Evidence for age and evolution of Corner Seamounts and Great Meteor Seamount Chain from multibeam bathymetry

Tucholke, Brian E.; Smoot, N. Christian

doi:10.1029/jb095ib11p17555

Cited by 38 publications

(46 citation statements)

References 29 publications

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“…Our work was justified by the location of the study area in relation to the Azores Islands and adjacent seamounts. Some of these latter seamounts were exposed during the Cenozoic (Tucholke and Smoot, 1990;Weaver et al, 1998), suggesting that they should have led to the deposition of an archipelagic apron (sensu Menard, 1964) in the study area, as proposed by Emery and Uchupi (1984). Thus, it was considered necessary to obtain new seismic and sidescan information on the latter apron since its lateral extent, thickness and sub-surface structure have only been investigated using vintage seismic reflection data of relatively shallow penetration (Emery and Uchupi, 1984;Verhoef, 1985;Verhoef and Collette, 1985).…”

Section: Introductionmentioning

confidence: 96%

Surveying the flanks of the Mid-Atlantic Ridge: the Atlantis Basin, North Atlantic Ocean (36°N)

et al. 2004

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Section: Introductionmentioning

confidence: 96%

Surveying the flanks of the Mid-Atlantic Ridge: the Atlantis Basin, North Atlantic Ocean (36°N)

et al. 2004

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“…Below the disconformity at 26.5 Ma, the pelagic sediment consists of red clays with occasional volcanic ash layers, presumably derived from the volcanoes of the Great Meteor Seamount Chain, which were active during this time (Tucholke and Smoot, 1990). These ash layers and disseminated volcaniclastic debris in the red clays (Shipboard Scientific Party, 1995a) caused higher pelagic accumulation rates of 1.6 m/m.y.…”

Section: Pelagic Sediment Accumulation Ratesmentioning

confidence: 99%

Calcareous nannofossil biostratigraphy and sediment accumulation of turbidite sequences on the Madeira Abyssal Plain, Sites 950-952

Howe¹,

Sblendorio-Levy²

1998

Proceedings of the Ocean Drilling Program, 157 Scientific Results

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Drilling on the Madeira Abyssal Plain during Leg 157 penetrated deep into the sequence of interbedded turbidites and pelagic sediments that underlie the plain. The turbidites generally have abundant and well-preserved calcareous nannofossil assemblages, with the interbedded pelagic sediments having variable preservation and abundance of nannofossils dependent on CaCO 3 content. Poor preservation in pelagic sediments from the Paleogene and Miocene necessitated the use of nannofossil datums from turbidites to construct a consistent biostratigraphy.Site 950 records Neogene turbidite deposition of organic carbon-rich, volcaniclastic-rich, and highly calcareous turbidites from different sources around the plain with thin interbedded pelagic red clays, marls, and oozes. A disconformity separates the upper part of Zone CN3 from a single turbidite belonging to Zone CN2, below which a major disconformity separates Zone CN2 from Subzone CP19b, at the top of the Oligocene. Throughout the Oligocene and late Eocene, down to Subzone CP15a, the sequence comprises thin calcareous turbidites and thick pelagic red clays. Sites 951 and 952 only penetrated as deep as Zone CN3 and have similar sequences to the Neogene section of Site 951. Total sediment and pelagic sediment accumulation rates have varied dramatically with time, with low rates in the Paleogene section of Site 950 rising significantly throughout the Neogene. Sites 951 and 952 have much higher rates in the lower and middle Miocene than Site 950, above which all three sites have broadly similar rates.

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“…A flat top of a seamount is one of the geomorphic features which are usually thought to originate at or near sea level (TUCHOLKE and SMOOT, 1990). Bevelling of seamount crests at wave base, which is often accompanied by reef growth, is a well documented phenomenon in the Pacific (e.g., HAMILTON, 1956;SCHLANGER et al, 1987;WINTERER et al, 1992;VAN WAASBERGEN and WINTERER, 1992;LINCOLN et al, 1992).…”

Section: Age Estimation For Guyot Seamountsmentioning

confidence: 99%

“…Linear chains of oceanic islands and seamounts have attracted considerable attention because such lines may record the passage of the lithosphere over fixed volcanic sources in the deep earth (MORGAN, 1971;DUNCAN, 1981DUNCAN, , 1984SAGER and KEATING, 1984;PRINGLE, 1987, 1988;TUCHOLKE and SMOOT, 1990;PRINGLE, 1992). The linear chains of oceanic islands and/or seamounts need to be studied in detail in order to establish their origin of formation, and thus to know whether they record the passage of the lithosphere over a fixed volcanic source or not.…”

Section: Introductionmentioning

confidence: 99%

Paleomagnetism of the Joban Seamount Chain, Northwestern Pacific.

Masalu

Tamaki

Kobayashi

1993

J. geomagn. geoelec

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We conducted a detailed bathymetric and magnetic total force survey of five seamounts in the Joban seamount chain during cruise KH90-1 of the R/V HAKUHO MARU in 1990. The Joban seamount chain is situated to the east of the southern Japan Trench, trends along N53°E (oblique to magnetic anomaly lineations whose trend is N68°E) and extends over a distance of about 394 km. We applied three-dimensional magnetic inversion to each seamount. The three northern seamounts show relatively complex magnetization structures, whereas the two southern seamounts show simple magnetization structures. The latter yielded reliable results with VGPs (Virtual geomagnetic pole) at 55.5°N/348.9°E and 52.1°N/352.4°E. We estimated the ages of the two southern seamounts to be ca. 80 to 90 Ma by comparing their VGPs with known Pacific plate apparent polar wander path. We also estimated the ages for two guyot seamounts in the northern group to be ca. 110 to 130 Ma by backtracking their crests along crustal age-depth curve to sea level. The Joban seamount chain apparently shows presence of at least two groups of inclinations. This suggests that the origin of this seamount chain is not the passage of the Pacific plate over a single stationary hotspot.

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Evidence for age and evolution of Corner Seamounts and Great Meteor Seamount Chain from multibeam bathymetry

Cited by 38 publications

References 29 publications

Surveying the flanks of the Mid-Atlantic Ridge: the Atlantis Basin, North Atlantic Ocean (36°N)

Surveying the flanks of the Mid-Atlantic Ridge: the Atlantis Basin, North Atlantic Ocean (36°N)

Calcareous nannofossil biostratigraphy and sediment accumulation of turbidite sequences on the Madeira Abyssal Plain, Sites 950-952

Paleomagnetism of the Joban Seamount Chain, Northwestern Pacific.

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