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  • Articles  (205,920)
  • Data  (155)
  • 1980-1984  (206,075)
  • 1984  (206,075)
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  • 1980-1984  (206,075)
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  • 1
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    Age model of sediment core RC10-216 (1984)
    PANGAEA
    In:  Supplement to: Sancetta, Constance A; Silvestri, Shaymaria (1984): Diatom stratigraphy of the late Pleistocene (Brunhes) subarctic Pacific. Marine Micropaleontology, 9(3), 263-274, https://doi.org/10.1016/0377-8398(84)90016-1
    Details
    Publication Date: 2024-05-02
    Description: Three piston cores in the subarctic region of the North Pacific show consistent changes in relative abundance of diatom species throughout the Brunhes magnetic epoch. These events can be used both as stratigraphic markers to subdivide the interval and as indicators of oceanographic conditions. The stratigraphic record shows an acme for A. ochotensis from about 625-350 Kyr (Isotope Stages 15-10); a marked increase in amplitude of abundance fluctuations for R. hebetata 300-0 Kyr (Stages 8-1), the extinction of R. curvirostris at 276 Kyr (Stage 8), and abundance fluctuations of D. seminae roughly in phase with the global oxygen isotope record from 450-0 Kyr (Stages 12-1). In the subarctic Pacific, an abrupt change in species abundance is not a reliable indicator of hiatus occurrence. Although details are not clear, there appears to have been a fundamental change of the subarctic gyre during the middle Brunhes (Stages 10-8 time), with more intense glacial intervals and stronger glacial-interglacial contrast occurring after that time. Coarse clastic detritus is not restricted to glacial intervals, suggesting that ice-rafting has occurred throughout the Brunhes interval; peak levels of ice-rafting may occur during ice-growth and decay, as well as during short intervals within a stage.
    Keywords: Age model; Calculated; DEPTH, sediment/rock; Lamont-Doherty Earth Observatory, Columbia University; LDEO; PC; Piston corer; RC10; RC10-216; Robert Conrad; Sedimentation rate
    Type: Dataset
    Format: text/tab-separated-values, 3 data points
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  • 2
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    (Table 2) Potassium, argon and K-Ar dates of the Mazagan granodiorite at V30-225, VA79-96KD and DSDP Hole 79-544A, off Moroccan coast (1984)
    PANGAEA
    Details
    Publication Date: 2024-04-27
    Keywords: 79-544A; 96KD; Age, 40K/40Ar Potassium-Argon; Age, dated; Age, dated standard deviation; Argon-40; Argon-40, standard deviation; Charge; Deep Sea Drilling Project; Dredge, box; DRG_B; DRILL; Drilling/drill rig; DSDP; DSDP/ODP/IODP sample designation; Elevation of event; Event label; Flame photometry; Glomar Challenger; Latitude of event; Leg79; Lithology/composition/facies; Longitude of event; Mass spectrometry; North Atlantic/PLATEAU; off West Africa; PC; Piston corer; Potassium; Potassium, standard deviation; Replicates; Sample code/label; Size fraction; V30; V30-225; VA-28/2; VA79-96KD; Valdivia (1961); Vema
    Type: Dataset
    Format: text/tab-separated-values, 194 data points
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  • 3
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    (Table 1) Geochemical composition of the Mazagan granodiorite at DSDP Hole 79-544A (1984)
    PANGAEA
    Details
    Publication Date: 2024-04-27
    Keywords: 79-544A; Albite; Aluminium oxide; Anorthite; Apatite; Barium; Biotite; Calcite; Calcium oxide; Calculated; Cerium; Chromium; CIPW Norm; Cobalt; Copper; Deep Sea Drilling Project; Diopside; DRILL; Drilling/drill rig; DSDP; DSDP/ODP/IODP sample designation; Epidote; Glomar Challenger; Hypersthene; Ilmenite; Iron oxide, Fe2O3; Leg79; Lithology/composition/facies; Loss on ignition; Magnesium oxide; Magnetite; Manganese oxide; Molybdenum; Muscovite; Nickel; Niobium; North Atlantic/PLATEAU; Orthoclase; Phosphorus pentoxide; Potassium oxide; Quartz; Rubidium; Sample code/label; Sample code/label 2; Silicon dioxide; Sodium oxide; Strontium; Sum; Thorium; Titanium dioxide; Total; Tungsten; Vanadium; Wollastonite; X-ray fluorescence (XRF); Yttrium; Zinc; Zircon; Zirconium
    Type: Dataset
    Format: text/tab-separated-values, 94 data points
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  • 4
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    Geochemistry and K-Ar dates of the Mazagan granodiorite at V30-225, VA79-96KD and DSDP Hole 79-544A, off Moroccan coast (1984)
    PANGAEA
    In:  Supplement to: Kreuzer, H; Müller, P; Wissmann, Gerd; Reinecke, T (1984): Petrography and K-Ar dating of the Mazagan granodiorite, Deep Sea Drilling Project Leg 79, Holes 544A and 547B. In: Hinz, K; Winterer, EL; et al. (eds.), Initial Reports of the Deep Sea Drilling Project, Washington (U.S. Govt. Printing Office), 79, 543-549, https://doi.org/10.2973/dsdp.proc.79.118.1984
    Details
    Publication Date: 2024-04-27
    Description: Gneissic granodiorite was recovered by drilling at the base of the Mazagan escarpment, 100 km west of the Casablanca, Morocco, at 4000 m water depth. Coarse, predeformative muscovite yielded dates of -515 Ma, fine-grained muscovite of -455 Ma, biotite -360 and 335 Ma, and feldspar -315 Ma. These dates are tentatively correlated with the microscopic results. We assume a minimum age of middle Cambrian for the granodiorite, an Ordovician deformation and mylonitization, and a Late Carboniferous overprint under upper greenschist facies conditions.
