Deepwater Exploration of the Marianas

EX1605

NOAA expedition EX1605L1 (red symbols) and EX1605L3 (blue symbols) sampled hydrothermal vent sites, mud volcanoes, deep-sea coral and seamounts in and around the Marianas Trench Marine National Monument (MTMNM) and the Commonwealth of the Northern Mariana Islands (CNMI). Samples were obtained using the submersible Deep Discoverer. OSU marine repository archives the rock samples collected during the expedition. Archived samples include basalts, fossil corals, sulfides and more. Below are the samples recovered from each dive. 

For more information please visit the dedicated NOAA Page and Background Information

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Dive sample tables: click to expand

Collection Metadata
IGSNLatitudeLongitudeDepth (m)Feature NamePrincipal Rock TypeTemp (C)Salinity (PSU)Oxygen (mg/l)
OSU-EX1605L1-D1-112.86144.30596.08Santa Rosa NorthBasalt5.7729534.48534-
OSU-EX1605L1-D1-212.86144.31544.69Santa Rosa NorthCarbonate5.7634.49-
OSU-EX1605L1-D2-212.73144.27543.49Santa Rosa SouthCarbonate6.6834.46-
OSU-EX1605L1-D2-312.73144.27346.70Santa Rosa SouthCarbonate7.8734.39-
OSU-EX1605L1-D3-112.54144.614967.80Sirena CanyonBasalt with Mn Crust1.5134.74-
OSU-EX1605L1-D3-312.54144.614899.31Sirena CanyonSedimentary Rock1.5134.69-
OSU-EX1605L1-D4-111.42144.783781.07Enigma SeamountMn-crusted basalt1.5434.68-
OSU-EX1605L1-D4-211.42144.783754.53Enigma SeamountMn-crusted basalt1.5434.69-
OSU-EX1605L1-D4-411.41144.783684.11Enigma SeamountBasalt1.5334.69-
OSU-EX1605L1-D5-112.69143.752970.72Fina Nagu Caldera DMn-crusted basalt1.6834.67-
OSU-EX1605L1-D5-212.69143.752938.79Fina Nagu Caldera DMn-crusted basalt1.6834.67-
OSU-EX1605L1-D5-512.70143.752675.63Fina Nagu Caldera DMn-crusted basalt1.734.66-
OSU-EX1605L1-D6-112.80143.782737.82Fina Nagu Caldera CBasalt1.7534.66-
OSU-EX1605L1-D6-312.80143.792578.12Fina Nagu Caldera CBasalt1.7534.66-
OSU-EX1605L1-D7-112.86143.832297.98Fina Nagu Caldera CHydrothermal Vent Sulphide1.9934.65-
OSU-EX1605L1-D7-312.86143.832294.69Fina Nagu Caldera CBasalt234.65-
OSU-EX1605L1-D8-214.02144.641209.69NW Guam SeamountMn-crusted basalt3.7634.57-
OSU-EX1605L1-D9-115.44144.514056.10Fresh Lava FlowsPillow Extrusion1.6634.68-
OSU-EX1605L1-D9-215.44144.504047.90Fresh Lava FlowsPillow Basalt1.6534.68-
OSU-EX1605L1-D9-315.43144.504062.46Fresh Lava FlowsPillow extrusion1.6534.68-
OSU-EX1605L1-D10-115.49144.513820.63New Hydrothermal Vent Field 1Basalt1.6334.68-
OSU-EX1605L1-D10-215.49144.513807.96New Hydrothermal Vent Field 1Basalt1.6334.68-
OSU-EX1605L1-D11-116.96144.873286.86New Hydrothermal Vent Field 2Hydrothermal sulfide1.6834.67-
OSU-EX1605L1-D13-116.03147.113677.32Kunanaf HuloMn-encrusted rock1.534.69-
OSU-EX1605L1-D14-115.90148.892004.65Pigafetta GuyotMn-crusted rock2.0734.63-
OSU-EX1605L1-D15-115.00148.522266.41Enrique GuyotMn-crusted rock1.9134.65-
OSU-EX1605L1-D17-216.13146.08258.39Farallon De MenidillaCarbonate18.2534.87-
OSU-EX1605L3-D1-115.79146.01530.24FDM2Sedimentary6.0734.34-
OSU-EX1605L3-D1-315.80146.01488.79FDM2Basalt6.7334.29-
OSU-EX1605L3-D2-118.18145.82372.01PaganAndesite10.7434.26-
OSU-EX1605L3-D2-318.18145.82332.94PaganBasalt13.7534.44-
OSU-EX1605L3-D2-518.18145.82287.81PaganBasalt14.5034.50-
OSU-EX1605L3-D3-220.05145.23358.57MaugFossil Coral15.1034.56-
OSU-EX1605L3-D3-420.05145.23345.99MaugBasalt15.1434.57-
OSU-EX1605L3-D4-120.48146.985983.07Hadal RidgeSedimentary1.6234.70-
OSU-EX1605L3-D5-120.43145.03360.14AhyiBasalt14.9234.54-
OSU-EX1605L3-D5-420.44145.03288.41AhyiBasalt16.7134.69-
OSU-EX1605L3-D5-320.44145.03259.14AhyiBasalt16.9334.72-
OSU-EX1605L3-D6-120.15145.10359.40Supply ReefMn Crust14.8834.54-
