 | Renard, V., Hekinian, R., Francheteau, J., Ballard, R.D., Backer, H. (1985) Submersible observations at the axis of the ultra-fast-spreading East Pacific Rise (17°30′ to 21°30′S) Earth and Planetary Science Letters, 75 (4) 339-353 doi:10.1016/0012-821x(85)90178-5 | Journal (article/letter/editorial) | | ultra-fast-spreading East Pacific Rise (17"30' to 21°30'S) V. R e n a r d 1, R. Hekinian 1, j. F r a n c h e t e... 75230 Paris Cedex 05 (France) ¢ Department of Ocean Engineering, Woods Hole Oceanographic Institution...diving saucer "Cyana" at the axis of the East Pacific Rise at four sites near 21030', 21010', 18030'...fastest accretion found in the ocean. 1. Introduction Since 1977, using m a n n e d submersible, a longterm...volcanic, tectonic a n d h y d r o t h e r m a l processes has been u n d e r t a k e n at the axis of the |  | | Journal (article/letter/editorial) | | S0016-7037(99)00169-6 Volatiles (He, C, N, Ar) in mid-ocean ridge basalts: Assesment of shallow-level...mid-ocean ridge basalts (MORB) glasses from the Mid-Atlantic Ridge between 24°N and 36°N, the East Pacific...Pacific Rise at 21°N, 13°N, and 17–19°S, the Red Sea (18 –20°N), the Indian Ocean near the Triple Junction...and analysis. Static mass spectrometry was used for N, He, and Ar, and conventional dynamic mass spectrometry...(3He/4He ⫽ 8.53 ⫾ 0.79 Ra; n ⫽ 36) and C isotope ratios (␦13C ⫽ ⫺5.2 ⫾ 0.7‰ vs. PDB; n ⫽ 21), and of a light |  | Hekinian, Robert, Hoffert, Michel, Larque, Philippe, Cheminee, Jean-Louis, Stoffers, Peter, Bideau, Daniel (1993) Hydrothermal Fe and Si oxyhydroxide deposits from South Pacific intraplate volcanoes and East Pacific Rise axial and off-axial regions. Economic Geology, 88 (8) 2099-2121 doi:10.2113/gsecongeo.88.8.2099 | Journal (article/letter/editorial) | | boundariesof the EastPacificnear 21ø N, 12050' N, and 11ø30• N. Basedon field observations and compositional...Zn + Ni > 0.4-1%), •vith an iron contentof 30 to 50 percent;(3) Fe-Si oxyhydroxides also formingchimneys...EastPacificRiseregions.Both the intraplateand the EPR depositsare associated with pillo•v lava, sheetflows...Si-enrichedoxyhydroxide precipitatesare commonconstituentsof ocean-floor deposits in a greatvarietyof geologicsettings...3o •_ •w Fe & Si OXYHYDROXIDE DEPOSITS,S. PACIFIC & EPR REGION 2101 marinehydrothermalactivity(Bonattiand |  | | Book | | p...,u Mn", In'""",,'_ "'I...0( ,10<' hnh', <N.......... ,......'llrm". """ 0/ ...... ) ,0( .... ." ... ,",,,,.n" "...., ol.nl'ni...nl'ni ",. \ ~, CA>kh<1unodI: __ hI' .,"'" ....... " n, Iht thn <><'" '"I>o""",,~ 'I"<",~y V I " ...'" ol<"~",""",'" _ ..."........ ~. _ ,"" """"'."'n ...) '" "'" " _ . , ,~ "" ~''''''> ,,; ..... plan« 'n.. "l1li) ,0/ Un~ ho, '''~' |  | | Journal (article/letter/editorial) | | melt inclusions and the origin of garnet signatures N. Shimizu Department of Geology and Geophysics, Woods...Prinzhofer et al. (1989) observed, that MORB glasses (EPR, 12~50'N) with light rare earth element (LREE) enrichment...of~40 • 60 lain, replicate analyses o f a basanite glass standard from Loihi (Garcia et al., 1995) has produced...et al., 1993). . References Frey, F.A., Walker, N., Stakes, D., tlart, S.R. and Nielsen, R. (1993) Earth...(1989) Earth Planet. Sci. Left., 92, 189-206. Shimizu. N. (1998) Phys. Earth Planet. hit., in press. 1393 |  | | Book | | EVOLUTION REFERENCES 1 2 3 4 4 5 7 7 7 7 8 8 8 8 9 9 9 12 14 Within galaxies, stars and supernovae play the...core devoid of further nuclear energy then gives rise to a type II supernova and the formation of a neutron...companion onto a compact object. This naturally gives rise to a variety of interesting phenomena: classical...p-process, a combination of the g-process and the n-process, which we understand to be responsible for...products of CNO cycle burning (e.g., 13C, 17O, and 14 N) to the surface. A second dredge-up phase occurs following |  | | Book | | recent volcanic rocks in the Marianas arc, western Pacific (Woodhead and Fraser 1985), and from studies of...accretionary wedge development or lack thereof at circum-Pacific convergent plate boundaries (Hilde 1983). Further...exhibited by spreading ridge systems within the ocean basins relates to spreading rates. Slow spreading...research attention, especially along the East Pacific Rise and along the Galapagos and Juan de Fuca spreading...Cross-sections of a slow-spreading and b fast-spreading ocean ridge systems. Note the more pronounced fault-induced |
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