Search results
Results from the WOW.Com Content Network
Rare earths are contained in secondary phosphates and aluminophosphates, presumably derived from weathering of the Proterozoic Mount Weld carbonatite. [4] The primary commercial interest at the site is targeted towards oxides as well as further niobium and tantalum deposits within the intrusive pipe of the Mount Weld carbonatite, which is approximately three kilometers (1.9 mi) in diameter.
Broken Hill is the type locality for a class of ore deposits known as Broken Hill Type, or BHT, ore deposits. [6] This is a classification grouping of similar deposits for use in ore genesis theories and mineral exploration methodologies. [10] The key criteria for BHT ore deposits are; [11]
The rainforest reserves have an extremely high conservation value, with more than 200 rare or threatened plant and animal species. [2] Eight separate areas have been identified as having outstanding heritage significance to Australia and are included on the Australian National Heritage List. [4]
[2] [3] Rare earth minerals are rare because rare earth elements have unique geochemical properties that prevent them from easily forming minerals, [4] and are therefore not normally found in deposits large or concentrated enough for mining. [4] This is the reason they are called "rare" earths.
Quartz-pebble metaconglomerate (Jack Hills Quartzite), the rock type that contains Earth's oldest dated mineral grains (detrital zircon) Detrital zircons with ages greater than 4 billion years old have been found in these rocks, and a 4,404 ± 8 million year old zircon was found at Erawandoo Hill; [4] this is the oldest dated material originating on Earth; the date is in the Cryptic era of the ...
Most rare earth elements are located in China, with the world’s second-largest economy estimated to account for 70% of global rare earth ore extraction and 90% of rare earth ore processing.
The Tumblagooda Sandstone is a geological formation deposited during the Silurian or Ordovician periods, between four and five hundred million years ago, and is now exposed on the west coast of Australia in river and coastal gorges near the tourist town of Kalbarri, Kalbarri National Park and the Murchison River gorge, [1] straddling the boundary of the Carnarvon and Perth basins. [2]
The rare-earth elements (REE), also called the rare-earth metals or rare earths, and sometimes the lanthanides or lanthanoids (although scandium and yttrium, which do not belong to this series, are usually included as rare earths), [1] are a set of 17 nearly indistinguishable lustrous silvery-white soft heavy metals. Compounds containing rare ...