Detachment shear zone of the Atlantis Massif core complex, Mid-Atlantic Ridge, 30°N
نویسندگان
چکیده
منابع مشابه
Protracted Construction of Gabbroic Crust At a Slow Spreading Ridge: Constraints from (206)Pb/(238)U Zircon Ages from Atlantis Massif and Iodp Hole U1309D (30 Degrees N, Mar)
T41D-1336.Karson, J. A. (1990), Seafloor spreading on the Mid-AtlanticRidge: Implications for the structure of ophiolites and ocea-nic lithosphere produced in slow-spreading environments, in Ophiolites and Oceanic Crustal Analogues: Proceedings of the Symposium ‘‘Troodos 1987’’, edited by J. Malpas et al.,pp. 125–130, Geol. Surv. Dep., Nicosia, Cyprus.Karson, J. A., G. L. Fr...
متن کاملIodp Expedition 305: Ocean Core Complex Formation, Atlantis Massif Site U1309 Summary
SCIENCE SUMMARY Site U1309 (Prospectus Site AMFW-01A) is located on the central dome of Atlantis Massif, 15 km west of the median valley axis of the Mid-Atlantic Ridge, where the seafloor coincides with a corrugated detachment fault surface. Site U1309 comprises eight holes drilled within 2 km of one another and along a spreading-parallel corridor (see Expedition 304 Site U1309 Site Summary). H...
متن کاملLocating the spreading axis along 80 km of the Mid-Atlantic Ridge south of the Atlantis Transform
The zone of active eruptive fissuring (the “spreading axis”) is investigated at an accretionary segment of the Mid-Atlantic Ridge. High-resolution side-scan images are used to produce a detailed geologic map of the median valley floor of Segment 18, located immediately south of the Atlantis Transform (30oN). The spreading axis is defined by distinguishing between primary eruptive vents (seamoun...
متن کاملIodp Expedition 304: Ocean Core Complex Formation, Atlantis Massif Site U1309 Summary
Hole U1309A: Latitude: 30° 10.1081' N, Longitude: 42° 07.1101' W, 1643 mbsl Hole U1309B: Latitude: 30° 10.1081' N, Longitude: 42° 07.1101' W, 1643 mbsl Hole U1309C: Latitude: 30° 10.1081' N, Longitude: 42° 07.1209' W, 1638 mbsl Hole U1309D: Latitude: 30° 10.1195' N, Longitude: 42° 07.1131' W, 1645 mbsl Hole U1309E: Latitude: 30° 10.1207' N, Longitude: 42° 07.1057' W, 1644 mbsl Hole U1309F: Lati...
متن کاملShear wave splitting and crustal anisotropy at the Mid-Atlantic Ridge, 35 N
[1] Shear wave splitting observed in microearthquake data at the axis of the Mid-Atlantic Ridge near 35 N has a fast polarization direction that is parallel to the trend of the axial valley. The time delays between fast and slow S wave arrivals range from 35 to 180 ms, with an average of 90 ms, and show no relationship with ray path length, source-toreceiver azimuth, or receiver location. The a...
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ژورنال
عنوان ژورنال: Geochemistry, Geophysics, Geosystems
سال: 2006
ISSN: 1525-2027
DOI: 10.1029/2005gc001109