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  • 1
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    Rare and trace element analyses from DSDP Holes 31-291 and 31-294 from the Philippine Sea
    PANGAEA
    In:  Supplement to: Bonatti, Enrico; Kolla, V; Moore, Willard S; Stern, C (1979): Metallogenesis in marginal basins: Fe-rich basal deposits from the Philippine Sea. Marine Geology, 32(1-2), 21-37, https://doi.org/10.1016/0025-3227(79)90144-0
    Details
    Publication Date: 2023-06-27
    Description: Metal-rich sediments were found in the West Philippine Basin at DSDP sites 291 (located about 500 km SW of the Philippine Ridge or Central Basin Fault) and 294/295 (located about 580 km NE of the Philippine Ridge). In both cases the metalliferous deposits constitute a layer, probably Eocene in age, resting directly above the basaltic basement at the bottom of the sediment column. The chemistry of the major (including Fe and Mn) and trace elements (including trace metals, rare earth elements, U and Th) suggest a strong similarity of these deposits to metalliferous deposits produced by hydrothermal activity at oceanic spreading centers. Well-crystallized hematite is a major component of the metal-rich deposits at site 294/295. We infer that the Philippine Sea deposits were formed at some spreading center by hydrothermal processes of metallogenesis, similar to processes occurring at oceanic spreading centers. A locus for their formation might have been the Philippine Ridge (Central Basin Fault), probably an extinct spreading center. We conclude that metallogenesis of the type occurring at oceanic spreading centers can take place also in marginal basins. This has implications for the origin of metal deposits found in some ophiolite complexes, such as those in Luzon (Philippines), which may represent fragments of former marginal basins rather than of oceanic lithosphere.
    Keywords: 31-291; 31-294; Deep Sea Drilling Project; DRILL; Drilling/drill rig; DSDP; Glomar Challenger; Leg31; North Pacific/Philippine Sea/BASIN; North Pacific/Philippine Sea/TRENCH
    Type: Dataset
    Format: application/zip, 4 datasets
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  • 2
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    (Table 3) Major and trace element analyses from DSDP Hole 31-291
    PANGAEA
    Details
    Publication Date: 2023-06-27
    Keywords: 31-291; Aluminium oxide; Atomic absorption spectrometry (AAS), Perkin-Elmer; Barium; Boron; Calcium carbonate; Calcium oxide; Chromium; Cobalt; Copper; Deep Sea Drilling Project; DRILL; Drilling/drill rig; DSDP; DSDP/ODP/IODP sample designation; Emission spectrometry; Glomar Challenger; Iron; Lanthanum; Lead; Leg31; Magnesium oxide; Manganese; Nickel; North Pacific/Philippine Sea/TRENCH; Potassium oxide; Sample code/label; Sample code/label 2; Scandium; Silicon dioxide; Sodium oxide; Titanium dioxide; Vanadium; Yttrium; Zinc; Zirconium
    Type: Dataset
    Format: text/tab-separated-values, 294 data points
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  • 3
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    (Table 5) Concentration of some rare earth elements in two samples of metal-rich sediment from DSDP Hole 31-294
    PANGAEA
    Details
    Publication Date: 2023-06-27
    Keywords: 31-294; Cerium; Deep Sea Drilling Project; DRILL; Drilling/drill rig; DSDP; DSDP/ODP/IODP sample designation; Europium; Glomar Challenger; Lanthanum; Leg31; Neodymium; North Pacific/Philippine Sea/BASIN; Samarium; Sample code/label; Sample code/label 2
    Type: Dataset
    Format: text/tab-separated-values, 14 data points
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  • 4
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    (Table 4) Major and trace element analyses from DSDP Hole 31-294
    PANGAEA
    Details
    Publication Date: 2023-06-27
    Keywords: 31-294; Aluminium oxide; Atomic absorption spectrometry (AAS), Perkin-Elmer; Barium; Boron; Calcium carbonate; Calcium oxide; Chromium; Cobalt; Copper; Deep Sea Drilling Project; DRILL; Drilling/drill rig; DSDP; DSDP/ODP/IODP sample designation; Emission spectrometry; Glomar Challenger; Iron; Lanthanum; Lead; Leg31; Magnesium oxide; Manganese; Nickel; North Pacific/Philippine Sea/BASIN; Potassium oxide; Sample code/label; Sample code/label 2; Scandium; Silicon dioxide; Sodium oxide; Titanium dioxide; Vanadium; Yttrium; Zinc; Zirconium
