Ureilite Melt Formation.pdf

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Preview of Ureilite Melt Formation
🔗 Source: hou.usra.edu
📊 Size: 426 KB
📄 Pages: 2 pages
⬇️ Downloads: 141

Summary

Feldspathic clasts in polymict ureilites represent two distinct ureilitic melt lithologies, with compositions spanning from albite to anorthite, and are divided into albitic (48%) and labradoritic (27%) populations, with a third calcic population (25%). The albitic clasts have textures and mineral compositions consistent with fractional crystallization trends, while the labradoritic clasts show magnesian pyroxene compositions and a distinct Fe/Mg-Fe/Mn trend. Oxygen isotope compositions suggest the melts originated from ferroan source regions on the ureilite parent body and were reduced by carbon during ascent. The data confirm the albitic lithology as the most abundant feldspathic population and suggest the labradoritic clasts may represent a parental melt or a later fractional melt.

Description

Feldspathic clasts in polymict ureilites represent two distinct ureilitic melt lithologies, with compositions spanning from albite to anorthite, and are...

Technical Information

  • File Format: PDF
  • File Size: 426 KB
  • Pages: 2
  • Language: EN
  • Total Downloads: 141
  • Last Updated: 8 hours ago

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