“Dogged” Search of Fresh Nakhla Surfaces Reveals New Alteration Textures

Special Issue: 74th Annual Meeting of the Meteoritical Society, August 8-12, 2011, London, U.K.International audienceCarbonaceous chondrites are considered as amongst the most primitive Solar System samples available. One of their primitive characteristics is their enrichment in volatile elements.This includes hydrogen, which is present in hydrated and hydroxylated minerals. More precisely, the mineralogy is expected to be dominated by phyllosilicates in the case of CM chondrites, and by Montmorillonite type clays in the case of CI. Here, in order to characterize and quantify the abundance of lowtemperature minerals in carbonaceous chondrites, we performed thermogravimetric analysis of matrix fragments of Tagish Lake, Murchison and Orgueil

Compartiendo el misterio: la experiencia de un terapeuta con la psicoterapia de los constructos personales

This paper discusses the therapist's experience in experiential personal construct psychotherapy. First, the nature of ROLE relationships is developed based upon Kelly's Sociality Corollary. The theoretical foundations of experiential personal construct psychotherapy then are elaborated by combining the Sociality and Choice Corollaries. The theoretical concept of optimal therapeutic distance, along with the concepts of "therapeutic" strangers and "therapeutic" unity, are discussed in terms of their implications for the experience of therapist and client in psychotherapy. The paper concludes with a discussion of the validation and invalidation of therapist constructions as well as the implications of Experiential Personal Construct Psychotherapy for the personal growth of the therapist.En este artículo se considera la experiencia del terapeuta en la Psicoterapia Experiencial de los Constructos Personales. En primer lugar se desarrolla la naturaleza de las relaciones de ROL de acuerdo con el corolario de Socialidad de Kelly. Se elaboran después los fundamentos teóricos de la Psicoterapia Experiencial de los Constructos Personales en base a la combinación de los corolarios de Socialidad y de Elección. Se discuten igualmente los conceptos de distancia terapéutica óptima, a través de los conceptos de "extrañamiento terapéutico" y de "unidad terapéutica" en términos de sus implicaciones para la experiencia del terapeuta y cliente en psicoterapia. El trabajo concluye con una discusión sobre la validación e invalidación de las construcciones del terapeuta, al igual que sobre las implicaciones de la Psicoterapia Experiencial de los Constructos Personales para el crecimiento personal del terapeuta