Plutonic foundation of a slow‐spreading ridge segment: Oceanic core complex at Kane Megamullion, 23°30′N, 45°20′W
- H. Dick, M. Tivey, B. Tucholke
- Geology
- 1 May 2008
We mapped the Kane megamullion, an oceanic core complex on the west flank of the Mid‐Atlantic Ridge exposing the plutonic foundation of a ∼50 km long, second‐order ridge segment. The complex was…
A near‐bottom magnetic survey of the Mid‐Atlantic Ridge axis at 26°N: Implications for the tectonic evolution of the TAG segment
- M. Tivey, H. Schouten, M. C. Kleinrock
- Geology
- 1 May 2003
[1] An extensive deep-tow magnetic survey of the TAG ridge segment on the Mid-Atlantic Ridge reveals new information about the relationship between the magnetic anomaly field and the TAG hydrothermal…
An integrated, underwater optical /acoustic communications system
- N. Farr, A. Bowen, J. Ware, C. Pontbriand, M. Tivey
- PhysicsOCEANS'10 IEEE SYDNEY
- 24 May 2010
Communication underwater is severely limited when compared to communications in air because water is essentially opaque to electromagnetic radiation except in the visible band. Even in the visible…
Crustal magnetization and accretion at the Southwest Indian Ridge near the Atlantis II fracture zone, 0–25 Ma
- A. Hosford, M. Tivey, Takeshi Matsumoto, H. Dick, H. Schouten, H. Kinoshita
- Geology
- 1 March 2003
[1] We analyze geophysical data that extend from 0 to 25-Myr-old seafloor on both flanks of the Southwest Indian Ridge (SWIR). Lineated marine magnetic anomalies are consistent and identifiable…
Geomagnetic polarity reversal model of deep-tow profiles from the Pacific Jurassic Quiet Zone
- W. Sager, C. Weiss, M. Tivey, H. Johnson
- Geology
- 10 March 1998
The Jurassic magnetic "Quiet Zone" (JQZ) contains magnetic lineations, but their low amplitudes make correlation and interpretation difficult. Part of the problem is the separation of source and…
Central anomaly magnetization high: constraints on the volcanic construction and architecture of seismic layer 2A at a fast-spreading mid-ocean ridge, the EPR at 9°30′–50′N
- H. Schouten, M. Tivey, D. Fornari, J. R. Cochran
- Geology
- 30 May 1999
Magnetic polarity structure of the lower oceanic crust
- S. Allerton, M. Tivey
- Geology
- 1 February 2001
A newly developed rock drill was used to take the first fully oriented samples from in‐situ gabbros exposed on Atlantis Bank, which formed 11 m.y. ago on the Southwest Indian Ridge (SWIR). These…
Deep-sea mining of seafloor massive sulfides
- P. Hoagland, S. Beaulieu, Jian Lin
- Geology
- 1 May 2010
Crustal magnetization reveals subsurface structure of Juan de Fuca Ridge hydrothermal vent fields
- M. Tivey, H. Johnson
- Geology
- 1 November 2002
A near-bottom geophysical survey on the Endeavour segment of the northern Juan de Fuca Ridge shows that regions of well-defined low crustal magnetization are strongly correlated with both active and…
Direct measurement of magnetic reversal polarity boundaries in a cross‐section of oceanic crust
- M. Tivey, H. Johnson, B. Wooding
- Geology
- 1 October 1998
Magnetic field measurements made by submersible define the cross‐sectional geometry of a magnetic polarity reversal boundary and the vertical variation of crustal magnetization in upper oceanic…
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