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    Stratigraphy and evolution of basalts in Mare Humorum and southeastern Procellarum

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    Author
    Hackwill, Terence
    Guest, John
    Spudis, Paul
    Issue Date
    2006-01-01
    Keywords
    Basalt
    impact cratering
    Lunar mare
    
    Metadata
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    Citation
    Hackwill, T., Guest, J., & Spudis, P. (2006). Stratigraphy and evolution of basalts in Mare Humorum and southeastern Procellarum. Meteoritics & Planetary Science, 41(3), 479-488.
    Publisher
    The Meteoritical Society
    Journal
    Meteoritics & Planetary Science
    URI
    http://hdl.handle.net/10150/656117
    DOI
    10.1111/j.1945-5100.2006.tb00475.x
    Additional Links
    https://meteoritical.org/
    Abstract
    We have studied the mare basalts of Mare Humorum and southeastern Procellarum (30 degrees W-50 degrees W, 0 degrees-40 degrees S). One hundred and nine basaltic units have been identified from differences in their FeO wt% and TiO2 wt% content, and variations in crater densities. Crater counting and reference to isotopically dated Apollo samples have provided an age for 33 major units. Some evidence for three distinct periods of volcanic activity has been found. We found that the large unit in the middle of Mare Humorum is the oldest in the basin. This supports the suggestion that the oldest central unit sank causing the lithosphere to bend and create dykes through which lava flowed to produce the outer units. No evidence of a trend in FeO wt% and TiO2 wt% content against time is found within Mare Humorum. There appears to be no lateral trend of basalts in terms of FeO and TiO2 wt% over the entire area with time. An increase in FeO content with time is found in the 33 major units and there is some evidence for an increase in TiO2 in the same units. A correlation between FeO wt% and TiO2 wt% content is evident when all 109 units are compared. A notable feature of this correlation is a sharp increase in gradient of TiO2 wt% content when the FeO wt% content rises above about 17%.
    Type
    Article
    text
    Language
    en
    ISSN
    1945-5100
    ae974a485f413a2113503eed53cd6c53
    10.1111/j.1945-5100.2006.tb00475.x
    Scopus Count
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    Meteoritics & Planetary Science, Volume 41, Number 3 (2006)

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