gold forms in Type II supernova explosions, such as the one that formed the Crab Nebula
Source: NASA Goddard Space Flight Center, Flickr
Gold found in Virginia today was formed originally by the collision of two neutron stars or when the nickel-iron core collapsed in a Type II supernova. All elements in the universe with more than 26 protons in their nucleus (i.e, "heavier" than iron) were created through neutron capture processes.
Protons in the nuclei capture electrons and become a neutron, followed by beta decay where some of the neutrons emit an electron and a neutrino to evolve into new protons. The creation of gold occurs very quickly in what physicists called the r-process for rapid nucleosynthesis, though it is possible some formed in the s-process ("s" for "slow") just before an old star becomes a white dwarf. The heavier-than-iron elements were disseminated into space via cataclysmic events, and then accumulated via gravitational forces into asteroids and ultimately planets.
The gold on earth may have been created by the collision between two neutron stars 80 million years before the formation of our solar system. A neutron star merger within 1,000 light-years of our solar system could have created a high percentage of the heavy elements that coalesced and formed the planets.1
Over the last 4.6 billion years, gold molecules have moved within the mantle and crust. The gold found in Virginia today can be traced back to the time volcanic islands formed in the Iapetus Ocean, before they were accreted to the continental crust and created the supercontinent of Pangea.
In the formation of Pangea, subduction of crust led to melting and differentiation of different minerals within the magma. The gold in what today is Piedmont bedrock separated originally from other minerals in the magma "melt" between the Taconic and Alleghenian orogenies, roughly 400-200 million years ago. As the mass of molten rock slowly cooled below 1,943°F, gold molecules shifted from a liquid to a solid state and "froze" or crystallized in place.
Most of the molten gold crystallized within bedrock while still buried miles underground. Some vaporized gold could have been emitted from volcanoes as fine particles with volcanic ash, and formed placer deposits on the surface of the island or on the Iapetus Ocean seafloor nearby.
Most likely, all the Virginia gold was remelted and moved (remobilized) during the Taconic, Neo-Acadian, and Alleghenian orogenies. Under heat and pressure, the gold originally contained within volcanic islands was squeezed along with silica (quartz) into the veins now scattered within the metamorphosed bedrock of the Virginia Piedmont.
Some veins may be even younger than the Alleghenian orogeny, and date from the time when Pangea split up about 225 million years ago. Triassic basins developed when the crust thinned. Earthquakes were a common occurrence as blocks of crust moved at faults moved. The sediments in the basins tilted and molten basalt at great depth jetted through cracks to the surface. When the pressure of the overlying rock was released briefly during earthquakes, other fluids may also have boiled up towards the surface. When silica cooled back into hard rock, it formed new quartz veins - and in those locations where gold had been a component of the molten fluids at depth, those quartz veins included gold deposits.2
The earliest English settlers of the Virginia Company were looking for gold. Gold equals wealth, at least to humans. The richest man in the history of the world was been the ruler of Mali, Mansa Musa. In the early 1300's, he controlled more wealth than any other human who has ever lived because Mali produced most of Africa's gold. It was the major source of gold for Europe until the discovery of the New World.3
control of gold made Mansa Musa, ruler of Mali, the richest human in the world
Source: Wikipedia, Catalan Atlas
The Spanish seized vast amounts of gold from Aztec, Inca, and other Native American societies in Central and South America. The English started their colonization efforts about a century later, and targeted North America to avoid conflict with existing Spanish settlements. In Virginia and then later colonies, the English did not discover any native societies in North America that had mined and accumulated gold. The gold discovered by the English within Native American communities along the East Coast had been acquired from shipwrecks or exchange with early Spanish and French settlers.
The first gold rush in the United States occurred in North Carolina, nearly two centuries after Jamestown was settled. In 1799, a 12-year old boy found a heavy rock with a yellow color near the site of modern Charlotte. The family used it as a doorstop until 1802, when a North Carolina jeweler bought the rock for $3.50. After he revealed the doorstop was a 17 pound gold nugget, the gold rush began in the western North Carolina Piedmont. Initial mining depleted placer deposits, where gold had accumulated in streambeds. In 1825, miners began digging in the ground to extract gold from lode deposits, where it was mixed with quartz in veins.4
Thomas Jefferson documented the first gold discovered within Virginia:5
That lump of ore would have washed down from its original location in the Piedmont, past the Fall Line at Fredericksburg, before settling with other sediments in a placer deposit on the Coastal Plain. Jefferson's handwritten version of Notes on the State of Virginia suggests he had heard of gold in the Piedmont physiographic province, but he edited out that information about Gold Mine Creek before publication.6
Thomas Jefferson may have been aware of gold in Louisa County, as well as a nugget found downstream of Fredericksburg
Source: Massachusetts Historical Society, Notes on the State of Virginia (p.14)
Gold Mine Creek now flows into Lake Anna
Source: ESRI, ArcGIS Online
Gold was brought to Virginia by colonists, but coins of gold and silver were scarce. There was so little "hard" money that Virginians used tobacco receipts as a form of cash.
