Molecular and isotopic analyses of Tagish Lake alkyl dicarboxylic acids

Re-Os isotopic systematics and platinum group element composition of the Tagish Lake carbonaceous chondrite

The Tagish Lake meteorite is a primitive C2 chondrite that has undergone aqueous alteration shortly after formation of its parent body. Previous work indicates that if this type of material was part of a late veneer during terrestrial planetary accretion, it could provide a link between atmophile elements such as H, C, N and noble gases, and highly siderophile element replenishment in the bulk ...

The Osmium Isotopic Composition of Tagish Lake and Other Chondrites, Implications for Late Terrestrial Planetary Accretion

Introduction: The prevailing models for terrestrial planet origin and differentiation call upon magma oceans generally concurrent with core formation very early during differentiation. Tungsten isotope measurements of Earth and Mars materials are consistent with core formation occurring in terrestrial planets within 30 m.y. or less after the onset of condensation of the solar system [1-4]. In s...

Noble Gases in Tagish Lake

Introduction: Tagish Lake has been classified as a CI2 chondrite [1] with an interstellar grain abundance enhanced over that of CI1 and CM2 chondrites [2]. Noble gases have been used as markers for the presence of exotic, presolar grains in chondritic meteorites: Xe-HL (nanodiamonds) and Xe-s/Ne-E (SiC). We have measured He, Ne, Ar and Xe in whole-rock Tagish Lake, and an orthophosphoric acidre...

Hydrogen Isotopic Composition of the Tagish Lake Meteorite: Comparison with Other Carbonaceous

Lithologically-dependent Bulk Isotopic Variations of Insoluble Organic Matter in the Tagish Lake Meteorite

Introduction: The Tagish Lake meteorite is an ungrouped carbonaceous chondrite that contains a high amount of organic carbon (up to 2.6 wt%), most of which is insoluble in polar solvents [1]. Lithologically, the Tagish Lake meteorite is anything but homogeneous. Aside from the carbonate-rich and carbonate-poor lithologies described by [2], there exist matrix-rich and matrix poor lithologies as ...