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  • Other Sources  (2)
  • 1975-1979  (2)
  • 1950-1954
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  • 1
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    Unknown
    Petrogenetic relationship between Allan Hills 77005 and other achondrites (1979)
    In:  Other Sources
    Details
    Publication Date: 2019-06-28
    Description: The paper presents chemical and petrologic data relating the Allan Hills (ALHA) 77005 achondrite from Antarctica and explores their petrogenetic relationship with the shergottites. Petrologic similarities with the latter in terms of mineralogy, oxidation state, inferred source region composition, and shock ages suggest a genetic relationship, also indicated by volatile to involatile element ratios and abundances of other trace elements. ALHA 77005 may be a cumulate crystallized from a liquid parental to materials from which the shergottites crystallized or a sample of peridotite from which shergottite parent liquids were derived. Chemical similarities with terrestrial ultramafic rocks suggest that it provides an additional sample of the only other solar system body with basalt source origins chemically similar to the upper earth mantle.
    Keywords: GEOSCIENCES (GENERAL)
    Type: Earth and Planetary Science Letters; 45; 2; Nov. 197
    Format: text
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    NASA TECHNICAL REPORTS
  • 2
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    Trace element contents of selected antarctic meteorites, 1 (1979)
    In:  CASI
    Details
    Publication Date: 2019-06-27
    Description: Data are reported for volatile/mobile Ag, As, Au, Bi, Cd, Co, Cs, Cu, Ga, In, Rb, Sb, Se, Te, T1 and Zn in exterior and/or interior samples of four Antarctic meteorites: 77005 (unique achondrite); 77257 (unreilite); 77278 (L3); 77299 (H3). Exterior samples reflect contamination and/or leaching by weathering but trace element (ppm-ppt) contents in interior samples seem reasonable for representatives of these rare meteoritic types. The 77005 achondrite seems related to shergottites; other samples extend compositional ranges previously known for their types. With suitable precautions, Antarctic meteorite finds yield trace element data as reliable as those obtained from previously known falls.
    Keywords: LUNAR AND PLANETARY EXPLORATION
    Type: NASA-CR-158583
    Format: application/pdf
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    NASA TECHNICAL REPORTS
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