Abstract
Abstract We report a unique, spinel‐rich, extremely porous fine‐grained inclusion in the Kainsaz (CO3) meteorite. This inclusion is the least altered fine‐grained inclusion yet discovered, having escaped almost entirely the secondary alterations experienced by Allende fine‐grained inclusions. The inclusion is comprised of loosely packed 5–30 μm spinel grains mantled by thin layers of melilite, anorthite, and diopsidic pyroxene. The inclusion, which has over 30 vol% void space, is one of the most spinel‐rich, most porous fine‐grained inclusions seen to date. The mineralogy of the inclusion matches that which has been predicted for a precursor of the altered mineral assemblages of Allende fine‐grained inclusions, though a lack of interstitial material in the Kainsaz inclusion reduces the likelihood of a direct genetic relationship between the two (Allende fine‐grained inclusions contain abundant interstitial material). Its mineralogical composition confirms that the precursors of other, more altered, fine‐grained inclusions were assemblages of refractory minerals exclusively.
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
