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  • 1
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    High shear strain of olivine aggregates: rheological and seismic consequences (2000)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 2000-11-25
    Description: High-pressure and high-temperature torsion experiments on olivine aggregates in dislocation creep show about 15 to 20% strain weakening before steady-state behavior, characterized by subgrain-rotation recrystallization and a strong lattice preferred orientation. Such weakening may provide a way to focus flow in the upper mantle without a change in deformation mechanism. Flow laws derived from low strain data may not be appropriate for use in modeling high strain regions. In such areas, seismic wave propagation will be anisotropic with an axis of approximate rotational symmetry about the shear direction. In contrast to current thinking, the anisotropy will not indicate the orientation of the shear plane in highly strained, recrystallized olivine-rich rocks.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Bystricky, M -- Kunze, K -- Burlini, L -- Burg, J -- New York, N.Y. -- Science. 2000 Nov 24;290(5496):1564-7.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Geologisches Institut, ETH-Zentrum, 8092 Zurich, Switzerland. misha@erdw.ethz.ch〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/11090352" target="_blank"〉PubMed〈/a〉
    Print ISSN: 0036-8075
    Electronic ISSN: 1095-9203
    Topics: Biology , Chemistry and Pharmacology , Computer Science , Medicine , Natural Sciences in General , Physics
    Published by American Association for the Advancement of Science (AAAS)
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  • 2
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    Accumulation of D-aspartic acid with age in the human brain (1983)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1983-06-24
    Description: An age-related accumulation of D-aspartic acid was detected in the white matter of ten normal brains from individuals aged 30 to 80 years. Gray matter showed no systematic increase in D-aspartic acid. The rate constant for D-aspartate formation in the brain is equal to the predicted value calculated for 37 degrees C. Accumulation of the uncommon D-aspartate isomer in myelinated white matter implies that there is little or no turnover of this tissue, and this may have a bearing on dysfunction of the aging brain or on other diseases of myelin.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Man, E H -- Sandhouse, M E -- Burg, J -- Fisher, G H -- New York, N.Y. -- Science. 1983 Jun 24;220(4604):1407-8.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/6857259" target="_blank"〉PubMed〈/a〉
    Keywords: Adult ; Aged ; *Aging ; Aspartic Acid/*analysis/physiology ; *Brain Chemistry ; Eye Proteins/analysis ; Humans ; Lens Nucleus, Crystalline/analysis ; Middle Aged
    Print ISSN: 0036-8075
    Electronic ISSN: 1095-9203
    Topics: Biology , Chemistry and Pharmacology , Computer Science , Medicine , Natural Sciences in General , Physics
    Published by American Association for the Advancement of Science (AAAS)
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  • 3
    Electronic Resource
    Electronic Resource
    Structure and evolution of the Himalaya–Tibet orogenic belt (1984)
    [s.l.] : Nature Publishing Group
    Nature 307 (1984), S. 17-22 
    Details
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] The 1981 French–Chinese expedition to Tibet focused on the Lhasa block, extending earlier coverage 400 km north of the Tsangpo suture. The Lhasa block stood between 10 and 15° N latitude over most of the Upper Cretaceous and Eocene and, if Gondwanian in origin, had detached from Gondwana ...
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1038/307017a0
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    Paper (German National Licenses)
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  • 4
    Electronic Resource
    Electronic Resource
    The Tibetan side of the India–Eurasia collision (1981)
    [s.l.] : Nature Publishing Group
    Nature 294 (1981), S. 405-410 
    Details
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] Results are reported from the 1980 joint French–Chinese field expedition in Tibet. The area covered was from the High Himalaya in the south, to the region of Nagqu ∼250 km north of Yangbajain. Ophiolites in the Zangbo valley represent remnants of the crust of an ocean basin which lay ...
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1038/294405a0
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  • 5
    Electronic Resource
    Electronic Resource
    Tectonics and structural zonation of southern Tibet, China (1984)
    [s.l.] : Nature Publishing Group
    Nature 311 (1984), S. 219-223 
    Details
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] The Yarlung Zangbo suture zone is composed of several thrust sheets with distinct stratigraphies, states of deformation and metamorphic grades. Successive deformations have been produced by persistent north–south shortening since obduction of the ophiolites by late Cretaceous–Palaeocene ...
