Geochemistry of low-temperature (&lt;350 °C) metamorphic and hydrothermal monazite

Zi, Jian-Wei; Muhling, Janet R.; Rasmussen, Birger

doi:10.1016/j.earscirev.2023.104668

Cited by 6 publications

(1 citation statement)

References 199 publications

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“…Although monazite-(La), monazite-(Nd), and monazite-(Sm) are also known, cerium dominating monazite (monazite-(Ce)) is the most frequent. Monazite structure most favorably integrates LREEs from La to Nd (Zi et al, 2024).…”

Section: Introductionmentioning

confidence: 99%

Purification and Characterization of Monazite from Bangka using Mechanical-Magnetic Separation Method

Aldila,

Indriawati,

Putro

2024

jppipa, pendidikan ipa, fisika, biologi, kimia

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In this research, the purification and characteristics of monazite, a by-product of the tin ore enrichment process. Monazite is given pre-treatment to monazite sand using the mechanical-magnetic separation method to increase the content of rare earth metal elements. Based on the results of the analysis of monazite samples from Tin mine tailings concentrate that has been purified, the dominant elements of the highest rare earth metals are cerium (Ce), lanthanum (La), neodymium (Nd), and Yttrium (Y). The mechanical-magnetic separation method, monazite from Tin mine tailings concentrate can have higher purity. These rare earth metal elements can be further extracted or synthesized; and used as supporting or even main materials in developing advanced technological industries.

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Section: Introductionmentioning

confidence: 99%

Purification and Characterization of Monazite from Bangka using Mechanical-Magnetic Separation Method

Aldila,

Indriawati,

Putro

2024

jppipa, pendidikan ipa, fisika, biologi, kimia

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A clockwise P‐T‐t-D path of the northern Patagonia basement: implications for the Permian evolution of the Panthalassan margin of Gondwana

González,

Oriolo,

Schulz

et al. 2024

International Geology Review

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Clues on the Australasian impact crater site inferred from detailed mineralogical study of a monazite inclusion in a Muong Nong tektite

Seydoux-Guillaume,

Rochette,

Gardés

et al. 2024

Geology

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Tektites are terrestrial impact-generated glasses distributed over regions of Earth's surface with ejection distances up to 10,000 km. The Australasian tektite strewn field is the largest and the youngest discovered so far (788 ka). However, the location of the source crater remains unsolved. The present work is the first to investigate the only monazite ever found as an inclusion in a Muong Nong tektite (MNT) from Indochina. In-depth observations down to the nanoscale revealed that the monazite experienced very high temperature, with silicate melt injection sometimes trapped within porosity at the grain boundaries, followed by a recovery mechanism responsible for dislocation migration and subgrain formation. The absence of radiation damage confirms that this recovery episode occurred recently, in line with the age of the tektite. The preservation of a primary zonation (Th component) and the absence of detectable diffusion profiles indicate that the monazite did not reach the melting point (∼2050 °C) before initial rapid cooling (∼1000 °C/s). The U-Th–total Pb dates of the monazite thus remained unchanged during the impact: 73 ± 6 Ma in a Th-rich domain and 156 ± 15 Ma in a Th-poor domain. This allows the source of the MNT to be constrained. Comparison with a detailed database of monazite ages and Th/U ratios in SE Asia indicates that the Australasian crater should be sought for in the triangle made up of the Philippines, coastal south China, and northern Vietnam, though the latter appears less probable.

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Geochemistry of low-temperature (<350 °C) metamorphic and hydrothermal monazite

Cited by 6 publications

References 199 publications

Purification and Characterization of Monazite from Bangka using Mechanical-Magnetic Separation Method

Purification and Characterization of Monazite from Bangka using Mechanical-Magnetic Separation Method

A clockwise P‐T‐t-D path of the northern Patagonia basement: implications for the Permian evolution of the Panthalassan margin of Gondwana

Clues on the Australasian impact crater site inferred from detailed mineralogical study of a monazite inclusion in a Muong Nong tektite

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