* Astronomy

Blobrana · L

RE: Dyarrl Island meteorite

Blobrana · L

Title: The Barea, Dyarrl Island, and Emery meteorites, and a review of the mesosiderites
Author: BRIAN MASON and E. JAROSEWICH

Barea and Emery are typical mesosiderites, whereas Dyarrl Island ~ is unique in having the lowest metal content and the highest FeO/(FeO-L MgO) ratio of any meteorite of this class. Average pyroxene compositions have been determined for the individual mesosiderites, and show a sequcntial increase in FeSiO3 content, ranging from a mean of 2I mole % for Veramin to 45 mole % for Dyarrl Island. Steinbach may possibly be classed as a mesosiderite, since its mineralogy is identical except for the absence of plagioclase. Dalgaranga and Mt. Padbury may be a paired fall. The chemical and mineralogical composition of the silicate material of the mesosiderites is similar to, but not identical with the howardites; the overall range of composition is greater in the mesosiderites

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Blobrana · L

Mesosiderites are a class of stonyiron meteorites consisting of about equal parts of metallic nickel-iron and silicate. They are breccias with an irregular texture; silicates and metal occur often in lumps or pebbles as well as in fine-grained intergrowths. The silicate part contains olivine, pyroxenes, and Ca-rich feldspar and is similar in composition to eucrites and diogenites.
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Blobrana · L

The Dyarrl Island (L6) meteorite fell in New Ireland, Papua New Guinea, on the 31st January, 1933.
A total mass of 188 g was recovered.

3°S, 151°E