{"id":3629,"date":"2015-02-03T08:00:35","date_gmt":"2015-02-03T13:00:35","guid":{"rendered":"http:\/\/admin.acceleratingscience.com\/?p=3629"},"modified":"2026-08-19T13:18:42","modified_gmt":"2026-08-19T13:18:42","slug":"gold-mining-past-and-present-what-does-the-future-hold","status":"publish","type":"post","link":"https:\/\/www.thermofisher.com\/blog\/mining\/gold-mining-past-and-present-what-does-the-future-hold\/","title":{"rendered":"Gold Mining, Past and Present: What Does the Future Hold?"},"content":{"rendered":"

\"GoldThe United States emerged as a major economic power following the Gold Rush of 1849, during which miners extracted more than 750,000 pounds of gold,\u00a0according to History.com<\/a>. In those days, gold was uncovered by manual labor with a pick and shovel, a risky and dangerous proposition with uncertain profit even with a seemingly abundant supply. By 1853, hydraulic mining emerged, largely replacing independent miners. Today, gold is extracted from large scale open pit or underground mines.<\/p>\n

In 2013, U.S. gold mine production <\/a>was estimated at 227 tons and world total mine production was approximately 2,770 tons. However, the days of history-changing discoveries such as those that sparked the California Gold Rush are gone.<\/p>\n

While automation and other modern technologies — like portable x-ray fluorescence (XRF) analyzers<\/a> and cross-belt elemental analyzers<\/a> —\u00a0have significantly improved the speed, productivity, and safety of mining operations, gold remains difficult to find because it\u2019s relatively scarce in the earth and occurs in a variety of rocks and geological environments.<\/p>\n

The two primary types of gold deposits are lode (primary) deposits and placer (secondary) deposits. Gold<\/a>, a report published by the U.S. Geological Survey, describes the main hypotheses geologists have proposed to explain the source of lode deposits.<\/p>\n

    \n
  1. One popular hypothesis proposes that many gold deposits, especially those found in volcanic and sedimentary rocks, formed from circulating ground waters driven by heat from bodies of magma about 2 to 5 miles of the surface.<\/li>\n
  2. Another theory suggests that gold-bearing solutions may be expelled from magma as it cools, precipitating ore materials as they move into cooler surrounding rocks. This hypothesis is applied to gold deposits located in or near masses of granitic rock, which represent solidified magma.<\/li>\n
  3. A third hypothesis suggests that ore metals originate from sedimentary and volcanic rocks undergoing active metamorphism due to high temperatures and pressures.<\/li>\n<\/ol>\n

    Typical prospecting involves examining samples throughout the mine site to determine if the region is worth exploring. Gold occurs in very small concentrations, so it\u2019s easy to miss. If gold is found, substantial capital investment is required to uncover these elusive deposits.<\/p>\n

    The last two years have added another layer of challenges: The declining price of gold is having a ripple effect in financing, exploration, and drilling decisions. With less money available, fewer exploration projects are being pursued. When deposits are located, few of them have large enough concentrations to be financially worthwhile.<\/p>\n

    Discoveries that actually do become mines can take up to two decades to come online and may require more expensive mining techniques. Efficient and cost effective practices are more important than ever.<\/p>\n

    To enhance their chances of finding gold, geologists may use geophysical methods to measure variations in the physical properties of rocks that may indicate the presence of gold, such as density, magnetism, electrical conductivity, or natural radioactivity. Although these geophysical methods can be crucial for gold exploration, geochemical methods \u2013 including portable\u00a0x-ray florescence<\/a>\u00a0(XRF) \u2013 are the only methods that can measure concentrations of gold and other associated elements. Today, portable XRF is used in various stages of gold exploration and mining including grass-root exploration using pathfinder elements<\/a>, finding source of gold in stream sediments, core logging, identification of lithologies, and even grade control.<\/p>\n

    Read An Uncertain Future for Gold?<\/a> to learn about other important issues, and potential solutions, influencing the mining industry.<\/p>\n","protected":false},"excerpt":{"rendered":"

