Ghana gold deposits fall into three families. Most of the gold sits in quartz veins and sulphide zones along shear corridors in the Birimian greenstone belts, with Obuasi as the classic example. The second family is gold in ancient river conglomerates of the Tarkwaian Group around Tarkwa, Damang and Iduapriem. The third, smaller but growing, is gold hosted in granites. Ghana was Africa’s leading gold producer in 2019, and the USGS estimated its 2025 output at 150 tonnes.

Try it: Tarkwaian reef gold estimator: tonnes and ounces in a conglomerate sheet →

This guide is for licence holders, explorers and investors. It replaces an older page on this address that reported one company’s drilling results; here we cover the geology of gold deposits in Ghana as a whole. Sources include a peer-reviewed review of Ghana’s Birimian and Tarkwaian gold deposits by Smith, Henry and Frost-Killian (University of Johannesburg), published in Episodes, the USGS Yearbook and Mineral Commodity Summaries, the Minerals Commission and the Ghana Chamber of Mines.

A note on what “new” means. Ghana has been mined for gold for well over two millennia on the review’s account, and more than 1,500 tonnes has been produced. Most Ghana gold deposits that outcrop were found by local miners long before any company arrived. Modern discoveries come from under laterite, from depth, and from rock types earlier explorers ignored, such as granite. Our guide to gold deposit types, signs and prospecting methods covers how such ground is searched.

“Before the Witwatersrand was discovered in 1886, Ghana was Africa’s top gold producer.”

Where Ghana gold deposits are found: the belts

Ghana’s gold belts trend southwest to northeast, separated by basins of Birimian sediments and intruded by granites. The six named greenstone belts, from east to west and north, are Kibi-Winneba, Ashanti, Sefwi, Bui, Bole-Navrongo and Wa-Lawra. The Asankrangwa belt, within the Kumasi basin, also hosts deposits. The table sets out the main gold mining areas in Ghana by belt, using mines named in the USGS 2019 Yearbook and the Episodes review.

Most of the large Ghana gold deposits being mined sit in the southwest because that is where the Ashanti and Sefwi belts are best exposed and best explored, not necessarily because the northern belts are poorer. The review notes that the granitoid-hosted Julie deposit in northwestern Ghana may lift estimates for that style.

The inventory estimates for Ghana gold deposits in the review show the balance. Mesothermal quartz-vein and associated sulphide gold, sometimes called Ashanti shear-zone type, has an estimated total inventory of about 1,100 tonnes (32 Moz). Tarkwaian palaeoplacer gold is put at about 550 tonnes (16 Moz), and granitoid-hosted gold at about 100 tonnes (2.9 Moz), though the authors say that last figure could be higher with recent discoveries.

The three styles of Ghana gold deposits

Birimian shear-zone veins: the Obuasi type

Among Ghana gold deposits, this is the most important style. The review describes steeply dipping quartz veins formed in several stages, with gold either as free gold in fractures within the veins or as invisible gold held in sulphides disseminated through the surrounding rock. The gold is thought to have been deposited around 2.15 to 2.06 billion years ago during the Eburnean orogeny, from carbon-dioxide-rich metamorphic fluids at depths of 7 to 11 km.

Obuasi, also called the Ashanti deposit, is the type example and, in the review’s words, the largest gold mine in the region. The USGS recorded that AngloGold Ashanti poured first gold from its redeveloped Obuasi mine in December 2019 and expected an average of about 12,000 kg a year over the first ten years.

Tarkwaian palaeoplacers: the Tarkwa type

Economic gold also occurs in quartz-pebble conglomerates of the Banket Series of the Tarkwaian Group, laid down in alluvial fans and braided rivers and later modified by hydrothermal fluids. The Tarkwa district at the southwestern end of the Ashanti belt is the type locality; Abosso-Damang, Iduapriem, Tarkwa and Teberebie are examples. The review describes the gold as free gold in the conglomerate matrix and as inclusions and overgrowths on other heavy minerals.

For explorers, these sheet-like Ghana gold deposits behave more like the Witwatersrand (see our guide to the gold mining areas in South Africa) than like veins: continuity along strike and down dip is the key question. The calculator below turns reef dimensions and grade into tonnes and ounces so you can see what a target would need to be to matter.

Granitoid-hosted gold

Discovered mostly after exploration revived in the 1980s, granitoid-hosted gold occurs as stockworks and sulphide disseminations in small, steeply dipping granodiorite to granite bodies, concordant with northeast and east-striking faults. The review lists Ayanfuri, Chirano, Julie, Nkran Hill, Ntoroso, Obuasi and Yamfo as examples. These are usually lower grade but can be bulk-mineable.

