Submarine fan and slope-apron deposition in a Cretaceous Forearc Basin: The Gursoku Formation (Kavak-Samsun, N. Turkey)

Akdag K., Kirmaci A. Z.

JOURNAL OF ASIAN EARTH SCIENCES, vol.31, pp.429-438, 2008 (SCI-Expanded) identifier identifier

  • Publication Type: Article / Article
  • Volume: 31
  • Publication Date: 2008
  • Doi Number: 10.1016/j.jseaes.2007.05.005
  • Journal Name: JOURNAL OF ASIAN EARTH SCIENCES
  • Journal Indexes: Science Citation Index Expanded (SCI-EXPANDED), Scopus
  • Page Numbers: pp.429-438
  • Keywords: cretaceous, Gurusoku Formation, Forearc Basin, submarine slope, submarine fans, DENSITY TURBIDITY CURRENTS, FACIES MODELS, PERSPECTIVE, SEQUENCE, FLOWS
  • Karadeniz Technical University Affiliated: No

Abstract

The Late Cretaceous Gursoku Formation represents the proximal fill of the Sinop-Samsun Forearc Basin that was probably initiated by extension during the Early Cretaceous. The succession records sedimentation in two contrasting depositional systems: a slope-apron flanking a faulted basin margin and coarse-grained submarine fans. The slope-apron deposits consist of thinly bedded turbiditic sandstones and mudstones, interbedded with non-channelized chaotic boulder beds and intraformational slump sheets representing a spectrum of processes ranging from debris flow to submarine slides. The submarine fan sediments are represented by conglomerates and sandstones interpreted as deposited from high density turbidity currents and non-cohesive debris flows. The occurrence of both slope apron and submarine fan depositional systems in the Gursoku Formation may indicates that the region was a tectonically active basin margin during the Late Cretaceous. (c) 2007 Elsevier Ltd. All rights reserved.