This is an apparent Mesozoic carbonatite occurrence that is located some 6.5 km west-northwest of the Marindagomo trigonometrical Station northeast of Kariba. It is reported to lie within Karoo strata at the foot of the Zambezi Escarpment and is largely concealed by more recent sediments.
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In the vicinity of N’tondongwe Hill four irregular bodies of metamorphosed carbonate rocks associated with magnetite, and lying within Precambrian biotite gneisses, were reported as being possible carbonatites. These are being investigated by K. Walsh (pers.
Nanuta was thought to be a metamorphosed carbonatite that had been intruded into granulites (Barber, 1991). It consists of two layers, each several kilometres long, lying conformably within Proterozoic paragneisses (mainly metabasites), xenoliths of which it includes.
The Kapfrugwa occurrence comprises an irregular body of carbonate-rich rocks lying in the axial area of a tightly plunging antiform of paragneiss (Barber, 1991). Two exposures described by Barton et al.
Katete is situated in the most southwesterly part of the Zambezi-Luangwa rift, the main part of which lies in Zambia to the north and northwest. The complex cuts Karoo sandstones which overlie Precambrian granite and gneiss.
The Dorowa complex is intruded into relatively uniform Archaean granitic gneisses. It consists of three ijolite and foyaite and several carbonatite intrusions all of which lie within an extensive area of fenites, which comprise nearly 90% of the complex.
Located 13 km south of Dorowa (No. 181-00-006) Shawa is a 6 km-diameter, nearly circular plug of serpentinized dunite which is partly enclosed by arcuate bodies of ijolite and with a central ring of carbonatite. The complex has been intruded into Archaean granite gneisses, which are fenitized.
Little appears to be known of this occurrence which lies some 10 km north-northwest of Chishanya (No. 181-00-009) on the western bank of the Save River close to its confluence with the Murambwi River.
The Chishanya complex consists of numerous intrusions of carbonatite and melteigite extending in a narrow belt between two parallel north-northeasterly-trending faults. The faults are marked by zones of sheared granite and quartz veins up to 200 m wide.
At the base of the Karoo basalts which extend for 200 km along the Sabi Monocline nephelinite lavas and intrusions are found at a number of localities.