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Nd- and Sr- isotope ratios of oceanic basalts (1977)

O'Nions, R K ; Hamilton, P J ; Evensen, N M

PANGAEA

In: Supplement to: O'Nions, R K; Hamilton, P J; Evensen, N M (1977): Variations in 143Nd/144Nd and 87Sr/86Sr ratios in oceanic basalts. Earth and Planetary Science Letters, 34(1), 13-22, https://doi.org/10.1016/0012-821X(77)90100-5

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Publication Date: 2024-05-15

Description: 143Nd/144Nd ratios have been determined on 37 samples of oceanic basalt, with a typical precision of +/- 2-3 * 10**-5 (2 sigma). Ocean island and dredged and cored submarine basalts are included for which reliable measurements of 87Sr/86Sr ratios exist in the literature or have been measured as part of this study. A strong negative correlation exists between 143Nd/144Nd and 87Sr/86Sr ratios in basalts from Iceland and the Reykjanes Ridge, but such a clear correlation does not exist for samples from the Hawaiian Islands. However, when other ocean island basalts from the Atlantic are included there is an overall correlation between these two parameters. Increases and decreases in Rb/Sr in oceanic basalt source regions have in general been accompanied by decreases and increases respectively in Sm/Nd ratios. The compatibility of the data with single-stage models is assessed and it is concluded that enrichment and depletion events, which are consistent with transfer of silicate melts, are responsible for the observed variation.

Keywords: 37-332A; 37-332B; Deep Sea Drilling Project; DRILL; Drilling/drill rig; DSDP; Glomar Challenger; Leg37; North Atlantic/VALLEY

Type: Dataset

Format: application/zip, 3 datasets

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Composition of chromian diopside megacryst in DSDP Leg 37 basalts (Table 2, 3) (1977)

Donaldson, Colin H ; Brown, Roy W

PANGAEA

In: Supplement to: Donaldson, Colin H; Brown, Roy W (1977): Refractory megacrysts and magnesium-rich melt inclusions within spinel in oceanic tholeiits: indicators of magma mixing and parental magma composition. Earth and Planetary Science Letters, 37(1), 81-89, https://doi.org/10.1016/0012-821X(77)90148-0

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Publication Date: 2024-05-15

Description: Refractory megacrysts of olivine, plagioclase, chromian diopside and Cr-Al spinel, which were not in equilibrium with the host oceanic tholeiite on eruption, are present in samples from several dredge sites and DSDP drill sites in the Atlantic and Pacific Oceans. They have multiple origins: (1) cognate or accidental mantle fragments; (2) relict fragments from fractional crystallization of parental liquids considerably more primitive than oceanic tholeiite; and most commonly (3) the fractional crystallization products of such liquids mixed with oceanic tholeiite magma. Melt inclusions in chrome-spinel phenocrysts provide evidence for this postulated Mg- and Ca-rich magma which has counterparts in the Scottish Tertiary Province and in west Greenland.

Keywords: 37-332A; 37-332B; 37-335; Aluminium oxide; Calcium oxide; Chromium; Chromium(III) oxide; Deep Sea Drilling Project; DRILL; Drilling/drill rig; DSDP; DSDP/ODP/IODP sample designation; Elevation of event; Enstatite; Event label; Ferrosilite; Glomar Challenger; Iron oxide, Fe2O3; Iron oxide, FeO; Latitude of event; Leg37; Lithology/composition/facies; Longitude of event; Magnesium number; Magnesium oxide; Manganese oxide; North Atlantic; North Atlantic/VALLEY; Potassium oxide; Sample code/label; Silicon dioxide; Sodium oxide; Titanium dioxide; Wollastonite

Type: Dataset

Format: text/tab-separated-values, 46 data points

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(Table XIV-1, Page 137-139) Physical characteristics of manganese nodules collected in the Pacific Ocean during cruise GH76-1 of R/V Hakurei Maru (1977)

Moritani, Tomoyuki ; Maruyama, Shuji ; Nohara, Masato ; [et al.]

