9 documents found, page 1 of 1

From source to surface: clues from garnet-bearing Carboniferous silicic volcani...

ABSTRACT: This work investigates the relationships between partial melting, melt extraction, pluton growth and silicic volcanism in garnet-bearing felsic volcanic rocks that were extruded in the Iberian Pyrite Belt, at ca. 345 Ma. The garnets are of peritectic origin, displaying textural and chemical features of disequilibrium crystallization during partial melting reactions involving biotite at high temperatur...

Geocronologia U-Pb dos zircões detríticos das regiões de Moatiz e N'Condedzi, B...

From source to surface: clues from garnet-bearing Carboniferous silicic volcani...

ABSTRACT: This work investigates the relationships between partial melting, melt extraction, pluton growth and silicic volcanism in garnet-bearing felsic volcanic rocks that were extruded in the Iberian Pyrite Belt, at ca. 345 Ma. The garnets are of peritectic origin, displaying textural and chemical features of disequilibrium crystallization during partial melting reactions involving biotite at high temperatur...

Detrital zircon U-Pb geochronology of the Moatize and N’Cond´edzi coalfields, Z...

ABSTRACT: Detrital zircon U-Pb geochronology of the Moatize and N'Condedzi coalfields in the Zambezi Karoo Basin of Mozambique provides key insights into the regional provenance, sediment dispersal pathways and basin evolution. Borehole cores from the two coalfields reveal a stratigraphy spanning the early Roadian (middle Permian) to the Carnian (Upper Triassic). The Permian sandstones of the Moatize Coalfield ...

Detrital zircon U-Pb geochronology of the moatize and n'condédzi coalfields, za...

Detrital zircon U-Pb geochronology of the Moatize and N'Condedzi coalfields in the Zambezi Karoo Basin of Mozambique provides key insights into the regional provenance, sediment dispersal pathways and basin evolution. Borehole cores from the two coalfields reveal a stratigraphy spanning the early Roadian (middle Permian) to the Carnian (Upper Triassic). The Permian sandstones of the Moatize Coalfield (MC) yield...

Detrital zircon geochronology of the Lower Karoo Group in the N’Condédzi Basin...

SUMÁRIO: A Bacia de N’Condédzi, pertence ao conjunto de bacias sedimentares moçambicanas do Ciclo Karoo. O preenchimento sedimentar consiste numa sequência detrítica, com ca. 2000 m de espessura, depositada em ambientes lacustres e aluvionares. Com a finalidade de conhecer a proveniência dos terrenos fonte das rochas detríticas, foram estudadas para geocronologia U-Pb, as populações de zircões detríticos de are...

A new approach to palynostratigraphy of the middle late Famennian Gafo Formatio...

ABSTRACT: New palynological results from the Gafo Formation (southern sector of the Pulo do Lobo Domain, South Portuguese Zone) are integrated with recently studied sections and drillholes from the Portuguese and Spanish sectors. A total of 44 samples were studied, 27 of which were positive for palynomorph taxonomy. This research revealed well preserved palynological assemblages, including 73 spore species allo...

A new approach to palynostratigraphy of the middle–late Famennian Gafo Formatio...

New palynological results from the Gafo Formation (southern sector of the Pulo do Lobo Domain, South Portuguese Zone) are integrated with recently studied sections and drillholes from the Portuguese and Spanish sectors. A total of 44 samples were studied, 27 of which were positive for palynomorph taxonomy. This research revealed well preserved palynological assemblages, including 73 spore species allocated to 2...

Detrital zircon geochronology of the Carboniferous Baixo Alentejo Flysch Group ...

U–Pb detrital zircon data from the Baixo Alentejo Flysch Group in the South Portuguese Zone show significant age differences between formations. The Visean Mértola Formation and Serpukhovian to early Bashkirian Mira Formation are dominated by zircons in the 316–388?Ma age range, whereas the late Bashkirian to late Moscovian Brejeira Formation is dominated by zircons with an age range of 498–687?Ma. Detrital zir...