Dissolution of orthopyroxene in basanitic magma between 0.4 and 2 GPa: further implications for the origin of Si-rich alkaline glass inclusions in mantle xenoliths

Article Abstract:

Equilibrium dissolution experiments between 0.4 and 2 GPa were conducted to determine the possibility that Si-Al-rich alkaline glass inclusions may have also originated from the dissolution of orthopyroxene in basanitic or Si-poor alkaline melt. Complex reaction zones consisting of olivine, clinopyroxene and Si-rich alkaline glass that have the same composition as that seen in mantle xenoliths were observed. Results also suggested that the formation of Si-rich alkaline glass pools by the orthopyroxene/melt reaction is a common process during the formation of xenoliths.

Magma, Alkalic igneous rocks

---

Mechanisms of orthopyroxene dissolution in silica-undersaturated melts at 1 atmosphere and implications for the origin of silica-rich glass in mantle xenoliths

Article Abstract:

A study investigated the structure of melts derived from the dissolution of orthopyroxene in three different alkali-rich silica-undersaturated melts. Findings revealed that a common composition of silicon oxide contents results from the combination of the boundary layer melts. Results indicated that certain silica-heavy melts may have been created through the dissolution of xenolith orthopyroxene at low pressure probably by their silica-undersaturated host magmas.

---

Mechanisms of orthopyroxene dissolution in silica-undersaturated melts at 1 atmosphere and implications for the origin of silica-rich glass in mantle xenoliths

Article Abstract:

A study investigated the structure of melts derived from the dissolution of orthopyroxene in three different alkali-rich silica-undersaturated melts. Findings revealed that a common composition of silicon oxide contents results from the combination of the boundary layer melts. Results indicated that certain silica-heavy melts may have been created through the dissolution of xenolith orthopyroxene at low pressure probably by their silica-undersaturated host magmas.

Similar abstracts:

• Abstracts: The kinematic history of the Pennine Nappes east of the Lepontine Dome: implications for the tectonic evolution of the Central Alps
• Abstracts: Determination of time-integrated metamorphic fluid fluxes from the reaction progress of multivariant assemblages
• Abstracts: Regional tilt of the Mount Stuart batholith, Washington, determined using aluminum-in-hornblende barometry: implications for northward translation of Baja British Columbia: discussion and reply
• Abstracts: Mid-Cretaceous transtension in the Canadian Cordillera: evidence from the Rocky Ridge volcanics of the Skeena Group
• Abstracts: Evolution of the Slave craton: comment. Northward expulsion of the Pan-African of northeast Africa guided by a reentrant zone of the Tanzania craton

This website is not affiliated with document authors or copyright owners. This page is provided for informational purposes only. Unintentional errors are possible.