Jump to content

HardPack

Members
  • Content count

    61
  • Joined

  • Last visited

Community Reputation

49 Excellent

About HardPack

  • Rank
    Member

Profile Information

  • Location:
    Sierra Nevada
  • Interests:
    Prospecting, Coin & Nugget Detecting
  • Gear Used:
    TDI SL, Xterra 705, Gold Racer, AT Pro, Gold Hog Mats

Recent Profile Visitors

662 profile views
  1. Finding Pocket Gold

    "Orogenic Gold Deposits" by geology films 2014 (on YouTube) covers mountain building, high pressure fluids, faults, earthquakes, pulses and gold deposition. One item of interest was regarding the precipitation of gold after crossing a wall rock containing "carbon". The carbon (C) combined with hydrogen (H) to form methane (CH4). Methane (gas) interacted with the quartz solution causing the gold to drop out of solution is the green schist zone. The Tuolumne County pocket mines were associated with "diorite dikes" and secondary quartz crossings passed through a "black mineralized slate" wall rock. These crossings were at an acute angle to the the primary NW vein (Sonora Fault). The Siskiyou pocket mines are apparently associated with "Andesite" dikes which is the extrusive equalivalent of the intrusive "Diorite". There are seven short informative videos covering the Orogenic deposits around the Pacific Rim, check them out.
  2. Spring Has Arrived?

    Finally finished up with the milling chores, attempting to get back up into the detecting/prospecting saddle. Made a short scouting run out to a local ridge in the foothills; found some old placer workings, stacked rock and a depression era cabin site. While crawling out through the brush I came across a series of prospecting holes. Followed them up slope to a worked out surface quartz pocket. According to "The Tertiary Gravels of the Sierra Nevada of California" 1911 by W. Lindgren a portion of a tertiary eocene river channel cuts across this ridge under all the brush. For you that are interested in "quartz pocket mines and float" apparently the extrusive "andesite" is the volcanic equivalent of the intrusive" diorite". From my understanding in the southern mother lode the pocket deposits were associated with diorite dikes; in the Siskiyou Mountains of Northern California and Southern Oregon pocket deposits were associated with andesite dikes. Go figure... Anyway I am dropping the chainsaw mill for some pruning shears and headed back into the brush to attempt to change the "were into an are". Been getting a little taste of winter; managed to mill enough downed "fir" to cover the water tank then some.
  3. Prospecting & Mining Reference Materials Check out the University of North Texas Digital Library website https://digital.library.unt.edu Use the search engine at the very top of the UNT page to search the library. The library has loads of various documents regarding “gold” including mining/milling, mineral deposits, tertiary channels, geology throughout the Western United States and Alaska. For those of you interested in the California Southern Mother Lode check out the minerals industries surveys of the California Mother Lode including Calaveras County (part 1) and Tuolumne and Mariposa Counties (part 2) by Julihn & Horton 1938/1940: Mineral Industries Survey of the United States: California, Calaveras County, Mother Lode District (South). Mines of the Southern Mother Lode Region. Part 1 -- Calaveras County Mineral Industries Survey of the United States, California: Tuolumne and Mariposa Counties, Mother Lode District (South). Mines of the Southern Mother Lode Region, Part 2 -- Tuolumne and Mariposa Counties Hardpack
  4. Finding Pocket Gold

    "Fists Full of Gold" by Chris Ralph has a good section on "seam deposits" that appears to be related to "pocket deposits" and quartz feeders. Diorite is a member of the diorite/gabbro family which are a meta-volcanic. Greenstone meta-volcanics are a source for chloride. I found a old reference to the "crossings" as being partially open and as running within and parallel with the diorite dyke's strike. These crossings are also composed of diorite. The "crossings" refer to the crossing with groups of quartz feeders within the diorite dyke to form pocket gold. The requirement for a metallic slate may be referencing to the requirement iron sulfides. According to Chris gold may be deposited in three hydrothermal mineral pulses. After the main fissure is full the third pulse fills the seams (feeders?) without closing off the seams completely. This may be how the quartz feeders continue to fill the "pockets" within the diorite dykes. I have been working a claim know for pocket gold with the following sequence from west to east: black slates with iron sulfides and narrow quartz stringer, greenstone of either dibase or grabbro with narrow quartz stringers, serpentine, the main fissure quartz lode vein then a igneous feldspar porphyry. Old surface diggings follow the surface stringers to the crossing with the main quartz vein with deeper excavations at these intersections. What gold I have found is rough but not as rough as you would expect from a pocket deposit. Merton found a reference to "potash feldspar" in the study of the Shoo Fly Complex.
  5. Merton, I am sure of the context you are referring to regarding chloride. Could it be a carry over from the "chlorination process" to free gold from sulfide ores yielding a "chloride of gold"?
  6. Finding Pocket Gold

