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  • 1
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    Geochemical analyses from the Boninite suite lavas and the Izu-Bonin forearc from IODP Hole 352-U1439A and 352-U1442A (2020)
    PANGAEA
    Details
    Publication Date: 2023-06-03
    Description: Whole rock geochemical analyses of nonfinite suite lavas sampled during IODP Expedition 352 at two sites: U1439C and U1442A. These sites lie in the Izu-Bonin forearc, NE of Chichijima (Bonin Island). The major elements and select trace elements analyzed the X-ray fluorescence spectrometry, other trace elements including the Rare Earth Elements (REE) analyzed by ICP-MS. CO2 was analyzed with a Costech Elemental Analyzer and used to correct major elements for secondary calcite content.
    Keywords: 352-U1439C; 352-U1442A; Aluminium oxide; Barium; boninite; Calcium oxide; Calculated; Carbon dioxide; CDRILL; Cerium; Chromium; CO2 * 56/44; Cobalt; Code; Core drilling; Corrected for Calcium carbonate; DEPTH, sediment/rock; DSDP/ODP/IODP sample designation; Dysprosium; Element analyser CHN, Costech; Erbium; Europium; Event label; EXP352; Gadolinium; Hafnium; high-Mg andesite; Holmium; IBM; Inductively coupled plasma - mass spectrometry (ICP-MS); Integrated Ocean Drilling Program / International Ocean Discovery Program; IODP; IODP Expedition 352; Iron oxide, Fe2O3; Iron oxide, FeO; Izu-Bonin arc; Izu-Bonin-Mariana fore arc; Joides Resolution; JOIDES Resolution; Lanthanum; Lead; Lithologic unit/sequence; Lutetium; Magnesium/Iron ratio; Magnesium oxide; Main Lithology; Manganese oxide; Neodymium; Nickel; Niobium; Phosphorus; Phosphorus pentoxide; Potassium; Potassium oxide; Praseodymium; Rubidium; Samarium; Sample code/label; Sample comment; Sample ID; Scandium; Silicon dioxide; Sodium oxide; Strontium; Sum; Terbium; Thorium; Thulium; Titanium; Titanium dioxide; Uranium; Vanadium; X-ray fluorescence (XRF); XRF analyses normalized to 100%; Ytterbium; Yttrium; Zirconium
    Type: Dataset
    Format: text/tab-separated-values, 4646 data points
    Location Call Number Limitation Availability
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    DATA PANGAEA
  • 2
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    Whole rock geochemistry of Forearc Basalts from IODP Expedition 352 (2018)
    PANGAEA
    In:  Supplement to: Shervais, John W; Reagan, Mark; Haugen, Emily; Almeev, Renat; Pearce, Julian; Prytulak, Julie; Ryan, Jeffrey G; Whattam, Scott Andrew; Godard, Marguerite; Chapman, Timothy; Li, Hongyan; Kurz, Walter; Nelson, Wendy R; Heaton, Daniel; Kirchenbaur, Maria; Shimizu, Kenji; Sakuyama, Tetsuya; Li, Yibing; Vetter, Scott K (2018): Magmatic Response to Subduction Initiation, Part I: Forearc basalts of the Izu-Bonin Arc from IODP Expedition 352. Geochemistry, Geophysics, Geosystems, 19, https://doi.org/10.1029/2018GC007731
    Details
    Publication Date: 2023-07-10
    Description: These basalts represent the earliest response to subduction initiation in the Izu-Bonin arc system during the early Eocene. They are highly refractory and formed by high degrees of partial melting of a previously depleted source.
    Keywords: 352-U1440A; 352-U1440B; 352-U1441A; Aluminium oxide; Barium; Calcium oxide; Calculated from weight loss after ignition at 450 °C; CDRILL; Cerium; Chromium; Cobalt; Core drilling; DEPTH, sediment/rock; Dysprosium; Erbium; Europium; Event label; Event layer type; EXP352; Gadolinium; Hafnium; Holmium; IBM; ICP-MS; Integrated Ocean Drilling Program / International Ocean Discovery Program; IODP; Iron oxide, Fe2O3; Iron oxide, FeO; Izu-Bonin-Mariana fore arc; Joides Resolution; Lanthanum; Lead; Loss on ignition; Lutetium; Magnesium oxide; Manganese oxide; Mass; Neodymium; Nickel; Niobium; Phosphorus pentoxide; Potassium; Potassium oxide; Praseodymium; Rubidium; Samarium; Sample code/label; Sample ID; Scandium; Silicon dioxide; Sodium oxide; Strontium; Sum; Tantalum; Terbium; Thorium; Thulium; Titanium; Titanium dioxide; Unit; Uranium; Vanadium; X-ray fluorescence (XRF); Ytterbium; Yttrium; Zirconium
    Type: Dataset
    Format: text/tab-separated-values, 3494 data points
    Location Call Number Limitation Availability
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    DATA PANGAEA
  • 3
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    Subduction initiation and ophiolite crust: new insights from IODP drilling (2017)
    Taylor & Francis
    In:  International Geology Review, 59 (11). pp. 1439-1450.
