Geochemistry and Geochronology of Leg 130 Basement Lavas: Nature and Origin of the Ontong Java Plateau

Mahoney, John J.; Storey, Michael; Duncan, Robert A.; Spencer, Khalil J.; Pringle, Malcolm S.

doi:10.2973/odp.proc.sr.130.040.1993

Cited by 68 publications

(49 citation statements)

References 1 publication

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…These theoretical models seem to be supported by the composition of lavas from oceanic plateaus, such as OJP (e.g. Mahoney et al, 1993), Hikurangi Plateau (Timm et al, 2011), the Caribbean-Columbian plateau (e.g. Hauff et al, 2000) and Shatsky Rise (e.g., Heydolph et al, 2014), which show little geochemical variation, have largely intermediate composition between MORB, HIMU and EM, and are similar to each other and similar to the assumed composition of the lower mantle (e.g.…”

Section: Accepted M Manuscriptmentioning

confidence: 80%

“…Some oceanic plateaus, such as the enormous Ontong Java Plateau (OJP), appear to have formed rapidly (a few Myr) (Tarduno et al, 1991;Mahoney et al, 1993;Tejada et al, 1996;, implying immense volcanic eruptions with global impact (Larson, 1991;Coffin and Eldholm, 1994). Others, such as Kerguelen-Broken Ridge or the Caribbean LIP, seemed to have assembled over longer time periods (Coffin et al, 2002;Hoernle et al, 2004).…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Formation and evolution of Shatsky Rise oceanic plateau: Insights from IODP Expedition 324 and recent geophysical cruises

Sager

Sano

Geldmacher

2016

Earth-Science Reviews

View full text Add to dashboard Cite

Section: Accepted M Manuscriptmentioning

confidence: 80%

Section: Introductionmentioning

confidence: 99%

Formation and evolution of Shatsky Rise oceanic plateau: Insights from IODP Expedition 324 and recent geophysical cruises

Sager

Sano

Geldmacher

2016

Earth-Science Reviews

View full text Add to dashboard Cite

“…The first one, around 61.0 Ma, amounting to some 2 Mkm 3 in total volume, developed in western Greenland, southeastern Greenland (and possibly between the two below the ice), and northwest Britain (e.g., [43,68,104,172,173]). The second one (even larger) corresponds to breakup at 56 Ma and is found in both eastern Greenland and the Faroes, along part of the then nascent North Atlantic margin, but also in Baffin Bay west of Greenland [57,113]. The former shares the characteristics of many other provinces in having recorded few reversals and being confined in time to a total duration of the order of 1-2 Ma (note however that the volume estimate is subject to the presence of flood basalts below the ice sheet connecting the eastern-and western-coast outcrops, which is debated; Laurent Geoffroy, pers.…”

Section: The Brito-arctic Provincementioning

confidence: 96%

On the ages of flood basalt events

Courtillot

Renne

2003

Comptes Rendus. Géoscience

736

400

View full text Add to dashboard Cite

We review available data constraining the extent, volume, age and duration of all major Phanerozoic continental flood basalts (CFB or traps) and oceanic plateaus (OP), together forming the group of large igneous provinces (LIP), going from the smallest Columbia flood basalts at ∼16 Ma to the as yet ill-known remnants of a possible trap at ∼360 Ma in eastern Siberia. The 16 traps (CFB and OP) reviewed form a rather unimodal distribution with an initial modal volume of the order of 2.5 Mkm 3 . Most provinces agree with a rather simple first order model in which volcanism may have lasted of the order of 10 Ma, often resulting in continental break-up, but where most of the volume was erupted in about 1 Ma or sometimes less. This makes CFBs/OPs (LIPs) major geodynamic events, with fluxes exceeding the total output of present day hot spots and even possibly exceeding over short times the entire crustal production of mid-ocean ridges. The proposed correlation between trap ages and the ages of several geological events, including mass extinctions and oceanic anoxia, is found to have improved steadily as more data have become available, to the point that the list of trap ages may coincide with many major divisions in the geological time scale. The four largest mass extinctions in the last 260 Ma coincide to the best resolution available with four traps, making a causal connection between the two through some form of catastrophic climatic perturbations the most likely hypothesis. The time sequence of LIPs appears to have been random and there is no robust evidence for long time trends in the corresponding crustal production rate over the last 260 Ma.  2003 Académie des sciences/Éditions scientifiques et médicales Elsevier SAS. All rights reserved. RésuméNous passons en revue l'ensemble des données qui permettent de contraindre l'étendue, le volume, l'âge et la durée de toutes les grandes provinces magmatiques basaltiques (en anglais LIP) d'âge Phanérozoïque, qu'il s'agisse des trapps ou plateaux basaltiques continentaux (en anglais CFB) ou des plateaux océaniques (OP), allant de la plus récente et plus petite (le plateau de Columbia âgé de ∼16 Ma) à l'une des plus anciennes, encore mal connue, située dans l'Est de la Sibérie et sans doute âgée de ∼360 Ma. Les 16 provinces passées en revue forment une distribution assez unimodale, avec des volumes initiaux de lave de l'ordre de 2,5 Mkm 3 . La plupart des provinces sont compatibles, au premier ordre, avec un modèle simple selon lequel le volcanisme a pu durer une dizaine de millions d'années et a en général conduit à une déchirure des continents et à l'ouverture d'un nouveau bassin océanique, mais où l'essentiel du volume des laves a été émis en environ 1 million d'années, parfois moins. Ceci fait des trapps (des LIP en général) des événements géodynamiques majeurs, avec des flux de matière ayant dépassé la production totale actuelle des points chauds et même, peut-être, pendant de brefs intervalles, la totalité de la production de croûte V.E. Courtillot, P.R. Renn...