    The United States emerged as a major economic power following the Gold Rush of 1849, during which miners extracted more than 750,000 pounds of gold,\u00a0according to History.com. In those days, gold was uncovered by manual labor with a pick and shovel, a risky and dangerous proposition with uncertain profit even with a seemingly abundant supply.<\/p>\n","protected":false},"author":41,"featured_media":3732,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"_kad_blocks_custom_css":"","_kad_blocks_head_custom_js":"","_kad_blocks_body_custom_js":"","_kad_blocks_footer_custom_js":"","_monsterinsights_skip_tracking":false,"_genesis_hide_title":false,"_genesis_hide_breadcrumbs":false,"_genesis_hide_singular_image":false,"_genesis_hide_footer_widgets":false,"_genesis_custom_body_class":"","_genesis_custom_post_class":"","_genesis_layout":"","_jetpack_newsletter_access":"","_jetpack_dont_email_post_to_subs":false,"_jetpack_newsletter_tier_id":0,"_jetpack_memberships_contains_paywalled_content":false,"_jetpack_memberships_contains_paid_content":false,"footnotes":""},"categories":[225],"tags":[],"division":[],"class_list":{"0":"post-3629","1":"post","2":"type-post","3":"status-publish","4":"format-standard","5":"has-post-thumbnail","7":"category-general","8":"entry"},"_selected_authors":[1199],"_selected_reviewers":[],"acf":[],"yoast_head":"\nGold 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Some have been around for quite awhile, but are still as relevant as ever. If you missed any of the latest articles, just click\u00a0here\u00a0to see the most recently published articles. You can even filter by\u2026","rel":"","context":"In "General\/Industry"","block_context":{"text":"General\/Industry","link":"https:\/\/admin.acceleratingscience.com\/mining\/general-industry-mining\/"},"img":{"alt_text":"Top 10, words, isolated on a dark blue background. Alphabet on stone blocks.Rating. Rating concept. 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Energy Dispersive X-ray Fluorescence (EDXRF) spectrometers play a vital role by providing fast, non-destructive elemental analysis of ores, concentrates, and intermediate products. This enables mining operations to optimize extraction efficiency, maintain quality assurance, and meet stringent industry\u2026","rel":"","context":"In "Elemental\/Geochemical Analysis"","block_context":{"text":"Elemental\/Geochemical Analysis","link":"https:\/\/admin.acceleratingscience.com\/mining\/elemental-geochemical-analysis\/"},"img":{"alt_text":"a rock showing signs of copper and gold.","src":"https:\/\/i0.wp.com\/admin.acceleratingscience.com\/mining\/wp-content\/uploads\/sites\/3\/2025\/10\/iStock-1309478061.jpg?resize=350%2C200&ssl=1","width":350,"height":200,"srcset":"https:\/\/i0.wp.com\/admin.acceleratingscience.com\/mining\/wp-content\/uploads\/sites\/3\/2025\/10\/iStock-1309478061.jpg?resize=350%2C200&ssl=1 1x, https:\/\/i0.wp.com\/admin.acceleratingscience.com\/mining\/wp-content\/uploads\/sites\/3\/2025\/10\/iStock-1309478061.jpg?resize=525%2C300&ssl=1 1.5x, https:\/\/i0.wp.com\/admin.acceleratingscience.com\/mining\/wp-content\/uploads\/sites\/3\/2025\/10\/iStock-1309478061.jpg?resize=700%2C400&ssl=1 2x, https:\/\/i0.wp.com\/admin.acceleratingscience.com\/mining\/wp-content\/uploads\/sites\/3\/2025\/10\/iStock-1309478061.jpg?resize=1050%2C600&ssl=1 3x, https:\/\/i0.wp.com\/admin.acceleratingscience.com\/mining\/wp-content\/uploads\/sites\/3\/2025\/10\/iStock-1309478061.jpg?resize=1400%2C800&ssl=1 4x"},"classes":[]},{"id":2707,"url":"https:\/\/www.thermofisher.com\/blog\/mining\/potash-a-look-at-the-worlds-most-popular-fertilizer\/","url_meta":{"origin":3629,"position":2},"title":"Potash: A Look at the World\u2019s Most Popular Fertilizer","author":"Ali Somarin","date":"April 8, 2026","format":false,"excerpt":"Potash Explained Potash is one of the most essential fertilizers in modern agriculture, supplying potassium\u2014an irreplaceable nutrient that supports plant growth, crop yield, and overall food production. According to the U.S. Geological Survey (USGS), about 85% of potash is used in fertilizers, underscoring its critical role in global farming systems.