TY - JOUR

T1 - The Jan Mayen microcontinent's Cenozoic stratigraphic succession and structural evolution within the NE-Atlantic

AU - Blischke, Anett

AU - Stoker, Martyn S.

AU - Brandsdóttir, Bryndís

AU - Hopper, John R.

AU - Peron-Pinvidic, Gwenn

AU - Ólavsdóttir, Jana

AU - Japsen, Peter

N1 - Funding Information: This research project is conducted at the University of Iceland and funded by the National Energy Authority of Iceland (Orkustofnun) and the Iceland GeoSurvey . We specifically commemorate Dr. þórarinn S. Arnarson, Orkustofnun, for his support and advice. Data permissions were provided by Spectrum ASA, TGS; the University of Oslo (UiO), the Bundesanstalt für Geowissenschaften und Rohstoffe (BGR), and GEUS (Geological Survey of Denmark and Greenland). We thank Guðrún Helgadóttir and Páll Reynisson, Marine Research Institute of Iceland (MRI), for making the multibeam and backscatter data available and the Norwegian Petroleum Directorate (NPD) for use of their 2D multichannel reflection data sets from 2011 & 2012. Funding Information: This research project is conducted at the University of Iceland and funded by the National Energy Authority of Iceland (Orkustofnun) and the Iceland GeoSurvey. We specifically commemorate Dr. þórarinn S. Arnarson, Orkustofnun, for his support and advice. Data permissions were provided by Spectrum ASA, TGS; the University of Oslo (UiO), the Bundesanstalt für Geowissenschaften und Rohstoffe (BGR), and GEUS (Geological Survey of Denmark and Greenland). We thank Guðrún Helgadóttir and Páll Reynisson, Marine Research Institute of Iceland (MRI), for making the multibeam and backscatter data available and the Norwegian Petroleum Directorate (NPD) for use of their 2D multichannel reflection data sets from 2011 & 2012. Publisher Copyright: © 2019 Elsevier Ltd

PY - 2019/5

Y1 - 2019/5

N2 - Cenozoic seismic-stratigraphic units of the Jan Mayen microcontinent (JMMC) are presented in context with kinematic modelling of plate reorganisation correlation with conjugate margins, and their chrono-stratigraphic correlations. Our model of development of the microcontinent, from continental breakup to present-day, is based on the interpretation of new and legacy geological and geophysical data. From these data, we have established eleven Cenozoic seismic-stratigraphic units (JM-70 to JM-01) separated by ten locally varying unconformities and disconformities, six of which are regional and reflect discrete tectonostratigraphic phases in the evolution of the Jan Mayen region. These six main phases are: (1) pre-breakup Paleocene (>55 Ma) extension represented by seismic unit JM-70, which comprises terrigenous and marine sedimentary rocks and a thick plateau basalt volcanic succession; (2) Early Eocene (∼55-52 Ma) syn-breakup (rift-to-drift) represented by seismic unit JM-60 and comprises a mix of intrusive igneous rocks, subaerial lavas and hyaloclastites, and non-marine to shallow-marine sedimentary rocks; (3) Early to Mid-Eocene (∼52-43 Ma) syn-breakup (rift-to-drift) and rift-transfer across the Iceland plateau rift, represented by seismic unit JM-50 that comprises volcanic rocks and shelf-margin deltaic sediment succession; (4) Late Eocene – Early Oligocene (43-30 Ma) ridge transfer and tectonic re-arrangement in proximity of the Iceland hotspot represented in the rock record by shallow-to deep-marine deposits preserved as units JM-40, JM-35, and JM-30; (5) in the Late Oligocene (30-22 Ma), a second breakup occurred along the western JMMC igneous margin, together with the formation of the south-western Jan Mayen igneous province, the proto-Kolbeinsey ridge, and the initiation of proto-Iceland all, of which, is represented in the rock record by seismic units JM-20 and JM-15; and, (6) Miocene-to-present-day separation of the JMMC from East Greenland (since 22 Ma), which is represented by seismic units JM-10, JM-05, and JM-01 that reflect a general deepening of the microcontinent.

AB - Cenozoic seismic-stratigraphic units of the Jan Mayen microcontinent (JMMC) are presented in context with kinematic modelling of plate reorganisation correlation with conjugate margins, and their chrono-stratigraphic correlations. Our model of development of the microcontinent, from continental breakup to present-day, is based on the interpretation of new and legacy geological and geophysical data. From these data, we have established eleven Cenozoic seismic-stratigraphic units (JM-70 to JM-01) separated by ten locally varying unconformities and disconformities, six of which are regional and reflect discrete tectonostratigraphic phases in the evolution of the Jan Mayen region. These six main phases are: (1) pre-breakup Paleocene (>55 Ma) extension represented by seismic unit JM-70, which comprises terrigenous and marine sedimentary rocks and a thick plateau basalt volcanic succession; (2) Early Eocene (∼55-52 Ma) syn-breakup (rift-to-drift) represented by seismic unit JM-60 and comprises a mix of intrusive igneous rocks, subaerial lavas and hyaloclastites, and non-marine to shallow-marine sedimentary rocks; (3) Early to Mid-Eocene (∼52-43 Ma) syn-breakup (rift-to-drift) and rift-transfer across the Iceland plateau rift, represented by seismic unit JM-50 that comprises volcanic rocks and shelf-margin deltaic sediment succession; (4) Late Eocene – Early Oligocene (43-30 Ma) ridge transfer and tectonic re-arrangement in proximity of the Iceland hotspot represented in the rock record by shallow-to deep-marine deposits preserved as units JM-40, JM-35, and JM-30; (5) in the Late Oligocene (30-22 Ma), a second breakup occurred along the western JMMC igneous margin, together with the formation of the south-western Jan Mayen igneous province, the proto-Kolbeinsey ridge, and the initiation of proto-Iceland all, of which, is represented in the rock record by seismic units JM-20 and JM-15; and, (6) Miocene-to-present-day separation of the JMMC from East Greenland (since 22 Ma), which is represented by seismic units JM-10, JM-05, and JM-01 that reflect a general deepening of the microcontinent.

KW - Cenozoic

KW - Dual-breakup

KW - Hiatus

KW - Iceland plateau

KW - Jan Mayen microcontinent

KW - Kinematic model

KW - Seismic stratigraphy

KW - Unconformity

UR - http://www.scopus.com/inward/record.url?scp=85063615684&partnerID=8YFLogxK

U2 - 10.1016/j.marpetgeo.2019.02.008

DO - 10.1016/j.marpetgeo.2019.02.008

M3 - Journal article

AN - SCOPUS:85063615684

VL - 103

SP - 702

EP - 737

JO - Marine and Petroleum Geology

JF - Marine and Petroleum Geology

SN - 0264-8172

ER -