show abstract

“…A significant amount of shortening of the proto-Caribbean realm (i.e., Colombian Marginal Seaway) is therefore required, to produce the previously described finite strain pattern. Albian-Aptian time was one of major plateau-forming events in the Pacific [Mahoney et al, 1993;Kerr et al, 1997] and it is now widely accepted that the CCOP consists of material of broadly different ages: an Aptian age (124-112 Ma) phase, a 91-83 Ma phase (the most voluminous) and a 78-72 Ma phase [Lapierre et al, 2000;Blein et al, 2003;Kerr et al, 2003]. We suggest that the synmetamorphic thrust tectonics, and related D1 and D2 fold systems, we discovered in La Désirade Island are a record of the collision of the early Pacific plateau against the island arc located at the protoCaribbean-Pacific boundary during Lower Cretaceous.…”

Section: Tectonic Evolution Of La Désirade: a Key Aspect Of Caribbeanmentioning

confidence: 99%

Discovery of Lower Cretaceous synmetamorphic thrust tectonics in French Lesser Antilles (La Désirade Island, Guadeloupe): Implications for Caribbean geodynamics

et al. 2011

View full text Add to dashboard Cite

[1] Located east of Guadeloupe, the island of La Désirade exhibits the oldest rocks of the Lesser Antilles arc and the eastern Caribbean plate. An old magmatic basement is composed of (1) late Jurassic ophiolitic complex with meta-basaltic pillow lavas and interbedded radiolarites, (2) acid igneous complex comprising meta-quartz-diorite and meta-rhyolitic lavas flows, and (3) meta-diabasic/microdioritic dyke swarm complex. We present and discuss the discovery of synmetamorphic thrust tectonics in this island. Based on detailed structural analysis we evidenced two main compressive events. The first event (D1) is characterized by pervasive folding associated with thrust development. In the northeastern part of the island, a major thrust fault, the Grand Abaque Thrust, has been discovered which displaces for several kilometers the acid igneous complex onto the ophiolitic unit. The second deformation event (D2) is featured by a main pervasive cleavage S2 observed at the regional scale associated with upright folding (F2) and by the development of two sets of conjugated steeply dipping strike-slip shear zones, dextral 130°N and sinistral 20°N striking, respectively. Microstructural observations indicate that Greenschist facies metamorphism is clearly contemporaneous with the development of D1 and D2 superimposed tectonic structures. Ar/Ar geochronology was performed on two bulk of adularia minerals sampled in the northeast volcanic complex within a deformed zone related to a D2 event. These analyses yield well-defined and concordant plateau ages at 106.2 ± 1.7 Ma and 107.2 ± 1.8 Ma. Thus, shortening and thickening tectonics occurred during Lower Cretaceous (Albian). In the available framework of Caribbean geodynamics, the synmetamorphic thrust tectonics we discovered in the French Lesser Antilles is related to the collision between an Aptian-Albian oceanic plateau and the Andean-Cordilleran east-dipping subduction zone. Our results support subduction polarity reversal during Lower Cretaceous.

show abstract

Geochemistry and Geochronology of Leg 130 Basement Lavas: Nature and Origin of the Ontong Java Plateau

Cited by 68 publications

References 1 publication

Formation and evolution of Shatsky Rise oceanic plateau: Insights from IODP Expedition 324 and recent geophysical cruises

Formation and evolution of Shatsky Rise oceanic plateau: Insights from IODP Expedition 324 and recent geophysical cruises

On the ages of flood basalt events

Discovery of Lower Cretaceous synmetamorphic thrust tectonics in French Lesser Antilles (La Désirade Island, Guadeloupe): Implications for Caribbean geodynamics

Contact Info

Product

Resources

About