the Chesapeake and Ohio Railroad identified where gold might be mined along its route in the Piedmont
Source: Library of Congress, Map showing the economic minerals along the route of the Chesapeake & Ohio Rail Way (Thomas S. Ridgway, 1872)
Various legends claim that General Braddock brought a chest filled with gold in 1755 to Alexandria, before he marched to capture Fort Duquesne from the French. In one legend, the gold was buried along what is known today as Braddock Road near Centreville in Fairfax County, before Braddock's military operation got far from Alexandria on its way to disastrous defeat in Pennsylvania. The coins intended to be used for paying the soldiers were melted and poured into cannon barrels, then buried to lighted the load and prevent wagons from getting stuck in the mud.
Other legends suggest the gold was buried during the hurried return after the defeat on the Monongahela River. To date, treasure hunters have found nothing, while historians debunk the claims.7
The first commercial gold mining in Virginia started in 1804 at Whitehall Mine in Spotsylvania County. It was in the Chopawamsic terrane, an island arc accreted to the North American tectonic plate in Ordovician Period. The veins of quartz and gold were hydrothermal fluids that migrated through other layers of rock during metamorphism, then cooled and crystalized. Miners at Whitehall dug at least one shaft 100 feet deep.8
the Whitehall Mine is located in the Chopawamsic Formation, north of Lake Anna
Source: Mindat.org, Whitehall Mines, Gold-Pyrite Belt, Spotsylvania Co., Virginia, USA
The ore-bearing quartz extracted from lode mines had to be crushed to expose the gold attached to quartz crystals. Pulverizing rock required heavy machinery to grind the ore and expose the crystal surfaces on which gold had been deposited as hydrothermal fluids cooled.
The first stamp mill in Virginia to pound rather than grind the ore was installed in 1836 at the Tellurium mine, the largest of the 50 gold mines that were developed in Goochland County. The stamp mill replaced the original, less-efficient crushing procedures based on how the Spanish had extracted silver in Central and South America sine the 1500's:9
The valuable gold was separated from the non-valuable minerals in the pulverized ore by dissolving it in mercury. The combined gold and mercury "amalgam" was then separated and heated; the mercury boiled off, leaving the gold behind. However, in Virginia's gold-pyrite belt the sulfur-iron pyrite in the bedrock blocked gold crystals from dissolving in the mercury to form an amalgam. As a result, the percentage of gold extracted from the ore was low.
By cooling the vapor when the mercury-gold amalgam was heated, the mercury could also be recovered and reused. The miners wanted to reduce their processing costs. They were less concerned about the environmental impact of excess mercury, which contaminated local creeks and was converted to poisonous methylmercury in fish.
Even today, mercury levels are elevated in creeks downstream from long-closed mining operations. Thosee who pan for gold as a recreational activity today find tiny balls of mercury and amalgam, as well as flakes of gold.
When opponents were fighting construction of a Wal-Mart on the Wilderness Battlefield in Spotsylvania County in 2009, they highlighted the risk of contaminated soil being exposed:10
panning for gold today can result in balls of mercury/amalgam as well as flakes of gold
Source: Gigmaster, The Gold Rush In Virginia I
Lake Anna State Park highlights the history of the Goodwin Gold Mine, which was located within the park. Interpretive panels identify it as the first gold mine in the state was funded by New York investors in 1832, and that 170 mines operated in the gold-pyrite belt. Between 1830-1850, Virginia was the third-largest gold-producing state.
The Goodwin Mine site was identified after placer mining revealed the site. In placer mining, the heavy gold flakes within stream sediments were separated from quartz sand and clay particle by panning, then by the use of sluices. To reach the ore, the source of the gold flakes, Baltimore investors funded the excavation of a shaft in 1881. The shaft eventually was 95 feet deep.11
Over 300 gold mines were developed in Virginia, starting in in Spotsylvania County. Placer (alluvial) gold was scarce by 1830, so mining shifted to digging quartz/gold veins in bedrock. The lode or "hard rock" mines were opened in saprolite in the Piedmont, which was relatively easy to excavate with pick and shovel. At depth, the bedrock which had not decomposed into saprolite had to be blasted with black powder, until dynamite became available after the Civil War.
Mining of lode deposits dropped off after discovery of gold in California. Some producton resumed after the Civil War, but only in small-scale operations. There was a renewal of interest when the Federal government set the price of gold at $35/ounce in 1934, but World War II ended gold mining. According to one description:12
gold miners excavated underground shafts in the gold-pyrite belt east of the Blue Ridge, stretching from Fairfax to Buckingham counties
Source: Gigmaster, Virginia Gold Mine!
