650 
ANALYSES OF SILLS 
FRANK F. GROUT 
TABLE I—Continued 
AND MASSES SUPPOSED TO BE RELATED TO THE DULUTH 
GABBRO 
19 20 21 22 23 24 
SilicaySiOzeeaeee eee 49.18 49.88 50.86 47.25 49.78 47.05 
Alumina Al,O3.......... IQ.O1 18.55 15.72 31.56 20.37 32.03 
Ferric oxide Fe:03....... 0.89 2.00 OT Tell inaaersite eRe teee 0.34 
Ferrous oxide BeQiie ae 7.79 8.37 2.48 2.20 0.60 Hoel 
Magnesia MgO......... 6.42 5-77 3-55 0.27 I.07 0.15 
LimeiGaOee eee eee 9.12 9.70 10.52 15.30 11.86 15.85 
SodarNaOkeen en sheen BN32 2.50 3.890 2.52 4.39 I.00 
PotashykcOre eee 0.82 0.68 0.90 0.37 0.46 0.05 
Combined water H.0-++.. 2.00 I.04 2.53 0.40 1.70 1.36 
Moist tare ERO is aiesa eae saree over aed ie Setuss cya ayarie ter all Cepeda conceal Staveua lawn eiepvenerl Mote Gist ale eve netstat | eit te eo eee eet 
Carbon dioxide CO:..... AE TACE so | BAR choy Ne Si Pe need tc RO HM at ne | 
cLitaniawli@ seep peeeeeae I.09 DeLOes heatese sealers tee ee None) Alii eee 
Phosphorus oxide P2Os...|..........- OnLO) deullcrstacheetasiel less epee races.) ietcecn tee 
Manganous oxide MnO .. 0.51 OOO sail Saracen soe e tarereiiols revoveneks O08) oa eens 
Barium oxide BaO...... None Colo} Meal Ica a igaiiycs i leant ey ger Pye None! 3212.2 eee 
Other elements......... MMTACES Wis |Essrekes mesures levee eras ioveuctatay ler cacneey entrel Praces: .<|- ea rosea 
100.21 100.21 100.22 I00.05 99.80 90.50 
Specific gravity......... 2.84 2.023-2.Q70|........... About 2.7 ZiO7O. i). ern eee 
° 
TABLE I—Continued 
ANALYSES OF RED-RocK INTRUSIVES AT DULUTH 
25 26 27 28 
SilicayS1Oa eee eer 66.92 66.36 75.78 65.56 
ANvamine, ANHOR 3 sop odcsobocdcoodcoune I2.51 13.33 II.09 10.06 
Ferric oxide Fe.@3........-........- 4.36 7.80 2.00 14.40 
Ferrous oxide FeO................-- 3.93 Bi KOR le Wem [Eis aie es aeererecerohs 0.23 
MagnesiayMicOsneeern eee ee r.66 I.20 0.65 0.73 
Prime Ca@ ose ie hese eateneede 1.20 2.14 0.86 0.96 
Soda Nas Ope circ eee 3-45 2.63 6.43 2.25 
Potash KeQ@ xsce sec. ees aere aie terroenetee 3.98 3.05 1.06 2.88 
Combined water H.O+-............. Tes Ter 1.82 0.86 
MoisturesH:Ol— reper eee (oye Lo Jaeger aaa Aa! Piet re Reel bala cy ASIN cia Goiola o 
Carbon dioxide COz...............-- (eyo) WH ean Trine a Ur ene MM inn er ral ERG alee Oc qaa.o 
Mitamia Pi Oey ees he syemciorcte ais ciel COyAL OT Ses HON ea PL Ce aa Ar bal tine aM aE ba RUN als ooo. 
ZILCONIayZL Ose eee a eee (oar an a en ae een Beanie ers) iis bic aus 0 .oic-.0 5 
Phosphorus oxide P2Os...........-.-- (oye ss eigenen oe en OER Ene erm. Si Waco 
SulphuriSep aera ioe saeco tee (5c), Wa Pn Serhan awl aE eae rien ie in laid. o0 oS 
Manganous oxide MnO............. (on aah BET ese Hone Een too lSsemockedddooos 
BariumyoxidesBbaOrereeenieaee eae (oye [ sean [CEUN ISIS ae Hebe) Ines nanan taal re Malena choo chia 
100.76 100.77 99.78 97-93 
Specicyetaviby meer eerie DEPOT A) il eee tea eer Heil ha citecer napecebetcel | Rrerer ete aeeree re teteRe 
