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  • 1995-1999  (16)
  • 1990-1994  (20)
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  • 1
    Online Resource
    Online Resource
    Magnetic Stratigraphy. (1996)
    San Diego :Elsevier Science & Technology,
    Details
    Keywords: Stratigraphic correlation. ; Electronic books.
    Type of Medium: Online Resource
    Pages: 1 online resource (361 pages)
    Edition: 1st ed.
    ISBN: 9780080535722
    Series Statement: Issn Series ; v.Volume 64
    URL: https://ebookcentral.proquest.com/lib/geomar/detail.action?docID=319099
    DDC: 551.7/01
    Language: English
    Note: Cover -- Magnetic Stratigraphy -- Copyright -- Dedication -- Contents -- Preface -- Table Key -- 1 Introduction and History -- 1.1 Introduction -- 1.2 Early Developments -- 1.3 Evidence for Field Reversal -- 2 The Earth's Magnetic Field -- 2.1 Introduction -- 2.2 The Dipole Hypothesis -- 2.3 Models of Field Reversal -- 2.4 Polarity Transition Records and VGP Paths -- 2.5 Statistical Structure of the Geomagnetic Polarity Pattern -- 3 Magnetization Processes and Magnetic Properties of Sediments -- 3.1 Basic Principle -- 3.2 Magnetic Minerals -- 3.3 Magnetization Processes -- 3.4 Magnetic Properties of Marine Sediments -- 3.5 Magnetic Properties of Terrestrial Sediments -- 4 Laboratory Techniques -- 4.1 Introduction -- 4.2 Resolving Magnetization Components -- 4.3 Statistics -- 4.4 Practical Guide to the Identification of Magnetic Minerals -- 5 Fundamentals of Magnetic Stratigraphy -- 5.1 Principles and Definitions -- 5.2 Polarity Zone and Polarity Chron Nomenclature -- 5.3 Field Tests for Timing of Remanence Acquisition -- 5.4 Field Sampling for Magnetic Polarity Stratigraphy -- 5.5 Presentation of Magnetostratigraphic Data -- 5.6 Correlation of Polarity Zones to the GPTS -- 5.7 Quality Criteria for Magnetostratigraphic Data -- 6 The Pliocene-Pleistocene Polarity Record -- 6.1 Early Development of the Plio-Pleistocene GPTS -- 6.2 Subchrons within the Matuyama Chron -- 6.3 Magnetic Stratigraphy in Plio-Pleistocene Sediments -- 6.4 Astrochronologic Calibration of the Plio-Pleistocene GPTS -- 6.5 40Ar/39Ar Age Calibration of the Plio-Pleistocene GPTS -- 7 Late Cretaceous-Cenozoic GPTS -- 7.1 Oceanic Magnetic Anomaly Record -- 7.2 Numerical Age Control -- 8 Paleogene and Miocene Marine Magnetic Stratigraphy -- 8.1 Miocene Magnetic Stratigraphy -- 8.2 Paleogene Magnetic Stratigraphy -- 8.3 Integration of Chemostratigraphy and Magnetic Stratigraphy. , 9 Cenozoic Terrestrial Magnetic Stratigraphy -- 9.1 Introduction -- 9.2 North American Neogene and Quaternary -- 9.3 Eurasian Neogene -- 9.4 African and South American Neogene -- 9.5 North American and Eurasian Paleogene -- 9.6 Mammal Dispersal in the Northern Hemisphere -- 10 Jurassic-Early Cretaceous GPTS -- 10.1 Oceanic Magnetic Anomaly Record -- 10.2 Numerical Age Control -- 10.3 Oxfordian-Aptian Time Scales -- 10.4 Hettangian-Oxfordian Time Scales -- 11 Jurassic and Cretaceous Magnetic Stratigraphy -- 11.1 Cretaceous Magnetic Stratigraphy -- 11.2 Jurassic Magnetic Stratigraphy -- 11.3 Correlation of Late Jurassic-Cretaceous Stage Boundaries to the GPTS -- 12 Triassic and Paleozoic Magnetic Stratigraphy -- 12.1 Introduction -- 12.2 Triassic -- 12.3 Permian -- 12.4 Carboniferous -- 12.5 Pre-Carboniferous -- 12.6 Polarity Bias in the Phanerozoic -- 13 Secular Variation and Brunhes Chron Excursions -- 13.1 Introduction -- 13.2 Sediment Records of Secular Variation -- 13.3 Geomagnetic Excursions in the Brunhes Chron -- 14 Rock Magnetic Stratigraphy and Paleointensities -- 14.1 Introduction -- 14.2 Magnetic Parameters Sensitive to Concentration, Grain Size, and Mineralogy -- 14.3 Rock Magnetic Stratigraphy in Marine Sediments -- 14.4 Rock Magnetic Stratigraphy in Loess Deposits -- 14.5 Rock Magnetic Stratigraphy in Lake Sediments -- 14.6 Future Prospects for Rock Magnetic Stratigraphy -- 14.7 Paleointensity Determinations -- Bibliography -- Index -- International Geophysics Series.