    Type: Dataset
    Format: text/tab-separated-values, 616 data points
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  • 5
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    (Table 6) U, Th, 234U/238U and 230Th/234U values in metal-rich deposits from DSDP Hole 31-294
    PANGAEA
    Details
    Publication Date: 2023-06-27
    Keywords: 31-294; Deep Sea Drilling Project; DRILL; Drilling/drill rig; DSDP; DSDP/ODP/IODP sample designation; Glomar Challenger; Leg31; North Pacific/Philippine Sea/BASIN; Sample code/label; Sample code/label 2; Thorium; Thorium-230/Uranium-234 activity ratio; Thorium-230/Uranium-234 activity ratio, standard deviation; Uranium; Uranium-234/Uranium-238 activity ratio; Uranium-234/Uranium-238 activity ratio, standard deviation
    Type: Dataset
    Format: text/tab-separated-values, 16 data points
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  • 6
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    Annotated record of the detailed examination of Fe hydroxide-sulfide deposits in the Romanche Area, Atlantic Ocean (1976)
    PANGAEA
    Details
    Publication Date: 2023-09-14
    Keywords: Atlantic Ocean; Comment; Deposit type; DEPTH, sediment/rock; Description; Dredge; DRG; File name; Gilliss; GS7309; GS7309-058-06; Identification; NOAA and MMS Marine Minerals Geochemical Database; NOAA-MMS; Position; Quantity of deposit; Sediment type; Size; Substratum; Uniform resource locator/link to image; Visual description
    Type: Dataset
    Format: text/tab-separated-values, 11 data points
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  • 7
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    (Tables 1-2, page 5) Major, trace and rare earth elements geochemistry of Fe hydroxide-sulfide concretions in the Romanche Area, Atlantic Ocean (1976)
    PANGAEA
    Details
    Publication Date: 2023-09-14
    Keywords: Aluminium oxide; Atlantic Ocean; Atomic absorption spectrometry (AAS); Barium; Boron; Calcium oxide; Cerium; Chromium; Cobalt; Copper; Deposit type; DEPTH, sediment/rock; Description; Dredge; DRG; Dysprosium; Erbium; Europium; Gadolinium; Gilliss; GS7309; GS7309-058-06; Identification; Iron oxide, Fe2O3; Lanthanum; Magnesium oxide; Manganese oxide; Neodymium; Nickel; NOAA and MMS Marine Minerals Geochemical Database; NOAA-MMS; Potassium oxide; Samarium; Sample code/label; Silicon dioxide; Sodium oxide; Titanium dioxide; Vanadium; Yttrium; Zinc; Zirconium
    Type: Dataset
    Format: text/tab-separated-values, 106 data points
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  • 8
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    Geochemistry on pryite concretions from the Romanche Trench (1976)
    PANGAEA
    In:  Supplement to: Bonatti, Enrico; Honnorez-Guerstein, B-M; Honnorez, Jose J; Stern, C (1976): Hydrothermal pyrite concretions from the Romanche trench (equatorial Atlantic): metallogenesis in oceanic fracture zones. Earth and Planetary Science Letters, 32(1), 1-10, https://doi.org/10.1016/0012-821X(76)90177-1
    Details
    Publication Date: 2023-09-14
    Description: Pyrite concretions a few centimeters in diameter were recovered from within the east-west valley of the Romanche fracture zone (equatorial Atlantic). Unconsolidated sediments are scarce or absent in this area of the Romanche Valley. Some of the sulfide concretions were transformed into Fe hydroxides by the action of seawater. The major element, trace metal, rare earth element and sulfur isotopic chemistry of these concretions suggest that they were deposited from Fe- and S-bearing hydrothermal solutions at or beneath the seafloor. These findings support the hypothesis that oceanic fracture zones are the locus of metallogenesis. Heat flow patterns suggest deep sub-seafloor hydrothermal circulation in the highly fractured offset zones. Metals and sulfur can be extracted by the hydrothermal waters from rocks present beneath the fracture zone (basalt, gabbro and serpentinite) and can also be supplied by mantle volatile sources. Important metal deposits appear to be aligned along the predrift land extension of some oceanic fracture zones.
