• 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

    Along-strike diachroneity in deposition of the Kailas Formation in central southern Tibet: Implications for Indian slab dynamics

    • CSV
    • RefMan
    • EndNote
    • BibTex
    • RefWorks
    Thumbnail
    Name:
    Leary_Geosphere_Revised.pdf
    Size:
    4.507Mb
    Format:
    PDF
    Description:
    Final Accepted Manuscript + ...
    Download
    Author
    Leary, Ryan
    Orme, Devon A.
    Laskowski, Andrew K.
    DeCelles, Peter G. cc
    Kapp, Paul cc
    Carrapa, Barbara
    Dettinger, Matt
    Affiliation
    Department of Geosciences, University of Arizona
    Issue Date
    2016-08
    
    Metadata
    Show full item record
    Publisher
    Geological Society of America
    Citation
    Along-strike diachroneity in deposition of the Kailas Formation in central southern Tibet: Implications for Indian slab dynamics 2016, 12 (4):1198 Geosphere
    Journal
    Geosphere
    Rights
    © 2016 Geological Society of America.
    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 Oligo-Miocene Kailas Formation is exposed along strike for ~1,300 km within the southernmost Lhasa terrane. In this study, we document the sedimentology, structure, and age of this unit exposed between 87˚ and 90˚ E. Within this region, the Kailas Formation is composed of continental deposits dominated by conglomerate and sandstone, with lesser volumes of siltstone and paleosols. These rocks were deposited nonconformably on Gangdese Batholith and related volcanic rocks along their northern boundary, whereas to the south, the south-dipping Great Counter Thrust places them in contact with Xigaze Forearc and mélange units. We interpret the Kailas Formation to have been deposited in alluvial fan and fluvial environments with sediment principally derived from the north. Based on sedimentology and structural relationships, we interpret these rocks to have formed in a north-south extensional setting. New zircon U-Pb ages from volcanic tuffs and flows show that Kailas Formation deposition younged to the east: deposition in western Tibet (81˚E) occurred between 26-24 Ma, 25-23 Ma north of Lazi (87.8˚E), 23-22 Ma near Dazhuka (89.8˚E), and as late as 18 Ma southwest of Lhasa (92˚E). Overall, basin development propagated eastward at a rate of ~300 mm/yr. This pattern and rate of propagation are similar to that of the temporal-spatial distribution of adakitic and ultrapotassic magmatism within the Lhasa terrane to the north, which has been interpreted as a record of slab breakoff. Magmatism lags several million years behind Kailas basin development at most locations. We interpret the Kailas basin to have formed as the result of Indian slab shearing and breakoff, which began in western Tibet around 26 Ma and reached eastern Tibet by ~18 Ma.
    Note
    12 month embargo; First Published on July 08, 2016
    ISSN
    1553-040X
    1553-040X
    DOI
    10.1130/GES01325.1
    Version
    Final accepted manuscript
    Additional Links
    http://geosphere.gsapubs.org/lookup/doi/10.1130/GES01325.1
    ae974a485f413a2113503eed53cd6c53
    10.1130/GES01325.1
    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.