Woods Hole Oceanographic Institution
Cruise Planning Synopsis
AT39-04 Rio Grande Rise | |
Ship | |
| R/V Atlantis | |
Cruise Party | |
| Antonius Koppers: Chief Scientist, Principal Investigator Oregon State University, CEOAS 104 CEOAS Admin Bldg Corvallis, Oregon United States 97331 +1 541 737 5425 akoppers@ceoas.oregonstate.edu | |
| - added Antonius Koppers as Chief Scientist on Aug 24, 2017 9:23 PM by Elizabeth A. Caporelli | |
| - added Antonius Koppers as Principal Investigator on Aug 24, 2017 9:23 PM by Elizabeth A. Caporelli |
Departure: Dec 16, 2017 | |
| Montevideo, Uruguay | |
Arrival: Feb 3, 2018 | |
| Praia, Cape Verde Islands | |
Operations Area | |
| Between 28-39ÃÂðS in the South Atlantic | |
| - changed Between 28-39ðS in the South Atlantic to Between 28-39ÃÂðS in the South Atlantic on Nov 15, 2017 2:14 PM by Sarah Fuller | |
| - changed Between 28-39°S in the South Atlantic to Between 28-39ðS in the South Atlantic on Sep 18, 2017 12:07 PM by Elizabeth A. Caporelli | |
| - changed Between 28-39°S in the South Atlantic to Between 28-39°S in the South Atlantic on Sep 18, 2017 12:06 PM by Elizabeth A. Caporelli | |
| - changed Between 28-39ðS in the South Atlantic to Between 28-39°S in the South Atlantic on Aug 24, 2017 9:28 PM by Elizabeth A. Caporelli | |
| - changed Between 28-39ÃÂÃÂÃÂðS in the South Atlantic to Between 28-39ðS in the South Atlantic on Aug 24, 2017 9:23 PM by Elizabeth A. Caporelli | |
| - changed Between 28-39ÃÂðS in the South Atlantic to Between 28-39ÃÂÃÂÃÂðS in the South Atlantic on Aug 24, 2017 9:27 PM by Elizabeth A. Caporelli | |
| - Between 28-39ÃÂðS in the South Atlantic on Aug 24, 2017 9:24 PM by Elizabeth A. Caporelli | |
| Lat/Lon: 23° 0.034′ S / 38° 0.737′ W | |
| - set lat to 23° 0.034′ S, set lon to 38° 0.737′ W on Aug 24, 2017 9:24 PM by Elizabeth A. Caporelli | |
| Depth Range: min / max (m) | |
| - set max to max (m) on Aug 24, 2017 9:24 PM by Elizabeth A. Caporelli | |
| Will the vessel be operating within 200 NM of a foreign country? | no |
Science Objectives | |
| The Rio Grande Rise (RGR) in the South Atlantic is an oceanic plateau that formed on, or close to the Mid-Atlantic Ridge (MAR) along with Walvis Ridge (WR). Volumetrically RGR is about twice WR and the young end of the Tristan-Gough hotspot trail (Guyot Province) combined. RGR and WR connect to the once conjunct Paranà-Etendeka large igneous province (LIP) and together they feature ~130 Myr of intra-plate volcanism. It is a rare example of a well-preserved conjugate intra-plate system with volcanic records on two tectonic plates. Yet, RGR truly is terra incognita for which only one DSDP site into igneous basement and one basalt dredge are available. Based on these few samples, it appears that RGR formed roughly between 70 and 90 Ma whereas isotopic analyses tell us that RGR sampled similar mantle sources as WR. New plate reconstructions suggest that RGR and the older part of WR formed together along the edges of one or several microplates. In addition, the formation site of RGR-WR aligns with the projected edge of the African LLSVP and this relationship makes RGR-WR a globally unique, long-standing window to the core-mantle boundary. RGR thus provides a unique opportunity to address a wide range of questions relating to plate tectonics, plume dynamics and lower mantle characterization: If formed as two paired aseismic ridges, why is RGR’s morphology so different from WR? Did RGR form along the edges of micro-plates? Is RGR itself age-progressive or did it form as a single volcanic edifice? Is RGR geochemically triple-zoned in a similar fashion as the Guyot Province in the WR? What geochemical components dominate the RGR plume source related to the African LLSVP? What are the consequences of the answers to the above questions for plume zonation and plume dynamic models, our understanding of sources related to LLSVPs, the opening of the Atlantic basin, and global tectonic modeling? | |