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1038/311219a0
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  • 6
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    Polyphase evolution of Pelagonia (northern Greece) revealed by geological and fission-track data (2014)
    Copernicus
    Details
    Publication Date: 2014-11-10
    Description: The Pelagonian zone, between the External Hellenides/Cyclades to the west and the Axios/Vardar/Almopia zone (AVAZ) and Rhodope to the east, was involved in late Early Cretaceous and in Late Cretaceous-Eocene orogenic events whose duration are still controversial. This work constrains their late thermal imprints. New and previously published zircon (ZFT) and apatite (AFT) fission-track ages show cooling below 240°C of the metamorphic western AVAZ imbricates between 102 and 93–90 Ma, of northern Pelagonia between 86 and 68 Ma, of the eastern AVAZ at 80 Ma and of western Rhodope at 72 Ma. At the regional scale, this heterogeneous cooling is coeval with subsidence of Late Cretaceous marine basin(s) that unconformably covered since 100 Ma the Early Cretaceous (130–110 Ma) thrust system. Thrusting restarted at 70 Ma in the AVAZ and migrated across Pelagonia to reach the External Hellenides at 40–38 Ma. Renewed thrusting in Pelagonia is attested at 68 Ma by abrupt and rapid cooling below 240°C and erosion of the basement rocks. ZFT and AFT in western and eastern Pelagonia, respectively, set at 40 Ma the latest thermal imprint related to thrusting. Central-eastern Pelagonia cooled rapidly and uniformly from 240 to 80°C between 24 and 16 Ma in the footwall of a major extensional fault. Extension started even earlier, at 33 Ma in the western AVAZ. Post-7 Ma rapid cooling is inferred from inverse modeling of AFT lengths. It occurred while E–W normal faults were cutting Pliocene-to-recent sediment.
    Electronic ISSN: 1869-9537
    Topics: Geosciences
    Published by Copernicus on behalf of European Geosciences Union.
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  • 7
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    Polyphase evolution of Pelagonia (northern Greece) revealed by geological and fission-track data (2015)
    Copernicus
    Details
    Publication Date: 2015-02-25
    Description: The Pelagonian zone, situated between the External Hellenides/Cyclades to the west and the Axios/Vardar/Almopias zone (AVAZ) and the Rhodope to the east, was involved in late Early Cretaceous and in Late Cretaceous–Eocene orogenic events whose duration and extent are still controversial. This paper constrains their late thermal imprints. New and previously published zircon (ZFT) and apatite (AFT) fission-track ages show cooling below 240 °C of the metamorphic western AVAZ imbricates between 102 and 93–90 Ma, of northern Pelagonia between 86 and 68 Ma, of the eastern AVAZ at 80 Ma and of the western Rhodope at 72 Ma. At the regional scale, this heterogeneous cooling is coeval with subsidence of Late Cretaceous marine basin(s) that unconformably covered the Early Cretaceous (130–110 Ma) thrust system from 100 Ma. Thrusting resumed at 70 Ma in the AVAZ and migrated across Pelagonia to reach the External Hellenides at 40–38 Ma. Renewed thrusting in Pelagonia is attested at 68 Ma by abrupt and rapid cooling below 240 °C and erosion of the gneissic rocks. ZFT and AFT in western and eastern Pelagonia, respectively, testify at ~40 Ma to the latest thermal imprint related to thrusting. Central-eastern Pelagonia cooled rapidly and uniformly from 240 to 80 °C between 24 and 16 Ma in the footwall of a major extensional fault. Extension started even earlier, at ~33 Ma in the western AVAZ. Post-7 Ma rapid cooling is inferred from inverse modeling of AFT lengths. It occurred while E–W normal faults were cutting Pliocene-to-recent sediment.
    Print ISSN: 1869-9510
    Electronic ISSN: 1869-9529
    Topics: Geosciences
    Published by Copernicus on behalf of European Geosciences Union.
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