Utah Gold – History, Placers, and Recreational Regulations
Lode and Placer Deposits
Geologic processes concentrate gold into two principal types of deposits: lode (or primary) deposits where gold is deposited by gold-bearing solutions within rock formations; and, placer (or secondary) deposits where gold-bearing rocks are eroded and the free gold is concentrated in stream beds. Most prospectors began their search for gold by looking for placer deposits because they offered quick returns with simple equipment. The discovery of placer deposits often led to the discovery of lode deposits. In Utah, primary gold deposits have proved to be more economical than placer deposits.
In 1847, the primary influx of Utah pioneers, Mormon settlers (members of the Church of Jesus Christ of Latter-day Saints), arrived in Salt Lake Valley. Unlike settlers in other western states who prospected for precious metals, early Utahns concentrated on farming, raising livestock, and establishing communities, and only mined materials necessary for home industries such as salt, coal, lead, and sulfur. Therefore, it wasn’t until 1858 that a gold discovery was reported. Westbound travelers on their way to California found gold at Gold Hill in Tooele County. Native Americans initially drove away prospectors, discouraging any mining in the area. Prospectors were persistent, however, and in 1869, the Clifton (Gold Hill) district was organized. Small amounts of gold, silver, and lead were produced over the next few years. Mining activity and production increased in 1892, when a mill was constructed to treat the ores.
General Patrick E. Connor, stationed with his regiment at Camp Douglas in the foothills east of Salt Lake City, and others formally organized the first mining district, West Mountain (currently Bingham) in 1863, after the discovery of lead-silver ore in Bingham Canyon in the Oquirrh Mountains of Salt Lake County. Placer gold was discovered in Bingham Canyon the following year. These placers were the largest and most productive ever discovered in Utah, yielding about $1.5 million in gold. However, they were practically depleted by 1900.
A gold placer in the Mercur (previously Camp Floyd) district in Tooele County was discovered in 1870. A few prospectors staked claims but soon abandoned their endeavors due to the scarcity of both water and gold that could be panned. Silver ores kept the district alive until around 1880. About 1883, gold-bearing ores were found, but the gold could not be separated from the rock. Disappointed, prospectors again left the district. Then, in 1889, these ores were rediscovered and the gold successfully recovered using the newly developed cyanide leaching process. From 1890 to 1900, almost 2 million tons of gold ore were treated, producing over 380,000 ounces of gold worth about $8 million.
In the 1880s, Bluff residents intermittently prospected the San Juan River and its tributaries. In 1892, exaggerated tales of the area’s fabulously rich river placers and sandstone terraces spread like wildfire throughout the West. A stampede of 1,200 prospectors followed, creating the “Bluff excitement” in the winter of 1892-93. After enduring hardships, much fighting, and some bloodshed, the prospectors discovered that the gold was very fine grained, making recovery difficult, and in a few months the area was practically abandoned.
In the late 1800s and early 1900s, gold placer mining was conducted in the Tushar, Henry, La Sal, and Abajo Mountains and along the Colorado, San Juan, and Green Rivers and their tributaries. Early gold-producing districts, some mining gold as a by-product of other metals, included Tintic, Bingham, Mercur, Park City, Gold Mountain, Gold Springs, State Line, Clifton, Park Valley, Spring Creek, American Fork, and San Francisco.
During these early years of discovery, thousands of claims were filed and many mines started. Eventually most of these were either mined out and abandoned, or were consolidated and worked by large mining companies.
Gold production declined and many gold mines closed during World War I (1914-1918) due to a shortage of manpower, decreasing ore reserves, and increasing costs. During the depression in the early 1930s, gold mines were brought back to life and prospectors thoroughly searched the known and little-known gold-producing areas. Gold production increased rapidly when the government-regulated price of gold was raised in 1934 from $20.67 to $35.00 per ounce. This interval of increased productivity ended during World War II when gold mines were closed in 1942 by the War Production Board and were not permitted to reopen until the war ended. By-product gold, such as the gold recovered with the copper ores in the Bingham mining district, accounted for most of the gold produced during the war.
