Isotope and trace element characteristics of a super-fast spreading ridge: East Pacific rise, 13–23°S

Mahoney, John J.; Sinton, John M.; Kurz, Mark D.; MacDougall, J. D.; Spencer, Khalil J.; Lugmair, G. W.

doi:10.1016/0012-821x(94)90039-6

Cited by 225 publications

(152 citation statements)

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“…Site 1213 data are from Mahoney et al (2005). OJP = Ontong Java Plateau (data of Tejada et al, 1996Tejada et al, , 2002Fitton and Godard, 2004), EPR = East Pacific Rise (data of Sinton et al, 1991;Bach et al, 1994;Mahoney et al, 1994). high content of zeolite and volcaniclastics; they display cross-bedding and intense bioturbation and contain a neritic (<200 m water depth) assemblage of benthic foraminifera.…”

Section: Drilling Overviewmentioning

confidence: 99%

IODP Expedition 324: Ocean Drilling at Shatsky Rise Gives Clues about Oceanic Plateau Formation

Sager

Sano

Geldmacher

2011

Scientific Drilling

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Integrated Ocean Drilling Program (IODP) Expedition 324 cored Shatsky Rise at five sites (U1346-U1350) to study processes of oceanic plateau formation and evolution. Site penetrations ranged from 191.8 m to 324.1 m with coring of 52.6 m to 172.7 m into igneous basement at four of the sites. Average recovery in basement was 38.7%-67.4%. Cored igneous sections consist mainly of variably evolved tholeiitic basalts emplaced as pillows or massive flows. Massive flows are thickest and make up the largest percentage of section on the largest and oldest volcano, late Jurassic age Tamu Massif; thus, it may have formed at high effusion rates. Such massive flows are characteristic of flood basalts, and similar flows were cored at Ontong Java Plateau. Indeed, the similarity of igneous sections at Site U1347 with that cored on Ontong Java Plateau implies similar volcanic styles for these two plateaus. On younger, smaller Shatsky Rise volcanoes, pillow flows are common and massive flows thinner and fewer, which might mean volcanism waned with time. Cored sediments from summit sites contain fossils and structures implying shallow water depths or emergence at the time of eruption and normal subsidence since. Summit sites also show pervasive alteration that could be due to high fluid fluxes. A thick section of volcaniclastics cored on Tamu Massif suggests that shallow, explosive submarine volcanism played a significant role in the geologic development of the plateau summit. Expedition 324 results imply that Shatsky Rise began with massive eruptions forming a huge volcano and that subsequent eruptions waned in intensity, forming volcanoes that are large, but which did not erupt with unusually high effusion rates. Similarities of cored sections on Tamu Massif with those of Ontong Java Plateau indicate that these oceanic plateaus formed in similar fashion.

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Section: Drilling Overviewmentioning

confidence: 99%

IODP Expedition 324: Ocean Drilling at Shatsky Rise Gives Clues about Oceanic Plateau Formation

Sager

Sano

Geldmacher

2011

Scientific Drilling

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“…Principal MORB data sources include those 1988; Klein et al, 1988;le Roex et al, 1989;Mahoney cited in the text, plus Ito et al (1987), White et al (1987), Hanan & et al, 1989Hanan & et al, , 1992Storey et al, 1989Storey et al, , 1992Pyle et al, Schilling (1989), Dosso et al (1993), Bach et al (1994), Mahoney et al (1994), and other recent studies cited therein. 1992, 1995Weis et al, 1992;Hickey-Vargas et al, 1995;Rehkämper & Hofmann, 1997).…”

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confidence: 99%

Tracing the Indian Ocean Mantle Domain Through Time: Isotopic Results from Old West Indian, East Tethyan, and South Pacific Seafloor

Mahoney

Frei

Tejada

et al. 1998

Journal of Petrology

269

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“…Shown for comparison are data for dredge samples from the length of the Louisville Seamount Trail (only data for dredge samples with LOI < 6 wt% are included; data of Hawkins et al, 1987;Vanderkluysen et al, 2007;Beier et al, 2011). Also shown are fields for the southern East Pacific Rise (EPR; data of Sinton et al, 1991;Bach et al, 1994;Mahoney et al, 1994), and Ontong Java Plateau (OJP; data of Tejada et al, 1996Tejada et al, , 2002Fitton and Godard, 2004). Figure F41.…”

Section: Expedition 330 Scientists Site U1373mentioning

confidence: 99%

“…"Hawaii postshield" fields include Lapahoehoe and Hamakua lavas (data of Frey et al, 1990;West et al, 1988). Also shown are fields for the southern East Pacific Rise (EPR; data of Sinton et al, 1991;Bach et al, 1994;Mahoney et al, 1994), and Ontong Java Plateau (OJP; data of Tejada et al, 1996Tejada et al, , 2002Fitton and Godard, 2004). Figure F46.…”

Section: Expedition 330 Scientists Site U1373mentioning

confidence: 99%

Site U1373

2012

Proceedings of the IODP

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Isotope and trace element characteristics of a super-fast spreading ridge: East Pacific rise, 13–23°S

Cited by 225 publications

References 47 publications

IODP Expedition 324: Ocean Drilling at Shatsky Rise Gives Clues about Oceanic Plateau Formation

IODP Expedition 324: Ocean Drilling at Shatsky Rise Gives Clues about Oceanic Plateau Formation

Tracing the Indian Ocean Mantle Domain Through Time: Isotopic Results from Old West Indian, East Tethyan, and South Pacific Seafloor

Site U1373

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