Zobrazeno 1 - 10
of 31
pro vyhledávání: '"S. Fretzdorff"'
Publikováno v:
Contributions to Mineralogy and Petrology. 163:1103-1119
Lavas from the South Shetland Islands volcanic arc (northern Antarctic Peninsula) have been investigated in order to determine the age, petrogenesis and compositional evolution of a long-lived volcanic arc constructed on 32-km-thick crust, a thicknes
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::ee885bb10947c035007b4f75596f821e
https://doi.org/10.1007/s00410-012-0719-7
https://doi.org/10.1007/s00410-012-0719-7
Autor:
Karsten M. Haase, R. A. Livermore, Philip T. Leat, S. Fretzdorff, Christoph Beier, Tiffany L. Barry, Folkmar Hauff, Julian A. Pearce
Publikováno v:
Chemical Geology. 280:115-125
New 40Ar-39Ar ages of 5.6 to 1.3 Ma for lavas from the fossil Phoenix Ridge in the Drake Passage show that magmatism continued for at least 2 Ma after the cessation of spreading at 3.3 ± 0.2 Ma. The Phoenix Ridge lavas are incompatible element-enric
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::25cefab8515a0141d2483772a9adede4
https://doi.org/10.1016/j.chemgeo.2010.11.002
https://doi.org/10.1016/j.chemgeo.2010.11.002
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
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::b618601996e6e42d9f44573c83163218
https://doi.org/10.1016/j.lithos.2009.05.041
https://doi.org/10.1016/j.lithos.2009.05.041
Publikováno v:
Geological Society, London, Special Publications. 219:333-344
The East Scotia Ridge, situated in the South Atlantic, is the back-arc spreading centre to the intra-oceanic South Sandwich arc. Samples from the ridge show a wide diversity in erupted magma compositions. Segment E2, in the northern part of the ridge
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::3fb93379bca96dc7dff5340f94a55c21
https://doi.org/10.1144/gsl.sp.2003.219.01.16
https://doi.org/10.1144/gsl.sp.2003.219.01.16
Autor:
S. Fretzdorff, John L. Smellie
Publikováno v:
Antarctic Science. 14:412-421
Bransfield Strait, a narrow active rift with three submarine basins, separates the South Shetland Islands from northern Antarctic Peninsula. Volcanism in Bransfield Strait commenced prior to 0.75 Ma and continues, with recent subaerial eruptions at D
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::b3c7a6bb2a22679c3173a570d8b4c3cf
https://doi.org/10.1017/s0954102002000214
https://doi.org/10.1017/s0954102002000214
Publikováno v:
Journal of Petrology. 43:1435-1467
The East Scotia Ridge is an active back-arc spreading centre located to the west of the South Sandwich island arc in the South Atlantic Ocean, consisting of nine main segments, E1 (north) to E9 (south). Major and trace element and Sr–Nd–Pb isotop
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::ec9c2f82b54a60a5876df044514fa4a2
https://doi.org/10.1093/petrology/43.8.1435
https://doi.org/10.1093/petrology/43.8.1435
Autor:
Karsten M. Haase, S. Fretzdorff
Publikováno v:
Mineralogy and Petrology. 75:153-184
Major and trace element data as well as Sr and Nd isotope compositions for submarine lavas from the flanks of Reunion island are reported. The submarine basalts of the island have major and trace element compositions similar to those of the subaerial
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::1fa4568c5b8f05107bc5349ce4a0dbd3
https://doi.org/10.1007/s007100200022
https://doi.org/10.1007/s007100200022
Autor:
Karsten M. Haase, J.-G. Schilling, L. J. Elkins, Susan E. Humphris, Janne Blichert-Toft, Kenneth W.W. Sims, M.K. Reagan, Tim Elliott, S. Fretzdorff, Jerzy S. Blusztajn, Julie Prytulak
Publikováno v:
Geochimica et Cosmochimica Acta
Geochimica et Cosmochimica Acta, Elsevier, 2014, 127, pp.140-170. ⟨10.1016/j.gca.2013.11.031⟩
Geochimica et Cosmochimica Acta, 2014, 127, pp.140-170. ⟨10.1016/j.gca.2013.11.031⟩
Geochimica et Cosmochimica Acta, Elsevier, 2014, 127, pp.140-170. ⟨10.1016/j.gca.2013.11.031⟩
Geochimica et Cosmochimica Acta, 2014, 127, pp.140-170. ⟨10.1016/j.gca.2013.11.031⟩
We present new 238 U– 230 Th– 226 Ra– 210 Pb, 235 U– 231 Pa, and Nd, Sr, Hf, and Pb isotope data for the slow- to ultraslow-spreading Mohns, Knipovich, and Gakkel Ridges. Combined with previous work, our data from the Arctic Ridges cover the
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::1af4c5b00a2f43cc54b139b010afe764
https://hal.archives-ouvertes.fr/hal-02110401
https://hal.archives-ouvertes.fr/hal-02110401
Publikováno v:
Marine Geology. 148:39-53
The form of the Deccan-Maldives-Mascarene-Reunion hotspot trace suggests that it has, at least in part, been strongly controlled by crustal structures, especially fracture zones. This makes it difficult to assess the present-day or past location of t
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::85702d9c05008739abe94b9f54305c94
https://doi.org/10.1016/s0025-3227(98)00022-x
https://doi.org/10.1016/s0025-3227(98)00022-x
Publikováno v:
Lithos. 38:23-40
The newly discovered Umu Volcanic Field lies some 170 km west of Easter Island and covers an area of 1700 km2. The field consists of two elongated ridges with three distinct peaks; photographic observations and dredge sampling indicate young volcanic
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::44a52210cdb98bbde0568ba98d6742ab
https://doi.org/10.1016/0024-4937(96)00008-4
https://doi.org/10.1016/0024-4937(96)00008-4