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  • 2000-2004  (7)
  • 1995-1999  (5)
  • 1990-1994  (11)
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  • 1
    Online Resource
    Online Resource
    Origin and evolution of the Ontong Java Plateau (2004)
    Details Availability
    Keywords: Geology Ontong Java Plateau ; Submarine topography Ontong Java Plateau ; Geology, Stratigraphic Cretaceous ; Aufsatzsammlung ; Ontong-Java-Erhebung ; Entstehung ; Gesteinsbildung ; Meeresgeologie ; Kreide ; Ontong-Java-Erhebung
    Type of Medium: Online Resource
    Pages: 1 Online-Ressource (VI, 374 Seiten)
    ISBN: 1862391572 , 9781862391574
    Series Statement: Geological Society special publication 229
    URL: http://sp.lyellcollection.org/content/229/1
    URL: https://external.dandelon.com/download/attachments/dandelon/ids/DE011D570EE70890E6505C125738A00347398.pdf
    DDC: 551.468
    Language: English
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  • 2
    Electronic Resource
    Electronic Resource
    The geochemistry and petrogenesis of the late-Cretaceous picrites and basalts of Curaçao, Netherlands Antilles: a remnant of an oceanic plateau (1996)
    Springer
    Contributions to mineralogy and petrology 124 (1996), S. 29-43 
    Details
    ISSN: 1432-0967
    Source: Springer Online Journal Archives 1860-2000
    Topics: Geosciences
    Notes: Abstract  The island of Curaçao in the southern Caribbean Sea is composed mainly of a thick sequence (〉5 km) of pillow lavas, grading upwards from picrites at the base of the exposed section, to basalts nearer the top. Modelling suggests that picrites are related to the basalts by fractional crystallisation. Initial radiogenic isotope ratios of the picrites have a restricted compositional range: ɛNd=+6.1 to +6.6, 87Sr/86Sr=0.70296–0.70319; whereas the basalts display a wider range of compositions: ɛNd=+6.6 to +7.6, 87Sr/86Sr=0.70321–0.70671. This variation in isotope ratios between basalts and picrites may be due to the assimilation of altered oceanic crust (or possibly partial melts of such crust) by a picritic magma along with fractional crystallisation. The relatively narrow range of Nd and Pb isotopic compositions in the Curaçao lavas suggests either that the source region was homogeneous, or that melts from a heterogeneous mantle source were well mixed before eruption. Chondritic to slightly light rare earth element enriched patterns, combined with long-term light rare earth element depletion (positive ɛNd), suggest that the lavas were formed by polybaric melting of spinel lherzolite, with small a contribution from garnet lherzolite melts. High-MgO lavas, the absence of a subduction related chemistry, and the chemical similarity to other oceanic plateaux, suggest a mantle plume origin for the Curaçao lava succession. The Curaçao volcanic sequence is part of an oceanic plateau formed at about 88–90 Ma, fragments of which are dispersed around the Caribbean as well as being obducted onto the western margin of Colombia and Ecuador. The occurrence of high-Mg lavas throughout this Cretaceous Caribbean–Colombian igneous province requires anomalously hot mantle (〉200° C hotter than ambient upper mantle) over a large part of a putative plume head, which is inconsistent with some mantle plume models.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/s004100050171
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    Paper (German National Licenses)
    Fulltext
  • 3
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    (Appendix Table 3) Major and trace element concentrations for basalts from the North Atlantic Igneous Province (2000)
    PANGAEA
    Details
    Publication Date: 2023-07-10
