Fabric Code: tpr295b

Samoan ferromagnesian lithic

Subset of Samoan ferromagnesian with more lithic than crystal. Olivines equal or more than pyroxenes. Vitric and picritic basaltic lithics. Oliviines often altered to iddingsite.

Fabric Class:

Igneous Olivine: Dominated by igneous lithic inclusions with olivines.

Oceanic Basalt: Mainly contain olivines, clinopyroxenes and plagioclase, and have lathwork and mafic vitric lithic fragments.

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.	Quartz	Feldspar	Pyroxene	Amphibole	Opaques	Olivine	Biotite	Muscovite	Epidote	Garnet/ Spinel	Ig./Met. Rocks	Sed. Rocks	Grog	Lithics/ Region
Max	2	0	0	3	0	0	3	0	0	0	0	6	0	0	lathwork, vitric
Min	0	0	0	2	0	0	2	0	0	0	0	4	0	0	Samoa

Representative slides:

Slide	Site	Possible Origin	Cal.	Quartz	Feldspar	Pyroxene	Amphibole	Opaques	Olivine	Biotite	Muscovite	Epidote	Garnet/ Spinel	Ig./Met. Rocks	Sed. Rocks	Grog	Lithics
FP_1_7	Mulifanua (Upolu)	Upolu	2	0	0	2	0	0	2	0	0	0	0	5	0	0	Lathwork, vitric
FP_1_13	Mulifanua (Upolu)	Upolu	0	0	0	2	0	0	3	0	0	0	0	6	0	0	lathwork, vitric
FP_1_20	Mulifanua (Upolu)	Upolu	0	0	0	3	0	0	3	0	0	0	0	3	0	0	vitiric, lathwork

FP_1_7

Mulifanna_23v57 — Sherd 23-57 from Mulifanua (Upolu). Slide FP_1_7 from Petchey 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.

Mulifanna_23v57 — Sherd 23-57 from Mulifanua (Upolu). Slide FP_1_7 from Petchey 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.

Picritic, holocrystalline and vitric basalt lithics, with some vitrophytic. Altered olivine. Similar olivine and pyroxene levels.

FP_1_13

Mulifanna_29v311_a — Sherd 29-311 from Mulifanua (Upolu). Slide FP_1_13 from Petchey 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.

Mulifanna_29v311_a — Sherd 29-311 from Mulifanua (Upolu). Slide FP_1_13 from Petchey 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.

Oxidised sherd. Altered olivine. More olivine than pyroxene. Fresh vitrics. Lithics vitric and holocrystalline, with some picritic and vitrophytic.

FP_1_20

Mulifanna_disk — Sherd 25-26 from Mulifanua (Upolu). Slide FP_1_20 from Petchey 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.

Mulifanna_disk — Sherd 25-26 from Mulifanua (Upolu). Slide FP_1_20 from Petchey 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.

Reduced core. Mainly vitric and vitrophytic lithics.

References:

Petchey MA Thesis 1995 (Petchey, F.)