PANGAEA

In: Supplement to: Moritani, Tomoyuki; Maruyama, Shuji; Nohara, M; Matsumoto, K; Ogitsu, T; Moriwaki, H (1977): Description, classification and distribution of manganese nodules. In: Mizuno, A (Ed) Deep sea mineral resources investigation in the central-eastern part of the central Pacific Basin, January-March, 1976 (GH76-1 Cruise), Geological Survey of Japan, Cruise Report, 136-158, https://www.gsj.jp/data/cruise-rep/08-14.pdf

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Publication Date: 2024-05-15

Description: Nodule samples obtained were described and studied on board for 1) observation of occurrence and morphology in and outside samplers, size classification, measurement of weight and calculation of population density (kg/m2); 2) photographing whole nodules on the plate marked with the frames of unit areas of both 0cean-70 (0.50 m2) and freefall grab (0.13 m2), and that of typical samples on the plate with a 5 cm grid scale: 3) observation of internal structures of the nodules on cut section; and 4) determination of mineral composition by X-ray diffractometer. The relation between nodule types and geological environment or chemical composition was examined by referring to other data of related studies, such as sedimentology. acoustic survey, and chemical analysis.

Keywords: Calculated from mass/volume; Density; DEPTH, sediment/rock; Dredge, box; DRG_B; Event label; FFGR; Figure; Free-fall grab; GH76-1; GH76-1-C6; GH76-1-C7; GH76-1-C8(N); GH76-1-D137(N); GH76-1-FG10-2; GH76-1-FG1-2; GH76-1-FG12-1; GH76-1-FG12-2; GH76-1-FG15-1; GH76-1-FG15-2; GH76-1-FG16-1; GH76-1-FG16-2; GH76-1-FG17-1; GH76-1-FG17-2; GH76-1-FG19-1; GH76-1-FG19-2; GH76-1-FG20-2; GH76-1-FG21-1; GH76-1-FG21-2; GH76-1-FG22-1; GH76-1-FG22-2; GH76-1-FG23-1; GH76-1-FG25-1; GH76-1-FG25-2; GH76-1-FG27-1; GH76-1-FG27-2; GH76-1-FG28-1; GH76-1-FG28-2; GH76-1-FG29-1; GH76-1-FG29-2; GH76-1-FG30-1; GH76-1-FG30-2; GH76-1-FG31-1; GH76-1-FG31-2; GH76-1-FG32-1; GH76-1-FG32-2; GH76-1-FG32-3; GH76-1-FG32-4; GH76-1-FG32-5; GH76-1-FG32-6; GH76-1-FG32-7; GH76-1-FG32-8; GH76-1-FG4-2; GH76-1-FG5-1; GH76-1-FG5-2; GH76-1-FG6-1; GH76-1-FG6-2; GH76-1-FG7-1; GH76-1-FG7-2; GH76-1-FG8-1; GH76-1-FG8-2; GH76-1-FG9-1; GH76-1-FG9-2; GH76-1-G169; GH76-1-G171; GH76-1-G172; GH76-1-G173; GH76-1-G174; GH76-1-G175; GH76-1-G176; GH76-1-G181; GH76-1-G182; GH76-1-G183; GH76-1-G184; GH76-1-G185-1; GH76-1-G186; GH76-1-G187; GH76-1-G188; GH76-1-G189; GH76-1-G190; GH76-1-G191; GH76-1-G193; GH76-1-G194; GH76-1-G195; GH76-1-G196; GH76-1-P67; GH76-1-P72; GH76-1-P73; Hakurei-Maru (1974); Identification; Mass, netto; NOAA and MMS Marine Minerals Geochemical Database; NOAA-MMS; Nodules, mass abundance; O70; Ocean 70 grab; Pacific Ocean; PC; Photo/Video; Piston corer; PV; Shape; Specimen count; Station 403; Station 405; Station 406; Station 406A; Station 407; Station 407A; Station 407A-2; Station 408; Station 408A; Station 408A-1; Station 409; Station 410; Station 411; Station 412; Station 414; Station 414A; Station 414A-1; Station 414A-2; Station 414A-3; Station 417; Station 418; Station 419; Station 420; Station 421; Station 422; Station 423; Station 424; Station 425; Station 426; Station 427; Station 429; Station 430; Station 431; Station 432; Station 433

