Mid-ocean-ridge rhyolite (MORR) eruptions on the East Pacific Rise lack the fizz to pop
نویسندگان
چکیده
منابع مشابه
Volcanic eruptions on mid-ocean ridges: New evidence from the superfast spreading East Pacific Rise, 17 –19 S
[1] Side-scan sonar, submersible observations and sampling of lava flows from the East Pacific Rise, 17 –19 S constrain the character and variability of submarine volcanic eruptions along mid-ocean ridges. Nine separate lava sequences were mapped using relative age and lithological contrasts among recovered samples. Axial lengths activated during eruptive episodes range from 1 to >18 km; indivi...
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[1] The major element, trace element, and isotopic composition of mid-ocean ridge basalt glasses affected by the Azores hotspot are strongly correlated with H2O content of the glass. Distinguishing the relative importance of source chemistry and potential temperature in ridge-hotspot interaction therefore requires a comprehensive model that accounts for the effect of H2O in the source on meltin...
متن کاملSeismicity at the southern East Pacific Rise from recordings of an ocean bottom seismometer array
[1] Seismic data recorded by ocean bottom seismometers (OBSs) at the southern East Pacific Rise (SEPR) were analyzed to characterize seismicity at fast spreading mid-ocean ridges. An automated event detection algorithm based on pattern recognition was developed to identify earthquake-generated T phases. The waveform cross-correlation and least squares method was found to provide more robust est...
متن کاملMid-ocean Ridge Tectonics, Volcanism and Geomorphology
Figure 11 Average depth of magma lens reflections beneath ridges versus spreading rate. The curved line shows the depth to the 12003C isotherm calculated from the ridge thermal model of Phipps Morgan J and Chen YJ (1993) Journal of Geophysical Research 98: 6283}6297. Data from different ridges are labeled Reykjanes Ridge (RR), Juan de Fuca Ridge (JdF), Costa Rica Rift (CRR), Lau Basin (Lau), no...
متن کاملConstraints on melt movement beneath the East Pacific Rise from 230Th-238U disequilibrium.
We report 230Th-238U disequilibrium data on mid-ocean ridge basalts recovered 5 to 40 kilometers off the ridge axis near 9 degrees 30'N of the East Pacific Rise. These data indicate near-symmetrical eruptions of normal mid-ocean ridge basalts (NMORBs) and incompatible element-enriched mid-ocean ridge basalts (EMORBs) as far as 20 kilometers off axis. Our results suggest large-scale subsurface l...
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ژورنال
عنوان ژورنال: Geology
سال: 2020
ISSN: 0091-7613,1943-2682
DOI: 10.1130/g47820.1