Nitrogen abundances and isotopic compositions in stony meteorites

Details Nitrogen abundances and isotopic compositions in stony meteorites Nitrogen abundances and isotopic compositions in stony meteorites

Feb 1978

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1978e%26psl..38..421k&link_type=abstract

Earth and Planetary Science Letters, vol. 38, no. 2, Feb. 15, 1978, p. 421-435.

Computer Science

42

Abundance, Carbonaceous Chondrites, Meteoritic Composition, Nitrogen Isotopes, Stony Meteorites, Achondrites, Isotope Separation, Mass Ratios, Nebulae, Nitrogen

Scientific paper

Nitrogen contents range from a few parts per million in ordinary chondrites and achondrites to several hundred parts per million in enstatite chondrites and carbonaceous chondrites. Four major isotopic groups are recognized: (1) C1 and C2 carbonaceous chondrites, (2) enstatite chondrites, (3) C3 chondrites, and (4) ordinary chondrites. The major variations are primary, representing isotopic abundances established at the time of condensation and accretion. Secondary processes, such as spallation reactions, solar wind implantation and metamorphic loss may cause small but observable isotopic variations in particular cases. The large isotopic difference between enstatite chondrites and carbonaceous chondrites cannot be accounted for by equilibrium condensation from a homogeneous nebular gas, and requires either unusually large kinetic effects, or a temporal or spatial variation of isotopic composition of the nebula. Nitrogen isotopic heterogeneity in the nebula due to nuclear processes has not been firmly established, but may be required to account for the large variations found within the Allende and Leoville meteorites. The unique carbonaceous chondrite, Renazzo, also requires a special source. It is not yet possible, from the meteoritic data, to establish the mode of accretion of nitrogen onto the primitive earth.

Affiliated with

Also associated with

No associations

Rating

Nitrogen abundances and isotopic compositions in stony meteorites does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.

If you have personal experience with Nitrogen abundances and isotopic compositions in stony meteorites, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Nitrogen abundances and isotopic compositions in stony meteorites will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-1034751