    Keywords: Deep Sea Drilling Project; DSDP
    Type: Dataset
    Format: application/zip, 2 datasets
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  • 5
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    (Tables 1-2, pages 988-989) Major elements geochemistry and thorium, radium series nuclides activity measurements on manganese nodules and a ferromanganese crust from the MANOP Site S in the Pacific Ocean (1984)
    PANGAEA
    Details
    Publication Date: 2024-04-16
    Keywords: Alpha spectrometry; Barium; BC; Box corer; Copper; Counting, palynology; Deposit type; DEPTH, sediment/rock; Description; DISTANCE; Distance, maximum; Distance, minimum; Event label; Identification; Inductively coupled plasma atomic emission spectroscope (ICP-AES); Inductively coupled plasma - mass spectrometry (ICP-MS); Iron; K7905; K7905-054BC; K7905-062BC; K7905-066BC; K7905-075BC; K7905-091BC; K7905-101BC; K7905-104BC; Knorr; Manganese; MANOP; MANOP Site S, Pacific Ocean; Mass; Nickel; NOAA and MMS Marine Minerals Geochemical Database; NOAA-MMS; Position; Radium-226; Sample surface; Size; Substrate type; Thorium-228/Thorium-232 activity ratio; Thorium-230; Thorium-232; Visual description; Zinc
    Type: Dataset
    Format: text/tab-separated-values, 298 data points
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  • 6
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    (Tables 2, page 989) Major elements geochemistry and thorium, radium series nuclides activity measurements on surface sediment from the MANOP Site S in the Pacific Ocean (1984)
    PANGAEA
    Details
    Publication Date: 2024-04-16
    Keywords: Alpha spectrometry; Barium; BC; Box corer; Copper; Deposit type; DEPTH, sediment/rock; Description; Event label; Identification; Inductively coupled plasma atomic emission spectroscope (ICP-AES); Inductively coupled plasma - mass spectrometry (ICP-MS); Iron; K7905; K7905-054BC; K7905-062BC; K7905-066BC; K7905-075BC; K7905-091BC; K7905-101BC; K7905-104BC; Knorr; Manganese; MANOP; MANOP Site S, Pacific Ocean; Nickel; NOAA and MMS Marine Minerals Geochemical Database; NOAA-MMS; Radium-226; Thorium-228/Thorium-232 activity ratio; Thorium-230; Thorium-232; Zinc
    Type: Dataset
    Format: text/tab-separated-values, 79 data points
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  • 7
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    (Tables 2, page 989) Major elements geochemistry and thorium, radium series nuclides activity measurements on surface sediment manganese micronodules from the MANOP Site S in the Pacific Ocean (1984)
    PANGAEA
    Details
    Publication Date: 2024-04-16
    Keywords: Alpha spectrometry; BC; Box corer; Copper; Deposit type; DEPTH, sediment/rock; Description; Event label; Identification; Inductively coupled plasma atomic emission spectroscope (ICP-AES); Inductively coupled plasma - mass spectrometry (ICP-MS); Iron; K7905; K7905-054BC; K7905-062BC; K7905-075BC; K7905-101BC; K7905-106BC; Knorr; Manganese; MANOP; MANOP Site S, Pacific Ocean; Nickel; NOAA and MMS Marine Minerals Geochemical Database; NOAA-MMS; Position; Radium-226; Thorium-228/Thorium-232 activity ratio; Thorium-230; Thorium-232; Visual description; Zinc
    Type: Dataset
    Format: text/tab-separated-values, 65 data points
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  • 8
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    (Table 1, page 434-435) Bulk chemical composition of S.W. Pacific island arc Mn-oxide crusts (1984)
    PANGAEA
    In:  Supplement to: Moorby, S A; Cronan, David S; Glasby, Geoffrey P (1984): Geochemistry of hydrothermal Mn-oxide deposits from the S.W. Pacific island arc. Geochimica et Cosmochimica Acta, 48(3), 433-441, https://doi.org/10.1016/0016-7037(84)90272-2
    Details
    Publication Date: 2024-04-16
