Arizona republican., 1909-03-14
PR0SPECT0RS'
 VIRGIN FIELD
Special Contributor Tells of
 Pioneer District

Troy, Arizona, March 10.-Hav-
 ing read the United States geo. logical survey descriptions of the
 various mining regions of the west
 and personally seen and studied the
 geological formations of many of the ! camps of the southwest and old Mex
 ico the writer believes that he knows
 rich mining district when he sees ' it. and that he is justified in saying
 that the Pioneer is as rich as the richest.
 This district is located fourteen
 miles northeast of Kelvin, the near
 est railroad point, and sixteen miles
 south of Globe. and is in Gila county IL lies on the south side of the
 Pinal mountains, seven miles from Troy. and Is a small district, not greater than six miles by twelve in
 area.
 Twenty-seven years ago the rich
 silver-lead Pioneer mine was being
 worked, and lies in the heart of this
 district. It has produced it's million or more of silver dollars. Along about that time another rich silver-lead
 mine, Fl Capitan, was discovered and
 worked. It lies two and a half miles south and east of Pioneer, and has produced much rich ruby silver.
 Three causes combined to produce their downfall, and they have been idle these many years. First, the crude way of reducing ores of those days: second, the crude pumping fa- cilities: third, the fall in the price of silver.
 Recently a new company composed of local (Globe) and eastern parties called the "El Capitan Development
 Company" has opened out and is successfully working the Fl Capitan.
 The Bob Tail, a copper prospect, | down 80 feet, per cent copper. sit- uated two miles north of Pioneer and | the Little Giant copper prospect, sit- uated half mile east of Fl Capitan. | down 50 feet, 6 per cent copper, com 1 pletes the list of mines in this dis | trict.
 As to claims, some half-dozen par ties have from one to dozen claims l each. The rest of the district be- | longs to Uncle Sam and Is 6 glory | field for the prospector.
 Now, reader, you want to know |
 my reasons for saying that this is to ! be a rich district? Very well. Come | on. If you have not read, then read the United States geological survey | or go and examine care
 fully the formations of the different | camps and you will be surprised to note the similarity of rock foru,a- tions. It matters not in what state or territory it is, the same peculiar association of the igneous or inter- nal, with the sedimentary or exter- nal, mineral rocks that constitutes a good mining district. Throughout the Rocky mountain region, a description of one is but a geological epitome oc another. In a country where there are no eruptive rocks, there are no ores nor mines. There may be slight local differences in the arrangement of the eruptive, with the sedimentary rocks, but you will find no general In each and all of the camps, you will find granite as the basic rock: you will find some. l. if not all, of the many porphyries; you will find the diorites, the basalt, canbrian Quartzsite, blue and dolo- mitic limestones. Nearly every rock from the earliest to the latest periods will be represented, and they will be in the same general arrangement: The porphyry wedged in between the lime, or vice versa: the diorites and diabase or iron as a capping: also lime cappings. The porphyry and lime rocks, sometimes standing ver- tically, or again, extended horizontal ly. You will find true Assure veins, contact veins and blanket veins. You will note the close proximity of the internal and external rocks. and an abundance of iron is found in all