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An unusual occurrence of ultramafic and mafic rocks north of Mt Bischoff, Tasmania

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posted on 2023-11-02, 05:42 authored by PR Williams, AV Brown
Plagioclase-bearing harzburgite, plagioclase lherzolite, basalt and dolerite intrude a sequence of mudstone, greywacke, pillowed basalt and chert in the Arthur River valley north of Mt Bischoff. The ultramafic rocks are concordant bodies characterised by absence of internal deformation structures, abundant primary mineral assemblages and cumulate textures. The ultramafics were most probably intruded as magma. Fine- to coarse-grained dolerite were intruded in the same zone, probably as dykes.

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Publication title

Papers & Proceedings of the Royal Society of Tasmania

Volume

117

Pagination

53-58

ISSN

0080-4703

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Copyright Royal Society of Tasmania.

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