    Description: Hydrothermal Mn-oxide crusts have been removed from the Tonga-Kermadec Ridge, the first such hydrothermal deposits to be reported in the S.W. Pacific island arc. In several respects the deposits are similar to hydrothermal Mn-crusts from oceanic spreading centre settings. They are limited in areal extent, comprise well-crystalline birnessite and generally display extreme fractionation of Mn from Fe. They are strongly depleted in many elements compared to hydrogenous Mn deposits but are comparatively enriched in Li, Zn, Mo and Cd. The Group IA and Group IIA metals show strong intercorrelations and the behaviour of Mg in the purest samples may indicate the extent to which normal seawater has influenced the composition of the deposits. Certain aspects of the deposits are not typical of hydrothermal Mn deposits. In particular at least some of the crusts have developed on a sediment or unconsolidated talus substrate. Some crusts, or specific layers within some crusts, display a chemical composition which suggests a significant input from normal seawater.
    Keywords: Aluminium; Cadmium; Calcium; Cobalt; Copper; DISTANCE; Dredge; DRG; Event label; Inductively coupled plasma atomic emission spectroscope (ICP-AES); Iron; Latitude of event; Lithium; Longitude of event; Magnesium; Manganese; Molybdenum; Nickel; NOAA and MMS Marine Minerals Geochemical Database; NOAA-MMS; NZOI-1122; Potassium; Sample code/label; Sample comment; Silicon dioxide; Sodium; Strontium; TANG1122-U23; TANG1122-U24; Tangaroa (1960); Titanium; Tonga-Kermadec ridge; Vanadium; Zinc
    Type: Dataset
    Format: text/tab-separated-values, 851 data points
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  • 9
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    Pickfordiateuthis pulchella [Cephalopoda: Myopsida]; range extension to Bonaire (N.A.) (1984)
    In:  Studies on the Fauna of Curaçao and other Caribbean Islands vol. 67 no. 1, pp. 104-106
    Details
    Publication Date: 2024-04-02
    Description: On August 3, 1982 a small squid was collected opposite “Trans World Radio” at Bonaire (Netherlands Antilles). It was kept in a tank for several hours before it died. The species was identified as Pickfordiateuthis pulchella Voss, 1953, hitherto only known from the Florida Keys, U.S.A. According to Voss (1953) it was probably confined to the geographical area represented by the Florida Keys. ABBOTT (1974) mentioned a distribution from southeast Florida to Panama without refering to literature other than Voss (1953). The specimen from Bonaire, a male, differs from the figure of the holotype (a female) mainly in having proportionally shorter tentacles and the posterior end less bluntly tapered. It agrees well with the male paratype, figured by Voss (1953: fig. 3). The measurements of the specimen are: mantle length 16.0 mm, width 6.9 mm and length of head 7.1 mm. The pigmentation of the dorsal side of the head consists of chromatophores, which are larger and darker than those on the ventral side. The pigmentation on the dorsal side of the mantle is less prominent and consists of more diffuse and smaller spots. The ventral side of the mantle is hardly pigmentated with very small dots.
    Repository Name: National Museum of Natural History, Netherlands
    Type: info:eu-repo/semantics/article
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  • 10
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    Notities over Nederlandse zeewieren I (1984)
    In:  Gorteria: tijdschrift voor de floristiek, de plantenoecologie en het vegetatie-onderzoek van Nederland vol. 12 no. 6, pp. 130-135
    Details
    Publication Date: 2024-04-02
    Description: Four species considered to be newly found drifting ashore are described and illustrated: Sargassum natans (L.) Børg., Champia parvula (C. Ag.) Harv., Crouania attenuata (C. Ag.) J. Ag. and Callophyllis laciniata (Huds.) Kütz. In addition some notes are made on new records of Pogotrichum filiforme Reinke, Leathesia difformis (L.) Aresch. and Punctaria latifolia Grev.
    Repository Name: National Museum of Natural History, Netherlands
    Type: info:eu-repo/semantics/article
    Format: application/pdf
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