major intrusive complexes of Monchique, Sines and Sintra in W. anra SW Portugal, to,,,.etLerwith their b...to theralitic minor intrusives in west central Portugal; about 80 small basanitic/iamprophyric to nepheline...Sezmount of the Gorringe Bank off the SW coast of Portugal. Most of these occurrences have been dated isotogically...Province are far from insignificant: the Monchique complex, for example, is one of the world's larger...feldspathoidal to peralkaline gneisses of Alentejo, Portugal (Floor 1974). Genert:lised descriptions of each
Petrology and Petrogenesis of the Monchique Alkaline Complex, Southern Portugal by N. M. S. ROCK Institute of...November 1976; in revisedform IS March 1977) Monchique is a sizeable subvolcanic ?laccolith, unusual...malignite and agpaite, veins of foyaite-pegmatite and shonkinite, and dykes of lamprophyres and peralkaline tinguaite...little to the evolution of the complex. INTRODUCTION T H E Serra de Monchique is a mountain range in the...the far south of Portugal, commanding both Atlantic coasts of that country and separating the provinces
Composition of Alkaline Rocks: New Data from Southern Portugal and East Africa N.M.S. Rock Department of Mineralogy...Abstract. Rb-Sr whole rock isochrons for the Monchique and Mt. Kenya complexes, together with a series...alkaline complex. The 85 km 2 mass of nepheline syenite forming the Monchique intrusion in Portugal could...nepheline syenites from one complex (e.g. Rangwa, Section 4). The Monchique and E. African complexes therefore...well-represented for example in the Oslo, Gardar, Monchique and Monteregian intrusions, although in each case