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  • 2
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    Planktonic foraminifera of ODP Hole 107-654A (1990)
    PANGAEA
    In:  Supplement to: Glacon, Georgette; Vergnaud-Grazzini, Colette; Iaccarino, Silvia Maria; Réhault, Jean-Pierre; Randrianasolo, Auran; Sierro, Francisco Javier; Weaver, Philip PE; Channell, James E T; Torii, Masayuki; Hawthorne, Teresa B (1990): Planktonic foraminiferal events and stable isotope records in the Upper Miocene, Site 654. In: Kastens, KA; Mascle, J; et al. (eds.), Proceedings of the Ocean Drilling Program, Scientific Results, College Station, TX (Ocean Drilling Program), 107, 415-427, https://doi.org/10.2973/odp.proc.sr.107.157.1990
    Details
    Publication Date: 2024-01-09
    Description: The late Miocene sediments of the Tyrrhenian ODP Site 654 encompass a deepening sequence which begins with glauconite shallow water sands followed by a rapid transition to deep water sediments and culminates with dolomitic mudstones associated with Messinian evaporites. The sequence compares well with the so-called 'Sahelian cycle' and with post-orogenic cycles recognized in peninsular Italy and Sicily. The studied interval, consisting of 55 m thick nannofossil oozes, belongs to the Globorotalia suterae subzone and lower part of the Globorotalia conomiozea Zone, indicating late Tortonian and early Messinian age, respectively. Biomagnetostratigraphic correlation assigns the Tortonian/ Messinian boundary an age of 6.44-6.45 Ma. In addition, six main events have been recognized, based on the range of keeled globorotaliids and coiling direction changes of keeled and unkeeled globorotaliids, which have been correlated to the geomagnetic time-scale. Comparison with North Atlantic sites and land sections of the Guadalquivir basin and northern Morocco provides good correlations with the events documented in these areas. In particular, Event IV, which predates the FO of Globorotalia conomiozea, may be used to recognize the Tortonian/Messinian boundary in extra-Mediterranean areas where G. conomiozea is missing. Variations in the distribution of different species of Globigerinoides are related to changes in the surficial marine environment. Although no clear trends can be recognized on the oxygen and carbon isotope records of Globigerinoides obliquus, the parallelism between the occurrence of low salinity species (G. sacculifer) and peaks of low 5180 values, as well as that of normal salinity species (G. obliquus) and peaks of high d18O values, suggests strong local changes of environmental conditions. The high amplitude of the fluctuations of d18O values suggests important variations in the salinity of the Tyrrhenian Sea, related to a rapidly changing water budget. The major feature of the carbon isotope record is a large decrease between 7.0 and 6.95 Ma, which therefore predates the 6.2 Ma global 'carbon shift'.
    Keywords: 107-654A; DRILL; Drilling/drill rig; Joides Resolution; Leg107; Ocean Drilling Program; ODP; Tirreno Sea
    Type: Dataset
    Format: application/zip, 3 datasets
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    DATA PANGAEA
  • 3
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    Magnetostratigraphy of ODP Leg 107 holes (1990)
    PANGAEA
    In:  Supplement to: Channell, James E T; Torii, Masayuki; Hawthorne, Teresa B (1990): Magnetostratigraphy of sediments recovered at sites 650, 651, 652 and 654 (Leg 107 in the Tyrrhenian Sea). In: Kastens, KA; Mascle, J; et al. (eds.), Proceedings of the Ocean Drilling Program, Scientific Results, College Station, TX (Ocean Drilling Program), 107, 335-346, https://doi.org/10.2973/odp.proc.sr.107.167.1990
    Details
    Publication Date: 2024-01-09
    Description: Apart from Site 650, core disturbance due to rotary drilling severely compromised the quality of the magnetostratigraphic data obtained from Leg 107 sediments. The correlation of polarity zones to the geomagnetic polarity time scale cannot be made solely on the basis of pattern fit. The proposed correlations are consistent between sites, and this consistency is constrained by the biostratigraphic datums. The resulting biomagnetostratigraphic correlations are reviewed in the synthesis section of this volume. The purpose of this paper is to document the magnetic stratigraphies, and present the preferred correlation to the geomagnetic reversal time scale. Four implications of the proposed correlations are: (1) The Mio-Pliocene boundary occurs in the lowest reversed interval of the Gilbert (Chron 3r) at about 4.9 Ma. (2) The thick pre-Pliocene lacustrine sequence recovered at Site 652 appears to have been deposited entirely within a single reversed polarity chron (Chron 3r). (3) The balatino-type gypsum recovered at Site 654 was also deposited entirely within this polarity chron (Chron 3r). (4) The Tortonian-Messinian boundary occurs within a normal polarity zone which is probably correlative to Chron 6 (Chron 3B) giving a boundary age of about 6.4 Ma.