    Keywords: AGE; Aluminium oxide; Area/locality; Barium; Caesium; Calcium oxide; Cerium; Chromium; Copper; Dysprosium; Erbium; Europium; Gadolinium; Hafnium; Holmium; Iron oxide, Fe2O3; Lanthanum; LATITUDE; Lead; LONGITUDE; Loss on ignition; Lutetium; Magnesium number; Magnesium oxide; Manganese oxide; Molybdenum; Multi-collector inductively coupled plasma mass spectrometer (MC-ICP-MS); Nickel; Niobium; Phosphorus pentoxide; Potassium oxide; Praseodymium; Rubidium; Samarium; Sample code/label; Scandium; Silicon dioxide; Sodium oxide; Strontium; Tantalum; Terbium; Thorium; Thulium; Titanium dioxide; Uranium; Vanadium; X-ray fluorescence (XRF); Ytterbium; Yttrium; Zinc; Zirconium
    Type: Dataset
    Format: text/tab-separated-values, 898 data points
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  • 4
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    Chemical composition of Ninetyeast Ridge basalts (1991)
    PANGAEA
    In:  Supplement to: Saunders, Andrew D; Storey, Michael; Gibson, Ian L; Leat, Philip; Hergt, Janet M; Thompson, Robert N (1991): Chemical and isotopic constraints of the origin of basalts from Ninetyeast Ridge, Indian Ocean: Results from DSDP Leg 22 and 26 and ODP Leg 121. In: Weissel, J; Peirce, J; Taylor, E; et al. (eds.), Proceedings of the Ocean Drilling Program, Scientific Results, College Station, TX (Ocean Drilling Program), 121, 559-590, https://doi.org/10.2973/odp.proc.sr.121.169.1991
    Details
    Publication Date: 2024-01-09
    Description: On Leg 121 of the Ocean Drilling Program, we recovered basaltic rocks from a total of three basement sites in the southern, central, and northern regions of Ninetyeast Ridge. These new sites complement the previous four basement holes drilled during Legs 22 and 26 of the Deep Sea Drilling Project, and confirm the predominantly tholeiitic, light rare earth element-enriched character of the basalts that cap the ridge. The basalts show marked iron enrichment; ferrobasalts occur at Sites 214 and 216 and oceanic andesites at Site 253. All of the basalts recovered during Leg 121 are altered, and range from aphyric olivine tholeiites (Site 756), to strongly plagioclase-phyric basalts (Site 757). Basalts from Site 758, which were clearly erupted in a submarine environment (pillow basalts are present in the section), are sparsely to strongly plagioclase-phyric. The basalts recovered at any one hole are isotopically homogeneous (except for the basalts from Site 758, which show a range of Pb isotopes), and it is possible to relate the magmas at any one site by high-level fractionation processes. However, there are significant variations in isotope ratios and highly incompatible element ratios between sites, which suggest that the mantle source for the ridge basalts was compositionally variable. Such variation, in view of the large volume of magmatic products that form the ridge system, is not surprising. There is not, however, a systematic variation in basalt composition along the ridge. We agree with previous models that relate Ninetyeast Ridge to a mantle plume in the southern Indian Ocean. The tholeiitic, iron-enriched, and voluminous character of the ridge basalts is typical of oceanic islands associated with plumes on or near a mid-ocean ridge (e.g., Iceland, Galapagos Islands, and St. Paul/Amsterdam islands). The absence of recovered alkalic suites is inconsistent with an intraplate setting, such as the Hawaiian Islands or Kerguelen Island. Thus, the major element data, like the gravity data, strongly suggest that the ridge was erupted on or very close to an active spreading center. Isotopically, the most likely plume that created the excess magmatism on the Ridge is the Kerguelen-Heard plume system, but the Ninetyeast Ridge basalts do not represent a simple mixing of the Kerguelen plume and mid-ocean Ninetyeast Ridge basalt mantle.
