[Reprinted from Economic GroLocy, Vol. XIII., No. 5, July, 1918. |

THE COPPER SILVER VEINS OF THE TELKWA DIS-
TRICL, BRILISH COLUMBIA.

V. DoLMAGE.

CONTENTS.

PAGE
MESO CUCU Mere eee oe a i en ee eS eR E ee e 349
POC OLIOUE scr nrt en ee eee oa ae a ee SEEN Ks oe Pane een Bre 349
le pO Cetera greeny a hs NAC a cee Ges ae aes as oe 350
COO Cay ee ee oe er yk sd RET ee ee Se i 350
IGOR IME GeOlOCVetn ae ea ee a ads Federdes neces 352
Wenig at Contact or Coast: Range-Batholith: 0.0 o.050.s.cc5 cee tee 353
Veins Close to Granodiorite of Telkwa Mountains ................. 355
EE AC LANC e nC ne eae eS E YB mae analy woes eS es 356
WWintitetsaiie der Sh CClieers re eek ee es sk) ie te Sie oa oe 356
Ope ei isstinely pe 7553 sa ee ee he ae Petco GE eee ee 362
SPelenoalde 2 Greed Cees caer ee ets eee SE le alae asus an uae ake 362
SGiStUne ae ee NU heard ii os a oe 363
Ope ey etn mice Pt he hin ee 363
PRU eal ee ee ee ce ake Sie soak 366
Aga OUeS (Gee eer Sh el Ses srs ade es Oe 3607
GMCS Ieee ee er sins gems eee 368
ND ieiimncigye. @MaCO Cli Cue mrss Be eee rs eS iene ess ory el 369
Giana GesncaiONVe \ CLS awe. oe sb nine st ween ee es so Ss, tees 372

INTRODUCTION.

The following is a brief summary of some of the results which
were obtained by the writer in an investigation of the geology
and mineral deposits of the Telkwa district. The field work was
done during the season of 1915 under the direction of the Geo-
logical Survey of Canada. This work was supplemented by a
considerable amount of petrography and mineralography carried
on in the laboratories of the Massachusetts Institute of Tech-
nology and under the very helpful and inspiring supervision of
the geological staff.

LOCATION.

The region in which these veins occur comprises approximately
40 miles from east to west and 22 miles from north to south, and

349

= Siti.