Photointerpretation of Tertiary structures in platform cover strata of interior Oscar II Land, Spitsbergen

Research output: Contribution to journalArticle

8 Citations (Scopus)

Abstract

A structural map of Oscar II Land compiled using black and white, stereo‐pair air photos and other available information sources suggests the existence of three structural zones within the deformed platform cover strata. The western zone consists of basement involved overthrusts of complex geometry in the north large‐scale folds of platform cover strata with a stepped, down to the east profile in the south. The central zone consists primarily of folds within Kapp Starostin Fm. and overlying Triassic strata that likely formed above a subhorizontal décollement within Gipshuken Fm. strata. Farther to the east thrusts emplace Permian Kapp Starostin Fm. strata over Triassic strata. This zone probably represents stratigraphic climb of the basal decollement. Conservative estimates of shortening for the central and eastern zones are in the 15‐25% range. The contribution of the western zone structures to overall Tertiary shortening depends on the geometry of faults underlying the stepped folds and is uncertain at present. Changes along strike are in part due to differential levels of erosion and changes in transport direction, but also probably important was variable thickness of the platform cover strata involved (less to the north) and the availability of incompetent horizons along which thrust‐fiats could form. Two areas with anomalous structural trends may represent oblique ramps.

Original languageEnglish (US)
Pages (from-to)155-172
Number of pages18
JournalPolar Research
Volume6
Issue number2
DOIs
StatePublished - Jan 1 1988

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Photointerpretation
Geometry
Erosion
Availability
fold
Triassic
Air
geometry
decollement
land
Permian
thrust
erosion
air

ASJC Scopus subject areas

  • Oceanography
  • Environmental Chemistry
  • Environmental Science(all)
  • Earth and Planetary Sciences (miscellaneous)

Cite this

Photointerpretation of Tertiary structures in platform cover strata of interior Oscar II Land, Spitsbergen. / Maher, Harmon Droge.

In: Polar Research, Vol. 6, No. 2, 01.01.1988, p. 155-172.

Research output: Contribution to journalArticle

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