    Keywords: 121-756C; 121-756D; 121-757B; 121-757C; 121-758A; 22-214; 22-216; 26-253; Deep Sea Drilling Project; DRILL; Drilling/drill rig; DSDP; Glomar Challenger; Indian Ocean; Indian Ocean//RIDGE; Joides Resolution; Leg121; Leg22; Leg26; Ocean Drilling Program; ODP; South Indian Ridge, South Indian Ocean
    Type: Dataset
    Format: application/zip, 9 datasets
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  • 5
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    Major and trace element analyses of ODP Leg 120 volcanic rocks (Table 1) (1992)
    PANGAEA
    In:  Supplement to: Storey, Michael; Kent, R W; Saunders, Andrew D; Salters, Vincent J M; Hergt, Janet M; Whitechurch, Hubert; Sevigny, James H; Thirlwall, Matthew F; Leat, Philip; Ghose, N C; Gifford, M (1992): Lower Cretaceous volcanic rocks on continental margins and their relationship to the Kerguelen Plateau. In: Wise, SW; Schlich, R; et al. (eds.), Proceedings of the Ocean Drilling Program, Scientific Results, College Station, TX (Ocean Drilling Program), 120, 33-53, https://doi.org/10.2973/odp.proc.sr.120.118.1992
    Details
    Publication Date: 2024-01-09
    Description: Widespread Lower Cretaceous magmatism occurred along the Indian-Australian/Antarctic margins, and in the juvenile Indian Ocean, during the rifting of eastern Gondwana. The formation of this magmatic province probably began around 120-130 Ma with the eruption of basalts on the Naturaliste Plateau and at Bunbury, western Australia. On the northeast margin of India, activity began around 117 Ma with the Rajmahal continental basalts and associated lamprophyre intrusions. The formation of the Kerguelen Plateau in the Indian Ocean began no later than 114 Ma. Ultramafic lamprophyres (alnoites) were emplaced in the Prince Charles Mountains near the Antarctic continental margin at ~ 110 Ma. These events are considered to be related to a major mantle plume, the remnant of which is situated beneath the region of Kerguelen and Heard islands at the present day. Geochemical data are presented for each of these volcanic suites and are indicative of complex interactions between asthenosphere-derived magmas and the continental lithosphere. Kerguelen Plateau basalts have Sr and Nd isotopic compositions lying outside the field for Indian Ocean mid-ocean ridge basalts (MORB) but, with the exception of Site 738 at the southern end of the plateau, within the range of more recent hotspot basalts from Kerguelen and Heard Islands. However, a number of the plateau tholeiites are characterized by lower 206Pb/204Pb ratios than are basalts from Kerguelen Island, and many also have anomalously high La/Nb ratios. These features suggest that the source of the Kerguelen Plateau basalts suffered contamination by components derived from the Gondwana continental lithosphere. An extreme expression of this lithospheric signature is shown by a tholeiite from Site 738, suggesting that the southernmost part of the Kerguelen Plateau may be underlain by continental crust. The Rajmahal tholeiites mostly fall into two distinct geochemical groups. Some Group I tholeiites have Sr and Nd isotopic compositions and incompatible element abundances, similar to Kerguelen Plateau tholeiites from Sites 749 and 750, indicating that the Kerguelen-Heard mantle plume may have directly furnished Rajmahal volcanism. However, their elevated 207Pb/204Pb ratios indicate that these magmas did not totally escape contamination by continental lithosphere. In contrast to the Group I tholeiites, significant contamination is suggested for Group II Rajmahal tholeiites, on the basis of incompatible element abundances and isotopic compositions. The Naturaliste Plateau and the Bunbury Basalt samples show varying degrees of enrichment in incompatible elements over normal MORB. The Naturaliste Plateau samples (and Bunbury Basalt) have high La/Nb ratios, a feature not inconsistent with the notion that the plateau may consist of stretched continental lithosphere, near the ocean-continent divide.