How Ghana gold deposits were found

Almost every early mine began with local knowledge. The review records that the mines European companies worked in the late nineteenth century were located by local people who sampled soils, measured the gold and guided foreigners to the sites. The French entrepreneur Marie-Joseph Bonnat learned of workings at Tarkwa while held captive between 1871 and 1874, and leased a concession near Tarkwa from the Wassa chief in 1878. Large-scale mining at Obuasi began in 1895; Ashanti Goldfields Corporation was listed in 1897 and was producing 20,000 ounces a year by 1902.

That history still shapes exploration. Many Ghana gold deposits that reach surface were worked by hand long before modern companies, so old pits and small-scale workings are the first clue on almost any licence. The modern discoveries of the 1980s onward, including the granite-hosted deposits, came from systematic geology, geochemistry and geophysics across ground that looked unremarkable at surface.

Ghana gold in numbers

The USGS Mineral Commodity Summaries 2026 put Ghana’s mine output at 149 tonnes in 2024 and an estimated 150 tonnes in 2025, with reserves of 1,000 tonnes. The Ghana Chamber of Mines reported provisional output of a record 6 million ounces in 2025, of which large-scale mines contributed 2.9 million ounces and small-scale mining about 3.1 million. The series differ in method, so use each on its own terms.

The long view in the review explains the shape of the chart. Output reached about 410,500 ounces by 1914, from underground mines at Tarkwa, Obuasi and Prestea, and about 819,000 ounces by the end of the 1930s. It peaked at around one million ounces a year in the early 1960s, fell to a 50-year low of 232,000 ounces in 1982, and recovered after the Economic Recovery Plan of 1983. By 2014 it was 3.48 million ounces.

In 2019 the USGS Yearbook for Ghana recorded 92,968 kg from large-scale mines, with Ahafo at about 20,000 kg after its mill expansion, Tarkwa at 16,143 kg, Iduapriem at 8,553 kg, Asanko at 7,808 kg and Damang at 6,470 kg. Gold was about 40% of export earnings and brought in about USD 6.23 billion. The Precious Minerals Marketing Company assayed all gold leaving the country.

Exploring Ghana gold deposits under laterite and forest

Deep tropical weathering is the defining problem. Much of southwest Ghana is covered by laterite, saprolite and forest, so the bedrock that carries the gold is rarely visible. The review notes that airborne geophysical data has been used to map the Tarkwaian and Birimian units beneath cover. In practice, explorers of Ghana gold deposits combine several layers of evidence:

1. Regional structure: airborne magnetics and satellite imagery to trace belt margins, shear corridors and granite bodies.
2. Regolith mapping: knowing whether soil is residual or transported decides whether a soil anomaly means anything.
3. Soil and auger geochemistry on lines across the corridors, with gold and pathfinder elements such as arsenic.
4. IP surveys where gold sits with disseminated sulphides, as in much of the vein-type gold.
5. Drilling: aircore or RC across anomalies first, diamond on the best.

The order matters because each step is cheaper than the next. Skipping the regional screening and going straight to trenching on a rumour is how licences burn through budgets without learning much.

A checklist for evaluating Ghana gold deposits

• ✔ Belt and corridor: which belt, and how far from its margin and the nearest regional shear?
• ✔ Style: vein and sulphide, Tarkwaian reef or granite stockwork?
• Data behind the grade: drill holes and lab certificates, or grab samples from old pits?
• Cover: how much of the licence is under laterite or transported soil?
• Title: licence type, expiry and holder on the Minerals Commission cadastre.
• ⚠ Land and people: small-scale workings, farms and rivers inside the licence.

Small-scale mining and the gold mining areas in Ghana

Small-scale and artisanal mining was the only source of gold in Ghana before the twentieth century, the review notes, and it is again a large share of output. The USGS estimated it employed more than 1 million people in 2019 and accounted for 35% of production that year. The Chamber of Mines’ provisional figures show small-scale output rising 64% to 3.11 million ounces in 2025, helped by reforms including the Ghana Gold Board (GoldBod).

For a licence holder, the growth of small-scale mining changes the ground. Many gold mining areas in Ghana, particularly river valleys in the Ashanti and Western regions, carry active or abandoned small-scale workings, some unlicensed. Any new project needs a clear picture of who is working where before it starts, and a plan for rivers and land already disturbed.

Small-scale mining is reserved for Ghanaians. The Minerals Commission describes small-scale mining licences as available only to Ghanaian citizens, and the Licensing Regulations (L.I. 2176) cap a small-scale licence at 12 small-scale cadastral units, about 10.2 hectares. That matters to foreign investors: the realistic route into small-scale Ghana gold deposits is a support or offtake arrangement within the rules, not ownership of the licence.

It also matters for due diligence. A seller offering a “concession” in a river valley may hold a small-scale licence that cannot be transferred to a foreign company, or no licence at all. Check the licence on the Commission’s cadastre before any discussion of price.

“Ghana’s vein-type gold has an estimated total inventory of about 1,100 tonnes, some 32 million ounces.”