    Keywords: 107-650A; 107-651A; 107-652A; 107-654A; DRILL; Drilling/drill rig; Joides Resolution; Leg107; Ocean Drilling Program; ODP; Tirreno Sea
    Type: Dataset
    Format: application/zip, 4 datasets
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    DATA PANGAEA
  • 4
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    Chemistry of peridotites from ODP Hole 107-651A (1990)
    PANGAEA
    In:  Supplement to: Bonatti, Enrico; Seyler, Monique; Channell, James E T; Giraudeau, Jacques; Mascle, Georges (1990): Peridotites drilled from the Tyrrhenian Sea, ODP Leg 107. In: Kastens, KA; Mascle, J; et al. (eds.), Proceedings of the Ocean Drilling Program, Scientific Results, College Station, TX (Ocean Drilling Program), 107, 37-47, https://doi.org/10.2973/odp.proc.sr.107.141.1990
    Details
    Publication Date: 2024-01-09
    Description: Hole 651 A, drilled during ODP leg 107 in the Tyrrhenian Sea, bottomed in a 30-m-thick section of serpentinized peridotite. Site 651 was drilled on the eastern flank of a north-south trending basement high located along the axis of the Vavilov basin. Peridotite is overlain by a 136-m-thick basement section consisting of two distinct basalt units separated by a dolerite-albitite intrusive unit. Peridotite has a tectonitic texture and probably derived from the upper mantle; it was affected by a complex history of ductile and brittle deformation. High temperature (〉700°C) hydrous metasomatism, which probably occurred at upper mantle levels and produced tschermakitic and Mg-hornblende, tremolite, and possibly chlorite, affected the peridotite. Lower temperature metamorphic events followed, which gave rise to talcquartz ± chlorite assemblages and to serpentinization. A relict primary assemblage consists of olivine, variable amounts of orthopyroxene, and spinel, implying that the rocks were originally harzburgite and dunite. Both bulk rock and relict primary mineral chemistry suggest that the peridotite is highly depleted, and chemically distinct from mantlederived peridotites from circum-Tyrrhenian ophiolites (North Apennine, Corsica), from passive margins and from the ocean basins. ODP Site 651 peridotite appears to have affinity with modern (Mariana, Tonga, and Puerto Rico Trenches) and ophiolitic (Troodos, Vourinos) arc-subduction related peridotites. It may represent a refractory upper mantle sliver which was affected by island arc/subduction systems inferred to have migrated southeast from Sardinia during the opening of the Tyrrhenian Sea.
    Keywords: 107-651A; DRILL; Drilling/drill rig; Joides Resolution; Leg107; Ocean Drilling Program; ODP; Tirreno Sea
    Type: Dataset
    Format: application/zip, 6 datasets
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    DATA PANGAEA
  • 5
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    Magnetic properties and paleomagnetism of basalts from ODP Leg 107 basalts (1990)
    PANGAEA
    In:  Supplement to: Vigliotti, Luigi; Torii, Masayuki; Channell, James E T (1990): Magnetic properties and paleomagnetism of basalts from Leg 107 (Holes 651A and 655B). In: Kastens, KA; Mascle, J; et al. (eds.), Proceedings of the Ocean Drilling Program, Scientific Results, College Station, TX (Ocean Drilling Program), 107, 99-110, https://doi.org/10.2973/odp.proc.sr.107.165.1990
    Details
    Publication Date: 2024-01-09
    Description: The basalts recovered at Holes 651A and 655B appear to carry a single component remanent magnetization, which is generally of reversed polarity. These magnetizations are consistent with eruption during the Matuyama (651A) and Gilbert (655B) polarity epochs. The blocking temperature spectra and the Js/T curves indicate that titanomaghemite is the principal remanence carrier. The lower mean destructive field (MDF) and higher susceptibility at 651A probably indicates a lower mean oxidation state at this hole relative to 655B, which may simply reflect the age difference between the two basalt sequences. At both holes, a decreasing downcore trend both in natural remanent magnetization (NRM) and susceptibility probably indicates that maghemitization (from primary titanomagnetite) increases downcore. An interval of high coercivity at hole 655B (119.80-151.45 mbsf) appears to define a magnetically distinct unit within the basalt sequence.