    Details
    Publication Date: 2020-02-06
    Description: International Ocean Discovery Program (IODP) Expedition 352 recovered a high-fidelity record of volcanism related to subduction initiation in the Bonin fore-arc. Two sites (U1440 and U1441) located in deep water nearer to the trench recovered basalts and related rocks; two sites (U1439 and U1442) located in shallower water further from the trench recovered boninites and related rocks. Drilling in both areas ended in dolerites inferred to be sheeted intrusive rocks. The basalts apparently erupted immediately after subduction initiation and have compositions similar to those of the most depleted basalts generated by rapid sea-floor spreading at mid-ocean ridges, with little or no slab input. Subsequent melting to generate boninites involved more depleted mantle and hotter and deeper subducted components as subduction progressed and volcanism migrated away from the trench. This volcanic sequence is akin to that recorded by many ophiolites, supporting a direct link between subduction initiation, fore-arc spreading, and ophiolite genesis.
    Type: Article , PeerReviewed
    Format: text
    DOI: 10.1080/00206814.2016.1276482
    Location Call Number Limitation Availability
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    OceanRep: Article in a Scientific Journal - peer-reviewed
  • 4
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    Geochemistry and Age of Shatsky, Hess, and Ojin Rise seamounts: Implications for a connection between the Shatsky and Hess Rises (2016)
    Elsevier
    In:  Geochimica et Cosmochimica Acta, 185 . pp. 302-327.
    Details
    Publication Date: 2019-09-23
    Description: Shatsky Rise in the Northwest Pacific is the best example so far of an oceanic plateau with two potential hotspot tracks emanating from it: the linear Papanin volcanic ridge and the seamounts comprising Ojin Rise. Arguably, these hotspot tracks also project toward the direction of Hess Rise, located ∼1200 km away, leading to speculations that the two plateaus are connected. Dredging was conducted on the massifs and seamounts around Shatsky Rise in an effort to understand the relationship between these plateaus and associated seamounts. Here, we present new 40Ar/39Ar ages and trace element and Nd, Pb, and Hf isotopic data for the recovered dredged rocks and new trace elements and isotopic data for a few drill core samples from Hess Rise. Chemically, the samples can be subdivided into plateau basalt-like tholeiites and trachytic to alkalic ocean-island basalt compositions, indicating at least two types of volcanic activity. Tholeiites from the northern Hess Rise (DSDP Site 464) and the trachytes from Toronto Ridge on Shatsky’s TAMU massif have isotopic compositions that overlap with those of the drilled Shatsky Rise plateau basalts, suggesting that both Rises formed from the same mantle source. In contrast, trachytes from the southern Hess Rise (DSDP Site 465A) have more radiogenic Pb isotopic ratios that are shifted toward a high time-integrated U/Pb (HIMU-type mantle) composition. The compositions of the dredged seamount samples show two trends relative to Shatsky Rise data: one toward lower 143Nd/144Nd but similar 206Pb/204Pb ratios, the other toward similar 143Nd/144Nd but more radiogenic 206Pb/204Pb ratios. These trends can be attributed to lower degrees of melting either from lower mantle material during hotspot-related transition to plume tail or from less refractory shallow mantle components tapped during intermittent deformation-related volcanism induced by local tectonic extension between and after the main volcanic-edifice building episodes on Shatsky Rise. The ocean-island-basalt-like chemistry and isotopic composition of the Shatsky and Hess rise seamounts contrast with those formed by purely deformation-related shallow mantle-derived volcanism, favoring the role of a long-lived mantle anomaly in their origin. Finally, new 40Ar/39Ar evidence indicates that Shatsky Rise edifices may have been formed in multiple-stages and over a longer duration than previously believed.
    Type: Article , PeerReviewed
    Format: text
    Format: text
    Format: text
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    Format: other
    Format: other
    Format: text
    DOI: 10.1016/j.gca.2016.04.006
    Location Call Number Limitation Availability
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    OceanRep: Article in a Scientific Journal - peer-reviewed
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