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Mineralogy of various types of Th-U-REE mineralisation in the iron oxide – apatite deposits of the Bafq district, Central Iran

Mineralogy of various types of Th-U-REE mineralisation in the iron oxide – apatite deposits of... The Bafq district, well-known in the world, is the most important iron province in Central Iran. The Early Cambrian volcano-sedimentary sequence in this district, hosts a lot of mineral deposits such as Kiruna-type iron oxide-apatite (IOA), Fe-Mn exhalative and Pb-Zn SEDEX types. Th-U-REE mineralisation in the Bafq IOA deposits occurs in a variety of element associations, (i) REE-P mineralisation as apatite hosting REE-mineral inclusions, (ii) Th-REE mineralisation as Th-REE minerals (e.g. REE-bearing thorite and titanite), (iii) thorium mineralisation as thorium minerals (e.g. thorite and huttonite), (iv) U-REE mineralisation as U-REE minerals (e.g. uraninite and cleveite) and (v) REE-U-Th mineralisation as REE-U-Th minerals (e.g. davidite and allanite). Two main types of apatite are recognised: apatite with inclusions (dominantly monazite, xenotime and allanite) and inclusion poor/free apatite. The presence of calcite paragenesis with Th-REE, Th and U-Th-REE mineralisation indicates transportation of Th and REEs by carbonate complexes in post-magmatic alkaline fluids. http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png Applied Earth Science Taylor & Francis

Mineralogy of various types of Th-U-REE mineralisation in the iron oxide – apatite deposits of the Bafq district, Central Iran

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Mineralogy of various types of Th-U-REE mineralisation in the iron oxide – apatite deposits of the Bafq district, Central Iran

Abstract

The Bafq district, well-known in the world, is the most important iron province in Central Iran. The Early Cambrian volcano-sedimentary sequence in this district, hosts a lot of mineral deposits such as Kiruna-type iron oxide-apatite (IOA), Fe-Mn exhalative and Pb-Zn SEDEX types. Th-U-REE mineralisation in the Bafq IOA deposits occurs in a variety of element associations, (i) REE-P mineralisation as apatite hosting REE-mineral inclusions, (ii) Th-REE mineralisation as Th-REE minerals (e.g....
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Publisher
Taylor & Francis
Copyright
© 2022 Institute of Materials, Minerals and Mining and The AusIMM
ISSN
2572-6838
eISSN
2572-6846
DOI
10.1080/25726838.2022.2147300
Publisher site
See Article on Publisher Site

Abstract

The Bafq district, well-known in the world, is the most important iron province in Central Iran. The Early Cambrian volcano-sedimentary sequence in this district, hosts a lot of mineral deposits such as Kiruna-type iron oxide-apatite (IOA), Fe-Mn exhalative and Pb-Zn SEDEX types. Th-U-REE mineralisation in the Bafq IOA deposits occurs in a variety of element associations, (i) REE-P mineralisation as apatite hosting REE-mineral inclusions, (ii) Th-REE mineralisation as Th-REE minerals (e.g. REE-bearing thorite and titanite), (iii) thorium mineralisation as thorium minerals (e.g. thorite and huttonite), (iv) U-REE mineralisation as U-REE minerals (e.g. uraninite and cleveite) and (v) REE-U-Th mineralisation as REE-U-Th minerals (e.g. davidite and allanite). Two main types of apatite are recognised: apatite with inclusions (dominantly monazite, xenotime and allanite) and inclusion poor/free apatite. The presence of calcite paragenesis with Th-REE, Th and U-Th-REE mineralisation indicates transportation of Th and REEs by carbonate complexes in post-magmatic alkaline fluids.

Journal

Applied Earth Science – Taylor & Francis

Published: Jan 2, 2023

Keywords: Th-U-REE mineralisation; iron oxide-apatite (IOA) deposit; Bafq district; Central Iran

References

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