scholarly journals Lower crustal variability and the crust/mantle transition at the Atlantis Massif oceanic core complex

2010 ◽  
Vol 37 (24) ◽  
pp. n/a-n/a ◽  
Author(s):  
Donna K. Blackman ◽  
John A. Collins
Keyword(s):  
Core Complex ◽  
Oceanic Core Complex ◽  
Atlantis Massif ◽  
Lower Crustal

scholarly journals IODP Expeditions 304 and 305: Oceanic Core Complex Formation, Atlantis Massif

2005 ◽  
Vol 1 ◽  
pp. 28-31 ◽  
Author(s):  
B. Ildefonse ◽  
Keyword(s):  
Complex Formation ◽  
Core Complex ◽  
Oceanic Core Complex ◽  
Atlantis Massif

No abstract available. <br><br> doi:<a href="http://dx.doi.org/10.22 04/iodp.sd.1.05.2005" target="_blank">10.22 04/iodp.sd.1.05.2005</a>

Geology of the Atlantis Massif (Mid-Atlantic Ridge, 30° N): Implications for the evolution of an ultramafic oceanic core complex

2002 ◽  
Vol 23 (5/6) ◽  
pp. 443-469 ◽  
Author(s):  
Donna K. Blackman ◽  
Jeffrey A. Karson ◽  
Deborah S. Kelley ◽  
Johnson R. Cann ◽  
Gretchen L. Früh-Green ◽  
...  
Keyword(s):  
Core Complex ◽  
Oceanic Core Complex ◽  
Atlantis Massif ◽  
Mid Atlantic Ridge

scholarly journals The cooling history and the depth of detachment faulting at the Atlantis Massif oceanic core complex

2012 ◽  
Vol 13 (10) ◽  
pp. n/a-n/a ◽  
Author(s):  
Nicole Schoolmeesters ◽  
Michael J. Cheadle ◽  
Barbara E. John ◽  
Peter W. Reiners ◽  
Jeffrey Gee ◽  
...  
Keyword(s):  
Core Complex ◽  
Cooling History ◽  
Oceanic Core Complex ◽  
Atlantis Massif ◽  
Detachment Faulting

scholarly journals IODP Expedition 340T: Borehole Logging at Atlantis Massif Oceanic Core Complex

2013 ◽  
Vol 15 ◽  
pp. 31-35 ◽  
Author(s):  
D. Blackman ◽  
A. Slagle ◽  
A. Harding ◽  
G. Guerin ◽  
A. McCaig
Keyword(s):  
Structural Characteristics ◽  
Seismic Profile ◽  
Core Complex ◽  
Oceanic Core Complex ◽  
Ocean Drilling Program ◽  
Borehole Logging ◽  
Integrated Ocean Drilling Program ◽  
Atlantis Massif ◽  
Zero Offset ◽  
Downhole Temperature

Integrated Ocean Drilling Program (IODP) Expedition 340T returned to the 1.4-km-deep Hole U1309D at Atlantis Massif to carry out borehole logging including vertical seismic profiling (VSP). Seismic, resistivity, and temperature logs were obtained throughout the geologic section in the footwall of this oceanic core complex. Reliable downhole temperature measurements throughout and the first seismic coverage of the 800–1400 meters below seafloor (mbsf) portion of the section were obtained. Distinct changes in velocity, resistivity, and magnetic susceptibility characterize the boundaries of altered, olivine-rich troctolite intervals within the otherwise dominantly gabbroic se-quence. Some narrow fault zones also are associated with downhole resistivity or velocity excursions. Small deviations in temperature were measured in borehole fluid adjacent to known faults at 750 mbsf and 1100 mbsf. This suggests that flow of seawater remains active along these zones of faulting and rock alteration. Vertical seismic profile station coverage at zero offset now extends the full length of the hole, including the uppermost 150 mbsf, where detachment processes are expected to have left their strongest imprint. Analysis of wallrock properties, together with alteration and structural characteristics of the cores from Site U1309, highlights the likely interplay between lithology, structure, lithospheric hydration, and core complex evolution. <br><br> doi:<a href="http://dx.doi.org/10.2204/iodp.sd.15.04.2013" target="_blank">10.2204/iodp.sd.15.04.2013</a>

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