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Description and geochemistry of DSDP Leg 55 Holes
One of the objectives of Leg 55 was to investigate the Tertiary history of sedimentation and environment on the Emperor Seamounts after their volcanic activity. For the three... -
Geochemistry at DSDP Leg 55 Holes
The tops of the Emperor chain guyots, which were drilled during Leg 55, lie above the carbonate compensation depth (CCD), as well as above the foraminiferal dissolution level,... -
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... -
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... -
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... -
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... -
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... -
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... -
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... -
Annotated record of the detailed examination of Mn deposits from DSDP Leg 55 ...
Leg 55 was conceived as part of the decade-long experiment to test the kinematic hot-spot hypothesis and several of its more imporant corollaries for the origin of the... -
Interstitial water chemistry of Hole 55-432, raw data
Values are taken directly from the chemistry technicians shipboard notebook. -
Interstitial water chemistry of Hole 55-431, raw data
Values are taken directly from the chemistry technicians shipboard notebook. -
Interstitial water chemistry of Hole 55-433A, raw data
Values are taken directly from the chemistry technicians shipboard notebook. -
Interstitial water chemistry of Hole 55-430, raw data
Values are taken directly from the chemistry technicians shipboard notebook. -
(Table 1) Petrography at DSDP Leg 55 Holes
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