    Keywords: Atlantic Ocean; Dredge; DRG; Gilliss; GS7309; GS7309-058-06; NOAA and MMS Marine Minerals Geochemical Database; NOAA-MMS
    Type: Dataset
    Format: application/zip, 2 datasets
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  • 9
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    Geochemical composition and radiocarbon ages of cores from Lago Fugnano, Tierra del Fuego (2010)
    PANGAEA
    In:  Supplement to: Waldmann, Nicolas D; Ariztegui, Daniel; Anselmetti, Flavio S; Austin, James A Jr; Moy, Christopher M; Stern, C; Recasens, Cristina; Dunbar, Robert B (2010): Holocene climatic fluctuations and positioning of the Southern Hemisphere westerlies in Tierra del Fuego (54° S), Patagonia. Journal of Quaternary Science, 25(7), 1063-1075, https://doi.org/10.1002/jqs.1263
    Details
    Publication Date: 2024-01-03
    Description: Recent advances in the chronology and the palaeoclimatic understanding of Antarctic ice core records point towards a larger heterogeneity of latitudinal climate fluctuations than previously thought. Thus, realistic palaeoclimate reconstructions rely in the development of a tight array of well-constrained records with a dense latitudinal coverage. Climatic records from southernmost South America are critical cornerstones to link these Antarctic palaeoclimatic archives with their South American counterparts. At 54° S on the Island of Tierra del Fuego, Lago Fagnano is located in one of the most substantially and extensively glaciated regions of southernmost South America during the Late Pleistocene. This elongated lake is the largest (~110km long) and non-ice covered lake at high southern latitudes. A multi-proxy study of selected cores allows the characterisation of a Holocene sedimentary record. Detailed petrophysical, sedimentological and geochemical studies of a complete lacustrine laminated sequence reveal variations in major and trace elements, as well as organic content, suggesting high variability in environmental conditions. Comparison of these results with other regional records allows the identification of major known late Holocene climatic intervals and the proposal for a time for the onset of the Southern Westerlies in Tierra del Fuego. These results improve our understanding of the forcing mechanisms behind climate change in southernmost Patagonia.
    Keywords: International Polar Year (2007-2008); IPY
    Type: Dataset
    Format: application/zip, 2 datasets
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  • 10
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    (Table 1) Geochemical composition of the tephra layers found in Lago Fagnano cores LF06-PC12 and LF06-PC16, Tierra del Fuego (2010)
    PANGAEA
    Details
    Publication Date: 2024-01-03
    Keywords: Barium; Caesium; Cerium; Dysprosium; Erbium; Europium; Event label; Gadolinium; Hafnium; Holmium; Lanthanum; Lead; LF06-PC12; LF06-PC16; Lutetium; Manganese; Micro X-ray fluorescence (µ-XRF); Neodymium; Niobium; PC; Piston corer; Praseodymium; Rubidium; Samarium; Sample type; Strontium; Tantalum; Terbium; Thorium; Thulium; Tierra del Fuego, South America; Titanium; Uranium; Ytterbium; Yttrium; Zirconium
    Type: Dataset
    Format: text/tab-separated-values, 58 data points
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