\u2026","rel":"","context":"In "Data Management\/Lab Automation"","block_context":{"text":"Data Management\/Lab Automation","link":"https:\/\/admin.acceleratingscience.com\/mining\/data-management-lab-automation\/"},"img":{"alt_text":"potash evaporation ponds at mining site","src":"https:\/\/i0.wp.com\/admin.acceleratingscience.com\/mining\/wp-content\/uploads\/sites\/3\/2014\/06\/iStock-1362567340.jpg?resize=350%2C200&ssl=1","width":350,"height":200,"srcset":"https:\/\/i0.wp.com\/admin.acceleratingscience.com\/mining\/wp-content\/uploads\/sites\/3\/2014\/06\/iStock-1362567340.jpg?resize=350%2C200&ssl=1 1x, https:\/\/i0.wp.com\/admin.acceleratingscience.com\/mining\/wp-content\/uploads\/sites\/3\/2014\/06\/iStock-1362567340.jpg?resize=525%2C300&ssl=1 1.5x, https:\/\/i0.wp.com\/admin.acceleratingscience.com\/mining\/wp-content\/uploads\/sites\/3\/2014\/06\/iStock-1362567340.jpg?resize=700%2C400&ssl=1 2x, https:\/\/i0.wp.com\/admin.acceleratingscience.com\/mining\/wp-content\/uploads\/sites\/3\/2014\/06\/iStock-1362567340.jpg?resize=1050%2C600&ssl=1 3x, https:\/\/i0.wp.com\/admin.acceleratingscience.com\/mining\/wp-content\/uploads\/sites\/3\/2014\/06\/iStock-1362567340.jpg?resize=1400%2C800&ssl=1 4x"},"classes":[]},{"id":1624,"url":"https:\/\/www.thermofisher.com\/blog\/mining\/a-halloween-treat-free-periodic-table\/","url_meta":{"origin":3629,"position":3},"title":"A Halloween Treat – Free Periodic Table","author":"Marlene Gasdia-Cochrane","date":"October 30, 2025","format":false,"excerpt":"No tricks here. Download this handy periodic table and X-ray energy reference guide to help in analyzing your mining samples. \u00a0It's our treat. Then visit our Mining and Minerals, Cement Production, and Coal Power pages for more goodies. Download Periodic Table.\u00a0 \u00a0","rel":"","context":"In "Elemental\/Geochemical Analysis"","block_context":{"text":"Elemental\/Geochemical Analysis","link":"https:\/\/admin.acceleratingscience.com\/mining\/elemental-geochemical-analysis\/"},"img":{"alt_text":"halloween scene with plastic pumpkin and candy","src":"https:\/\/i0.wp.com\/admin.acceleratingscience.com\/mining\/wp-content\/uploads\/sites\/3\/2025\/10\/No-Tricks-.jpg?resize=350%2C200&ssl=1","width":350,"height":200,"srcset":"https:\/\/i0.wp.com\/admin.acceleratingscience.com\/mining\/wp-content\/uploads\/sites\/3\/2025\/10\/No-Tricks-.jpg?resize=350%2C200&ssl=1 1x, https:\/\/i0.wp.com\/admin.acceleratingscience.com\/mining\/wp-content\/uploads\/sites\/3\/2025\/10\/No-Tricks-.jpg?resize=525%2C300&ssl=1 1.5x, https:\/\/i0.wp.com\/admin.acceleratingscience.com\/mining\/wp-content\/uploads\/sites\/3\/2025\/10\/No-Tricks-.jpg?resize=700%2C400&ssl=1 2x, https:\/\/i0.wp.com\/admin.acceleratingscience.com\/mining\/wp-content\/uploads\/sites\/3\/2025\/10\/No-Tricks-.jpg?resize=1050%2C600&ssl=1 3x"},"classes":[]},{"id":14123,"url":"https:\/\/www.thermofisher.com\/blog\/mining\/why-coal-chemistry-matters-in-coal-fired-power-generation\/","url_meta":{"origin":3629,"position":4},"title":"Why Coal Chemistry Matters in Coal-Fired Power Generation\u00a0","author":"Marlene Gasdia-Cochrane","date":"July 28, 2026","format":false,"excerpt":"Summary For coal manufacturers, product quality extends far beyond tonnage and\u00a0logistics. The chemical characteristics of coal directly influence power plant efficiency, emissions performance, maintenance requirements, and overall operating costs. As utilities continue to focus on fuel optimization and regulatory compliance, understanding coal chemistry has become essential for suppliers\u00a0seeking\u00a0to deliver value\u2026","rel":"","context":"In "Coal"","block_context":{"text":"Coal","link":"https:\/\/admin.acceleratingscience.com\/mining\/coal\/"},"img":{"alt_text":"Stone coal lump in scientist hand","src":"https:\/\/i0.wp.com\/admin.acceleratingscience.com\/mining\/wp-content\/uploads\/sites\/3\/2026\/07\/iStock-1371922462_coallab.jpg?resize=350%2C200&ssl=1","width":350,"height":200,"srcset":"https:\/\/i0.wp.com\/admin.acceleratingscience.com\/mining\/wp-content\/uploads\/sites\/3\/2026\/07\/iStock-1371922462_coallab.jpg?resize=350%2C200&ssl=1 