After the war, some gold mines remained closed due to the fixed selling price and rising operation costs. The active Utah gold-producing areas at this time included the Bingham, Cottonwood (Big & Little), East Tintic, Gold Mountain, Mt. Baldy, Ophir-Rush Valley, Park City, Tintic, and Willow Springs districts, and the Notch Peak (in the House Range) and La Sal Mountain placers, although some only operated intermittently or produced small amounts.
In 1968, gold’s fixed price of $35 per ounce as a commodity was terminated and its price increased, reaching more than $1800 per ounce in 2011. From 1982 to 2005 the price remained in the range of $250 to $500 per ounce. Since then it has ranged from $600 to $1800 per ounce.
Major gold developments in the 1980s and 1990s included operations in the Bingham, Mercur, Goldstrike, Tintic, and East Tintic mining districts. Exploration and development continues in Utah today. Old mining districts are being re-explored and in some cases, revived using new technologies.
Utah’s Gold Placers
What is a placer?
A placer is a sand or gravel deposit, such as a beach or stream bed, containing concentrations of heavy minerals like gold. Gold is very resistant to weathering. As a rock containing gold is eroded, the gold is freed and carried downstream as dust, flakes, grains, and nuggets. During high-flow periods when the sand and rocks in the steam are moving, gold settles downward and concentrates at the base of the stream bed or in depressions in sand and gravel bars where the current is slower. Most of the placer gold in Utah is very fine grained (flour gold) and is difficult to recover.
Where are Utah’s gold placers?
Utah’s placers are usually associated with areas of igneous rocks. Gold-bearing solutions deposited gold within the surrounding rock formations (lode or primary deposit). As these gold-bearing rocks are eroded, the free gold is deposited and concentrated into placer (or secondary) deposits. Finding gold is possible in any stream or river that crosses a gold-mineralized area. However, since the known placer deposits have been worked and reworked for over 100 years, the chance of finding large concentrations of gold in Utah’s streams is small.
Utah placers have been reported in the following areas:
- Abajo Mountains – Along Johnson and Recapture Creeks.
- Oquirrh Mountains, Bingham Canyon – Was the largest gold placer in Utah. The original topography has been altered by the open-pit mining operations.
- Colorado River – From the mouth of the Dolores River south to the Amasa Back bend west of Moab. Most placers were from the Dirty Devil River south to the Utah-Arizona border and are now under Lake Powell.
- Green River – From Flaming Gorge Reservoir down to Horseshoe Bend.
- Henry Mountains – On the east flanks of Mt. Ellen in Crescent Creek and Mt. Pennell along Straight Creek.
- House Range – In Amasa Valley and Miller Canyon.
- La Sal Mountains – In glacial deposits and streams of Miners Basin, Wilson Mesa, Bald Mesa, and around North Mountain.
- San Juan River – From the mouth of Montezuma Creek west to Lake Powell.
- Tushar Mountains – In Mill Creek on the north flank of Signal Peak and near the mouth of Pine Gulch Creek in Bullion Canyon.
“Gold, I found gold!,” you shout to your friends. You quickly imagine all the things you are going to do with your newfound wealth. Then reality sets in, and you are embarrassed to discover that you have been tricked by the mineral pyrite, also known as fool’s gold. Take heart, you are not the first person (nor the last) to be fooled by pyrite. Even Captain John Smith (of Pocahontas fame) mistakenly sent an entire shipload of pyrite to London in the early 1600s, while exploring the Chickahominy River for a waterway to the Pacific.
How can I tell the difference between gold and pyrite (fool’s gold)?
Visual clues –
- Color: Gold and pyrite both have a brilliant metallic luster, but are different tones of yellow. Gold is golden to silvery yellow, whereas pyrite is a pale to medium brassy yellow that sometimes tarnishes.
