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Mesozoic-Cenozoic sedimentation in the Kane Fracture Zone, western North Atlantic, and uplift history of the Bermuda Rise

1994; Geological Society of America; Volume: 106; Issue: 3 Linguagem: Inglês

10.1130/0016-7606(1994)106 2.3.co;2

1943-2674

Gary E. Jaroslow, Brian E. Tucholke,

Geological and Geochemical Analysis

Research Article| March 01, 1994 Mesozoic-Cenozoic sedimentation in the Kane Fracture Zone, western North Atlantic, and uplift history of the Bermuda Rise GARY E. JAROSLOW; GARY E. JAROSLOW 1MIT/WHOI Joint Program in Oceanography/Applied Ocean Science and Engineering, Woods Hole, Massachusetts 02543 Search for other works by this author on: GSW Google Scholar BRIAN E. TUCHOLKE BRIAN E. TUCHOLKE 1MIT/WHOI Joint Program in Oceanography/Applied Ocean Science and Engineering, Woods Hole, Massachusetts 02543 Search for other works by this author on: GSW Google Scholar Author and Article Information GARY E. JAROSLOW 1MIT/WHOI Joint Program in Oceanography/Applied Ocean Science and Engineering, Woods Hole, Massachusetts 02543 BRIAN E. TUCHOLKE 1MIT/WHOI Joint Program in Oceanography/Applied Ocean Science and Engineering, Woods Hole, Massachusetts 02543 Publisher: Geological Society of America First Online: 01 Jun 2017 Online ISSN: 1943-2674 Print ISSN: 0016-7606 Geological Society of America GSA Bulletin (1994) 106 (3): 319–337. https://doi.org/10.1130/0016-7606(1994)106 2.3.CO;2 Article history First Online: 01 Jun 2017 Cite View This Citation Add to Citation Manager Share Icon Share Facebook Twitter LinkedIn Email Tools Icon Tools Get Permissions Search Site Citation GARY E. JAROSLOW, BRIAN E. TUCHOLKE; Mesozoic-Cenozoic sedimentation in the Kane Fracture Zone, western North Atlantic, and uplift history of the Bermuda Rise. GSA Bulletin 1994;; 106 (3): 319–337. doi: https://doi.org/10.1130/0016-7606(1994)106 2.3.CO;2 Download citation file: Ris (Zotero) Refmanager EasyBib Bookends Mendeley Papers EndNote RefWorks BibTex toolbar search Search Dropdown Menu toolbar search search input Search input auto suggest filter your search All ContentBy SocietyGSA Bulletin Search Advanced Search Abstract Seismic reflection profiles, basement structure-contour maps, and bathymetric data are used to analyze sedimentation patterns over a distance of ∼2,300 km along the Kane Fracture Zone and to interpret uplift history of the Bermuda Rise. Sediments within the fracture valley thin seaward on younger crust and with distance from continental sources. Superposed on this pattern are the effects of local and regional basement structure, variations in surface-water productivity, influence of bottom currents, and local effects of sediment redistribution. Preservation of a thicker and more complete sedimentary record within the Kane fracture valley facilitates identification and eastward correlation of seismic reflections, and we have cross-correlated these eflections to synthesize an along-axis transect of the fracture zone. Stratigraphic correlations of key reflections to Deep Sea Drilling Project drill sites determine the composition and ages of the lithologic sequences. Observed pinch-outs of seismic horizons J1, β, and A* on fracture-valley crust extend significantly seaward of previously mapped limits, and the younger pinch-out ages accord better with ages defined by deep-sea drilling.Paleosedimentation patterns in successive stratigraphic intervals document the growth of the continental margin/basin sedimentary prism from Late Jurassic time and the uplift of the Bermuda Rise beginning in middle Eocene time. Middle Eocene cessation of turbidite deposition atop the Rise, as identified by Horizon At, marks initiation of regional uplift. A seismic discontinuity in turbidite ponds east of the Rise records a probable pulse of uplift during early Oligocene time. Structure of the overlying seismic reflection sequence suggests continued uplift, albeit at decreasing rates, through the late Oligocene and possibly through Miocene time. The anomalous elevation of the Rise subsequently has been maintained, but there is no clear stratigraphic evidence for further growth.Turbidite ponds fill the Kane fracture valley east of the Bermuda Rise and terminate against a prominent structural dam at 55°20′W. These ponds began to fill with turbidites in middle Eocene to early Oligocene time, and the sediments were derived from local sources. Within the past 10-12 m.y., turbidity currents began to enter the ponds through connections with the encroaching Nares Abyssal Plain, and they probably now constitute the dominant sediment source for the fracture valley. This content is PDF only. Please click on the PDF icon to access. First Page Preview Close Modal You do not have access to this content, please speak to your institutional administrator if you feel you should have access.