Raymond’s Geology Blog
June 1, 2026

Geology and Mineral Resources – Qatar

Introduction

Figure 1 – Qatar
Credit: Mapsland, Creative Commons Attribution-Share Alike 3.0 Licence

The State of Qatar is a country of 2,532,104 people on the northeast corner of the Arabian Peninsula. The country has an area of 11,581 square kilometres and has a land border with Saudi Arabia. Qatar juts into the Persian Gulf. The Gulf of Bahrain separates Qatar from Bahrain. North across the Persian Gulf is, of course, Persia a.k.a. Iran.

Qatar is a very prosperous country with a per capita GDP (PPP) of $121,610 (the fourth highest GDP per capita in the world) and a very high Human Development Index of 0.886.Oil production is the largest part of the economy followed by services.

In the past year,the top exports of Qatar were petroleum gas, crude petroleum, refined petroleum, nitrogen fertilizers, and ethylene polymers. In the same period, the top imports were motor vehicles, financial instruments (documents), gold, gas turbines, and telephones. In February 2026, Qatar exported mostly to China, India, the United Arab Emirates, South Korea, and Singapore; and imported mostly from China, the United States, the United Arab Emirates, Japan, and Germany.

For more details on the country, check out the Wikipedia and Grokipedia articles on the country.

Geology

Figure 2 - Arabian Plate Showing General Tectonic and Structural Features
Credit: Richard M. Pollastro, USGS Bulletin 2202-H, public domain

Qatar sits on the Arabian Plate, specifically a feature called the Qatar Arch.

The surface geology of Qatar is fairly boring, the bedrock consists of Paleogene and Neogene aged carbonate and evaporite deposits.

Figure 3 links to an interactive map and geological column of the surface and subsurface formations in Qatar. The subsurface formations of Qatar are the most significant and include the rocks that host the oil and gas reservoirs of Qatar.

Figure 3 – Geological Formations of Qatar
Credit: Jacques LeBlanc, Qatar Lexicon of Stratigraphic Units

To look into the details of the geological formations at Qatar, open the Qatar Lexicon of Stratigraphic Units page and click on the formation name.

Paleontology

Salwasiren qatarensis

Figure 4 – Fossilized Dugong Rib Bones, Qatar
Credit: Alex Sergeev, Creative Commons Attribution-Share Alike 3.0 Unported license

The fossils found in Qatar are fairly limited. However, a recent discovery of Miocene aged sea cows in the Dam Formation is interesting. Called Salwasiren qatarensis, the fossils give insight into the evolution of dugongs in the ancient Tethys Sea and their role in the evolution of the ecosystem. Unfortunately, modern dugongs in the Persian Gulf may be on their way to extinction due to war and general environmental stress.

Figure 5 – Bones of Salwasiren qatarensis
Credit: Pyenson et al, 2025, Creative CommonsCC0 1.0 Universal Public Domain Dedication

Mineral Resources

Figure 6 – Gas Flare, Halul Island
Credit: Alex Sergeev, Creative Commons Attribution-Share Alike 3.0 Unported license

The most recent USGS Minerals Yearbook for Qatar describes the minerals industry of Qatar and the country has the usual industrial mineral extraction industries of an advanced state: cement, dimension stone, aggregate, etc. However, the real significant mineral industry of Qatar is petroleum and especially natural gas. Rather than just listing the oil and gas fields in Qatar, which are in the USGS Yearbook, lets first look at how we get oil and gas deposits . After that we can briefly examine the geology of the oil and gas deposits in Qatar.

Starting from first principles, what do we need for an oil and gas deposit? The answer is that you need a geological history that includes:

  • A source rock where organic matter can accumulate under anaerobic conditions, thus not decaying.

  • Burial of the source rock and the creation of a substance called kerogen and the subsequent transformation of the kerogen into oil and gas, under heat and pressure. There is a sweet spot for this transformation or catagenesis. If the temperature in the buried source remains below 60 ºC, the kerogen remains within the source rock, usually forming an oil shale. If the temperature rises to between 60 ºC and 120 ºC petroleum forms. If the source rock is buried deeper, the heat cracks the petroleum into natural gas, i.e. the long chain hydrocarbons of the petroleum are broken down into short chain hydrocarbons, like methane (CH4). Both petroleum and natural gas are fluid and can migrate through porous rocks.

  • Finally, we need a geologic trap where the hydrocarbons can accumulate. In a trap, an impervious formation overlies a permeable formation preventing further migration of the petroleum and natural gas, as in Figure 7, below.

