevations at various locations north and south of Byrd Glacier were dated using single crystal (U-Th)/He analysis. Results indicate a denudation rate of c. 0.04 mm a21 in the time range c. 140-40 Ma. Distinct age v. elevation plots from north and south of Byrd Glacier indicate an offset of c. 1 km across the glacier with south side up. A Landsat image of the Byrd Glacier area was overlain on an Aster Global Digital Elevation Model and spot elevations of the Kukri erosion surface to the north and south of Byrd Glacier were mapped. The difference in elevation of the erosion surface across Byrd Glacier also shows an offset of c. 1 km with south side up. Results support a model of relatively uniform cooling and unroofing of the region with later, post-40 Ma fault displacement that uplifted the south side of Byrd Glacier relative to the north.",
author = "Foley, {D. J.} and E. Stump and {Van Soest}, Matthijs and Kelin Whipple and Kip Hodges",
year = "2013",
doi = "10.1144/SP381.25",
language = "English (US)",
volume = "381",
pages = "37--43",
journal = "Geological Society Special Publication",
issn = "0305-8719",
publisher = "Geological Society of London",
number = "1",

}

TY - JOUR

T1 - Differential movement across Byrd Glacier, Antarctica, as indicated by apatite (U-Th)/He thermochronology and geomorphological analysis

AU - Foley, D. J.

AU - Stump, E.

AU - Van Soest, Matthijs

AU - Whipple, Kelin

AU - Hodges, Kip

PY - 2013

Y1 - 2013

N2 - The objectives of this study were to assess possible differential movement across an inferred fault beneath Byrd Glacier, and to measure the timing of unroofing in this portion of the Transantarctic Mountains. Apatites separated from rock samples collected from known elevations at various locations north and south of Byrd Glacier were dated using single crystal (U-Th)/He analysis. Results indicate a denudation rate of c. 0.04 mm a21 in the time range c. 140-40 Ma. Distinct age v. elevation plots from north and south of Byrd Glacier indicate an offset of c. 1 km across the glacier with south side up. A Landsat image of the Byrd Glacier area was overlain on an Aster Global Digital Elevation Model and spot elevations of the Kukri erosion surface to the north and south of Byrd Glacier were mapped. The difference in elevation of the erosion surface across Byrd Glacier also shows an offset of c. 1 km with south side up. Results support a model of relatively uniform cooling and unroofing of the region with later, post-40 Ma fault displacement that uplifted the south side of Byrd Glacier relative to the north.

AB - The objectives of this study were to assess possible differential movement across an inferred fault beneath Byrd Glacier, and to measure the timing of unroofing in this portion of the Transantarctic Mountains. Apatites separated from rock samples collected from known elevations at various locations north and south of Byrd Glacier were dated using single crystal (U-Th)/He analysis. Results indicate a denudation rate of c. 0.04 mm a21 in the time range c. 140-40 Ma. Distinct age v. elevation plots from north and south of Byrd Glacier indicate an offset of c. 1 km across the glacier with south side up. A Landsat image of the Byrd Glacier area was overlain on an Aster Global Digital Elevation Model and spot elevations of the Kukri erosion surface to the north and south of Byrd Glacier were mapped. The difference in elevation of the erosion surface across Byrd Glacier also shows an offset of c. 1 km with south side up. Results support a model of relatively uniform cooling and unroofing of the region with later, post-40 Ma fault displacement that uplifted the south side of Byrd Glacier relative to the north.

UR - http://www.scopus.com/inward/record.url?scp=84887271184&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=84887271184&partnerID=8YFLogxK

U2 - 10.1144/SP381.25

DO - 10.1144/SP381.25

M3 - Article

AN - SCOPUS:84887271184

VL - 381

SP - 37

EP - 43

JO - Geological Society Special Publication

JF - Geological Society Special Publication

SN - 0305-8719

IS - 1

ER -