20 
Keith R. Miles. 
appavoiitly alteriJi”- to a.^'ii’rog-ates of sealy ('olouvicss ('lilorito, Avith some 
musf'ovile, s(‘1 in a ground mass of clear broken and irre,i>-ular to rt)iinded 
(jiiartz grains, and interstitial fibrous chlorit(% and si'rieite. 
Kyanile occurs in om^ or two scattered <*rystals distiiii^’uislied from the 
aiidaliisite Ijy their characteristic Ijladed form and iii,u'lier relief. Other a(‘ces- 
sories include ridile, in tiny rods and o-eniculate twins ran^in”' from almost 
colourless to dark yellow and occurring- often in clusltu's or in stri?igs of 
crystals, and fragments of bleached, obviously dtdrital biotite, and a few 
.grains of zircon. 
ORIGIN AND MKTAMORPHISIM. 
FolloAvino- are the chemical analyses of tlie ]\It. Leonora, Mt. Kenmdh and 
th(> Quinn’s rocks : — ■ 
A. 
B. 
C. 
1). 
E. 
F. 
SiO.> 
7fi-71 
82-74 
72-57 
75-35 
78-28 
84-11 
AIXX. 
20-08 
14-84 
1015 
11 -35 
9-48 
8-05 
Ee.,0.} 
1-70 
■43 
•49 
•79 
•40 
Nil 
FcO 
... 
• . • 
2-70 
] -70 
2-05 
•62 
MnO 
Nil 
Nil 
■05 
■12 
■03 
Nil 
MgO 
■00 
Nil 
9-38 
4-09 
5-00 
4-21 
CaO 
•50 
•09 
Nil 
Trace 
•11 
•18 
Na.,0 
•07 
■40 
•34 
•30 
-23 
-25 
K..0 
■11 
•20 
-28 
2-00 
■19 
•18 
H.,0 — 
•21 
■03 
•02 
■10 
■00 
■00 
H.,0 + 
■24 
•17 
3- 19 
3-10 
3-19 
2 • 15 
Tib., 
■00 
1-33 
•57 
■51 
•04 
•05 
P.0, 
. . . 
Trace 
-20 
■07 
-05 
■01 
ZrO. 
. • • 
... 
Present 
4Vaee 
Trace 
CO. 
• « • 
. . • 
• • * 
■03 
-02 
Nil 
YeS, 
... 
... 
... 
•17 
Nil 
•02 
100-40 
100 -29 
99 ■ 94 
100-40 
100-33 
99-89 
Sp. Gr. 
2-81 
•? 
9 
2-72 
2-70 
2-07 
Analyst : 
C. C. 
H. Bowlev. 
H. Bowley. 
D.G. Murray. H 
. Bowley. 
H . Rowley. 
AVilliams. 
A. S]K’(*. 
508-1 
Kyanlte-boaring andahiRite-(iua rtz schist. 
ATcinit\ 
' of Trig.. 
Station, 
Mt. Lconoia, 
, Mt. Margaret 
G oldfield 
(15, pl9). 
1». Spec. 1/2002 A mlaliisUe-<]Liavtz scliist. WA'st sloi)C of Mt. Leonora, Mt. 
Margaret (foldfiehl (17, p2.D. 
('. Spec. 1/1070 Kvanite-hearing (|uarti^-cliIoi‘itc sdiist. 7 miles east-sfnitln 
east of Mt. Kenneth, Valgoo GoldtieUl (14). 
I). 8iiec. 1/200O Quartz-nmscovite schist. Near (Imiel Paddock (102M. on 
No. 1 Kabbit Proof Pence) vicinity of Mt. Kenneth, 
Valgoo Goldfield. 
E. 
E. 
S])ec. 1/791 Andalusite hearing quartz-chlorite schist with incipient 
kyanite. Ouni]) of No. 2 Stock Well, near Water Res. 
i:U35, Quinn’s, Mureliison Goldfield (19, pl8). 
S])ec. 1/792 Andalusitesiuartz-clilorite schist with incipient kyanite. Prin- 
cess Dagmar Water Shaft, GML 843N, Quinn’s, Mur- 
chison Goldfield (19, plS). 
An examination of the abo\e analyses clearly indicates the essential 
similarity of the rocks, and the variations closidy 'reflect the mineral ngical 
differenees. in general they all show a very high iiercentage of SiO.., and 
a notable excess of Al.O, over the 1 : 1 ratio necessary to satisfy tlie CaO 
and the alkalies present. From the alumina eontent the iiereentagc of andalu- 
site, kyanite, etc., jiresont in the Leonora rock is SO.SPc for A and 20.80% 
