Origin and evolution of prebiotic organic matter as inferred from the Tagish Lake meteorite.
نویسندگان
چکیده
The complex suite of organic materials in carbonaceous chondrite meteorites probably originally formed in the interstellar medium and/or the solar protoplanetary disk, but was subsequently modified in the meteorites' asteroidal parent bodies. The mechanisms of formation and modification are still very poorly understood. We carried out a systematic study of variations in the mineralogy, petrology, and soluble and insoluble organic matter in distinct fragments of the Tagish Lake meteorite. The variations correlate with indicators of parent body aqueous alteration. At least some molecules of prebiotic importance formed during the alteration.
منابع مشابه
The Tagish Lake meteorite: a possible sample from a D-type asteroid.
A new type of carbonaceous chondrite, the Tagish Lake meteorite, exhibits a reflectance spectrum similar to spectra observed from the D-type asteroids, which are relatively abundant in the outer solar system beyond the main asteroid belt and have been inferred to be more primitive than any known meteorite. Until the Tagish Lake fall, these asteroids had no analog in the meteorite collections. T...
متن کاملThe organic content of the Tagish Lake meteorite.
The Tagish Lake meteorite fell last year on a frozen lake in Canada and may provide the most pristine material of its kind. Analyses have now shown this carbonaceous chondrite to contain a suite of soluble organic compounds (approximately 100 parts per million) that includes mono- and dicarboxylic acids, dicarboximides, pyridine carboxylic acids, a sulfonic acid, and both aliphatic and aromatic...
متن کاملLithologically-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 ...
متن کاملIn-situ Heating Decrease Kinetics of Aliphatic Hydrocarbons in Tagish Lake Meteorite by Micro-ftir
Introduction: Carbonaceous chondrites are known to contain up to 3wt.% C, the major part of which corresponds to a macromolecular organic fraction [1]. Chondritic organic matter is based on small aromatic units, cross-linked by short aliphatic chains rather than large clusters of polyaromatic structures [2]. Two main characteristic features of those organics measured by FTIR are (1) an equivale...
متن کامل19.10 N&V mx
but only rarely is a new type of meteorite discovered. Last week in Science, Brown et al. described what might be such an event with the orbit, fall and recovery of numerous fragments of a meteorite in the Canadian Yukon. Named after the frozen lake on which it fell, the Tagish Lake meteorite is a chondrite, which means it is a stony aggregate of matter from the early Solar System. It is descri...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
برای دانلود متن کامل این مقاله و بیش از 32 میلیون مقاله دیگر ابتدا ثبت نام کنید
ثبت ناماگر عضو سایت هستید لطفا وارد حساب کاربری خود شوید
ورودعنوان ژورنال:
- Science
دوره 332 6035 شماره
صفحات -
تاریخ انتشار 2011