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JMDMT #1473 Microfossils of Cyanobacteria in Carbonaceous Meteorites

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Author: h4ck3rm1k3

Tags: Carbonaceous Cyanobacteria Fossils Life Meteorite

The James M. DuPont Meteorite Collection - Goalpara (ureilite). A small fraction of each sample was subjected to pulse heating, for 10 seconds, at 800 degrees C and 1500 degrees C, and then analyzed for C content and stable isotopic composition using stepped combustion-static mass...

JMDMT #1461 Microfossils of Cyanobacteria in Carbonaceous Meteorites

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Author: h4ck3rm1k3

Tags: Carbonaceous Cyanobacteria Fossils Life Meteorite

The James M. DuPont Meteorite Collection - to be no consistent trends in the data. The N isotopes, on the other hand, exhibit large variations (delta15N = -47 per mil to 257 per mil). Most of the meteorites exhibit somewhat similar characteristics in their N isotope release profiles,...

JMDMT #1460 Microfossils of Cyanobacteria in Carbonaceous Meteorites

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Author: h4ck3rm1k3

Tags: Carbonaceous Cyanobacteria Fossils Life Meteorite

The James M. DuPont Meteorite Collection - 385. Alexander C. M. O'D.* Arden J. W. Ash R. D. Grady M. M. Russell S. S. Pillinger C. T. The C and N Isotopic Compositions of Insoluble Organic Matter in Chondrites Hydrogen, C and N in organic material exhibit a wide range of isotopic...

JMDMT #1413 Microfossils of Cyanobacteria in Carbonaceous Meteorites

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Author: h4ck3rm1k3

Tags: Carbonaceous Cyanobacteria Fossils Life Meteorite

The James M. DuPont Meteorite Collection - and a HF/HCl resistant residue have been analyzed for N and noble gases. After an initial 400 degrees C combustion in 2 torr O2 to remove surface contamination, stepwise pyrolysis is employed for gas extraction and N and noble gases have been...

JMDMT #1383 Microfossils of Cyanobacteria in Carbonaceous Meteorites

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Author: h4ck3rm1k3

Tags: Carbonaceous Cyanobacteria Fossils Life Meteorite

The James M. DuPont Meteorite Collection - conversion to CO in the high temperature, O-rich nebular expected for spinel growth would appear to have been unavoidable. Furthermore, with the advent of meticulously temporally and thermally controlled stepped combustion extractions of acid...

JMDMT #1381 Microfossils of Cyanobacteria in Carbonaceous Meteorites

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Author: h4ck3rm1k3

Tags: Carbonaceous Cyanobacteria Fossils Life Meteorite

The James M. DuPont Meteorite Collection - spinel with H3PO4 in a similar fashion. Due to spinel chemistry a voluminous precipitate was produced by this treatment, but stepped combustion of this residue showed that the C persisted at low temperature and little had been removed by the...

JMDMT #1379 Microfossils of Cyanobacteria in Carbonaceous Meteorites

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Author: h4ck3rm1k3

Tags: Carbonaceous Cyanobacteria Fossils Life Meteorite

The James M. DuPont Meteorite Collection - resistant residue which had been density separated with bromoform and spinel removed by H3PO4. C-Theta was equated with so called "anti-heavy C", a high temperature phenomenon observed in some early stepped combustions of acid resistant...

JMDMT #1378 Microfossils of Cyanobacteria in Carbonaceous Meteorites

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Author: h4ck3rm1k3

Tags: Carbonaceous Cyanobacteria Fossils Life Meteorite

The James M. DuPont Meteorite Collection - after the application of the manifold harsh chemical treatments which were used to isolate specimens of diamonds from various meteorites. References: [1] Verchovsky A. B. and Pillinger C. T. (1996) LPS XXVII, 1361-1362. [2] Verchovsky A. B. et...