Type: Dataset

Format: text/tab-separated-values, 637 data points

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Annotated record of the detailed examination of Mn deposits from DSDP Leg 37 (Holes 332B, 334) (1977)

Aumento, Fabrizio ; Melson, William G ; Robinson, Paul T

PANGAEA

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Publication Date: 2024-05-15

Description: DSDP Leg 337 was planned as an attemp at deep penetration of the igneous section of the oceanic crust on the western flank of the FAMOUS (Franco- American Mid-Ocean Undersea Study) area of the Mid-Atlantic Ridge at 36°N. Site 332 is located in Deep Drill Valley approximately 30 km west of the axis of the Mid-Atlantic Ridge at 36°52'N latitude. The principal goal at this site was deep penetration into layer 2 of the ocean crust by multiple re-entry. Site 334 was drilled on a steep east-facing slope in a small, deep basin near the middle of magnetic anomaly 5. In this area, breccias with gabbro and peridotite clasts in a nannofossil-foram ooze matrix are interlayered with the plutonic rocks and may reflect exposure of a melange in or near the Median Valley of the Mid- Atlantic Ridge prior to burial by later basaltic extrusions.

Keywords: 37-332B; 37-334; Comment; Deep Sea Drilling Project; Deposit type; DEPTH, sediment/rock; Description; DRILL; Drilling/drill rig; DSDP; Event label; Glomar Challenger; Identification; Leg37; NOAA and MMS Marine Minerals Geochemical Database; NOAA-MMS; North Atlantic/BASIN; North Atlantic/VALLEY; Position; Quantity of deposit; Sample code/label; Sediment type; Substrate type; Visual description

Type: Dataset

Format: text/tab-separated-values, 18 data points

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(Table 3) Sr and Nd-isotope ratios of oceanic basalts from DSDP Site 37-332 (1977)

O'Nions, R K ; Hamilton, P J ; Evensen, N M

PANGAEA

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Publication Date: 2024-05-15

Keywords: -; 37-332A; 37-332B; Calculated; Deep Sea Drilling Project; DRILL; Drilling/drill rig; DSDP; DSDP/ODP/IODP sample designation; Event label; Glomar Challenger; Isotope ratio mass spectrometry; Leg37; Neodymium-143/Neodymium-144 ratio; Neodymium-143/Neodymium-144 ratio, error; North Atlantic/VALLEY; Samarium-147/Neodymium-144 ratio; Sample code/label; Strontium-87/Strontium-86 ratio; Strontium-87/Strontium-86 ratio, error

Type: Dataset

Format: text/tab-separated-values, 36 data points

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Drilling in a high temperature and overpressured area Sunda Straits, Indonesia (1977)

Noujaim, Alfred K.

IPA

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Publication Date: 2024-05-08

Description: The Aminoil Group drilled a 10,000 ft - well a few kilometers off the Krakatau volcano in 1973. The well bottomed in Pliocene sediments after penetrating a more than 8,000 ft thick Upper Pliocene section of mainly claystones with interbedded sand-, siltstones and pyroclastics. On the basis of temperature surveys and BHT's measured during logging, a static formation temperature in excess of 450° F was extrapolated for the bottom of the hole. Tue high temperatures caused some deterioration in the mud properties, but otherwise no serious drilling problems. Owing to overpressures a high salinity oil mud and controlled drilling had to be employed. The well was P&A because no economic hydrocarbon accumulations could be expected in the high temperature regimes.

Type: Conference or Workshop Item , PeerReviewed

Format: text

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