• Login
    View Item 
    •   Home
    • UA Faculty Research
    • UA Faculty Publications
    • View Item
    •   Home
    • UA Faculty Research
    • UA Faculty Publications
    • View Item
    JavaScript is disabled for your browser. Some features of this site may not work without it.

    Browse

    All of UA Campus RepositoryCommunitiesTitleAuthorsIssue DateSubmit DateSubjectsPublisherJournalThis CollectionTitleAuthorsIssue DateSubmit DateSubjectsPublisherJournal

    My Account

    LoginRegister

    About

    AboutUA Faculty PublicationsUA DissertationsUA Master's ThesesUA Honors ThesesUA PressUA YearbooksUA CatalogsUA Libraries

    Statistics

    Most Popular ItemsStatistics by CountryMost Popular Authors

    Remagnetization of carbonate rocks in southern Tibet: Perspectives from rock magnetic and petrographic investigations

    • CSV
    • RefMan
    • EndNote
    • BibTex
    • RefWorks
    Thumbnail
    Name:
    Huang_et_al-2017-Journal_of_Ge ...
    Size:
    8.076Mb
    Format:
    PDF
    Description:
    FInal Published Version
    Download
    Author
    Huang, Wentao cc
    Lippert, Peter C. cc
    Zhang, Yang cc
    Jackson, Michael J. cc
    Dekkers, Mark J. cc
    Li, Juan
    Hu, Xiumian
    Zhang, Bo
    Guo, Zhaojie cc
    van Hinsbergen, Douwe J. J. cc
    Affiliation
    Univ Arizona, Dept Geosci
    Issue Date
    2017-04
    Keywords
    Jurassic to Paleogene
    carbonate rocks
    volcaniclastic rocks
    Tibetan Himalaya
    remagnetization
    
    Metadata
    Show full item record
    Publisher
    AMER GEOPHYSICAL UNION
    Citation
    Remagnetization of carbonate rocks in southern Tibet: Perspectives from rock magnetic and petrographic investigations 2017, 122 (4):2434 Journal of Geophysical Research: Solid Earth
    Journal
    Journal of Geophysical Research: Solid Earth
    Rights
    © 2017. American Geophysical Union. All Rights Reserved.
    Collection Information
    This item from the UA Faculty Publications collection is made available by the University of Arizona with support from the University of Arizona Libraries. If you have questions, please contact us at repository@u.library.arizona.edu.
    Abstract
    The latitudinal motion of the Tibetan Himalayathe northernmost continental unit of the Indian plateis a key component in testing paleogeographic reconstructions of the Indian plate before the India-Asia collision. Paleomagnetic studies of sedimentary rocks (mostly carbonate rocks) from the Tibetan Himalaya are complicated by potentially pervasive yet cryptic remagnetization. Although traditional paleomagnetic field tests reveal some of this remagnetization, secondary remanence acquired prior to folding or tilting easily escapes detection. Here we describe comprehensive rock magnetic and petrographic investigations of Jurassic to Paleocene carbonate and volcaniclastic rocks from Tibetan Himalayan strata (Tingri and Gamba areas). These units have been the focus of several key paleomagnetic studies for Greater Indian paleogeography. Our results reveal that while the dominant magnetic carrier in both carbonate and volcaniclastic rocks is magnetite, their magnetic and petrographic characteristics are distinctly different. Carbonate rocks have wasp-waisted hysteresis loops, suppressed Verwey transitions, extremely fine grain sizes (superparamagnetic), and strong frequency-dependent magnetic susceptibility. Volcaniclastic rocks exhibit pot-bellied hysteresis loops and distinct Verwey transitions. Electron microscopy reveals that magnetite grains in carbonate rocks are pseudomorphs of early diagenetic pyrite, whereas detrital magnetite is abundant and pyrite is rarely oxidized in the volcaniclastic rocks. We suggest that the volcaniclastic rocks retain a primary remanence, but oxidation of early diagenetic iron sulfide to fine-grained magnetite has likely caused widespread chemical remagnetization of the carbonate units. We recommend that thorough rock magnetic and petrographic investigations are prerequisites for paleomagnetic studies throughout southern Tibet and everywhere in general.
    Note
    6 month embargo; First published: 12 April 2017
    ISSN
    21699313
    DOI
    10.1002/2017JB013987
    Version
    Final published version
    Sponsors
    Netherlands Organization for Scientific Research (NWO) with a Rubicon grant [825.15.016]; Institute for Rock Magnetism (IRM) at the University of Minnesota; Instruments and Facilities program of NSF; ERC Starting Grant [306810]; NWO VIDI [864.11.004]
    Additional Links
    http://doi.wiley.com/10.1002/2017JB013987
    ae974a485f413a2113503eed53cd6c53
    10.1002/2017JB013987
    Scopus Count
    Collections
    UA Faculty Publications

    entitlement

     
    The University of Arizona Libraries | 1510 E. University Blvd. | Tucson, AZ 85721-0055
    Tel 520-621-6442 | repository@u.library.arizona.edu
    DSpace software copyright © 2002-2017  DuraSpace
    Quick Guide | Contact Us | Send Feedback
    Open Repository is a service operated by 
    Atmire NV
     

    Export search results

    The export option will allow you to export the current search results of the entered query to a file. Different formats are available for download. To export the items, click on the button corresponding with the preferred download format.

    By default, clicking on the export buttons will result in a download of the allowed maximum amount of items.

    To select a subset of the search results, click "Selective Export" button and make a selection of the items you want to export. The amount of items that can be exported at once is similarly restricted as the full export.

    After making a selection, click one of the export format buttons. The amount of items that will be exported is indicated in the bubble next to export format.