Clinopyroxene thermobarometry

Compositional diagram of pyroxenes. Diopside, hedenbergite and augite are main sub-minerals of clinopyroxene. Jadeite contains aluminium and is therefore not shown in the diagram.

In petrology the mineral clinopyroxene is used for temperature and pressure calculations of the magma that produced igneous rock containing this mineral. Clinopyroxene thermobarometry is one of several geothermobarometers. Two things makes this method especially useful; first, clinopyroxene is a common phenocryst in igneous rocks easy to identify, second, the crystallization of the jadeite component of clinopyroxene implies a growth in molar volume being thus a good indicator of pressure.

The minerals and liquids involved in clinopyroxene thermobarometry are:

• Augite - (Ca,Mg,Fe)SiO₃
• Diopside - MgCaSi₂O₆
• Hedenbergite - CaFeSi₂0₆
• Jadeite - Na(Al,Fe³⁺)Si₂O₆

References

• Putirka, Keith; Johnson, Marie; Kinzler, Rosamond; Longhi, John and Walker, David. Thermobarometry of mafic igneous rocks based on clinopyroxene-liquid equilibria, 0-30 kbar. Mineral Petrology 1996.

This article related to petrology is a stub. You can help Wikipedia by expanding it.v · Categories: Geochemistry Igneous rocks Petrology stubs Wikimedia Foundation. 2010. Игры ⚽ Поможем написать курсовую Clinoporus biporosus Clinosperma bractealis Look at other dictionaries: Pyroxene — Figure 1: A sample of pyroxenite, a rock consisting mostly of pyroxene minerals. The pyroxenes are a group of important rock forming inosilicate minerals found in many igneous and metamorphic rocks. They share a common structure consisting of… …   Wikipedia Jadeite — This article is about the mineral. For other uses, see Jadeite (disambiguation). Jadeite Jadeite General Category …   Wikipedia Ultra-high-temperature metamorphism — (UHT) represents extreme crustal metamorphism with metamorphic temperatures exceeding 900 °C (Harley, 1998 Geol. Soc. Lond; Brown, 2007 Int. Geol. Rev.; Kelsey, 2008 Gondwana Res.; Santosh and Omori, 2008a Gondwana Res.). Granulite facies rocks… …   Wikipedia 18+ © Academic, 2000-2024 Contact us: Technical Support, Advertising Dictionaries export, created on PHP, Joomla, Drupal, WordPress, MODx. Mark and share Search through all dictionaries Translate… Search Internet Share the article and excerpts Direct link … Do a right-click on the link above and select “Copy Link”