| Plattform Platform |
Reise-Nr. Cruise-No. |
Zeitraum Period |
Projekt Project |
Arbeitsgebiet Working area |
|---|---|---|---|---|
| Sonne | SO297 PISAGUA | 24.02.2023 - 11.04.2023 | Pacific Ocean |
| Fahrtleiter Chief Scientist | Institut Institute | Auslaufhafen Port of departure | Einlaufhafen Port of return | Stationskarte Station map | Schiffsroute Trackchart |
|---|---|---|---|---|---|
| Lange Dietrich | Helmholtz Centre for Ocean Research Kiel (GEOMAR) | Talcahuano | Guayaquil |
Ziel der Reise / Objectives of Cruise:
The purpose of the cruise was to acquire refraction seismic data offshore North-Central Chile focusing on the region of the incoming oceanic plate and marine forearc at latitudes of the Taltal and Copiapo ridge. In general, this region was only sparsely mapped with modern multibeam. Furthermore, we installed five absolute pressure sensors. After leaving the harbor of Talcahuano, we arrived at the Copiapo ridge (~26.5?) on 27th February 2023, where we acquired seismic refraction (39 OBS) data together with multibeam data along a profile until 5th March. After a short transit to the North, we reached the region of a 3D refraction experiment where we installed 42 OBS/OBH stations covering an area of 60x90 nm. The area was various times mapped with multibeam during the installation and shooting of the refraction experiment, which lasted until 20 March. We started to lay out 41 OBS/OBH stations along a ~140 nm long profile at latitudes of 22?22.8'S, an uncharted region. The profile and a small anisotropy experiment (5 OBS/OBH) were carried out, and all OBS/OBH were dissembled on 30th March 2022. The remaining days until 2nd April at 23:59 were devoted to the installation and visit of pressure sensors, and we mapped uncharted regions in various locations, particularly during the nights. Between 2nd April and 4th April at 23:59 April RV Sonne headed towards Guayaquil and mapped continuously uncharted seafloor.
Messungen / Measurements
| Institut Institute |
Wissenschaftler Scientist |
Anzahl Number |
Einheit Unit |
Typ der Messungen Type of measurements |
Kommentar Comments |
Daten im DOD Data in DOD |
|---|---|---|---|---|---|---|
| GEOMAH | Lange Dietrich | 2151 | km | G26 Seismic refraction (no.of nautical miles) |
G-gun refraction lines and 3D experiment. A 100 m-long MCS streamer was towed during most of the refraction experiments. | yes |
| GEOMAH | Lange Dietrich | 4200 | km | G74 Multi-beam echosounding |
EM122 | yes |
| GEOMAH | Lange Dietrich | 228 | km | G76 Multichannel seismic reflection |
100 m streamer profile with G-gun | yes |
| GEOMAH | Lange Dietrich | 4200 | km | G90 Other geological or geophysical measurements |
Parasound | yes |
| GEOMAH | Lange Dietrich | 252 | stations | H00 Stations |
- | yes |
| GEOMAH | Lange Dietrich | 4 | stations | H10 CTD-Stations |
CTD for sound velocity profile in water. Now water samples were taken. | yes |
| BRIRE | Briese Schifffahrts GmbH & Co. WTD | 1 | n miles | H80 Other physical measurements |
Underway measurements udring the whole trip such as coordinates, depth, meteorological parameter and so on | yes |
Verankerungen / Moorings
| Institut Institute |
Wissenschaftler Scientist |
Typ der Messungen Type of measurements |
Kommentar Comments |
geogr.Breite Latitude |
geogr.Länge Longitude |
Daten im DOD Data in DOD |
|---|---|---|---|---|---|---|
| GEOMAH | Lange Dietrich | G26 | 39 OBS/OBH refraction seismic deployment and recovery during SO297, offshore Copiapo | 27° 30.0' S | 73° 0.0' W | - |
| GEOMAH | Lange Dietrich | G26 | 42 OBS/OBH 3D refraction seismic deployment and recovery during SO297, offshore Taltal | 22° 22.0' S | 71° 15.0' W | - |
| GEOMAH | Lange Dietrich | G26 | 5 OBS/OBH refraction seismic deployment and recovery during SO297, anisotropy experiment | 22° 22.0' S | 73° 15.0' W | - |
| GEOMAH | Lange Dietrich | G26 | Profile of 41 OBS/OBH instruments for seismic refraction profile. Installation and recovery during SO294, offshore Taltal | 25° 22.0' S | 72° 0.0' W | - |
| GEOMAH | Lange Dietrich | G72 | 5 OBP, long-term deployment of drift-free pressure sensors. Deployed during SO297. Installation time is more than two years. | 22° 22.0' S | 71° 15.0' W | - |