    According to a couple of diagrams of the Bald Mtn pocket deposits. A diorite dyke fissure containing three quartz veins has a strike of N 30 W cutting across a slate formation with a strike of N 30 E. The dip of the dyke is 30 degrees west with one quartz vein at the hanging wall, one at the foot wall and one middle vein. The multiple gold seams are indicated where narrower quartz feeders that strike the main diorite dyke veins at an angle. Apparently, it was not uncommon for one the dyke veins to be barren at the feeder seams. The top view diagram indicate four crossings lines running parallel within & along the strike of the diorite dyke. Where these crossings intersect the gold seams of the quartz feeders gold pockets form in one or more of the three dyke quartz veins. I am not clear on what the crossings lines are indicating. Where the dyke veins cross the feeder seams? There are several references to shoots which I assume is referring to the combination of diorite dyke vein structure.
  7. Finding Pocket Gold

    I am apparently a little more than confused. When you say "pocket gold" are you including pocket mining? In1999 the Tuolumne County Historical Society republished a 1901 edition of the illustrated historical brochure of "Tuolumne County California" which covered the patent mines and mineral belts through the county. The brochure has a section on "pocket mining" in the vicinity of Bald Mountain and the Big Bonanza pocket mine. It defines "pockets to mean an agglomeration of gold held by quartz and often solid masses of metal without any quartz. From the text " Pocket mining is reduced today (1901) to an absolute science... Understanding this class of mining watch for every sign known to the practical miner....Shoots almost invariably come to the surface and continue down on the line of crossing till a pocket is found. There are other things needed besides crossings- the right kind of metallic slate, that cuts the veins obliquely; then there are gold seams, which are small quartz feeders, that the strike into the vein at certain angles. Often they of themselves are rich in gold... Here is what I gather: a main fissure vein strike is some where around 30 degrees west of north with metallic slates on both the hanging and foot walls. At varying depths where the shoots (quartz stringers?) cross the main fissure vein at an oblique angle gold seams (pockets) can form. Am I correct? Is this related in anyway to the Gold Hill pocket deposits?
  8. Spring Has Arrived?

    Another "sign" a pointing to Spring. The high country "maple leaf bees" have come out of hibernation. Ran into the road crew today, news ain't to good for the traveler. Been pushing through 15 and 20 foot drifts, boulders and downed trees just attempting to get to the pass. Don't expect the pass will be reached anytime soon. I tap each of these bees by hand for their tasty "broad leaf maple" flavored honey. Normally, would have a roadside "honey syrup" stand setup by now. At least got a few good listeners that can got a "B" note ... in flat. How's the lower on the mountain detecting been going?
  9. Spring Has Arrived?

    Got another MD hit today in the ferrous range. Turned to be the top section of the stove pipe. Was informed by a marmot that Spring is definitely on the way. Probably around the 4th he figured. We both have our digits crossed for the fireworks making it over the high passes in time for the celebration... along with any news about the Republic. On this Memorial Day weekend... to the memory of all those shot full of holes and those lost in battle.
  10. Spring Has Arrived?

    The two photos show the same location in March then in May. The next few days are warming and runoff is definitely on the way. This area was once a logging camp then a cow camp. This side eventually drains into the upper Stanislaus. If I can find the old bunkhouse I may in for some poker winnings. Further up slope a lady kept a cabin with a brass bed somewhere along the old spring. They were able to power a log mill with the drop from the spring head to the mill site. Lots of tree are down, going to be late June before the road opens.
  11. Spring Has Arrived?

    Are you sure you smell gold pard, I ain't had a hit in the last ten miles...
  12. Spring Has Arrived?

    Ridge Runner, Currently at 7000 feet the temperatures are in the high sixties to low seventies with more weather in the forcast. To date close to 40 feet of snowfall for the season with ten feet plus on the ground. The bears are heading downhill into the river canyons looking for food. The Sierra foothills picked up 64 inches of rainfall this year. This kind of water should dig out and move the gold. You doing any civil war relic detecting? HP
  13. Awoke to a light coming down from the attic access this morning. So I blew out the candle put down the beans, grabbed up the MD and headed up to the surface. Had no idea what I intended to detect in all this snow, perhaps pennies from Heaven. Wasn't long though before I got my first good signal and started digging. Was working this claim on the divide between the Stanislaus and Mokelumne rivers last "Fall" when winter set in and had to lay over for a spell. Don't know exactly what I have detected here but it appears to have crash landed during one of the big blows. I have included a couple photographs so you will be aware of what is headed downhill with the coming of "Spring". The triangle pictured in the snow is a log cabin roof with access on the opposite gable. The green object in the other photograph hit in the "tin-foil range" but does not taste like metal. I knocked on what appeared to be a tank hatch but got no reply. Just I started to rebury the thing it started to hum the Marine Corps Hymn at which point I returned to the cabin for some push-ups. In what range would a person expect to get for an empty 300 gallon propane tank at depth?
  14. New MGR control box on the way from Nokta/Makro. Thanks Dilek. Merry Christmas & Happy Holidays
  15. I have attempted to contact Makro's online Technical Support Unit but keep getting a " 500-Internal Server Error" and the message fails to transmit. So I just sent Nokta/Makro a PM. See what happens.
×