iii
Page
Table of paragenesis of the ores............... 00000. c ce eteceeees 35
DISCUSSION ee peca etna erie te sieiant tron TSUNEO SRC ot 35
Propertiesion Hourmilesmountaim=.:: o.qe. toe ese ce 35
Non-mevalliczd epositewennccr ewer aemrte Renae a et ben Seas 2 36
(CHEN FSo's onio:ditce o.8 oot eis ee atiemcicremest Gea Oe tbe em ee ee a a 36
SELL G Gee pees te etmER ME cy oP ect sect NREL Pie a geretys Eee RTE, Raat ween SSeS es AD ad 37
Mbraventinomme sires tet cerns eee eat ner AEN: Geomeam wach ce pen och ie RES 37
Hira Cl Oe aire pee esa cp soe inte yarn eee wpe ee RU rnc ag nes fonts Me eek Se a OUR) i, 49
Illustrations.

Map No. 1731. Mineral areas in the vicinity of Hazelton, Cassiar district,
Britishh@olumbiarer encima Seren te hee In pocket

1732. Principal veins on mining properties, head of Juniper creck,
Rocher Déboulé mountains, British Columbia............ In pocket

1733. Principal veins on the Silver Standard mine, Hazelton, British
Wolimbia estes ania erecacanre indolent Geren nn mee Fs In pocket
Plate I. Looking southeast towards Rocher Déboulé mountains, from west :
side of Skeena river, just above Hazelton, B.C.......... Frontispiece

II. A. Bulkley canyon at Hagwilget; looking south towards Rocher
WEHoulesmountainseswacp eee eA ee eee nia eee 39

B. Tuff-agglomerate in a cut on the Grand Trunk Pacifie railway, near
IBéamentistatione BiG hrm poe qee see ech cient a eee ek 39

III. A. Interbedded, fine-grained tuffs and tuff-conglomerates in a cut on
the Grand Trunk Pacific railway north of Beament station, B.C. 40

B. Sharp contact of the sediments with the granodiorite on the ridge

between the head of Juniper creek and the head of Balsam creek,

Rochers) sboulésm ountsin simmer ew seein ee ee ee 40

IV. A. Microphotograph showing chalcopyrite veining hornblende. Rocher
DerBoulesmin cher Merete ewe Petra Syn ie orn is a ee 41

B. Microphotograph showing hornblende replacing chalcopyrite, Rocher
DeBoulewmine sy wea hey ee cee et es a. 41

V. A. Microphotograph showing chalcopyrite veining and _ replacing
tetrahedrite, both cut by veins of quartz. No. 2 vein, Rocher
DerBouletmiin es mecca sce ee ee en eh teen TN vied 42

B. Microphotograph showing arsenopyrite of the second mineralization,
replacing chalcopyrite of the first. No. 2 vein, Rocher De

BO] ehriiin Crrecirs ee gue nS pierce OER GUAR ok ae Peon nei foe y ee 42

VI. A. Microphotograph showing molybdenite replacing chalcopyrite and
hornblende. No. 4 vein, Rocher De Boule mine...».......... 43

Microphotograph showing marcasite replaced by siderite. Great
© hios MLO pen bya eke en cs heen Pe nT Soon et 43

VII. A. Microphotograph showing chalcopyrite veining zinc blende. Brian
BOTRUE DLO DCU yretr Tree eer ss RCE eS yea ee 44

B. Microphotograph showing fineness and distribution of the gold.
Hiazeltone View miner ners serena iets, watt an Senet 1 Se 44

VIII. A. Microphotograph showing late deposition of molybdenite. Hazelton
Vile wana 6 eee tes eadtcaert cee hg ele meee aoe preeoce trots do aas 45

B. Microphotograph showing wolframite partly replaced by another
tungsten? mineral. Black Prince property................... 45
IX. A. Microphotograph showing high grade ore. Silver Standard mine. . 46
B. Silver Cup basin, north side of Ninemile mountain................ 46

xX. A. Microphotograph showing jamesonite later than zine blende. Barber
Bill property, Ninemile mountain.. ................0.00005 47

B. Microphotograph showing arsenopyrite in a calcite gangue, partly

replaced by jamesonite. Ninemile mountain, north side...... 47