Measurement of Mn-53 in deep-sea iron and stony spherules

Details Measurement of Mn-53 in deep-sea iron and stony spherules Measurement of Mn-53 in deep-sea iron and stony spherules

May 1983

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1983e%26psl..63..223n&link_type=abstract

Earth and Planetary Science Letters (ISSN 0012-821X), vol. 63, no. 2, May 1983, p. 223-228.

Other

23

Extraterrestrial Matter, Iron Meteorites, Manganese Isotopes, Marine Chemistry, Spherules, Stony Meteorites, Chemical Composition, Cosmic Rays, Neutron Activation Analysis, Ocean Bottom, Pacific Ocean

Scientific paper

Cosmic-ray-produced Mn-53 (half-life, 3.7 x 10 to the 6th yr) is measured in individual and groups of deep-sea iron and stony spherules by highly sensitive neutron activation analysis. The activities found are less than 20 dpm Mn-53/kg Fe (10 to the -5th-10 to the -6th dpm Mn-53/sample) in iron spherules, with the exception of one iron spherule, whose activity is 241 + or - 73 dpm Mn-53/kg Fe. It is believed that these low activities may indicate evaporative loss of Mn-53 caused by heating in the earth's atmosphere. On the other hand, all the stony spherules are found to contain 200-260 dpm Mn-53/kg Fe, which is similar to chondritic values. It is pointed out that these spherules may be ablation debris from large objects.

Affiliated with

Also associated with

No associations

Rating

Measurement of Mn-53 in deep-sea iron and stony spherules 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 Measurement of Mn-53 in deep-sea iron and stony spherules, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Measurement of Mn-53 in deep-sea iron and stony spherules will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-1585691