Fabric Code: tpr345

Yanuca placer

Concentrated from a non-placer aggregate of dissected orogen type analogous to indigenous Yanuca tempers

Fabric Class:

Pyroxenic Opaque: Dominated by pyroxenic inclusions with opaques.

Dissected Orogen: Dominated by plutonic lithics such as microgranite, and those with microphaneritic textures, as well as metavolcanics. They have K-feldspars dominate, in addition to plagioclase.

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 0 1 2 4 1 4 0 1 0 1 0 3 1 0 microlitic, felsitic
Min 0 1 2 4 1 4 0 1 0 1 0 3 1 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_1 Yanuca (Viti Levu) Yanuca 0 2 3 4 1 3 0 1 0 1 0 3 1 0 microlitic
WD_61_19 Yanuca (Viti Levu) Yanuca 0 1 2 4 1 4 0 1 0 1 0 3 1 0 microlitic, felsitic

FL_1_1

Yanuca_AH23 Yanuca_AH23
Sherd AH-23 from Yanuca (Viti Levu). Slide FL_1_1 from Leach Collection, Auckland University. 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.

Early dentate. Local.


WD_61_19

Yanuca_21_59 Yanuca_21_59
Sherd 21-59 from Yanuca (Viti Levu). Slide WD_61_19 from Dickinson Collection, Bishop Museum. 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.

Placer sand.


References:

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