OSU-EX1605L3-D6-220.15145.10311.92Supply ReefBasalt16.2334.65-
OSU-EX1605L3-D6-420.15145.11286.28Supply ReefBasalt16.4734.68-
OSU-EX1605L3-D7-120.82144.71910.38Chamorro SeamountPumice4.5534.39-
OSU-EX1605L3-D7-220.82144.71896.44Chamorro SeamountSulfides4.5734.40-
OSU-EX1605L3-D7-520.82144.71859.01Chamorro SeamountPumice4.6634.37-
OSU-EX1605L3-D8-121.41144.15478.29Eifuku SeamountBasalt10.8234.24-
OSU-EX1605L3-D8-321.41144.15435.26Eifuku SeamountBasalt11.3834.28-
OSU-EX1605L3-D9-121.33144.19407.15Daikoku SeamountSulfides12.4834.34-
OSU-EX1605L3-D9-321.32144.19432.96Daikoku SeamountSulfides13.9934.40-
OSU-EX1605L3-D10-122.12145.143097.17Stegosaurus RidgeVolcaniclastic1.5334.66-
OSU-EX1605L3-D10-522.12145.143091.08Stegosaurus RidgeSedimentary1.5234.66-
OSU-EX1605L3-D10-422.12145.143089.66Stegosaurus RidgePumice1.5334.66-
OSU-EX1605L3-D11-122.40145.224413.55North Forearc RidgeBasalt1.4934.68-
OSU-EX1605L3-D11-222.40145.214238.21North Forearc RidgeSerpentinite1.4834.68-
OSU-EX1605L3-D12-121.57145.523306.73Unnamed Forearc SeamountSerpentinite1.5934.67-
OSU-EX1605L3-D12-321.57145.523309.45Unnamed Forearc SeamountSerpentinite1.5934.67-
OSU-EX1605L3-D13-221.42145.894827.93Twin PeaksSedimentary1.4934.69-
OSU-EX1605L3-D13-321.42145.894795.02Twin PeaksSedimentary1.4734.69-
OSU-EX1605L3-D14-120.68145.092442.71Explorer Ridge DeepSedimentary1.8434.64-
OSU-EX1605L3-D14-320.68145.092442.71Explorer Ridge DeepMud1.8434.64-
OSU-EX1605L3-D15-120.72145.061888.45Explorer Ridge ShallowBreccia2.1934.60-
OSU-EX1605L3-D18-120.62147.325693.36Petit-Spot VolcanoBasalt1.5934.69-
OSU-EX1605L3-D18-220.62147.335607.50Petit-Spot VolcanoHyaloclastite1.5934.70-
OSU-EX1605L3-D18-520.62147.335565.37Petit-Spot VolcanoSedimentary1.6134.66-
OSU-EX1605L3-D18-420.62147.335542.01Petit-Spot VolcanoSedimentary1.5634.69-
OSU-EX1605L3-D19-119.80148.441943.77Vogt GuyotBasalt2.2634.61-
OSU-EX1605L3-D20-118.45147.834387.29Subducting Guyot 2Basalt1.4734.69-
OSU-EX1605L3-D21-116.56147.595902.66Hadal WallBreccia1.5934.70-
OSU-EX1605L3-D21-216.56147.595817.13Hadal WallBasalt1.5934.70-
OSU-EX1605L3-D21-416.56147.595812.67Hadal WallBasalt1.5934.71-
EX1605L1-D13 (Kunanaf Hulo)
Sample Location Rock Type Description Images
OSU-EX1605L1-D13-1 16.03°N, 147.11°E Serpentinite A serpentinized mafic rock… Image 2Image 3Image 4Image 4Image 4Image 4Image 4Image 4Image 4Image 4
EX1605L1-D17 (Farallon De Menidilla)
Sample Location Rock Type Description Images
OSU-EX1605L1-D17-2 16.13°N, 146.08°E Coral A large piece of fossil coral… Image 4Image 4Image 4Image 4Image 4Image 4Image 4Image 4Image 4Image 4Image 4
EX1605L3-D3 (Maug)
Sample Location Rock Type Description Images
OSU-EX1605L3-D3-2 20.05°N, 145.23°E Fossil Coral A chunk of fossil coral with a few broken stems… Image 4Image 4Image 4Image 4Image 4Image 4Image 4Image 4Image 4
OSU-EX1605L3-D3-4 20.05°N, 145.23°E Basalt A plagioclase and olivine phyric basalt with a cryptocrystalline groundmass… Image 2Image 3Image 4
EX1605L3-D4 (Hadal Ridge)
Sample Location Rock Type Description Images
OSU-EX1605L3-D4-1 20.48°N, 146.98°E Siltstone A very fine carbonate rich siltstone… Image 2Image 3Image 4Image 4Image 4Image 4Image 4Image 4Image 4Image 4Image 4Image 4
EX1605L3-D13 (Twin Peaks)
EX1605L3-D14 (Explorer Ridge)
Sample Location Rock Type Description Images
OSU-EX1605L3-D14-1 20.68°N, 145.09°E Tephra/Siltstone A multi-layered sedimentary rock with layers of tephra and fine silt… Image 2Image 3Image 4Image 4Image 4Image 4Image 4Image 4Image 4Image 4Image 4Image 4Image 4Image 4
OSU-EX1605L3-D14-3 20.68°N, 145.09°E Mud A plastic jar with fine grained mud….
EX1605L3-D20 (Unnamed Subducting Guyot)