| - The Rio Grande Rise (RGR) in the South Atlantic is an oceanic plateau that formed on, or close to the Mid-Atlantic Ridge (MAR) along with Walvis Ridge (WR). Volumetrically RGR is about twice WR and the young end of the Tristan-Gough hotspot trail (Guyot Province) combined. RGR and WR connect to the once conjunct Paranà-Etendeka large igneous province (LIP) and together they feature ~130 Myr of intra-plate volcanism. It is a rare example of a well-preserved conjugate intra-plate system with volcanic records on two tectonic plates. Yet, RGR truly is terra incognita for which only one DSDP site into igneous basement and one basalt dredge are available. Based on these few samples, it appears that RGR formed roughly between 70 and 90 Ma whereas isotopic analyses tell us that RGR sampled similar mantle sources as WR. New plate reconstructions suggest that RGR and the older part of WR formed together along the edges of one or several microplates. In addition, the formation site of RGR-WR aligns with the projected edge of the African LLSVP and this relationship makes RGR-WR a globally unique, long-standing window to the core-mantle boundary. RGR thus provides a unique opportunity to address a wide range of questions relating to plate tectonics, plume dynamics and lower mantle characterization: If formed as two paired aseismic ridges, why is RGR’s morphology so different from WR? Did RGR form along the edges of micro-plates? Is RGR itself age-progressive or did it form as a single volcanic edifice? Is RGR geochemically triple-zoned in a similar fashion as the Guyot Province in the WR? What geochemical components dominate the RGR plume source related to the African LLSVP? What are the consequences of the answers to the above questions for plume zonation and plume dynamic models, our understanding of sources related to LLSVPs, the opening of the Atlantic basin, and global tectonic modeling? on Aug 24, 2017 9:24 PM by Elizabeth A. Caporelli | |
Science Activities | |
| program includes (i) 9.9 days of multibeam mapping around our dredge targets; (ii) 9.7 days of transit and mapping between targets, including mapping of the RGR rift zones; (iii) 10.8 days for 40 dredging operations; (vi) 2 bad weather days. 24/7 dredge operations, Towed magnetometer, Gravity measurements, EM122 multibeam mapping | |
| - program includes (i) 9.9 days of multibeam mapping around our dredge targets; (ii) 9.7 days of transit and mapping between targets, including mapping of the RGR rift zones; (iii) 10.8 days for 40 dredging operations; (vi) 2 bad weather days. 24/7 dredge operations, Towed magnetometer, Gravity measurements, EM122 multibeam mapping on Aug 24, 2017 9:24 PM by Elizabeth A. Caporelli | |
Additional Info | |
| Pre-cruise Planning Meeting: Teleconference | |
| - Teleconference on Aug 24, 2017 9:24 PM by Elizabeth A. Caporelli | |
| Meeting Notes: Pre-cruise meeting 8/25 | |
| - -changed to Pre-cruise meeting 8/25 on Sep 18, 2017 12:07 PM by Elizabeth A. Caporelli | |
| - on Aug 24, 2017 9:24 PM by Elizabeth A. Caporelli | |
Stations: | |
Supporting documentation: | |
| »Dredge.Targets.US.Cruise.xlsx | |
| - added Dredge.Targets.US.Cruise.xlsx on Sep 18, 2017 12:05 PM by Elizabeth A. Caporelli | |
| - -added on Aug 24, 2017 9:28 PM by Elizabeth A. Caporelli | |
