FIELD OBSERVATIONS IN NORTHERN NORWAY 719 
central part of the mass was not protected against the lateral 
pressure which prevailed during the whole crystallization. 
The result of the differential squeezing during the crystallization 
period has therefore been the ultimate separation of the last con- 
solidating constituents of the magma. During the continued 
pressure after crystallization of the main rock mass, this last 
residue has been squeezed into the already consolidated rock as 
ANALYSES CALCULATION OF THE NORM 
No. 8 No. 9 No. 8 No. 9 
SHOh.ooascapoansese 49.12 67.40 Quartzierase cee 3.36 19.74 
BIR @ open ets ita. sctevs 2.46 0.20 Orthoclase......... 2.22 II.12 
JNUOF nanoeSuae oe 13.70 16.52 Al biteyaeencamcnie + 22.01 48.73 
eo Oakecrere cise gif scores I.05 2.33 Anorthites peer 24.46 13.34 
HE ORS oie cicero bs 10.67 0.34 GCorundumeeeeeee ee eee 0.10 
INTO). CoB Se naees 0.18 0.03 
IW O) Cag nomena 5.19 0.88 SDR Sale yerpeiere 52.05 93.03 
(CHO) S peo Deere II.02 3.43 | 
BAO Pair, an 0 Trace Trace Diopsidesneee eee Lett SEG | ayete tepals 
NEY Oveeaig ne ceemeae 2.58 5.76 Hypersthene....... 18.17 2.20 
1KG{0) se Renee 0.44 I.03 iFlematitenee acetone 2.24 
IPOs G SRO eee 0.22 0.50 Magnetite......... Bir Sie will [tates crane reds 
ey Vaverereiersi shes cis « 0.19 o.10 Ilmenite.......... 4.71 0.61 
COD eacrneaias: I.21 None iApatitenpeen cers 0.52 1.34 
MO af essyee joi seiaie, oe T8317) 0.81 Ay nite seers 0.36 0.19 
To Ore iSaack evels 0.01 (0.05) 
ZS Hempenee nee 44.05 6.58 
ho tall nyaya are 100.31 100.41 
= OOS ACs 0.10 0.05 MgOol: FeQmol FR QAvL tl Sopseevaterteners 
Total 100.21 100.36 
KEY TO THE TABLE OF ANALYSES 
No. Petrographic Name Symbol Locality Analyst 
8....| Garnet-amphibolite Uae Mere AS Bjérkaasen Mine Olaf Réer 
9....| Aplitic granite 1D? Ag eec Brugsaas Naima Sahlbom 
lenses, stringers, and bands of aplitic granite. Their ordinary 
arrangement parallel to the schistosity shows that this must have 
been partly developed already during the consolidation as crystal- 
lization schistosity. 
The magmatic water and mineralizers with their dissolved 
substances seem to have taken their own path, having a more 
active power of motion contrary to the purely passive motion of 
the ordinary squeezed material. 
They have given rise to replacement phenomena and formation 
of ore deposits, still younger than the aplitic granite. 
