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Age and petrographic characterization of volcanic ash from ODP Leg 198 and Le...
In this study of volcanic ash retrieved from Shatsky Rise during Ocean Drilling Program Leg 198, the texture and composition of the volcanic components (glass and crystals) were... -
Geochemistry of Pliocene-Pleistocene volcanic rocks from the Izu Arc
The igneous geochemistry of lavas and breccias from the basement of Sites 790 and 791, and pumice clasts from the Pliocene-Pleistocene sedimentary section of Sites 788, 790,... -
Geochemistry of oceanic arc basement rocks of Sumisu Rift and Ohmachi Seamount
Prehnite-pumpellyite facies metamorphism is described in the oceanic-arc basement rocks of Ocean Drilling Program Leg 126, Site 791 in the Sumisu Rift, western Pacific. Chemical... -
Amino acids in interstitial waters from ODP Sites 126-790 and 126-791
Sites 790 and 791 lie in the eastern half graben of the Sumisu Rift, a backarc graben west of the active Izu-Bonin arc volcanoes Sumisu Jima and Tori Shima, at 30°54.96'N,... -
Geochemistry of volcanic rocks of ODP Holes 126-792E and 126-793B
The Izu-Bonin forearc basement volcanic rocks recovered from Holes 792E and 793B show the same phenocrystic assemblage (i.e., plagioclase, two pyroxenes, and Fe-Ti oxides... -
Geochemistry of pelagic and hemipelagic sediments of ODP Leg 126 sites
Chemical analyses were performed on major, minor, and rare-earth elements of pelagic and hemipelagic sediments of the forearc, arc, and backarc sites of the Izu-Bonin Arc, Ocean... -
Geochemistry of sands and sandstones in ODP Leg 126 sites
During Ocean Drilling Program Leg 126, six sites were cored in a young backarc rift basin and its flanks (rift onset 1.1-3.56 Ma) and in the forearc basin of the Izu-Bonin Arc.... -
Chemical composition of glass inclusions of volcanic rocks from the Bonin Arc
The chemical composition of glass inclusions in phenocrystic plagioclase and pyroxene from Sites 792 and 793, drilled during Ocean Drilling Program Leg 126 in the Bonin Arc, is... -
Geochemistry and structural formulas of heavy minerals from sands and sandsto...
Lower Oligocene to Pleistocene volcaniclastic sands and sandstones recovered around the Izu-Bonin Arc during Ocean Drilling Program Leg 126 were derived entirely from Izu-Bonin... -
Mineralogy of volcaniclastic sands from the Izu-Bonin Arc
Modal compositions of volcaniclastic sands recovered on Leg 126 of the Ocean Drilling Project (Izu-Bonin island arc and Sumisu Rift) are similar to those from other intraoceanic... -
Composition of ODP Leg 126 sandstones
Early diagenesis in Leg 126 forearc and backarc sands/sandstones is characterized by the dissolution of intermediate to mafic brown glass, the alteration of colorless rhyolitic... -
Sedimentology of ODP Leg 126 deep-water volcaniclastics
Three sites were drilled in the Izu-Bonin forearc basin during Ocean Drilling Program (ODP) Leg 126. High-quality formation microscanner (FMS) data from two of the sites provide... -
Chemistry of Pliocene-Pleistocene pumice from the Izu-Bonin Arc
Thick pumice deposits were found in the cored sequences of forearc, arc, and backarc sites of Leg 126 in the Izu-Bonin Arc. These deposits, composed of fragmental rhyolite... -
Geochemistry of glass shards in the volcanic ash layers of the Izu-Bonin Arc
To examine the processes and histories of arc volcanism and of volcanism associated with backarc rifting. 130 samples containing igneous glass shards were taken from the... -
Petrology and geochemistry of the Izu-Bonin Forearc tephras
Numerous marine tephra layers cored at Sites 792 and 793 in the Izu-Bonin forearc region offer additional information about the timing and spatial characteristics of arc... -
Petrology and geochemistry of Quaternary tephras of the Izu-Bonin Arc
Quaternary marine tephras in the Izu-Bonin Arc offer significant information about explosive volcanic activities of the arc. Visual core descriptions, petrographic examinations,... -
Radiolarians of the Izu-Bonin Region
Radiolarians occur at five Leg 126 sites. Well-preserved radiolarians were recovered from Miocene and Pliocene through Holocene sections. The results of this study may help to... -
Eocene to Quaternary benthic foraminifers from the Izu-Bonin Arc
The benthic foraminifer fauna at Sumisu Rift Sites 790 and 791 indicates that a deep open-ocean (>2300 m) or a basin with open-ocean access existed between 1.1 and 0.7 Ma at... -
Eocene to Quaternary planktonic foraminifers from the Northwest Pacific
Eocene through Quaternary planktonic foraminifers were identified in cores recovered during Leg 126. Turbidites and volcanic ash beds are intercalated with hemipelagic... -
Calcareous nannofossils from the Sumisu Rift and Izu-Bonin Forearc Basin
During Ocean Drilling Program Leg 126, we recovered three expanded Pleistocene sections from the active backarc rift (Sumisu Rift) and three expanded Oligocene-Miocene sections...