Introduction to Meteorite Mineralogy

Mineralogy, Petrology, Chronology, and Exposure History of the Chelyabinsk Meteorite and Parent Body

METEORITE AND PARENT BODY. K. Righter1, P. Abell1, D. Agresti2, E. L. Berger3, A.S. Burton1, J.S. Delaney4, M.D. Fries1, E.K. Gibson1, R. Harrington5, G. F. Herzog4, L.P. Keller1, D. Locke6, F. Lindsay4, T.J. McCoy7, R.V. Morris1, K. Nagao8, K. Nakamura-Messenger1, P.B. Niles1, L. Nyquist1, J. Park4, Z.X. Peng9, C.Y.Shih10, J.I. Simon1, C.C. Swisher, III4, M. Tappa11, and B. Turrin4. 1NASA-JSC,...

Mineralogy. Discovery of bridgmanite, the most abundant mineral in Earth, in a shocked meteorite.

Meteorites exposed to high pressures and temperatures during impact-induced shock often contain minerals whose occurrence and stability normally confine them to the deeper portions of Earth's mantle. One exception has been MgSiO3 in the perovskite structure, which is the most abundant solid phase in Earth. Here we report the discovery of this important phase as a mineral in the Tenham L6 chondr...

Thermal Decomposition of Siderite–pyrite Assemblages: Implications for Sulfide Mineralogy in Martian Meteorite Alh84001 Carbonate Globules:

Introduction: Although magnetite crystals in ALH84001 have received considerable attention in the literature as a potential biomarker, the sulfide component is important because the coexistence of magnetite and sulfides has also been suggested as a marker for past biogenic activity [1]. Very little research, however, has focused on the formation of sulfides in ALH84001. Early research on the su...

Testing variations within the Tagish Lake meteorite—I: Mineralogy and petrology of pristine samples

Four samples (TL5b, TL11h, TL11i, and TL11v) from the pristine collection of the Tagish Lake meteorite, an ungrouped C2 chondrite, were studied to characterize and understand its alteration history using EPMA, XRD, and TEM. We determined that samples TL11h and TL11i have a relatively smaller proportion of amorphous silicate material than sample TL5b, which experienced low-temperature hydrous pa...

An Introduction to Sociolinguistics