Zobrazeno 1 - 10
of 45
pro vyhledávání: '"Richard Mühe"'
Publikováno v:
Lithos. 112:137-148
New geochemical data are presented for fresh lavas from off-axis seamounts east and west of the Valu Fa Ridge and from seamounts south of the propagating rift tip of the Valu Fa Ridge. Most seamount lavas are basaltic and thus more primitive than the
Publikováno v:
Journal of Volcanology and Geothermal Research. 176:571-582
A submersible dive conducted on Volcano #1 located near 21 degrees 09'S-175 degrees 45'W on the Tonga Arc showed that the volcanic edifice with a caldera floor area of 30 km(2) located at and 450 m deep (b.s.l.=below sea level) was constructed recent
Autor:
Peter J. Michael, Richard Mühe, Charles H. Langmuir, Edward T. Baker, David W. Graham, Christopher R. German, H. N. Edmonds, Henry J. B. Dick, Douglas P. Connelly, Jonathan E. Snow
Publikováno v:
Nature. 421:252-256
Submarine hydrothermal venting along mid-ocean ridges is an important contributor to ridge thermal structure, and the global distribution of such vents has implications for heat and mass fluxes from the Earth's crust and mantle and for the biogeograp
Publikováno v:
Chemical Geology. 182:227-235
The ultraslow spreading Gakkel Ridge represents one of the most extreme spreading environments on the Earth. Full spreading rates there of 0.6–1.3 cm/year and Na8.0 in basalts of 3.3 imply an extremely low degree of mantle partial melting. For this
Autor:
Jörn Thiede, Robert F Spielhagen, Jonathan E. Snow, Christian Haas, Richard Mühe, Wilfried Jokat
Publikováno v:
German Research. 24:4-9
The AMORE Expedition headed for the so-called “Gakkel Ridge” where, on the floor of the Arctic Ocean, there is hot work afoot — for this ocean ridge is composed of active volcanoes
Autor:
Robert F Spielhagen, Richard Mühe, Jonathan E. Snow, Christian Haas, Jörn Thiede, Wilfried Jokat
Publikováno v:
Forschung. 26:14-19
Der so genannte Gakkel-Rucken war das Ziel der AMORE-Arktisexpedition. Dort, auf dem Boden des Nordpolarmeeres, ging es einst heis her: das Tiefsee-Gebirge besteht aus erkalteten Vulkanen
Publikováno v:
Chemical Geology. 166:225-239
Geochemical and isotopic data of tholeiitic lavas from the northernmost volcanic deep, the Shaban Deep in the Red Sea rift suggest the presence of small-scale heterogeneities in the mantle underneath this part of the rift. The major and rare-earth el
Publikováno v:
Earth and Planetary Science Letters. 151:205-223
Phenocryst assemblages, and mineral and melt inclusion compositions of magmas erupted at near-axis seamounts on either side of Valu Fa Ridge provide a hitherto unprecedented insight into the complexity of magma generation in this back-are basin tecto
Publikováno v:
Chemical Geology. 137:67-77
Major- and trace-element as well as Pb-isotope data are presented for greenschist- to amphibolite-facies greenstones from two locations: (1) metabasalt-breccias from the Galapagos Rift at 100°W; and (2) metabasalt-breccias and unbrecciated greenston
Publikováno v:
Earth and Planetary Science Letters. 120:103-109
The geochemistry of mid-oceanic ridge basalts from 86°N (Arctic Ocean) provides, for the first time, an insight into the composition of the mantle around the North Pole. Our data show the source region of the Arctic basalts to possess traces of an e