Fabric Code: tpr343b

Yanuca felsitic pyroxenic

Probably derive from small local streams of southwestern Viti Levu. The volcanic rock fragments in Yanuca felsitic tempers are dominantly grains with a felsitic mosaic groundmass of intergrown microcrystalline quartz and feldspar.

Sites:

Mineral and Rock Abundances

None (0) Minor (1) Few (2) Common (3) Frequent (4) Major (5) Very Dominant (6)
0% 0-5% 5-15% 15-30 % 30-50% 50-70% 70-100%

Name Cal. QuartzFeldspar Pyroxene Amphibole Opaques OlivineBiotite Muscovite Epidote Garnet/ SpinelIg./Met. Rocks Sed. Rocks Grog Lithics/ Region
Max 1 3 3 2 1 2 0 1 0 1 0 3 2 0 felsitic, microphaneritic
Min 0 3 2 1 1 1 0 1 0 1 0 3 2 0 Fiji

Representative slides:

Slide Site Possible OriginCal. QuartzFeldspar Pyroxene Amphibole Opaques OlivineBiotite Muscovite Epidote Garnet/ Spinel Ig./Met. Rocks Sed. Rocks Grog Lithics
FL_1_9 Yanuca (Viti Levu) Yanuca 1 3 3 2 1 1 0 1 0 1 0 3 2 0 felsitic, microphaneritic
WD_61_15 Yanuca (Viti Levu) Yanuca 0 3 3 2 1 2 0 1 0 0 0 3 2 0 felsitic, microphaneritic

FL_1_9

Yanuca_AH73 Yanuca_AH73
Sherd AH-73 from Yanuca (Viti Levu). Slide FL_1_9 from Leach Collection, Auckland University. x4 Magnification PPL (left) XPL (right). Scale bar: 0.5mm. High resolution image (user: Guest pwd: Guest) or full slide in VIMIPO. Imaged by K. Hardy and M. Leclerc, ANU.

Early plain sherd.


WD_61_15

Yanuca_21_53 Yanuca_21_53
Sherd 21-53 from Yanuca (Viti Levu). Slide WD_61_15 from Dickinson Collection, Bishop Museum. x4 Magnification PPL (left) XPL (right). Scale bar: 0.5mm. High resolution image in VIMIPO (user: Guest pwd: Guest). Imaged by K. Hardy and M. Leclerc, ANU.

Felsitic pyroxenic.


References:

190 Dissected orogen tempers, Viti Levu, Fiji 1999 (Dickinson, W.)