georefid:2012-023645SEDIS Publication Catalogue

ana.macario@awi.de

http://sedis.iodp.org/pub-catalogue/informationpointOfContact2013-07-08T00:00:00Zhttp://sedis.iodp.org/pub-catalogue/index.php?id=10.1029/2010JB0079312011-01-01publicationgeorefid:2012-023645doi:10.1029/2010JB007931Blackman, D. K.Scripps Institution of Oceanography, La Jolla, CA, United StatesauthorIldefonse, B.Universite Montpellier II, FranceauthorJohn, B. E.University of Wyoming, United StatesauthorOhara, Y.Ocean Research Laboratory, JapanauthorMiller, D. J.Texas A&M University, United StatesauthorAbe, N.Japan Agency for Marine-Earth Science and Technology, JapanauthorAbratis, M.Friedrich Schiller University of Jena, GermanyauthorAndal, E. S.Philex Mining Corporation, PhilippinesauthorAndreani, M.Universite Claude Bernard Lyon I, FranceauthorAwaji, S.University of Tokyo, JapanauthorBeard, J. S.Virginia Museum of Natural History, United StatesauthorBrunelli, D.Universita Modena, ItalyauthorCharney, A. B.Oregon State University, United StatesauthorChristie, D. M.University of Alaska Fairbanks, United StatesauthorCollins, J.Woods Hole Oceanographic Institution, United StatesauthorDelacour, A. G.Universite Toulouse, FranceauthorDelius, H.University of Leicester, United KingdomauthorDrouin, M.Universite Reunion, FranceauthorEinaudi, F.Institut de Physique du Globe, FranceauthorEscartin, J.Eidgenoessische Technische Hochschule Zuerich, SwitzerlandauthorFrost, B. R.University of Hawaii at Manoa, United StatesauthorFrueh-Green, G.Mississippi State University, United StatesauthorFryer, P. B.Australian National University, AustraliaauthorGee, J. S.University of Bergen, NorwayauthorGodard, M.Norwich University, United StatesauthorGrimes, C. B.Kanazawa University, JapanauthorHalfpenny, A.University of Texas at Austin, United StatesauthorHansen, H. E.Brown University, United StatesauthorHarris, A. C.Exxon-Mobile, United StatesauthorTamura, A.Baker Hughes, United StatesauthorHayman, N. W.Cardiff University, United KingdomauthorHellebrand, E.Hokkaido University, JapanauthorHirose, T.Lawrence Berkeley National Laboratory, United StatesauthorHirth, J. G.University of Leeds, United KingdomauthorIshimaru, S.Shizuoka University, JapanauthorJohnson, K. T. M.University of Plymouth, United KingdomauthorKarner, G. D.Nihon University, JapanauthorLinek, M.Okayama University, JapanauthorMacLeod, C. J.GeoForschungsZentrum, GermanyauthorMaeda, J.Durham University, United KingdomauthorMason, O. U.Universitat zu Koeln, GermanyauthorMcCaig, A. M.University of Freiburg, GermanyauthorMichibayashi, K.University of California at Santa Cruz, United StatesauthorMorris, A.authorNakagawa, T.authorNozaka, T.authorRosner, M.authorSearle, R. C.authorSuhr, G.authorTominaga, M.authorvon der Handt, A.authorYamasaki, T.authorZhao, X.authorAmerican Geophysical Union, Washington, DC, United StatespublisherdocumentHardcopyJournal of Geophysical Research116 (B7)Expeditions 304 and 305 of the Integrated Ocean Drilling Program cored and logged a 1.4 km section of the domal core of Atlantis Massif. Postdrilling research results summarized here constrain the structure and lithology of the Central Dome of this oceanic core complex. The dominantly gabbroic sequence recovered contrasts with predrilling predictions; application of the ground truth in subsequent geophysical processing has produced self-consistent models for the Central Dome. The presence of many thin interfingered petrologic units indicates that the intrusions forming the domal core were emplaced over a minimum of 100-220 kyr, and not as a single magma pulse. Isotopic and mineralogical alteration is intense in the upper 100 m but decreases in intensity with depth. Below 800 m, alteration is restricted to narrow zones surrounding faults, veins, igneous contacts, and to an interval of locally intense serpentinization in olivine-rich troctolite. Hydration of the lithosphere occurred over the complete range of temperature conditions from granulite to zeolite facies, but was predominantly in the amphibolite and greenschist range. Deformation of the sequence was remarkably localized, despite paleomagnetic indications that the dome has undergone at least 45 degrees rotation, presumably during unroofing via detachment faulting. Both the deformation pattern and the lithology contrast with what is known from seafloor studies on the adjacent Southern Ridge of the massif. There, the detachment capping the domal core deformed a 100 m thick zone and serpentinized peridotite comprises approximately 70% of recovered samples. We develop a working model of the evolution of Atlantis Massif over the past 2 Myr, outlining several stages that could explain the observed similarities and differences between the Central Dome and the Southern Ridge.completedSolid-earth geophysicsApplied geophysicsaccretionAtlantic OceanAtlantis MassifcorescrustExpedition 304Expedition 305Expeditions 304/305gabbrosgeophysical methodsgeophysical surveysigneous rocksIntegrated Ocean Drilling ProgramIODP Site U1309IODP Site U1310IODP Site U1311lithospheremagmatismMid-Atlantic Ridgemid-ocean ridgesNorth Atlanticocean floorsoceanic crustoceanic lithosphereplutonic rocksrefraction methodsseismic methodssurveystectonicsurn:org.iodp:exp:304urnlargerWorkCitationcampaignurn:org.iodp:exp:305urnlargerWorkCitationcampaignurn:org.iodp:exp:304:site:U1309urnlargerWorkCitationstudyurn:org.iodp:exp:304urnlargerWorkCitationcampaignurn:org.iodp:exp:305:site:U1309urnlargerWorkCitationstudyurn:org.iodp:exp:305urnlargerWorkCitationcampaignurn:org.iodp:exp:340T:site:U1309urnlargerWorkCitationstudyurn:org.iodp:exp:340TurnlargerWorkCitationcampaignurn:org.iodp:exp:304:site:U1310urnlargerWorkCitationstudyurn:org.iodp:exp:304urnlargerWorkCitationcampaignurn:org.iodp:exp:304:site:U1311urnlargerWorkCitationstudyurn:org.iodp:exp:304urnlargerWorkCitationcampaignEnglishgeoscientificInformation-42.0700-42.040030.100030.1200