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catalogue of western australian meteorite collections

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I<br />

J<br />

Mineral Composition<br />

Mol. Ratios % %<br />

·0145 Na20AL2036Si02 .... 7·6 I<br />

·0011 K2OAL20 36Si02 0·6 r 11·5 Feldspar<br />

·0119 CaOAL20 32Si02 3·3 )<br />

·0014 FeO.Ti02 .... 0·2 Ilmenite<br />

·0032 FeO.Cr20 3 .... 0·7 Chromite<br />

·0008 Ca5(P04)3CI 0·4 Apatite<br />

·0216 CaSi03 2·5 I<br />

·0040 MnSi03 0·5 I<br />

·1906 MgSi03 19·1 r 28'7 Pyroxene<br />

·0498 FeSi03 6·6 )<br />

·2023 Mg2Si04 28·5 L<br />

40·1 Olivine<br />

·0570 Fe2Si04 11·6 J<br />

FeS 6'3 Troilite<br />

Fe<br />

9'2 I<br />

Ni .... 1·4 r 10·7 Metal<br />

Co .... 0·05)<br />

H 2O- 0·4<br />

H 20 + 0·6<br />

99·6<br />

Analysed at the British Museum (Natural History) by<br />

Dr. A. A. MQss.<br />

(Plates XIX (a),. XXV (b) and XXVII (a).)<br />

DALGETY DOWNS II<br />

Many fragments, total weight c. 214·1 kg (472 lb.).<br />

This collection: W.A.M. No. 12175, one mass, 4·42 kg (91 lb.) (now cut<br />

into several pieces)..<br />

Other: <strong>collections</strong>: balance (main mass) American Museum <strong>of</strong> Natural<br />

History, New York, and Smithsonian Institution, Washington.<br />

References: none.<br />

Analytical details, etc.: S.G. = 3·50. Olivine Fa24 (Mason). Similar to<br />

Dalgety Downs I but fresher; the parallelism.0f metal specks is again<br />

evident, but no polymict breccia character has. been recognised. Thin<br />

section reveals similar character.<br />

(Plate XIX (b).)<br />

9. DOWERIN Iron<br />

Find, before 1932, south <strong>of</strong> Dowerin township, Western Australia, after<br />

a scrub fire. Latitude 31 0 12' S., longitude 117 0 4' E. Large number <strong>of</strong><br />

small fragments.<br />

32

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