RT Journal Article
T1 Caracterización de los minerales del dique gabroideo de Messejana - Plasencia en su sector nor-oriental
T1 Mineral chemistry of the gabbroic Messejana – Plasencia dyke in the north-eastern sector
A1 Andonaegui, P.
A1 Villaseca, Carlos
A1 López García, José Ángel
AB In the gabbroic Messejana–Plasencia dyke we have distinguished three types of pyroxenes: enstatite,pigeonite and augite. Enstatite and augite have been the first minerals that have crystallized at high T(1100ºC – 1150ºC). Pigeonites (@1000ºC) are later and finally appear symplectic two-pyroxene intergrowthsaround the orthopyroxene. Plagioclase have a continuous zonation with cores of An75 towards rims ofAn18. Occasionally, there is a micrographic intergrowth of orthoclase–quartz or albite-quartz interstitiallyto the plagioclase and pyroxene framework. Three types of amphibole have been distinguished: ferroedenite,magnesiohornblende and ferroactinolite. The estimated temperature range of amphibole crystallization islow suggesting that most amphiboles are subsolidus. Finally, biotite are FeO and TiO2 rich, its crystallizationbeing late when residual liquids were enriched in those elements
PB Sociedad Geológica de España
YR 2005
FD 2005
LK http://hdl.handle.net/10272/8696
UL http://hdl.handle.net/10272/8696
LA spa
DS Repositorio Institucional de la Universidad de Huelva
RD 31 may 2026