The Florence tribune., 1901-10-19

all can, near the peaks above the South Comstock, northeast from the Silver King mine, belong to a rock closely allied to the ordinary phonolite, but deserving to be distinguished from it by the small amount of nephaline it contains and it's structure. There are many stout feldspar crystala in these rocks and it is not laminated, in it's prevalent deeomposed conditions, it bears little resem blance to tue normal phonoiite, though the fresh rock of the two types are nearly identical in chemi- cal mposition-sadalite and nosean are as abu ndantas any other type.
 single mass Of this rock occurs at the South Comstock. contains near ly the same chemical and mineralogl- cal composition gsi the phouolite, bat has less nepehline sodaiite, and nosean and a primary grain hornblend is asso- ciated with the augite The rock is pearl gray in color, with fine granu- lar structure, excepting on the porphy- ry, where 1t becomes porphyritic The presence of this granular equivalent of phonolite in the part of the volcanic center of the highest peaks and the California Tunnel site, suggests more definitely than anything else. of the St. Louis Tunnel site, actual vent of the volcanic, southeasterly.
 On the southeast shou Iaer of the St. Louis is mass of agitit., synite DOT phyry, with many small feldsplr and augite crystals, in very close grained feldspathic ground mass. Little of the limestone or plagioclase feldspar series is present. Nepheline sodalite and nosean are wanting, but the strongly predominate alkali feldspar ally this rock with the phonolite series. Horn blend and mica are subordinate consti- | tuents on the Big Slide mine.
 The last eruption of the Silver King Basin produced nun per Of narrow dykes of dark basic rocks Thsse are usually much deconposed, on the west side of the Big Slide mine, southeast from the Silver King mine, but from the few fresh occurrences it is plain there are two distinct rock types among these dykes, one the nepheline basalt, | ~ft, f..1d
 The latter type is shown in the fresh condition, in the Andes mine in the Silver King Btsin. Sontherly the former occurs in numerous dykes, ou the other side, on the west of the East King, being shown in nearly fresh co D. dition in the Providence mine. Dykes are to be seen in the Malpese mine, on the south side of the Boston mine, shows the dykes of the Fisher lode, of nepheline bssalt Very much de- composed and locally impregnated with
 ore, many othe- short dykes on the
 West Malprese mine belong to one or the other of these large basaltic types
 On the South Comstock mine, shows gold silver and copper, at 1S0 footleve,
 the East Comstock is surface pros
 peet The North Comstoek ear bonates
 of lead aud gold A tunnel 90 feet
 deep. The West Comstocl1 is surface
 prospect the Extension of the South
 Comstock shows antinony, silver and
 lead at the bottom of the incline shafi 90 feet. Next comes the Californi,
 Tunnel South tunnel depth l0(
 feet, shown in the breast of the tunne lode of five feet. Will assay from $l, , | to $l5 per ton, in gold The St Loui
 Tunnel is under roof 75 feet, sh ows
 lode 10 feet which will assay $l0 to $1 per ton in gold The Big Slide mine
 in westerly direction from the St
 Louis Tunnel about 5 900 feet, shows
 high grade of copper, from 9 to Is pc cent of copper, so high as 50 to 95 pc
 cent of copper An inclined shaft 5 i. feet deep, ten tons of ore on the dun i. and a tunnel l25 feet deep, southerly and another tunnel 250 feet deep east erly, another tunnel 160 feet deel
 shows 30 feet of ore will average pc < cen. of black copper. The Andes min h is located southerly from the Silve
 King mine, is tunnel of 275 fee
 shows titterei and shows 6ne gin i, blend in big quantities, will averag
 $25 in silver and b per cent in lea
 and sl0 in gold The East King is
 surface prospect; very little work 'p done The Providence mine is an i er clined shaft so feet deep, shoy @ sulphate of copper, will assay 25 p 7 cent of copper, and tunnel No. 2 is 4 streak of antimonial silver; will asss y 400 ounces of silver On the end \ this claim is an open cut, with feet N copper, will assay 10 per cent of co < per, $l0 in gold. Further to the sou \ comes the Malprese mine, is a tunn d on south end of claim, shows a lode y fine zine bIende, 10 feet, with pi ! streak 2 feet wide, will assay 3 N ounces of silver and one ounce of gol N to the ton. Further to the east com \ the Boston lode, is surface prospe, A straight shaft 20 feet deep, 2 inches
 ore, will assay $l5 h gold to the to
 Further to the south comes the Fish \ lode, surface prospect, shaft l5 fe