- Shape: Gold usually occurs in nuggets or very small flakes, sheets, and shapeless grains. Small cubic and octahedral (two pyramids with bases joined) gold crystals are very rare. Pyrite crystals commonly form cubes, octahedrons, or pyritohedrons (twelve irregular, pentagonal or five-sided faces), frequently with striations (parallel lines) on the crystal faces. Pyrite can also occur as shapeless grains.
Physical tests –
- Hardness: Scratch the mineral with the blade of a pocket knife. Rub off any loose powder to see if the mineral has been scratched. Gold is much softer than pyrite and can be cut. Pyrite cannot be scratched. (Beware – chalcopyrite looks similar to pyrite, but is softer and can be scratched with a knife. It is a very brassy yellow, often with a bronze or iridescent tarnish.)
- Odor: Rub the mineral vigorously with a hard object. Gold has no odor, but pyrite gives off a sulphurous smell (like rotten eggs).
- Malleable: Strike the mineral with a steel hammer. Gold will flatten or change shape without breaking. Pyrite will give off sparks.
Good luck in your quest for gold and don’t be fooled by fool’s gold!
Recreational Gold Panning and Dredging Regulations
Recreational Panning* – using non-mechanized equipment such as a pan, sluice box, or pick and shovel that does not disturb the earth above the water line or outside a dry stream bed.
Recreational Dredging* – using a vacuum or suction dredge with an intake diameter of up to four inches and having a rating of up to twelve horse power or using hand-operated sluice equipment and related tools. Dredging must occur beneath the existing water surface or upon non-vegetated sand and gravel bars within the active stream channel for a period not to exceed 45 days annually.
*from U.S. Bureau of Land Management and Utah Division of Water Rights information.
School and Institutional Trust Lands Administration, 675 East 500 South, Suite 500, Salt Lake City, UT 84102, 801.538.5100; Internet: https://trustlands.utah.gov. Mineral lease information.
U.S. Bureau of Land Management, 440 West 200 South, Suite 500, Salt Lake City, UT 84101, 801.539.4001, email: firstname.lastname@example.org; Internet: https://www.blm.gov. Updated prospecting regulations and permits; land ownership information.
U.S. Forest Service, 324 25th Street, Ogden, UT 84401, 801-625-5605; or contact any local District Ranger; Internet: https://www.fs.usda.gov/r4. Updated prospecting regulations.
U.S. Geological Survey, Internet: https://www.usgs.gov. Topographic maps and geologic maps and publications.
Utah Division of Oil, Gas and Mining, 1594 West North Temple, P.O. Box 145801, Salt Lake City, UT 84114-5801, 801.538.5340; Internet: https://www.ogm.utah.gov. Mining permits and information.
Utah Division of Water Rights, 1594 West North Temple, P.O. Box 146300, Salt Lake City, UT 84114-6300, 801.538.7240; Internet: https://waterrights.utah.gov. Updated stream prospecting regulations and permits; open stream listing.
Utah Geological Survey, 1594 West North Temple, P.O. Box 146100, Salt Lake City, UT 84114-6100, 801.537.3300, Map & Bookstore 801.537.3320, 1-888-UTAHMAP; Internet: https://geology.utah.gov, Map & Bookstore https://www.utahmapstore.com. Bookstore and library with maps and publications on Utah geology, mining, and rockhounding.
Utah Geological Survey (UGS)
Mines and prospects containing gold in Utah, UGS Open-file Report 207, 28 p., 2 maps, scale 1:750,000, 1991. Contains listing of 730 inactive mines and prospects that produced or contained gold. Locations, production and reserve data are given for the six active mines. Two statewide maps show mines and prospects that produced gold as (a) a primary product and (b) a by-product. Tables list mine or prospect, commodities present, size of mine, and any known production data.
Gold placers in Utah – a compilation, UGS Circular 47, 29 p., 1966. Compilation from USGS bulletins and professional papers. Defines and lists depositional origins, then discusses most of the major districts where placers occur.
Provisional geologic map of the Gold Hill quadrangle, Tooele County, Utah, with a plate of the mines, prospects and workings of the Gold Hill quadrangle, UGS Map 140, 19 p., 3 plates, 1:24,000, 1993. Covers the main part of the Gold Hill mining district.
