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Geochemistry of carbonatites and related rocks: the Lueshe complex (Kivu, Congo)

✍ Scribed by J. Moutte; M. Nasraoul

Book ID
104354088
Publisher
Elsevier Science
Year
2001
Tongue
English
Weight
241 KB
Volume
32
Category
Article
ISSN
1464-343X

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✦ Synopsis

Carbonatites in Southern

Malawi belong to the late stage intrusion of the Chilwa Alkaline Province of Upper Jurassic to Lower Cretaceous. They are characterised by a circular zone of fenitised rocks in which carbonate rocks, ijolites and alkaline rocks derived from nephelinitic lavas intruded forming igneous ring complex structures. Major Economic minerals, which are found in the carbonatites, are rare earth minerals, apatite and pyrochlore.

πŸ“œ SIMILAR VOLUMES

Rbξ—ΈSr whole rock ages of the lueshe, Kir
Rbξ—ΈSr whole rock ages of the lueshe, Kirumba and Numbi igneous complexes (Kivu, Democratic Republic of Congo) and the break-up of the Rodinia supercontinent
✍ A.B. Kampunzu; J.D. Kramers; M.N. Makutu πŸ“‚ Article πŸ“… 1998 πŸ› Elsevier Science 🌐 English βš– 673 KB

The ages of the Lueshe, Kirumba and Numbi alkaline and carbonatitic complexes have been determined at 822\_+ 120 Ma, 803 + 22 Ma and 830 +\_ 51 Ma, respectively, with initial 87Sr/86Sr ratios around 0.703. These ages are significantly older than Rb-Sr and K-Ar mineral and whole rock ages reported pr