| - -removed | |
| - on Aug 24, 2017 9:24 PM by Elizabeth A. Caporelli | |
Funding |
| Funding Agency: NSF | |
| Grant or contract number: 1558681 |
Scientific Instrumentation for R/V Atlantis |
Shipboard Equipment | |||||||||||
| Bathymetry System 12 kHz, | |||||||||||
| Sippican XBT System (Mark 21), | |||||||||||
| Bathymetry System 3.5 kHz , | |||||||||||
| 12 kHz Pinger for Wire Use, | |||||||||||
| Navigation - Heading, | |||||||||||
| Multibeam , | |||||||||||
| Navigation - Position, | |||||||||||
Gravimeter  , | |||||||||||
| Towed Magnetometer | |||||||||||
| -added 12 kHz Pinger for Wire Use on Aug 24, 2017 9:23 PM by Elizabeth A. Caporelli | |||||||||||
| -added Gravimeter on Aug 24, 2017 9:23 PM by Elizabeth A. Caporelli | |||||||||||
| -added Towed Magnetometer on Aug 24, 2017 9:23 PM by Elizabeth A. Caporelli | |||||||||||
| -added Bathymetry System 12 kHz on Aug 24, 2017 9:23 PM by Elizabeth A. Caporelli | |||||||||||
| -added Bathymetry System 3.5 kHz on Aug 24, 2017 9:23 PM by Elizabeth A. Caporelli | |||||||||||
| -added Multibeam on Aug 24, 2017 9:23 PM by Elizabeth A. Caporelli | |||||||||||
| -added Navigation - Heading on Aug 24, 2017 9:23 PM by Elizabeth A. Caporelli | |||||||||||
| -added Navigation - Position on Aug 24, 2017 9:23 PM by Elizabeth A. Caporelli | |||||||||||
| -added Sippican XBT System (Mark 21) on Aug 24, 2017 9:23 PM by Elizabeth A. Caporelli | |||||||||||
Shipboard Communication | |||||||||||
| Basic Internet access via HiSeasNet, | |||||||||||
| Is there a need to transfer data to shore on a regular basis?, | |||||||||||
| Is there an expectation to use Skype or any other real-time video conference program? | |||||||||||
| -added Basic Internet access via HiSeasNet on Aug 24, 2017 9:23 PM by Elizabeth A. Caporelli | |||||||||||
| -added Is there a need to transfer data to shore on a regular basis? on Aug 24, 2017 9:23 PM by Elizabeth A. Caporelli | |||||||||||
| -added Is there an expectation to use Skype or any other real-time video conference program? on Aug 24, 2017 9:23 PM by Elizabeth A. Caporelli | |||||||||||
Critical CTD Sensors | |||||||||||
| Storage Notes: 10 wire racks for storing dredge bags for shipment back to OSU Marine and Geology Repository | |||||||||||
| - added 10 wire racks for storing dredge bags for shipment back to OSU Marine and Geology Repository on Aug 24, 2017 9:23 PM by Elizabeth A. Caporelli | |||||||||||
Navigation | |||||||||||
| Will you be using Long Base Line (LBL) navigation? | no | ||||||||||
| - added no on Aug 24, 2017 9:23 PM by Elizabeth A. Caporelli | |||||||||||
| How many nets? | null | ||||||||||
| How many tansponders? | null | ||||||||||
| Will you be using Ultra-short baseline (USBL) navigation? | no | ||||||||||
| - added no on Aug 24, 2017 9:23 PM by Elizabeth A. Caporelli | |||||||||||
Navigation | |||||||||||
| GPS | |||||||||||
| -added GPS on Aug 24, 2017 9:23 PM by Elizabeth A. Caporelli | |||||||||||
| Navigation Notes: | |||||||||||
| Winch Notes: Wire needed for dredging. We will be dredging deep, up to 5-6 km water depth. Having 10 km of wire available would be important. | |||||||||||
| - added Wire needed for dredging. We will be dredging deep, up to 5-6 km water depth. Having 10 km of wire available would be important. on Aug 24, 2017 9:23 PM by Elizabeth A. Caporelli | |||||||||||
| Winch Notes: Dredging only up to 5-6 km water depth. | |||||||||||
| - added Dredging only up to 5-6 km water depth. on Aug 24, 2017 9:23 PM by Elizabeth A. Caporelli | |||||||||||
Standard Oceanographic Cables | |||||||||||