Beyond gold: manganese and bauxite in Ghana

Mineral deposits in Ghana are not only Ghana gold deposits. The USGS ranked Ghana the third-largest producer of manganese in Africa in 2019. Ghana Manganese Company, then the sole producer, mined about 5.4 million tonnes of ore (gross weight) that year from its open pit at Nsuta-Wassaw in the Western Region, up 18%. Its ore typically supplied electrolytic manganese plants in China.

Bauxite comes from Awaso in the Western North region. GIADEC says the Awaso mine has operated for more than 80 years and produces about one million tonnes of bauxite a year, run by Ghana Bauxite Company, jointly owned by a Ghanaian consortium and the government through GIADEC. The Nyinahin and Kyebi deposits are the planned next stages of an integrated aluminium industry; a 2023 resource estimate reported by the national press put Nyinahin Block B at a minimum of 375 million tonnes, above the historic 250 million.

Gold and mineral exploration companies in Ghana

The large producers named in the USGS 2019 Yearbook were AngloGold Ashanti (Obuasi, Iduapriem), Gold Fields (Tarkwa, Damang), Newmont (Ahafo, Akyem), Kinross (Chirano), Golden Star (Bogoso-Prestea, Wassa), Asanko Gold with Gold Fields (Asanko), Endeavour (Nzema), Perseus (Edikan) and Resolute (Bibiani, then on care and maintenance). Each large mine listed has a 10% government interest.

Gold exploration companies in Ghana range from these producers’ own exploration teams to juniors and local licence holders. Mineral exploration companies in Ghana that are serious about the belt margins and granite targets use airborne geophysics, soil sampling through laterite, IP and drilling. Our guide to geophysical methods for gold exploration explains how each fits.

Licensing Ghana gold deposits: the Minerals Commission

Minerals in Ghana are vested in the state and rights are granted by the Minister on the advice of the Minerals Commission, under the Minerals and Mining Act, 2006 (Act 703). The Commission’s mineral rights page describes reconnaissance licences, prospecting licences, mining leases and small-scale licences, built from cadastral units of 21 hectares, and all applications are made online. The Ghana Geological Survey Authority holds the geological maps and data.

For the full process, fees and deadlines, see our Minerals Commission Ghana mining licence guide.

Ranking a Ghanaian gold licence before fieldwork

Laterite, forest and farmland cover many Ghana gold deposits and much of the Birimian belts, and the gold follows shear corridors, contacts and alteration. Our satellite-based mineral detection analyses multispectral and hyperspectral imagery of your licence, where each mineral and alteration zone reflects light in its own spectral signature, and flags likely mineralised target zones, alteration halos, faults and fractures.

• ✔ Input: licence coordinates, KML/KMZ or polygon, plus the target mineral (gold, manganese or bauxite).
• Turnaround: 5–20 business days depending on area and mineral complexity.
• Deliverables: prospectivity heatmaps, high-potential zones with estimated location and depth ranges, geological interpretation, PDF and GIS files; Premium+ adds TargetMax™ drilling intelligence and 3D subsurface models.
• Cost and time: up to 80–85% lower early-exploration cost and timelines cut from months to days.
• ⚠ Limits: results are exploration targets, not resources; they need soil sampling, geophysics and drilling to confirm.

Draw your licence on mining.farmonaut.com (Map Your Mining Site), or send the coordinates through our mining query form for a quote. A sample deliverable is in the satellite-driven 3D mineral prospectivity mapping overview. We have scanned 100,000+ hectares for 20+ mineral types across 25+ countries.

Terms used for Ghana gold deposits

Birimian Supergroup

Palaeoproterozoic volcanic and sedimentary rocks that make up Ghana’s greenstone belts and basins.

Tarkwaian Group

Younger sandstones and conglomerates laid over the Birimian; its Banket Series hosts the Tarkwa reefs.

Banket

Quartz-pebble conglomerate carrying gold in its matrix.

Eburnean orogeny

The mountain-building event, about 2.1 billion years ago, when most of Ghana’s gold was deposited.

Invisible gold

Gold held in sulphide minerals, too fine to see, common in Obuasi-type ores.

Laterite

An iron-rich weathered crust that hides bedrock across much of southwest Ghana.

Frequently asked questions

Reviewed September 2026 against Smith, Henry and Frost-Killian (2016) in Episodes 39(2), the USGS 2019 Minerals Yearbook for Ghana and Mineral Commodity Summaries 2026, Ghana Chamber of Mines provisional 2025 data as reported by Reuters, GIADEC, the Minerals Commission and the Ghana Geological Survey Authority.

Mines and deposits are named only as published geological examples; Farmonaut did not discover them. Production, inventory and reserve figures carry the dates given and are revised by their publishers. Licensing rules, fees and royalty terms change; confirm with the Minerals Commission. This guide is general information, not legal or investment advice.