RT Journal Article
T1 Caracterización de los minerales del dique gabroideo deMessejana - Plasencia en su sector nor-oriental
A1 Andonaegui Moreno, María Del Pilar
A1 Villaseca González, 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
SN 0213-683X
YR 2005
FD 2005
LK https://hdl.handle.net/20.500.14352/49614
UL https://hdl.handle.net/20.500.14352/49614
LA spa
DS Docta Complutense
RD 29 jul 2025