Deposit number | Country | Location | Names | Commodities |
699 | Zambia | 13.27.40 S -- 024.59.40 E | Kalengwa | Cu |
Database name: | World Fe-oxide+/-Cu-Au-U (IOCG) deposits | |||||||||
Compilers: | Sunil S. Gandhi | |||||||||
Release date: | 2015-03-04 | |||||||||
Deposit name(s): | Kalengwa | |||||||||
Political location(s): | Zambia; Nearest community: Kasempa (56 mi 270) | |||||||||
Deposit clan (type): | Olympic Dam-type | |||||||||
Deposit (sub) types: | sedimentary clast breccia; hosted by siliclastic sediments, with some shale and carbonate beds, overturned and steeply dipping; intruded by sodic altered mafic body; high grade due to strong supergene enrichment.; Reference: Ellis, M. W.; McGregor, J. A., 1967: The Kalengwa Copper Deposit in North-western Zambia; Economic Geology, Volume 62, p. 781 - 797 | |||||||||
Deposit status: | past producer; Size category: 0.6 million tonnes; Status comments: Blind ore body discovered in 1965; steeply dipping and lenticular; open pit mine to a depth of 150 m; the high grade ore, averaging 24 % Cu, is comprised mainly of supergene malachite and chalcocite. | |||||||||
Geologic province: | Lufilian Fold Belt | |||||||||
Geologic subprovince: | Zambian Copperbelt | |||||||||
Geologic district: | western margin of Zambian Copperbelt | |||||||||
Deposit object located: | mine site | |||||||||
Commodities: | Cu | |||||||||
Mineralization styles: | breccia-fillings; replacement of carbonate matrix ; disseminated Cu-sulphides in strata | |||||||||
Geological ages: | Late Neohelikian - Cambrian (related magmatics) | |||||||||
Tectonic setting: | continental rift-intracratonic; convergent; Formal name: Lufilian (mineralization) | |||||||||
Coincident features: | fractures and breccia zones (ore zone transgressive at low angle to overturned host beds dipping 50-70 degrees to NW); Coincident feature name: folded sedimentary sequence | |||||||||
Regional tectonic structure: | Neoproterozoic granitoids in Paleoproterozoic terrane (two phases of granitoids in ca. 570-530 Ma range; younger phase with magnetic anomalies on carapace) Tectonic structure name: Hook Batholith | |||||||||
Host rocks: | (1) sedimentary; mudstone-carbonate-sandstone-conglomerate (Post-Katanga Neoproterozoic strata); Metamorphic grade: lower greenschist | |||||||||
Related igneous rocks: | (1) intrusive; gabbro-diorite suite (altered strongly to albite-rich rock); Initials: Albite-chlorite rock; Magma series: calc-alkaline; Depositional setting: continental (2) intrusive; unclassified granitoid rocks (Late tectonic, Pan-African, granite); Magma series: alkaline (A-type); Depositional setting: continental | |||||||||
Country rocks: | (1) conglomerate; (calcareous conglomerate); Country rock name: Kc; Metamorphic grade: lower greenschist (2) shale; (stratigrafically beolw Kc); Country rock name: Kd; Metamorphic grade: lower greenschist (3) silty dolomitic limestone; (stratigraphic marker above Kc); Country rock name: Kb; Metamorphic grade: lower greenschist (4) sandstone-shale; (youngest unit of host sequence); Country rock name: Ka; Metamorphic grade: lower greenschist | |||||||||
Alteration signatures: | albitization: albite; What was altered: intrusion in host sediments near the deposit chloritization: chlorite; What was altered: intrusion in host sediments near the deposit supergene enrichment: malachite, chalcocite, digenite, cuprite, native c; What was altered: ore zone | |||||||||
Mineralogy: | (mineralization): chalcocite, malachite | |||||||||
Radiometric ages: | Object dated: Related igneous rocks; Dating method: U-Pb; Concentrate: zircon; Source rock: granite; Formal name: Hook granite; Event dated: mineralization; Reference: Hanson, R. E.; Wardlaw, M. S.; Wilson, T. J.; Mwale, G., 1993: U-Pb Zircon Ages from the Hook Granite Massif and Mwembeshi Dislocation: Constraint of Pan-African Deformation, Plutonism and Transcurrent Shearing in Zambia; Precambrian Research, Volume 63, p. 189 - 209 | |||||||||
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