Table 7: Quantitative analysis indicating the amount of each mineral present and the extent of alteration

Scores
1	2	3	4	5	6	7	8	9	10
Colour (of thin-section to naked eye)
Transparent, colourless								Near opaque, very dark green	Predominant non-green colour
Grain size (from estimates of original pyroxene average grain size)
<0.25mm	0.25mm	0.375mm	0.50mm	0.75mm	1.00mm	1.50mm	2.00mm	4.00mm	>4.00mm
Pyroxene alteration (visible in thin-section through x4 and x10 magnification)
All pyroxene grains are unaltered (i.e. fresh)	Less than 50% of pyroxene grains have <5% altered	A majority of the pyroxene grains have <10% altered	All pyroxene grains have <25% altered	All pyroxene grains have between 25%-75% altered	All pyroxene grains have between 75%-95% altered	Less than 5% unaltered pyroxene	Small amounts (<5%) of unaltered pyroxene	Possible pyroxene pseudomorphs	No evidence of pyroxene
Feldspar alteration (visible in thin-section through x4 and x10 magnification)
Fresh, unaltered Fsp with clear cleavage and twinning	Less than 5% alteration on 50% Fsp; clear twinning evident, cleavage not apparent	All Fsp <10% altered: clear twinning evident, cleavage not seen	All Fsp between 10% to 50% altered: clear twinning evident, cleavage not seen	All Fsp between 50% to 90% altered: clear twinning evident, cleavage not seen	Less than 10% original Fsp: twinning evident, cleavage not seen	All Fsp altered, with clear ghost shape and twinning obvious	All Fsp altered, with ghost shapes and suggested twinning throughout	All Fsp altered, with ghost shapes and suggested twinning evident in few places	No evidence of Fsp
Opaque minerals (seen in thin-section through x4 and x10 magnification)
Coarse, angular opaque grains, >2mm	Coarse opaque grains, with alteration and skeletal structure or elongate grains >2mm	Coarse angular opaque grains with clear polygonal skeletons >2mm	Medium, angular opaque grains, 0.5mm to 2mm, with no skeletal or ladder-like lattice seen	Medium angular opaque grains, with distinctive polygonal skeleton(s) 0.5mm to 2mm	Medium angular opaque grains, with elongate/ladder-like grains 0.5mm to 2mm	Medium angular opaque grains with eroded appearance and no skeleton visible 0.5 to 2mm	Fine opaque grains <0.5mm	Opaque grains different from descriptions 1-8	No opaque grains seen
Amphibole and Mica (chlorite and biotite)
No amphibole or mica seen	Primary amphibole present	Secondary amphibole present
Epidote
No epidote present	Very fine cloudy masses present	Distinct, small (<0.2mm) grains present
Apatite
No apatite seen	Small grains (<0.1mm) present	Larger grains (>0.1mm) present or plentiful fine-grained apatite
1	2	3	4	5	6	7	8	9	10