Highlights Mukundpura- a matrix-rich CM2, fresh fall. Matrix shows evidences of progressive alteration. Iron speciation record is consistent with presence of Cronstedtite.

    Abstract The matrices of CM chondrites are fine-grained and have undergone aqueous alteration. Based on mineral chemical composition of matrix phyllosilicate of Mukundpura CM2, the evidence of progressive aqueous alteration is understood and also reflected in gradual changes in S/SiO2 and FeO/SiO2 ratios. Further, we performed X-ray absorption near-edge spectroscopy at the Fe K-edge to explain the redox state of the phyllosilicate. The Iron Oxidation Index of Mukundpura yields 2.423 and the Fe+3/ Fe+2 ratio is 0.733. The Fe speciation in phyllosilicate is also sensitive to the degree of aqueous activity. Our data are consistent with the presence of Cronstedtite and Tochilinite-Cronstedtite intergrowths in the matrix suggested for different extent of alteration and recorded history of pervasive aqueous alteration in the asteroidal parent body.


    Zugriff

    Zugriff prüfen

    Verfügbarkeit in meiner Bibliothek prüfen

    Bestellung bei Subito €


    Exportieren, teilen und zitieren



    Titel :

    Progressive aqueous alteration and iron oxidation record in the matrix of Mukundpura CM2 chondrite, a new fall


    Beteiligte:
    Ray, D. (Autor:in) / Baliyan, S. (Autor:in) / Nayak, C. (Autor:in)

    Erschienen in:

    Advances in Space Research ; 68 , 8 ; 3233-3241


    Erscheinungsdatum :

    2021-06-03


    Format / Umfang :

    9 pages




    Medientyp :

    Aufsatz (Zeitschrift)


    Format :

    Elektronische Ressource


    Sprache :

    Englisch






    Developing A Carbonaceous Chondrite Based Simulant of Phobos

    Rickman, D. / Patel, M. / Pearson, V. et al. | NTRS | 2016


    Petrograpy of Vigarano Type NWA 5508 Carbonaceous Chondrite

    Kamil, Ceren / Unsalan, Ozan / Candan, Osman | IEEE | 2023