This document provides information about the 7767 L mine site located in Barue District, Manica Province, Mozambique. The mine site covers an area of 7861.36 hectares and is near the Nhampassa Village. The regional geology consists of Proterozoic metamorphic rocks that are part of the Barue Complex formation. At the mine site, the dominant rock types include mica schist, micaeous gneisses, pegmatite dykes, and quartzo-feldspathic gneisses. Pegmatites in the area contain gemstone varieties of tourmaline, rubellite, and aquamarine.
17. INTRODUTION:
Location: 7767 L Mine is located near to Nhampassa Village, Barue District, Manica Province, Mozambique.
Access : well connected access to Mine is from Guro and Catandica is near to Nhampassa Village, Barue District,
Manica Province, Mozambique.
Drainage of Area: All area is well connected drendtic pattern of drainage with small rivers and tributaries. Most of
the water flows towards W→E,SE direction .
Regoinal Geology of the area: This area is belongs to Proterozoic period of age of rocks, south gondwana basin
minerals of Barue complex.
Báruè Complex –The bulk of Proterozoic rocks along the eastern margin of the
Zimbabwe Craton, south of the Mungári latitude to almost the Save River, is attributedto theBáruè Complex. Typical
lithologies comprise quartzose, feldspathicand micaceous gneisses and migmatites with minor intercalations of
quartzite,marble and mafic rocks in places. The sedimentary protoliths of these lithologiescorrespond most likely to
monotonous turbidite sequences deposited on the passive
margin of the Zimbabwe Craton.
Barue Complex divided in to :
Chimoio Group – Quartzo-feldspathic and micaceous gneisses and migmatites
and siliciclastic metasediments.
Macossa Group – Comprises substantial quantities of amphibole-bearing
gneisses, hornblendite, calc-silicate rock and marble. The lowermost rock units of the inferred palaeobasin include
garnetiferous leucocratic
gneisses, quartz-feldspar gneisses, meta-arkoses and arkosic quartzites. These psammitic metasediments are
overlain by more pelitic rocks (metagreywackes, garnet and sillimanite bearing mica schist and mica gneisses) with
thin calc-silicate gneiss .
The Guro suite comprising Foliated aplitic granite ,Migmaties alternating with meta gabbros, mafic migmatitic roks.
Lithology : The Báruè Complex is composed of a variety of medium- to high-grade gneisses, migmatites
and granitoids, with subordinate intercalations of mafic rocks, quartzites, marbles and
associated calc-silicate rocks.
The Mine 7767L area is comprise of various metamorphic rocks such as Mica schist, Micaeous Gneisses, pegmatite
dykes, pegmatite Gneisses, ferruginous quartzites, quartzo feldspathic gneisses etc.
This area also consists of Sedimentary rocks like ferruginous laterites, lateriti red soils on the surface,
The pegmatites are associated with micaeous gneisses, schists, Gneisses having strike direction N-S dipping 90° .
these Pegmatites consist of Gem variety of Tourmaline,Rubelite,aquamarine,morganite in the area. Gneisses are
covered most of the area consist of micaeous ,pegmatite’s, quartzite’s etc.
Muscovite, biotite, flogophyte variety of mica found in the area.
Micaeous gneisses are stikeing N-S , diping 90° towards E-W trending. These are comprises gem baring pegmatite
dykes in the area.