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RRS Discovery D136
Cruise summary report
Cruise Info. | |
Ship name (ship code) | RRS Discovery (74E3) |
Cruise identifier | D136 |
Cruise period | 1983-04-29 — 1983-05-15 |
Status | Completed |
Port of departure | Patrai, Greece |
Port of return | Patrai, Greece |
Purpose | Research |
Objectives | This cruise was intended to furnish data and samples to contribute towards a detailed investigation if Pliocene and Quaternary slope and deep-sea sedimentation patterns associated with the central part of the Hellenic Trench system, in eastern Mediterranean. Such data is required to evaluate the influence of climatic and structural controls on the dominant sedimentary processes and to elucidate recent sedimentary evolution of this tectonically active region. It was intended to carry out a programme of high-resolution seismic reflection profiling with air-gun and high frequency (3.5 kHz) pinger sources, in order to determine the geometry and structure of sediments to depths of a few hundreds of metres below the sea-floor. Ship-board analysis of this profiling survey could then be used to select appropriate sites for piston-and gravity-coring, dredging and sea-floor photography. |
Chief scientist | Gilbert Kelling (University of Keele Department of Geology) |
Cruise report | (0.32 MB) |
Ocean/sea areas | |
General | Ionian Sea (Mediterranean Sea) Aegean Sea (The Archipelago) (Mediterranean Sea) Mediterranean Sea - Eastern basin |
Specific | W. & S. of Greece & Crete (Med.) |
Track charts | |
Measurements | |
Geology and geophysics | |
Dredge | Quantity: number of deployments = 1 |
Core - soft bottom | Quantity: number of cores = 24 Description: 20 stations |
Bottom photography | Quantity: number of deployments = 4 |
Single-beam echosounding | Quantity: track kilometres = 3908 |
Long/short range side scan sonar | Quantity: track kilometres = 3111 |
Single channel seismic reflection | Quantity: track kilometres = 2102 |
Gravity measurements | Quantity: track kilometres = 3274 |
Magnetic measurements | Quantity: track kilometres = 1439 |
Other geological/geophysical measurements | Quantity: track kilometres = 3343 Description: 3.5kHz profiling |