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Specialized Deck Equipment | |||||||||||
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Over the Side Equipment | |||||||||||
| Will you be bringing any equipment (winches, blocks, etc.) that lowers instruments over the side? | no | ||||||||||
Special Requirements | |||||||||||
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| Science Stowage Revisions - Science Stowage : changed from - Science Stowage : added no on Aug 24, 2017 9:23 PM by Elizabeth A. Caporelli - Identify : added 10 wire racks for rocks; 3 palettes of equipment on Aug 24, 2017 9:23 PM by Elizabeth A. Caporelli | |||||||||||
| Inter/intraship Communications Revisions - Water : changed from - Water : added no on Aug 24, 2017 9:23 PM by Elizabeth A. Caporelli - Identify : added For cleaning rocks after sawing on Aug 24, 2017 9:23 PM by Elizabeth A. Caporelli | |||||||||||
Additional Cruise Items/Activities | |||||||||||
| Explosive Devices: | no | ||||||||||
| Portable Air Compressors: | no | ||||||||||
| Flammable Gases: | no | ||||||||||
| Small Boat Operations: | no | ||||||||||
| SCUBA Diving Operations: | no | ||||||||||
Hazardous Material | |||||||||||
| Will hazardous material be utilized? | no | ||||||||||
| - added no on Aug 24, 2017 9:23 PM by Elizabeth A. Caporelli | |||||||||||
| Describe deployment method and quantity: | |||||||||||
Radioactive Material | |||||||||||
| Radioiosotopes: | no | ||||||||||
Additional Information | |||||||||||
| Is night time work anticipated on this cruise? | yes | ||||||||||
| - added yes on Aug 24, 2017 9:23 PM by Elizabeth A. Caporelli | |||||||||||
| Specialized tech support (Seabeam, coring, other): This is a dredging cruise with often 24 hour dredging operations. We therefore require 2 restechs so we can operate day and night in a continuous dredging mode, if so required. | |||||||||||
| - added This is a dredging cruise with often 24 hour dredging operations. We therefore require 2 restechs so we can operate day and night in a continuous dredging mode, if so required. on Aug 24, 2017 9:23 PM by Elizabeth A. Caporelli | |||||||||||
| Other required equipment and special needs: Rock saw area. Portable Sink From STR:• 24/7 dredge operations with two experienced restechs • At least 5 spare dredges • Towed magnetometer • Gravity measurements • EM122 multibeam mapping | |||||||||||
| - added Rock saw area. Portable Sink From STR:• 24/7 dredge operations with two experienced restechs • At least 5 spare dredges • Towed magnetometer • Gravity measurements • EM122 multibeam mapping on Aug 24, 2017 9:23 PM by Elizabeth A. Caporelli | |||||||||||
Checklist & Notes |
Checklist | |
| U.S. Customs Form: | yes |
| - changed from | |
| - added yes on Aug 24, 2017 9:26 PM by Elizabeth A. Caporelli | |
| Diplomatic Clearance: | no |
| - added no on Aug 24, 2017 9:26 PM by Elizabeth A. Caporelli | |
| Date Submitted: | |
| Date Approved: | |
| Agent Information: | |
| Countries: | |
| Notes: | |
| Isotope Use Approval: | no |
| - added no on Aug 24, 2017 9:26 PM by Elizabeth A. Caporelli | |
| Isotope Notes: | |
| SCUBA Diving: | no |
| - added no on Aug 24, 2017 9:26 PM by Elizabeth A. Caporelli | |
Checklist | |
| SSSG Tech: | |
| Some equipment will be loaded at WHOI before Oct 2nd 2017 including dredges and dredge gear. Magnetometer, cable, winch and spare will be shipped to Barbados. | |
| - added Some equipment will be loaded at WHOI before Oct 2nd 2017 including dredges and dredge gear. Magnetometer, cable, winch and spare will be shipped to Barbados. on Aug 24, 2017 9:26 PM by Elizabeth A. Caporelli | |