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East Pacific Rise Crest: A Near-Bottom Geophysical Profile
Science, 1969A deep-towed magnetometer profile made across the East Pacific Rise crest shows many anomalies with about 1000-gamma amplitudes and 500-meter wavelengths and has larger amplitude changes corresponding to magnetic field reversals. This profile across contacts between normal and reversely magnetized crustal blocks is interpreted to place an upper limit ...
R L, Larson, F N, Spiess
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Hydrothermal plume-particle fluxes at 13°N on the East Pacific Rise
Deep Sea Research Part I: Oceanographic Research Papers, 2002We have investigated the geochemical flux to sediment traps deployed close to the Totem vent site, 13°N EPR. An important emphasis has been to investigate what proportion of this settling flux derives from direct co-precipitation of vent-fluid material as polymetallic sulphides and what proportion is in the form of Fe oxyhydroxide material which not ...
German, C.R. +4 more
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The rise or fall of neglected tropical diseases in East Asia Pacific
Acta Tropica, 2020While the East Asia Pacific (EAP) region has experienced tremendous economic growth and development, the resulting public health gains from reductions in its neglected tropical diseases (NTDs) have been less than expected due to opposing forces of urbanization, political instability, food insecurity, and climate change, together with co-morbidities ...
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Small off-axis volcanoes on the East Pacific Rise
Earth and Planetary Science Letters, 1996Abstract A study of Sea Beam bathymetry and SeaMARC II side-scan sonar data allows a quantitative measure of the contribution of off-axis volcanism to the creation of abyssal hill topography on the East Pacific Rise (EPR) 9°15′N–9°50′N. In order to assess the role of off-axis volcanism, the distribution of volcanic edifices within 35 km of the ridge ...
Russ T. Alexander, Ken C. Macdonald
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Abyssal hills, magnetic anomalies and the east pacific rise
Earth and Planetary Science Letters, 1967Abstract Long ridges and troughs are characteristic of the East Pacific rise off North and Central America. The trends of the topography are parallel to the trends of magnetic anomalies but are not specifically related. Locally the topography, like the magnetic anomalies, shows a gross symmetry and the sea floor spreading hypothesis could account for
H.W. Menard, Jacqueline Mammerickx
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A226Ra section across the East Pacific Rise
Earth and Planetary Science Letters, 1980Abstract Four vertical Ra profiles have been measured across the East Pacific Rise (EPR) from Callao to Tahiti. These profiles show that Ra in the deep water (below 2 km depth) increases toward the EPR. However, this increase does not necessarily indicate a Ra source on the EPR.
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Fracture zones and offsets of the East Pacific Rise
Journal of Geophysical Research, 1966The East Pacific rise follows a gentle sinuous curve through the eastern Pacific basin on even the most recent published maps [Menard, 1964]. However, new soundings from Scripps Institution expeditions Amphitrite, CrissCross, RisePac, Step I, and Zephyrus, plus outside sources, permit extensive recontouring which shows quite a different pattern ...
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Fissure Basalts and Ocean-Floor Spreading on the East Pacific Rise
Science, 1968A basalt pavement outcrops almost continuously in a band along the crestal region of the East Pacific Rise from about 14°S to 6°S, that is, for more than 800 ikilometers; the outcrop may well extend beyond the above limits along the axis of the rise. The basalt band is generally between 40 and 60 kilometers wide and is replaced laterally by sediment ...
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The intersection of the Siqueiros Transform Fault and the East Pacific Rise
Marine Geology, 1976Abstract A near-bottom geological and geophysical survey was conducted at the western intersection of the Siqueiros Transform Fault and the East Pacific Rise. Transform-fault shear appears to distort the east flank of the rise crest in an area north of the fracture zone.
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Origin of metalliferous sediments from the East Pacific Rise
Earth and Planetary Science Letters, 1973Abstract The distribution of several metals in East Pacific Rise sediments, when normalized to Al2O3, exhibit stronger maxima near the rise crest than when simply plotted on a carbonate-free basis. The similarity (1) between the distribution of metals in ridge sediments and previously measured mean heat flow values and (2) between the composition of ...
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