1x, https:\/\/i0.wp.com\/admin.acceleratingscience.com\/mining\/wp-content\/uploads\/sites\/3\/2026\/07\/iStock-1371922462_coallab.jpg?resize=525%2C300&ssl=1 1.5x, https:\/\/i0.wp.com\/admin.acceleratingscience.com\/mining\/wp-content\/uploads\/sites\/3\/2026\/07\/iStock-1371922462_coallab.jpg?resize=700%2C400&ssl=1 2x, https:\/\/i0.wp.com\/admin.acceleratingscience.com\/mining\/wp-content\/uploads\/sites\/3\/2026\/07\/iStock-1371922462_coallab.jpg?resize=1050%2C600&ssl=1 3x, https:\/\/i0.wp.com\/admin.acceleratingscience.com\/mining\/wp-content\/uploads\/sites\/3\/2026\/07\/iStock-1371922462_coallab.jpg?resize=1400%2C800&ssl=1 4x"},"classes":[]},{"id":13977,"url":"https:\/\/www.thermofisher.com\/blog\/mining\/what-is-in-situ-geochemical-analysis-and-why-it-is-critical-for-modern-field-operations\/","url_meta":{"origin":3629,"position":5},"title":"What Is In Situ Geochemical Analysis \u2014 And Why It Is Critical for Modern Field Operations","author":"Marlene Gasdia-Cochrane","date":"March 13, 2026","format":false,"excerpt":"In situ geochemical analysis has become a cornerstone of modern mineral exploration, mining, and environmental fieldwork. As project timelines tighten and operational costs increase, organizations can no longer afford delays caused by traditional laboratory testing workflows. In situ analysis \u2014 the ability to measure elemental composition directly at the sampling\u2026","rel":"","context":"In "Exploration"","block_context":{"text":"Exploration","link":"https:\/\/admin.acceleratingscience.com\/mining\/exploration\/"},"img":{"alt_text":"Close up of industrial worker holding mineral ore in gloved hands on mining site","src":"https:\/\/i0.wp.com\/admin.acceleratingscience.com\/mining\/wp-content\/uploads\/sites\/3\/2026\/03\/iStock-896157842.jpg?resize=350%2C200&ssl=1","width":350,"height":200,"srcset":"https:\/\/i0.wp.com\/admin.acceleratingscience.com\/mining\/wp-content\/uploads\/sites\/3\/2026\/03\/iStock-896157842.jpg?resize=350%2C200&ssl=1 1x, https:\/\/i0.wp.com\/admin.acceleratingscience.com\/mining\/wp-content\/uploads\/sites\/3\/2026\/03\/iStock-896157842.jpg?resize=525%2C300&ssl=1 1.5x, https:\/\/i0.wp.com\/admin.acceleratingscience.com\/mining\/wp-content\/uploads\/sites\/3\/2026\/03\/iStock-896157842.jpg?resize=700%2C400&ssl=1 2x, https:\/\/i0.wp.com\/admin.acceleratingscience.com\/mining\/wp-content\/uploads\/sites\/3\/2026\/03\/iStock-896157842.jpg?resize=1050%2C600&ssl=1 3x, https:\/\/i0.wp.com\/admin.acceleratingscience.com\/mining\/wp-content\/uploads\/sites\/3\/2026\/03\/iStock-896157842.jpg?resize=1400%2C800&ssl=1 4x"},"classes":[]}],"jetpack_sharing_enabled":true,"jetpack_featured_media_url":"https:\/\/admin.acceleratingscience.com\/mining\/wp-content\/uploads\/sites\/3\/2015\/02\/istock_000022019466_medium.jpg","_links":{"self":[{"href":"https:\/\/www.thermofisher.com\/blog\/mining\/wp-json\/wp\/v2\/posts\/3629","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.thermofisher.com\/blog\/mining\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.thermofisher.com\/blog\/mining\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.thermofisher.com\/blog\/mining\/wp-json\/wp\/v2\/users\/41"}],"replies":[{"embeddable":true,"href":"https:\/\/www.thermofisher.com\/blog\/mining\/wp-json\/wp\/v2\/comments?post=3629"}],"version-history":[{"count":1,"href":"https:\/\/www.thermofisher.com\/blog\/mining\/wp-json\/wp\/v2\/posts\/3629\/revisions"}],"predecessor-version":[{"id":14133,"href":"https:\/\/www.thermofisher.com\/blog\/mining\/wp-json\/wp\/v2\/posts\/3629\/revisions\/14133"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/www.thermofisher.com\/blog\/mining\/wp-json\/wp\/v2\/media\/3732"}],"wp:attachment":[{"href":"https:\/\/www.thermofisher.com\/blog\/mining\/wp-json\/wp\/v2\/media?parent=3629"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.thermofisher.com\/blog\/mining\/wp-json\/wp\/v2\/categories?post=3629"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.thermofisher.com\/blog\/mining\/wp-json\/wp\/v2\/tags?post=3629"},{"taxonomy":"division","embeddable":true,"href":"https:\/\/www.thermofisher.com\/blog\/mining\/wp-json\/wp\/v2\/division?post=3629"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}