    Keywords: 120-747C; 120-748C; 120-749C; 120-750B; Albite; Aluminium oxide; Anorthite; Apatite; Barium; Calcium oxide; Cerium; Chromium; CIPW Norm; Corundum; Diopside; DRILL; Drilling/drill rig; DSDP/ODP/IODP sample designation; Elements, total; Europium; Event label; Gallium; Hafnium; Hypersthene; Ilmenite; Instrumental neutron activation analysis (INAA) (Reimann et al., 1998); Iron oxide, Fe2O3; Joides Resolution; Lanthanum; Leg120; Loss on ignition; Lutetium; Magnesium oxide; Manganese oxide; Montmorillonite; Neodymium; Nepheline; Nickel; Niobium; Ocean Drilling Program; ODP; Olivine; Orthoclase; Phosphorus pentoxide; Potassium oxide; Quartz; Rubidium; Samarium; Sample code/label; Scandium; Silicon dioxide; Sodium oxide; South Indian Ridge, South Indian Ocean; Strontium; Tantalum; Terbium; Thorium; Titanium dioxide; Tungsten; Vanadium; X-ray fluorescence (XRF); Ytterbium; Yttrium; Zinc; Zirconium
    Type: Dataset
    Format: text/tab-separated-values, 1209 data points
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  • 6
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    (Table 7) Chemical composition of whole rocks from ODP Site 121-757B (1991)
    PANGAEA
    Details
    Publication Date: 2024-01-09
    Keywords: 121-757B; 121-757C; Albite; Aluminium oxide; Anorthite; Apatite; Barium; Calcium oxide; Calculated; Cerium; Chromium; CIPW Norm; Corundum; Diopside; DRILL; Drilling/drill rig; DSDP/ODP/IODP sample designation; Dysprosium; Element analysis, neutron activation (NAA); Elements, total; Erbium; Europium; Event label; Gadolinium; Gallium; Hafnium; Hypersthene; ICP-OES, Inductively coupled plasma - optical emission spectrometry; Ilmenite; Iron/Manganese ratio; Iron oxide, Fe2O3; Iron oxide, FeO; Joides Resolution; Lanthanum; Lanthanum/Tantalum ratio; Lanthanum/Ytterbium ratio; Leg121; Lithologic unit/sequence; Loss on ignition; Lutetium; Magnesium oxide; Magnetite; Manganese oxide; Neodymium; Nepheline; Nickel; Niobium; Ocean Drilling Program; ODP; Olivine; Orthoclase; Phosphorus/Zirconium ratio; Phosphorus pentoxide; Plagioclase; Potassium oxide; Quartz; Rubidium; Samarium; Sample code/label; Sample code/label 2; Scandium; Silicon dioxide; Sodium oxide; South Indian Ridge, South Indian Ocean; Strontium; Tantalum; Terbium; Thorium; Thorium/Tantalum ratio; Titanium/Vanadium ratio; Titanium/Zirconium ratio; Titanium dioxide; Tungsten; Type; Uranium; Vanadium; X-ray fluorescence (XRF); Ytterbium; Yttrium; Zinc; Zirconium; Zirconium/Niobium ratio
    Type: Dataset
    Format: text/tab-separated-values, 1796 data points
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  • 7
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    (Table 12) Whole-rock analyses of interlaboratory samples of ODP Leg 121 (1991)
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    Details
    Publication Date: 2024-01-09
    Keywords: 121-756D; 121-757C; 121-758A; Aluminium oxide; Aluminium oxide, standard deviation; Barium; Barium, standard deviation; Caesium; Calcium oxide; Calcium oxide, standard deviation; Carbon dioxide; Cerium; Cerium, standard deviation; Chromium; Chromium, standard deviation; Cobalt; Copper; DRILL; Drilling/drill rig; DSDP/ODP/IODP sample designation; Dysprosium; Element analysis, neutron activation (NAA); Erbium; Europium; Europium, standard deviation; Event label; Gadolinium; Gallium; Gallium, standard deviation; Hafnium; Hafnium, standard deviation; Hydrogen, gas; ICP-OES, Inductively coupled plasma - optical emission spectrometry; Indian Ocean; Iron oxide, Fe2O3; Iron oxide, FeO, standard deviation; Joides Resolution; Lanthanum; Lanthanum, standard deviation; Leg121; Loss on ignition; Lutetium; Lutetium, standard deviation; Magnesium oxide; Magnesium oxide, standard deviation; Manganese oxide; Manganese oxide, standard deviation; Neodymium; Neodymium, standard deviation; Nickel; Nickel, standard