    Keywords: 107-651A; 107-655B; DRILL; Drilling/drill rig; Joides Resolution; Leg107; Ocean Drilling Program; ODP; Tirreno Sea
    Type: Dataset
    Format: application/zip, 2 datasets
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    DATA PANGAEA
  • 6
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    Biostratigraphic events close to the Tortonian-Messinian boundary at ODP Hole 107-654A (Table 1) (1990)
    PANGAEA
    In:  Supplement to: Channell, James E T; Rio, Domenico; Sprovieri, Rodolfo; Glacon, Georgette (1990): Biomagnetostratigraphic correlations from Leg 107 in the Tyrrhenian Sea. In: Kastens, KA; Mascle, J; et al. (eds.), Proceedings of the Ocean Drilling Program, Scientific Results, College Station, TX (Ocean Drilling Program), 107, 669-682, https://doi.org/10.2973/odp.proc.sr.107.180.1990
    Details
    Publication Date: 2024-01-09
    Description: Correlations of biostratigraphic datums to the geomagnetic reversal time scale (GRTS) at Leg 107 sites provide a means of correlating these datums to sections outside the Mediterranean. Unfortunately, poor recovery and core deformation due to rotary drilling at Sites 651, 652, and 654 severely hampered efforts to acquire detailed magnetostratigraphies and biostratigraphies. However, many biostratigraphic markers could be correlated to the GRTS, including those close to the Miocene/Pliocene and Tortonian/Messinian boundaries. These boundaries are interpreted to occur in Chrons 3r and 3B, respectively (chron nomenclature after Cox, 1982). Comparison of the correlation of Plio-Pleistocene calcareous plankton biostratigraphic events to the GRTS in the Mediterranean and in the open oceans indicates that many events are broadly synchronous between the two environments. The outstanding exception is the first occurrence of Globorotalia margaritae which is delayed in the Mediterranean by about 1 m.y.
    Keywords: 107-654A; Age model; Ageprofile Datum Description; Depth, bottom/max; DEPTH, sediment/rock; Depth, top/min; DRILL; Drilling/drill rig; DSDP/ODP/IODP sample designation; Joides Resolution; Leg107; Ocean Drilling Program; ODP; Sample code/label; Sample code/label 2; Tirreno Sea
    Type: Dataset
    Format: text/tab-separated-values, 42 data points
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    DATA PANGAEA
  • 7
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    (Appendix B) Splice tie points for ODP Site 162-907 sediments (1999)
    PANGAEA
    Details
    Publication Date: 2024-01-09
    Keywords: 162-907; COMPCORE; Composite Core; Depth, composite; Depth, reference; DEPTH, sediment/rock; DSDP/ODP/IODP sample designation; Iceland Sea; Joides Resolution; Leg162; Ocean Drilling Program; ODP; Sample code/label; Tie point
    Type: Dataset
    Format: text/tab-separated-values, 260 data points
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    DATA PANGAEA
  • 8
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    (Table 1) Polarity chron boundaries at ODP Site 162-986 sediments (1999)
    PANGAEA
    Details
    Publication Date: 2024-01-09
    Keywords: 162-986C; 162-986D; Age model; Chronozone; Depth, composite; DEPTH, sediment/rock; DRILL; Drilling/drill rig; Event label; Joides Resolution; Leg162; North Greenland Sea; Ocean Drilling Program; ODP
    Type: Dataset
    Format: text/tab-separated-values, 15 data points
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  • 9
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    (Table 2) Polarity chron boundaries at ODP Site 162-987 sediments (1999)
    PANGAEA
    Details
    Publication Date: 2024-01-09
    Keywords: 162-987A; 162-987B; 162-987D; 162-987E; Age model; Chronozone; Comment; Depth, composite; Depth, reference; DEPTH, sediment/rock; DRILL; Drilling/drill rig; Event label; Iceland Sea; Joides Resolution; Leg162; Ocean Drilling Program; ODP
    Type: Dataset
    Format: text/tab-separated-values, 186 data points
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    DATA PANGAEA
  • 10
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    (Table 1) Polarity chron boundaries at ODP Leg 162 holes (1999)
    PANGAEA
    Details
    Publication Date: 2024-01-09
    Keywords: 162-980A; 162-980B; 162-980C; 162-981A; 162-981B; 162-982A; 162-982B; 162-982C; 162-983A; 162-983B; 162-983C; 162-984A; 162-984B; 162-984C; 162-984D; Age model; Chronozone; Depth, composite; DEPTH, sediment/rock; DRILL; Drilling/drill rig; Elevation of event; Event label; Joides Resolution; Latitude of event; Leg162; Longitude of event; Ocean Drilling Program; ODP; Sample comment; South Atlantic Ocean
    Type: Dataset
    Format: text/tab-separated-values, 313 data points
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    DATA PANGAEA
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