Isotopic anomaly in peat nitrogen is a probable trace of acid rains caused by 1908 Tunguska bolide

Details Isotopic anomaly in peat nitrogen is a probable trace of acid rains caused by 1908 Tunguska bolide Isotopic anomaly in peat nitrogen is a probable trace of acid rains caused by 1908 Tunguska bolide

Feb 1998

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1998p%26ss...46..163k&link_type=abstract

Planetary and Space Science, v. 46, p. 163-167.

Physics

8

Scientific paper

In peat sampled at the Tunguska Cosmic Body (TCB) explosion area, the sharp increase of the N concentration (about three-fold) and the positive N isotopic anomaly (δ15N = +3.5‰, see eqn) have for the first time been revealed. In contrast with the C and H effects observed earlier which were clearly limited to the epicentre area, the same N effect has also been shown in peat sampled near the Vanavara settlement, 65 km south of the explosion epicentre. A clear connection of the observed anomalies in peat to the 1908 permafrost boundary, synchronism of the changes of δ15N and the N concentration and also good agreement with data on the K/T boundary deposits allow us to connect the observed effects to acid rain fall-out after passage and an explosion of the TCB.

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