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Analysis of manganes nodules from the Antarctic Ocean
Five nodules collected on Leg 28 of the Deep Sea Drilling Project are unique in that they provide an opportunity of studying older, buried nodules. Paleontological evidence from... -
Analysis of manganes deposits of Leg 23
Located on the Arabian Abyssal Plain near its southernmost termination, this site recorded continuous Middle Eocene through Pleistocene deep-water sedimentation above oceanic... -
Sedimentology of sites 14-141, 41-366, 47-397 and 79-544B
Along the N-S-transect of DSDP-Sites 5446, 397, 141, and 366, oxygen and carbon isotopes, flux rates of calcium carbonate, terrigenous matter, and biogenic opal, clay minerals... -
Nitrogen isotopes of bulk sediments for OAE2 samples
Sediment records of the stable isotopic composition of N (d15N) show light d15N values at several sites in the proto-North Atlantic during Oceanic Anoxic Event 2 (OAE 2) at the... -
Stable isotope record of Cretaceous samples of DSDP Hole 71-511
Oxygen isotope data for upper Turonian planktonic foraminifera at Deep Sea Drilling Project Site 511 (Falkland Plateau, 60°S paleolatitude) exhibit an ~2 per mil excursion to... -
Stable carbon isotopic composition of biomarker lipids of DSDP Hole 31-302
The middle Paleocene through early Eocene long-term gradual warming was superimposed by several transient warming events, such as the Paleocene-Eocene Thermal Maximum (PETM) and... -
Biogenic sedimentation of DSDP Site 85-574
The equatorial Pacific is an important part of the global carbon cycle and has been affected by climate change through the Cenozoic (65 Ma to present). We present a Miocene... -
Velocity-density systematics for basalts at DSPD Leg 54 Holes
Precise velocity and density measurements at atmospheric and elevated pressures have been obtained on basalts drilled in 13 holes during Leg 54. The vp-sigma data show... -
Silicate mineralogy of basalts at DSDP Leg 54 Holes
Basalts drilled from the East Pacific Rise, OCP Ridge, and Siqueiros fracture zone during Leg 54 are texturally diverse. Dolerites are equigranular at Sites 422 and 428 and... -
Composition and origin of sediments at DSDP Site 54-424
The sediments recovered on Deep Sea Drilling Project Leg 54 appear to be mixtures of the normal pelagic sediments of the area and hydrothermally produced manganese and iron... -
Sedimentology, mineralogy, and geochemistry of hydrothermal deposits at DSDP ...
On Leg 54 of the Deep Sea Drilling Project, four holes were drilled at Site 424, about 20 km south of the Galapagos Spreading Center (GSC). The holes were situated less than 300... -
Sediment grain size and carbon/carbonate at DSDO Leg 55 Holes
CaCO3 content was determined on board ship by the "Karbonat Bomb" technique (Müller and Gastner, 1971). In this simple procedure, a sample is powdered and treated with HCl in a... -
Geochemistry and ages at DSDP Hole 19-192A
Conventional K-Ar and 40Ar/39Ar age data on altered basalts from DSDP Hole 192A on Meiji Guyot, Emperor Seamount chain, indicate a minimum age for the volcano of 61.9 ± 5.0 m.y.... -
Conventional and 40Ar/39Ar K-Ar ages of volcanic rocks at DSDP Leg 55 Holes
Conventional K-Ar, 40Ar/39Ar total fusion, and 40Ar/39Ar incremental heating data on hawaiite and tholeiitic basalt samples from Ojin (Site 430), alkalic basalt samples from... -
Reflection microscopy and geochemistry at DSDP Leg 55 Holes
Magnetic properties of volcanic rocks are controlled mainly by the physical and chemical state of their constituent ferromagnetic minerals. The most important parameters... -
Mineral chemistry of basalts at DSDP Leg 55 Holes
Microprobe mineral compositions of olivine, plagioclase, clinopyroxene, chrome spinel, ilmenite, and titanomagnetite are presented for 7 samples from 4 flows of hawaiite and one... -
Petrography and chemical composition of the lava flows at DSDP Leg 55 Holes
During DSDP Leg 55, volcanic rocks were recovered at Sites 430, 432, and 433, on Ojin, Nintoku, and Suiko seamounts, respectively, in the Emperor Seamount chain. Of the five... -
Trace-element geochemistry of tholeiitic basalts from DSDP Hole 55-433C
Hole 433C, a multiple re-entry hole drilled in 1862 meters of water on Suiko Seamount in the central Emperor Seamounts, penetrated 387.5 meters of lava flows overlain by 163.0... -
Mineralogy and geochemistry of sedimentary deposits at DSDP Leg 55 Holes
The four holes (including a re-entry hole) drilled at Site 433 allow determination of the sedimentary sequence of Suiko Seamount in the Emperor chain. The holes are in a... -
Neogene diatoms at DSDP Leg 55 Holes
Leg 55 of the Deep Sea Drilling Project started from Honolulu, Hawaii, on 23 July 1977 and terminated at Yokohama, Japan on 6 September, 1977. Eleven holes were drilled at 4...