{"id":105336,"date":"2025-07-13T17:48:08","date_gmt":"2025-07-13T17:48:08","guid":{"rendered":"https:\/\/www.africa-press.net\/rwanda\/all-news\/rare-traces-of-earths-primordial-crust-in-australia"},"modified":"2025-07-13T18:52:26","modified_gmt":"2025-07-13T18:52:26","slug":"rare-traces-of-earths-primordial-crust-in-australia","status":"publish","type":"post","link":"https:\/\/www.africa-press.net\/rwanda\/all-news\/rare-traces-of-earths-primordial-crust-in-australia","title":{"rendered":"Rare Traces of Earth’s Primordial Crust in Australia"},"content":{"rendered":"

Africa-Press – Rwanda. <\/strong><\/span>Precious few exposed areas on Earth offer researchers an opportunity to directly observe our planet\u2019s ancient crust. Australia, boasting some of the world\u2019s oldest rocks, possesses such zones.<\/p>\n

Australia\u2019s ancient rocks have helped scientists find remnants of our planet Earth\u2019s “original” crust, new research has revealed.<\/p>\n

The Earth formed around 4.5 billion years ago from the crystallization of the surface magma ocean.<\/p>\n

Continental crust, rich in mineral resources, now covers 41 percent of our planet\u2019s surface, but it is mostly deeply buried.<\/p>\n

A team of scientists from the School of Earth and Planetary Sciences, Curtin University, Perth, hit upon a method of peering into that deep primordial crust.<\/p>\n

Believed to be almost 4 billion years old, rocks in the Murchison district of Western Australia are some of the most ancient. The study, published in Communications Earth & Environment, explains how geological structures known as dykes can carry tiny fragments of minerals from depths of at least 50 kilometers up to the surface.<\/p>\n

The team examined the structures in rocks near the town of Collie, in the South West region of Western Australia.<\/p>\n

The study dated grains of of the semi-precious mineral zircon<\/b> that contains trace amounts of uranium. Since the uranium decays to lead over time, measuring the ratio of lead to uranium in zircon crystals can reveal their age \u2014 with some dating back 3.44 billion years.<\/p>\n

The zircon stones survived their journey from the bowels of the earth because they were encapsulated in a different mineral \u2013 titanite<\/b>.<\/p>\n

More zircon grains were found further north, suggesting that the ancient rocks of Western Australia cover a greater area than previously thought.<\/p>\n

Since metals are often found at boundaries between blocks of the primordial crust, mapping these zones will aid further investigation of mining potential, added the study.<\/p>\n

For More News And Analysis About Rwanda<\/span> Follow Africa-Press<\/span><\/strong><\/p>\n","protected":false},"excerpt":{"rendered":"

Africa-Press – Rwanda. Precious few exposed areas on Earth offer researchers an opportunity to directly observe our planet\u2019s ancient crust. Australia, boasting some of the world\u2019s oldest rocks, possesses such zones. Australia\u2019s ancient rocks have helped scientists find remnants of our planet Earth\u2019s “original” crust, new research has revealed. The Earth formed around 4.5 billion […]<\/p>\n","protected":false},"author":84,"featured_media":105335,"comment_status":"open","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[24,31],"tags":[758],"class_list":["post-105336","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-all-news","category-miscellaneous","tag-rwanda"],"yoast_head":"\nRare Traces of Earth's Primordial Crust in Australia - Rwanda<\/title>\n<meta name=\"description\" content=\"Precious few exposed areas on Earth offer researchers an opportunity to directly observe our planet\u2019s ancient crust. 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