Ortiz-Karpf, A, Hodgson, DM orcid.org/0000-0003-3711-635X, Jackson, CA-L et al. (1 more author) (2018) Mass-Transport Complexes as Markers of Deep-Water Fold-and-Thrust Belt Evolution: Insights from the Southern Magdalena Fan, Offshore Colombia. Basin Research, 30 (S1). pp. 65-88. ISSN 0950-091X
Abstract
Mass wasting is an important process in the degradation of deep-water fold-and-thrust belts. However, the relationship between mass-transport complex (MTC) emplacement and the timing and spatial progression of contractional deformation of the seabed have not been extensively studied. This study uses high-quality, 3D seismic reflection data from the southern Magdalena Fan, offshore Colombia to investigate how the growth of a deep-water fold-and-thrust belt (the southern Sinú fold belt) is recorded in the source, distribution and size of MTCs. More than nine distinct, but coalesced MTCs overlie a major composite basal erosion surface. This surface formed by multiple syn- and post-tectonic mass-wasting events and is thus highly diachronous, thereby recording a protracted period of tectonism, seascape degradation and associated sedimentation. The size and source location of these MTCs changed through time: the oldest ‘detached’ MTCs are relatively small (over 9–100 km² in area) and sourced from the flanks of growing anticlines, whereas the younger ‘shelf-attached’ MTCs are considerably larger (more than 200–300 km²), are sourced from the shelf, and post-date the main phase of active folding and thrusting. Changes in the source, distribution and size of MTCs are tied to the sequential nucleation, amplification and along-strike propagation of individual structures, showing that MTCs can be used to constrain the timing and style of contractional deformation, and seascape evolution in time and space.
Metadata
Item Type: | Article |
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Authors/Creators: |
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Copyright, Publisher and Additional Information: | © 2016 The Authors. This is the peer reviewed version of the following article: Ortiz-Karpf, A, Hodgson, DM, Jackson, CA-L and McCaffrey, WD, (2016) Mass-Transport Complexes as Markers of Deep-Water Fold-and-Thrust Belt Evolution: Insights from the Southern Magdalena Fan, Offshore Colombia. Basin Research, 30: 65–88, which has been published in final form at http://doi.org/10.1111/bre.12208. This article may be used for non-commercial purposes in accordance with Wiley Terms and Conditions for Self-Archiving. |
Dates: |
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Institution: | The University of Leeds |
Academic Units: | The University of Leeds > Faculty of Environment (Leeds) > School of Earth and Environment (Leeds) > Institute for Applied Geosciences (IAG) (Leeds) |
Funding Information: | Funder Grant number GDF SUEZ E&P International SA No Ext Ref |
Depositing User: | Symplectic Publications |
Date Deposited: | 14 Jun 2016 11:02 |
Last Modified: | 16 Mar 2018 15:32 |
Status: | Published |
Publisher: | Wiley |
Identification Number: | 10.1111/bre.12208 |
Open Archives Initiative ID (OAI ID): | oai:eprints.whiterose.ac.uk:100691 |