In 2014, the Board of County Supervisors in Goochland County approved a proposal to re-open the Moss Mine, which had operated intermittently between 1835-1939. Constant flooding by groundwater had limited the ability to excavate the gold ore through shafts which had been dug as dee as 230 feet underground.
The new proposal was to develop an open pit mine the size of a football field, following a 2-wide gold vein down to 125 feet in depth. Gold would be obtained by "free milling," using water and gravity to physically separate the gold from worthless quartz and other materials without use of cyanide, mercury, or other chemicals. The applicant described the project as a mine clean-up project, and even suggested he might obtain government funding for site reclamation. The soil was contaminated with mercury, which had been used in the past to separate out the gold particles.
Extracting the gold was expected to take just three years. Afterwards, the waste rock would be replaced in the pit, the site would be reclaimed, and a wetland created. The projected $2 million cost for mining might be offset by the gold that would be extracted, but at a minimum the property would be more marketable after removal of the mercury.13
in 2014, Goochland County officials approved re-opening the historic Moss Mine (red X) for gold mining
Source: ESRI, ArcGIS Online
Some of the gold mined in California had an unexpected impact on Virginia just prior to the Civil War.
Captain William Herndon loaded the sidewheel steamer Central America on the Atlantic coast of Panama in September, 1857. Along with the passengers, the ship brought at least three and perhaps twenty tons of California gold, including coins from the San Francisco mint. The journey to New York was interrupted by a hurricane, and the ship sank 200 miles east of Charleston, South Carolina.
Though 153 were rescued, 425 passengers and crew died. All the gold sank 8,000 feet underwater to the Blake Plateau. In the 1800's, the loss of the Central America was as famous as the sinking of the Titanic is today. The Town of Herndon in Fairfax County honors the captain who heroically tried to offload his passengers before going down with his ship.14
The shipwreck exacerbated the Panic of 1857, an economic recession triggered by the inability of banks to provide specie (gold/silver) when demanded by the holders of paper bank notes. The Manassas Gap Railroad had to suspend construction of its Independent Line. The railroad embankment became a key feature on the Civil War battlefield of Second Manassas in August, 1862.15
Three tons of gold from the Central America were recovered in 1988. Treasure hunters discovered where "the bottom was carpeted with gold. Gold everywhere, like a garden..." and brought it back to Norfolk, where many of the people rescued from the ship had come ashore in 1857. Multiple lawsuits over rights to the salvaged gold were resolved in the Eastern District of Virginia court. However, the key person in the treasure hunt was accused of selling the recovered gold without paying the investors. He was jailed in 2014 but refused to talk, and the gold from the S.S. Central America disappeared for a second time.16
An unuccessful treasure hunt continues for gold supposedly brought to Bedford County in 1819-21. According to the tale, Thomas Jefferson Beale led a party of hunters from Bedford County to a spot 300 miles north of Sante Fe, New Mexico, near modern-day Denver. There they discovered a lode of gold and silver, and somehow mined and smelted the ore.
Beale and his fellow hunters brought their treasure back to Buford's Tavern (now Montvale) in two wagon trains and buried it in a rock-lined underground vault. The first one in 1819 included 1,014 pounds of gold and 3,812 pounds of silver. Another wagon train in 1821 brought 1,907 pounds of gold and 1,288 pounds of silver.
Beale left a strongbox with a tavern keeper, went back across the Mississippi River in 1822, and never returned. A letter mailed from St. Louis told the tavern keeper to expect another letter in 1832, with a key to interpreting what was inside the strongbox.
No letter arrived in 1832. When the tavern keeper finally opened the box, he found letters to him plus three papers with numbers based on an unknown code. Text on one paper was deciphered, after code breakers realized the numbers were a substitution code based on the Declaration of Independence. The deciphered page revealed that the other two coded documents included instructions on finding where the Beale Hoard was buried in Bedford County, and the names of the 30 people who were part of the party and their next of kin.
A pamphlet published in 1885 publicized the story of the Beale Treasure. Since then, efforts to decode the two other enciphered papers and find the treasure have provided entertainment and created multiple holes in Bedford County.
Perhaps the treasure really is buried at the current site of Johnson's Orchard and Peaks of Otter Winery, but no gold supposedly hauled back from Colorado has been found in Virginia. However, the Johnsons have used the claim in their marketing:17
gold veins are concentrated in the Piedmont, in terranes accreted onto the North American Plate in the Taconic and Neo-Acadian orogenies
Source: City of Fredericksburg, Historic Resources Along The Rappahannock And Rapidan Rivers (p.46)
panning for gold in the Piedmont will result in one or more flakes, but is a recreational rather than commercial activity today
Source: Gigmaster, The Gold Rush In Virginia I