A new tectonic and temporal framework for the Tanzanian Shield: Implications for gold metallogeny and undiscovered endowment

Kabete, J.M.; Groves, David; McNaughton, Neal J.; Mruma, A.

doi:10.1016/j.oregeorev.2012.02.009

Cited by 73 publications

(47 citation statements)

References 107 publications

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“…It has recently been reviewed from both tectonostratigraphic and metallogenic perspectives in Kabete et al, 2012a andKabete et al, 2012b. In addition to craton-wide reviews, considerable focus has also been given to the cratonic margins where it is in contact with Palaeoproterozoic orogenic belts (Ubendian-Usagaran) in the SW, south and SE (e.g.…”

Section: Introductionmentioning

confidence: 99%

“…2823-2671 Ma granitoidgreenstone belts in northern (Lake Victoria region) and central Tanzania. Kabete et al, 2012a andKabete et al, 2012b subdivided the Tanzania Craton into a number of broadly WNW-ESE trending terranes and "superterranes", based on differing lithotectonic and age criteria, noting that these continued south-eastwards into the East African Orogen where they were strongly reworked during the Neoproterozoic East African orogeny (see also Johnson et al, 2003 andCutten et al, 2006). A study byThomas et al (2013) focussed on part of this marginal zone east of Dodoma and concluded that the boundary between the un-reworked Neoarchaean crust (2.7 Ga) of central Tanzania was separated from the reworked Neoarchaean crust to the east by a mylonite zone with a top-to-the-NW sense of tectonic transport, and that this structure was initiated during the Palaeoproterozoic (Usagaran) tectonic event at ca.…”

Section: Introductionmentioning

confidence: 99%

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Geochronology of the central Tanzania Craton and its southern and eastern orogenic margins

Thomas

Spencer

Bushi³

et al. 2016

Precambrian Research

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Geological mapping and zircon U-Pb/Hf isotope data from 35 samples from the central Tanzania Craton and surrounding orogenic belts to the south and east allow a revised model of Precambrian crustal evolution of this part of East Africa. The geochronology of two studied segments of the craton shows them to be essentially the same, suggesting that they form a contiguous crustal section dominated by granitoid plutons. The oldest orthogneisses are dated at ca. 2820 Ma (Dodoma Suite) and the youngest alkaline syenite plutons at ca. 2610 Ma (Singida Suite). Plutonism was interrupted by a period of deposition of volcano-sedimentary rocks metamorphosed to greenschist facies, directly dated by a pyroclastic metavolcanic rock which gave an age of ca. 2725 Ma. This is supported by detrital zircons from psammitic metasedimentary rocks, which indicate a maximum depositional age of ca. 2740 Ma, with additional detrital sources 2820 and 2940 Ma. Thus, 200 Ma of episodic magmatism in this part of the Tanzania Craton was punctuated by a period of uplift, exhumation, erosion and clastic sedimentation/volcanism, followed by burial and renewed granitic to syenitic magmatism.In eastern Tanzania (Handeni block), in the heart of the East African Orogen, all the dated orthogneisses and charnockites (apart from those of the overthrust Neoproterozoic granulite nappes), have Neoarchaean protolith ages within a narrow range between 2710 and 2630 Ma, identical to (but more restricted than) the ages of the Singida Suite. They show evidence of Ediacaran "Pan-African" isotopic disturbance, but this is poorly defined. In contrast, granulite samples from the Wami Complex nappe were dated at ca. 605 and ca. 675 Ma, coeval with previous dates of the "Eastern Granulites" of eastern Tanzania and granulite nappes of adjacent NE Mozambique. To the south of the Tanzania Craton, samples of orthogneiss from the northern part of the Lupa area were dated at ca. 2730 Ma and clearly belong to the Tanzania Craton. However, granitoid samples from the southern part of the Lupa "block" have Palaeoproterozoic (Ubendian) intrusive ages of ca. 1920 Ma. Outcrops further south, at the northern tip of Lake Malawi, mark the SE continuation of the Ubendian belt, albeit with slightly younger ages of igneous rocks (ca. 1870-1900 Ma) which provide a link with the Ponte Messuli Complex, along strike to the SE in northern Mozambique.In SW Tanzania, rocks from the Mgazini area gave Ubendian protolith ages of ca. 1980-1800 Ma, but these rocks underwent Late Mesoproterozoic high-grade metamorphism between 1015 and 1040 Ma. One granitoid gave a crystallisation age of ca. 1080 Ma correlating with known Mesoproterozoic crust to the east in SE Tanzania and NE Mozambique. However, while the crust in the Mgazini area was clearly one of original Ubendian age, reworked and intruded by granitoids at ca. 1 Ga, the crust of SE Tanzania is a mixed Mesoproterozoic terrane and a continuation from NE Mozambique. Hence the Mgazini area lies at the edge of the Ubendian belt which was re...

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Geochronology of the central Tanzania Craton and its southern and eastern orogenic margins

Thomas

Spencer

Bushi³

et al. 2016

Precambrian Research

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“…The northern half of the Tanzanian Craton contains a series of roughly E-W trending, narrow segments of NeoArchean (e.g., Borg and Shackleton, 1997;Kabete et al, 2012;Sanislav et al, 2014) greenstone belts separated and surrounded by granitoid intrusions and gneiss terrains ( Fig. 1) that are intrusive or sheared contact with the greenstone sequences.…”

Section: Regional Geologymentioning

confidence: 99%

“…The Nyanzian Supergroup is unconformably overlain by the Kavirondian Supergroup, which consists mainly of coarse grained conglomerate, grit and quartzite. Underlying the supracrustal greenstone units is the Dodoman Supergroup, which consists of high-grade mafic and felsic granulite with subordinate lower-grade schist and thin slivers of greenstone (Kabete et al, 2012).…”

Section: Regional Geologymentioning

confidence: 99%

The geology of the giant Nyankanga gold deposit, Geita Greenstone Belt, Tanzania

Sanislav

Kolling²,

Brayshaw³

et al. 2015

Ore Geology Reviews

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“…The northern half of the Tanzania Craton is formed by a series of NeoArchean granite greenstones belts (Kabete et al, 2012) with a poorly constrained stratigraphy and geological history. The stratigraphy of the Tanzanian Craton has been subdivided in three main units (e.g.…”

Section: Regional Geologymentioning

confidence: 99%

A Giant Gold System, Geita Greenstone Belt, Tanzania

Sanislav

Dirks

Cook

et al. 2014

Acta Geologica Sinica (Eng)

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A new tectonic and temporal framework for the Tanzanian Shield: Implications for gold metallogeny and undiscovered endowment

Cited by 73 publications

References 107 publications

Geochronology of the central Tanzania Craton and its southern and eastern orogenic margins

Geochronology of the central Tanzania Craton and its southern and eastern orogenic margins

The geology of the giant Nyankanga gold deposit, Geita Greenstone Belt, Tanzania

A Giant Gold System, Geita Greenstone Belt, Tanzania

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