Blackman, D. K. et al. (2011): Drilling constraints on lithospheric accretion and evolution at Atlantis Massif, Mid-Atlantic Ridge 30 degrees N

Leg/Site/Hole: Related Expeditions:

IODP 304
IODP 305
IODP 304 U1309
IODP 305 U1309
IODP 340T U1309
IODP 304 U1310
IODP 304 U1311

Identifier: ID:

2012-023645

Type:

georefid

ID:

10.1029/2010JB007931

Type:

doi

Creator: Name:

Blackman, D. K.

Affiliation:

Scripps Institution of Oceanography, La Jolla, CA, United States

Role:

author

Name:

Ildefonse, B.

Affiliation:

Universite Montpellier II, France

Role:

author

Name:

John, B. E.

Affiliation:

University of Wyoming, United States

Role:

author

Name:

Ohara, Y.

Affiliation:

Ocean Research Laboratory, Japan

Role:

author

Name:

Miller, D. J.

Affiliation:

Texas A&M University, United States

Role:

author

Name:

Abe, N.

Affiliation:

Japan Agency for Marine-Earth Science and Technology, Japan

Role:

author

Name:

Abratis, M.

Affiliation:

Friedrich Schiller University of Jena, Germany

Role:

author

Name:

Andal, E. S.

Affiliation:

Philex Mining Corporation, Philippines

Role:

author

Name:

Andreani, M.

Affiliation:

Universite Claude Bernard Lyon I, France

Role:

author

Name:

Awaji, S.

Affiliation:

University of Tokyo, Japan

Role:

author

Name:

Beard, J. S.

Affiliation:

Virginia Museum of Natural History, United States

Role:

author

Name:

Brunelli, D.

Affiliation:

Universita Modena, Italy

Role:

author

Name:

Charney, A. B.

Affiliation:

Oregon State University, United States

Role:

author

Name:

Christie, D. M.

Affiliation:

University of Alaska Fairbanks, United States

Role:

author

Name:

Collins, J.

Affiliation:

Woods Hole Oceanographic Institution, United States

Role:

author

Name:

Delacour, A. G.

Affiliation:

Universite Toulouse, France

Role:

author

Name:

Delius, H.

Affiliation:

University of Leicester, United Kingdom

Role:

author

Name:

Drouin, M.

Affiliation:

Universite Reunion, France

Role:

author

Name:

Einaudi, F.

Affiliation:

Institut de Physique du Globe, France

Role:

author

Name:

Escartin, J.

Affiliation:

Eidgenoessische Technische Hochschule Zuerich, Switzerland

Role:

author

Name:

Frost, B. R.

Affiliation:

University of Hawaii at Manoa, United States

Role:

author

Name:

Frueh-Green, G.

Affiliation:

Mississippi State University, United States

Role:

author

Name:

Fryer, P. B.

Affiliation:

Australian National University, Australia

Role:

author

Name:

Gee, J. S.

Affiliation:

University of Bergen, Norway

Role:

author

Name:

Godard, M.

Affiliation:

Norwich University, United States

Role:

author

Name:

Grimes, C. B.

Affiliation:

Kanazawa University, Japan

Role:

author

Name:

Halfpenny, A.

Affiliation:

University of Texas at Austin, United States

Role:

author

Name:

Hansen, H. E.

Affiliation:

Brown University, United States

Role:

author

Name:

Harris, A. C.

Affiliation:

Exxon-Mobile, United States

Role:

author

Name:

Tamura, A.

Affiliation:

Baker Hughes, United States

Role:

author

Name:

Hayman, N. W.

Affiliation:

Cardiff University, United Kingdom

Role:

author

Name:

Hellebrand, E.

Affiliation:

Hokkaido University, Japan

Role:

author

Name:

Hirose, T.

Affiliation:

Lawrence Berkeley National Laboratory, United States

Role:

author

Name:

Hirth, J. G.

Affiliation:

University of Leeds, United Kingdom

Role:

author

Name:

Ishimaru, S.

Affiliation:

Shizuoka University, Japan

Role:

author

Name:

Johnson, K. T. M.

Affiliation:

University of Plymouth, United Kingdom

Role:

author

Name:

Karner, G. D.

Affiliation:

Nihon University, Japan

Role:

author

Name:

Linek, M.

Affiliation:

Okayama University, Japan

Role:

author

Name:

MacLeod, C. J.

Affiliation:

GeoForschungsZentrum, Germany

Role:

author

Name:

Maeda, J.

Affiliation:

Durham University, United Kingdom

Role:

author

Name:

Mason, O. U.

Affiliation:

Universitat zu Koeln, Germany

Role:

author

Name:

McCaig, A. M.

Affiliation:

University of Freiburg, Germany

Role:

author

Name:

Michibayashi, K.

Affiliation:

University of California at Santa Cruz, United States

Role:

author

Name:

Morris, A.

Affiliation:

Role:

author

Name:

Nakagawa, T.

Affiliation:

Role:

author

Name:

Nozaka, T.

Affiliation:

Role:

author

Name:

Rosner, M.

Affiliation:

Role:

author

Name:

Searle, R. C.

Affiliation:

Role:

author

Name:

Suhr, G.

Affiliation:

Role:

author

Name:

Tominaga, M.

Affiliation:

Role:

author

Name:

von der Handt, A.

Affiliation:

Role:

author

Name:

Yamasaki, T.

Affiliation:

Role:

author

Name:

Zhao, X.

Affiliation:

Role:

author

Identification: Title:

Drilling constraints on lithospheric accretion and evolution at Atlantis Massif, Mid-Atlantic Ridge 30 degrees N

Year:

2011

Source:

Journal of Geophysical Research

Publisher:

American Geophysical Union, Washington, DC, United States

Volume:

116

Issue:

Pages:

Abstract:

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.

Language:

English

Genre:

Serial

Rights:

URL:

Coverage:Geographic coordinates:

	North:30.1200
West:-42.0700		East: -42.0400
	South:30.1000

Keywords:

Solid-earth geophysics; Applied geophysics; accretion; Atlantic Ocean; Atlantis Massif; cores; crust; Expedition 304; Expedition 305; Expeditions 304/305; gabbros; geophysical methods; geophysical surveys; igneous rocks; Integrated Ocean Drilling Program; IODP Site U1309; IODP Site U1310; IODP Site U1311; lithosphere; magmatism; Mid-Atlantic Ridge; mid-ocean ridges; North Atlantic; ocean floors; oceanic crust; oceanic lithosphere; plutonic rocks; refraction methods; seismic methods; surveys; tectonics;

SEDIS - Publications

Blackman, D. K. et al. (2011): Drilling constraints on lithospheric accretion and evolution at Atlantis Massif, Mid-Atlantic Ridge 30 degrees N