[meteorite-list] Glass Bombs

From: Bernd Pauli HD <bernd.pauli_at_meteoritecentral.com>
Date: Thu Apr 22 09:43:33 2004
Message-ID: <3B5C7768.40F4492A_at_lehrer1.rz.uni-karlsruhe.de>

William Russell wrote:

> I do not know how it is different from other impact glass.


Hello again,

Here is some more info on the chemical composition of diamond-
bearing glass bombs from Aumühle and Seelbronn culled from:

SIEBENSCHOCK M. et al. (1998) Impact diamonds in glass bombs from
suevite of the Ries Crater, Germany (Meteoritics 33-4, 1998, A145):

wt% Au-G (core) Au-G (rim) SIE-9781 SIE-9721 ZI-G1

SiO2 65.70 65.80 65.30 64.20 64.10
TiO2 0.80 0.79 0.82 0.73 0.68
Al2O3 16.90 16.80 16.90 14.80 14.70
Fe2O3 2.46 2.45 2.51 4.99 4.74
MnO 0.05 0.05 0.03 0.10 0.10
MgO 0.73 0.78 0.56 2.63 2.44
CaO 3.83 3.74 4.29 4.08 4.11
Na2O 3.25 3.24 3.46 3.06 3.17
K2O 3.22 3.11 3.02 2.75 2.67
P2O5 0.34 0.35 0.58 0.27 0.24
L.O.I. 1.90 2.00 1.60 1.80 2.20

Total 99.18 99.11 99.07 99.41 99.15
Received on Mon 23 Jul 2001 03:13:44 PM PDT