Editing Pyroxenite (section)

==Pyroxenite lavas==
Purely pyroxene-bearing volcanic rocks are rare, restricted to [[Triodia (plant)|spinifex]]-textured [[Sill (geology)|sill]]s, [[lava tube]]s and thick flows in the [[Archean|Archaean]] [[greenstone belt]]s. Here, the pyroxenite lavas are created by in-situ crystallisation and accumulation of pyroxene at the base of a lava flow, creating the distinctive spinifex texture, but also occasionally mesocumulate and orthocumulate segregations. This is in essence similar to the formation of olivine spinifex textures in [[komatiite]] lava flows, the chemistry of the magma differing only to favor crystallisation of  pyroxene.

A type locality is the [[Gullewa Greenstone Belt]], in the [[Murchison (Western Australia)|Murchison]] region of [[Western Australia]], and the Duketon Belt near [[Laverton, Western Australia|Laverton]], where pyroxene spinifex lavas are closely associated with gold deposits.