Bisbee daily review., 1904-10-22
PiCaCho Mine
 Greatest in Sonora
]. p. CASEY HAS JUST CoMPLET- ED TOUR OF THAT DISTRICT.
What is Doing Acres the Border in the Mines-Written For Review By Reg uiar Staff Correspondent.
(By J. P, Casey)


 Barring the Fl orc consider the PicachO the greatest gold mine in Mexico. The district is but little known, but is rapidly coming to the front. The Howard & Lightfoot prop erty has been sold for SSo, GOO gold not fifty feet of work done. Jim Finch owner of the Veta Grande. lying east of the Guadalupe on the main gold reef sold for S25eO OOO gold. The Guo6alupe is working a good force and shows good ore in every opening this property is now in the mine class. I have lately had made a map of this district showing location of properties. area of claims and general trend of main gold reefs. together with a careful study of the geology of the region.
 The Picacho mine is situated inn mediately behind and south of the Picacho peaks which rise high above the surrounding country. Sharp first and secondary foot hills cut by deep canyons extend south and west. Strong jasper and quartzite dykes radiate from the peaks south, east and west.
 The veins seem to follow general trend of the dykes and where opened are strong and well defined. There does not appear to have been single attempt at the gealogy of the region. the genesis of the ores or the filling of the veins. The veins are undoubtedly true Assures caused by the general time and have passed through many profound changes since; secondary mountain ranges and deep canyons be- ing formed; subsequent volcanic ac- ton causing extensive movement. daming up canyons and forming lakes, while the now silent cones of extinct volcanoes. showered ashes. tufts. lapilH and scoria over the sur rounding region causing the canyons to ill up withd ebris. subsequent movement causing drainage of lakes and alteration Of surface.
 These changes. causing change of water level, facilitating weathering and enrichment and being no doubt prime factors of the deposition of the rich gold ores. which no doubt. com ing up in the original mogma were carried into the veins at the time os flling-the quartz undoubtedly being deposited by hot siIitious polutions. The veins all show incrustauon, in- dicating the silica to have been leach ed out from the tuffs. lapilli and other volcanic products and deposited by ascending hot currents. Generally gold deposits differ from those of oth- er ores. It is commonly assumed the unaItered ore carries gold generally assoicated with pyrite and quartz the pyrite altering to iron-sesquiox- ide. permitting the quartz and leav- ing the gold free. Further detera- ton by surface waters teaching out the iron, the gold remaining in situe. My experience shows this to be com mon with most of the gold deposits seen in Mexico. But even so, some of -s4le gold fust have gone into solution by ferric-sulphate. carried downward by descending surface currents and deposited as native gold. especially with antimonial sulphides. as pyra- rgyrite. the rich ore of the Pecocho. If these conclusions are correct. what are reached in this district?
 deem it safe to conclude that the zone of weathering and oxidization in the district easily exceeds twelve hum dred feet.
 The chance of encountering bon aza or chutes cannot be expressed in figures-work and capital only can tell the tale-and more true than all only the miner can make a mine.
 Around the old city of Arizpe things are brightening up. Mir. E. 4. s s (. s 4. q. s ss. z. .s. i. !. <. z. (.