deviation; Niobium; Niobium, standard deviation; Ocean Drilling Program; ODP; Phosphorus pentoxide; Phosphorus pentoxide, standard deviation; Potassium oxide; Potassium oxide, standard deviation; Rubidium; Rubidium, standard deviation; Samarium; Samarium, standard deviation; Sample code/label; Selenium; Selenium, standard deviation; Silicon dioxide; Silicon dioxide, standard deviation; Sodium oxide; Sodium oxide, standard deviation; South Indian Ridge, South Indian Ocean; Strontium; Strontium, standard deviation; Tantalum; Tantalum, standard deviation; Terbium; Terbium, standard deviation; Thorium; Thorium, standard deviation; Titanium dioxide; Titanium dioxide, standard deviation; Tungsten; Uranium; Vanadium; Vanadium, standard deviation; Water in rock; X-ray fluorescence (XRF); Ytterbium; Ytterbium, standard deviation; Yttrium; Yttrium, standard deviation; Zinc; Zinc, standard deviation; Zirconium; Zirconium, standard deviation
    Type: Dataset
    Format: text/tab-separated-values, 860 data points
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  • 8
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    (Table 1) Major and trace element composition of basalts from ODP Leg 163 sites (1999)
    PANGAEA
    Details
    Publication Date: 2024-01-09
    Keywords: 163-988A; 163-989B; 163-990A; Aluminium oxide; Barium; Calcium oxide; Cerium; Chromium; Cobalt; Copper; DEPTH, sediment/rock; DRILL; Drilling/drill rig; DSDP/ODP/IODP sample designation; Elements, total; Europium; Event label; Gadolinium; Gallium; Greenland Sea; Hafnium; Instrumental neutron activation analysis (INAA); Iron oxide, Fe2O3; Iron oxide, FeO; Joides Resolution; Lanthanum; Lead; Leg163; Lithologic unit/sequence; Lutetium; Magnesium oxide; Manganese oxide; Minerals; Neodymium; Nickel; Niobium; Ocean Drilling Program; ODP; Phosphorus pentoxide; Piece; Potassium oxide; Rubidium; Samarium; Sample code/label; Scandium; Silicon dioxide; Sodium oxide; Strontium; Tantalum; Terbium; Thorium; Titanium dioxide; Vanadium; Volatiles; X-ray fluorescence (XRF); Ytterbium; Yttrium; Zinc; Zirconium
    Type: Dataset
    Format: text/tab-separated-values, 212 data points
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  • 9
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    (Table 2) Neodymium, samarium, strontium and lead isotopic ratios of basalts from ODP Leg 163 sites (1999)
    PANGAEA
    Details
    Publication Date: 2024-01-09
    Keywords: 163-988A; 163-989B; 163-990A; Calculated; DEPTH, sediment/rock; DRILL; Drilling/drill rig; DSDP/ODP/IODP sample designation; Event label; Greenland Sea; Joides Resolution; Lead-206/Lead-204 ratio; Lead-207/Lead-204 ratio; Lead-208/Lead-204 ratio; Leg163; Lithologic unit/sequence; Measured; Neodymium; Neodymium-143/Neodymium-144 ratio; Ocean Drilling Program; ODP; Piece; Samarium; Samarium-147/Neodymium-144 ratio; Sample code/label; Strontium-87/Strontium-86 ratio; ε-Neodymium
    Type: Dataset
    Format: text/tab-separated-values, 130 data points
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  • 10
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    (Table 1) Major and trace element composition of basalts from ODP Leg 163 sites and Hole 152-917A (1999)
    PANGAEA
    In:  Supplement to: Larsen, Lotte M; Fitton, J Godfrey; Saunders, Andrew D (1999): Composition of volcanic rocks from the Southeast Greenland margin, Leg 163: major and trace element geochemistry. In: Larsen, HC; Duncan, RA; Allan, JF; Brooks, K (eds.) Proceedings of the Ocean Drilling Program, Scientific Results, College Station, TX (Ocean Drilling Program), 163, 1-13, https://doi.org/10.2973/odp.proc.sr.163.109.1999
    Details
    Publication Date: 2024-01-09