Mineralization in the Gold Hill mining district, Tooele County, Utah, UGS Bulletin 83, 37 p., 1970. One of the oldest mining sites in the state. Evaluates the area using alteration patterns and determines that, for 1970, commercial production is uneconomical.
Geologic map of the Gold Bar Canyon quadrangle, Grand County, Utah, UGS Map 155, 26 p., 2 plates, 1:24,000, 1994. Covers the Amasa Back bend area of the Colorado River.
Rocks & Minerals Utah Special, reprint, UGS Public Information Series #26, 62 p., 1994. This colorful magazine has several articles on gold-mining areas of Utah including Park City, the Tintic District, and Bingham copper mine.
Gold occurrence in the Cretaceous Mancos Shale, eastern Utah, UGS Contract Report 91-5, 21 p., 1991. Persistent rumors of high-grade gold mineralization throughout the section have been reported for years. This publication evaluates these reports and concludes that it is unlikely that gold exists in commercially extractable quantities.
Skarn occurrences in Utah and the potential for associated gold mineralization, UGS Contract Report 91-13, 29 p. plus 20 p. appendix, 1991. Thirty-four of the 146 skarn occurrences in Utah contain greater than 0.01 opt (0.34 ppm) gold and are classified as gold-bearing. Skarns in which gold is a primary or secondary commodity occur in the Bingham and Gold Hill mining districts. The presence of gold in minor to ore-grade concentrations in numerous Utah skarns favors additional discoveries of gold in the skarn environment.
Minerals and mineral localities of Utah, UGS Bulletin 117, 117 p., 1981. Contains alphabetical listings of: 1) mining districts; 2) mining districts, mines, and mineral localities with the minerals found, by county; and 3) a brief description of the 706 minerals found in Utah and their occurrences. An appendix has alphabetical listings of minerals grouped by: a) minerals of the state; b) minerals by each county; c) crystal system; d) chemical class; e) selected minerals of the state; and f) selected metallic minerals of each county.
Geochemical reconnaissance at Mercur, Utah, UGS Special Study 43, 16 p., 1973. A geochemical reconnaissance was conducted in the abandoned Mercur (Camp Floyd) mining district in the south Oquirrh Mountains to determine the average amount of gold and silver remaining in the district and to locate possible prospects.
Characteristics of acid-sulfate alteration in the Marysvale-Pioche mineral belt: a guide to gold mineralization, UGS Miscellaneous Publication 91-2, 29 p., 1991.These acid-sulfate occurrences were investigated and assessed for their relative gold potential. Work included mapping, geochemistry, petrography, and literature review.
Field guide to geologic excursions in Utah and adjacent areas of Nevada, Idaho, and Wyoming, UGS Miscellaneous Publication 92-3, 481 p., 1992. Several papers in this field guide are on gold, including the Oquirrh Mountain, Barneys Canyon, and Mercur deposits.
Selected mining districts of Utah, UGS Miscellaneous Publication 05-5, 59 p., 2005. Guide to Utah’s mining districts containing information on location, production, history, geology, mineralogy, and current/future operations.
U.S. Geological Survey (USGS)
Principal gold-producing districts of the United States, USGS Professional Paper 610, 283 p., 1968. Information on the discovery, history of development, production, and geology of more than 500 gold-producing districts in the United States.
Placer gold deposits of Utah, USGS Bulletin 1357, 26 p., 1 pl., 1:1,000,000, 1973.Describes eighteen placer districts with map coverage, accessibility, extent, production history, gold source, and references for each location.
Prospecting for gold in the United States, USGS General Interest Publication, 19 p., 1986. General information on gold prospecting and placer and lode deposits.
Gold, USGS General Interest Publication, 23 p., 1993. General gold information and history of gold exploration.
Suggestions for prospecting, USGS General Interest Publication, 24 p., 1991.Information on prospecting techniques, geochemical and geophysical prospecting, mining claims, and prospector services.