Figure 7 – Varieties of Hydrocarbon Traps
Credit: MagentaGreen, Creative Commons Attribution-Share Alike 3.0 Unported license

So, what is the situation that led to the formation of the oil and gas in Qatar?

Where was the source rock? Remember Tethys? The formations shown in Figure 3 originated in the ancient Tethys Ocean. Sediments began accumulating in this basin during the Paleozoic and the best candidates for source rocks in the Qatari fields are the Silurian aged Qusaiba and Sharawra formations, which apparently generated oil and gas until the Jurassic.

So, what formed the traps? To answer this we have to look into the formation of the Qatar Arch; the origin of which lies in the Alpine Orogeny.

To illustrate the structures created by the orogeny, it helps to look at a cross-section of formations in Arabia, as in Figure 8.

Figure 8 – Cross-section Across the Qatar Arch and into Arabia
Credit: Figure 6 in Daneshvar et al 2023, Creative Commons Attribution 4.0 International licence

As you can see, the formation of the Qatar Arch created many structural traps for the accumulation of hydrocarbons in the region. Figure 9 shows the location of oil and gas fields in and around Qatar.

Figure 9 – Oil & Gas Fields together with Structural Elements
Credit: Figure 5 in Daneshvar et al 2023, Creative Commons Attribution 4.0 International licence

So, all in all, given the geological history of Qatar, there were plenty of opportunities for the accumulation of hydrocarbons in that country – much to the joy and enrichment of its inhabitants (remember that they have a per capita GDP (PPP) of $121,610).

For further reading on the petroleum geology of Qatar, here are a few references to follow up on if you like to dig deeply into these things (and I know that some of you do):

  • Pollastro, Richard M., 2003, Total Petroleum Systems of the Paleozoic and Jurassic, Greater Ghawar Uplift and Adjoining Provinces of Central Saudi Arabia and Northern Arabian-Persian Gulf, U.S. Geological Survey Bulletin 2202-H, https://pubs.usgs.gov/bul/b2202-h/b2202-h.pdf.

  • Jafar Aali, Hossain Rahimpour-Bonab, Mohammad Reza Kamali, 2006, Geochemistry and origin of the world's largest gas field from Persian Gulf, Iran, Journal of Petroleum Science and Engineering, Volume 50, Issues 3–4, 2006, Pages 161-175, ISSN 0920-4105, https://doi.org/10.1016/j.petrol.2005.12.004. This is on the geology of the South Pars Field.

  • Al‐Siddiqi, A. & Dawe, Richard., 2007, Qatar's oil and gasfields: A review, Journal of Petroleum Geology. 22. 417 – 436.,https://doi.org/10.1111/j.1747-5457.1999.tb00477.x

  • Perotti CR, Carruba S, Rinaldi M, Bertozzi G, Feltre L, Rahimi M., 2011, The Qatar–South Fars Arch Development (Arabian Platform, Persian Gulf): Insights from Seismic Interpretation and Analogue Modelling, New Frontiers in Tectonic Research - At the Midst of Plate Convergence, https://doi.org/10.5772/20299.

  • Daneshvar, M.R.M., Mansouri-Daneshvar, P., Moussavi-Harami, R. et al., 2023, A new insight into the evolution of the Qatar Arch to recognize faults and a new gas field, J Petrol Explor Prod Technol 13, 2157–2170 (2023), https://doi.org/10.1007/s13202-023-01674-7.

Summary

Figure 10 – Hot Desert Landscape – Qatar
Credit: Matt Kieffer, Creative Commons Attribution-Share Alike 2.0 Generic license

Qatar is an interesting place with an interesting history. Oil enriched the country, turning a trading post into an industrial and financial centre. It’s also the home of Al Jazeera, an influential news service. Without oil, and it will run out some day, Qatar will return to being a trading post on the Persian Gulf. The Qataris know this, why do you think they are importing gold?

For now, however, Qatar remains a place with good opportunities for geoscientists, especially in oil and gas exploration/development. Almost all the technical specialists in Qatar are foreigners and it is a good place to make a career in the oil business.

Standard Caveat

J. Robert Oppenheimer on freedom and scientific inquiry

The purpose of my weblog postings is to spark people's curiosity in geology. Don't entirely believe me until you've done your own research and checked the evidence. If I have sparked your curiosity in the subject of this posting, follow up with some of the links provided here. If you want to, go out into the field and examine some rocks on your own with the help of a good field guide. Follow the evidence and make up your own mind.

In science, the only authority is the evidence.