    Description: During Leg 163, in the Southeast Greenland margin, drilling penetrated a thick succession of volcanic rocks that erupted during breakup of the North Atlantic in the early Tertiary. Samples recovered during Leg 163 supplement the samples recovered during Leg 152 from the transect across the volcanic margin at 63°N. During Leg 163, drilling at Site 989 was intended to recover the oldest part of the continental prebreakup series, and drilling at Site 990 was intended to penetrate the transition zone from synbreakup, compositionally variable volcanic products, to postbreakup volcanics with a limited compositional range and a depleted chemical character similar to mid-ocean-ridge basalts (oceanic character). All the lava flows recovered from Sites 989 and 990, however, have an oceanic chemical character with low contents of incompatible elements and high contents of Sc. A dikelet from Site 990 and a previously drilled dike from Site 917 are likewise oceanic. We consider that the two drilled lava flows from Site 989 were emplaced after breakup despite their setting on the innermost part of the continental margin. The succession at Site 990 consists of 13 units of lava flow that show a slight compositional development upsection with Mg# decreasing from ~62 to ~49. This variation is within the limits known from the slightly younger oceanic succession drilled earlier at Site 918, in which the variation is thought to reflect fractionation in magma chambers in the oceanic crust. The reestablishment of magma chambers after the breakup must have been achieved during the interval that the short, undrilled lava succession between uppermost Site 917 and lowermost Site 990 was deposited. All the lava flows from Sites 989 and 990, except perhaps one (Unit 989-1), are crustally contaminated, as judged from their high Ba/Zr (〉0.42) ratios. The two dikes appear to be uncontaminated. The contamination most likely took place in magma chambers in the young oceanic rift, which, at this early stage of spreading, could still have contained fragments of continental crust. Most lavas were probably erupted within the rift and flowed subaerially away from it toward the edge of the continent. The dikes show that lateral injection of magma into the continental crust also took place without resulting in crustal contamination. The oceanic lava flows at Site 989 on the innermost margin have probably been erupted through such laterally injected dikes. The primary magma for the postbreakup rocks is estimated to have contained ~18% MgO. After fractionation of 30 mol% olivine (Fo91-82), it shifted to gabbro fractionation, and the magmas started to erupt. The modal composition of the gabbroic cumulate is 8% olivine (Fo82-74), 50% plagioclase (An76-66), and 42% clinopyroxene (Fs9-15). The erupted oceanic magmas are produced by 〈24 mol% gabbro fractionation, with an average of 14%. Thus, geochemical modeling indicates that the oceanic crust is composed of olivine cumulates (30%), gabbro cumulates (14%), and melts (lava flows and dikes, 56%), which is in accordance with models based on geophysical data.
    Keywords: 152-917A; 163-989A; 163-989B; 163-990A; Aluminium oxide; Atomic absorption spectrometry (AAS); Barium; Calcium oxide; Cerium; Chromium; Cobalt; Copper; DEPTH, sediment/rock; DRILL; Drilling/drill rig; DSDP/ODP/IODP sample designation; Elements, total; Elevation of event; Event label; Gallium; Greenland Sea; Iron oxide, Fe2O3; Iron oxide, FeO; Joides Resolution; Lanthanum; Latitude of event; Lead; Leg152; Leg163; Lithologic unit/sequence; Longitude of event; Magnesium number; Magnesium oxide; Manganese oxide; Neodymium; Nickel; Niobium; Ocean Drilling Program; ODP; Phosphorus pentoxide; Piece; Potassium oxide; Rubidium; Sample code/label; Scandium; Silicon dioxide; Sodium oxide; Strontium; Thorium; Titanium dioxide; Titration; Vanadium; Volatiles; X-ray fluorescence (XRF); Yttrium; Zinc; Zirconium
    Type: Dataset
    Format: text/tab-separated-values, 1222 data points
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