Lac Télé structure, Republic of Congo: Geological setting of a cryptozoological and biodiversity hotspot, and evidence against an impact origin

Master, Sharad

doi:10.1016/j.jafrearsci.2009.07.017

Cited by 7 publications

(10 citation statements)

References 49 publications

(78 reference statements)

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“…However, Master et al proceed to refer to “features found in known impact structures” – including mosaicism, deformation bands, and lamellae in plagioclase and alkali feldspars, and cleavage in quartz, as well as “gries”-textured breccias and multiply-striated joint surfaces. Master, 2010a , Master, 2010b adds to these findings an observation of breccia dikes consisting of polymict clasts including subrounded fragments of lava of different sizes, and individual plagioclase crystals, all of which are enclosed in a fine-grained altered dark matrix (resembling pseudotachylite), rich in clay minerals and red iron oxides. These dikes are alleged to cross-cut intensely brecciated mafic lava.…”

Section: The Impact Record Of Africamentioning

confidence: 99%

See 1 more Smart Citation

Impact structures in Africa: A review

Reimold¹,

Koeberl²

2014

Journal of African Earth Sciences

127

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Section: The Impact Record Of Africamentioning

confidence: 99%

“…Master et al (2009) and Master, 2010a , Master, 2010b reported a pronounced, 1.3 km wide, circular geophysical anomaly at about 24°46′E and 24°42′S, some 15 km south of Jwaneng (a prominent diamond-mining town) in Botswana. They termed this structure the Jwaneng South structure.…”

Section: The Impact Record Of Africamentioning

confidence: 99%

Impact structures in Africa: A review

Reimold¹,

Koeberl²

2014

Journal of African Earth Sciences

127

View full text Add to dashboard Cite

show abstract

“…There have also been a number of studies of river water chemistry (Laraque et al 2001(Laraque et al , 2009, the geological origins of the basin (Daly et al 1992;Crosby et al 2010;Kadima et al 2011;Buiter et al 2012), remote-sensing-based studies of hydrology and vegetation distribution (Mayaux et al 2004;Vancutsem et al 2009;Bwangoy et al 2010;Jung et al 2010;Betbeder et al 2014;Lee et al 2015), and the contested origins of Lac Télé (Master 2010). None of these studies have taken account of the status of the Cuvette Centrale as a major peatland complex, but many of them are, with hindsight, relevant to understanding the system as a whole.…”

Section: Study Areamentioning

confidence: 99%

Congo Basin peatlands: threats and conservation priorities

Dargie

Lawson

Rayden

et al. 2018

Mitig Adapt Strateg Glob Change

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The recent publication of the first spatially explicit map of peatlands in the Cuvette Centrale, central Congo Basin, reveals it to be the most extensive tropical peatland complex, at ca. 145,500 km 2 . With an estimated 30.6 Pg of carbon stored in these peatlands, there are now questions about whether these carbon stocks are under threat and, if so, what can be done to protect them. Here, we analyse the potential threats to Congo Basin peat carbon stocks and identify knowledge gaps in relation to these threats, and to how the peatland systems might respond. Climate change emerges as a particularly pressing concern, given its potential to destabilise carbon stocks across the whole area. Socio-economic developments are increasing across central Africa and, whilst much of the peatland area is protected on paper by some form of conservation designation, the potential exists for hydrocarbon exploration, logging, plantations and other forms of disturbance to significantly damage the peatland ecosystems. The low level of human intervention at present suggests that the opportunity still exists to protect the peatlands in a largely intact state, possibly drawing on climate change mitigation

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“…6). Young or active volcanism in this region is extremely unlikely (Master 2010) and undocumented by seismic or geophysical analyses (Kadima et al 2011b). Deepseated magmatic bodies should be detectable in the geophysical maps as suggested by Kadima et al (2011b); however, in the area, no short wavelength gravity highs were recorded.…”

Section: Discussion: An Impact Origin For the Large-size Omeonga Strumentioning

confidence: 97%

“…6). Young or active volcanism in this region is extremely unlikely (Master 2010) and undocumented by seismic or geophysical analyses (Kadima et al. 2011b).…”

Section: Discussion: An Impact Origin For the Large‐size Omeonga Strumentioning

confidence: 99%

Omeonga—A possible large impact structure on the Eastern Kasai Province (D.R. Congo)?

Monegato

Massironi

Martellato

et al. 2011

Meteorit & Planetary Scien

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Abstract-The Omeonga ring structure (D.R. Congo) shows a remarkable drainage pattern encircling an area up to 45 km wide and encompassing a central smoothed relief 20 km wide. This inner circular ridge is elevated about 70 m above the ring depression corresponding to the bed of the Unia River, which flows between the inner ridge and an outer irregular ridge. Landsat 7 ETM and ASTER DEM show that the structural characteristics resemble those of several wide impact structures known on Earth. Other geological modes of origin that could produce ring structures, such as magmatic activity, salt diapirism, and karst dissolution have been considered. However, after evaluating the regional stratigraphy, the distribution of volcanism, and morphometry, these processes seem to be rather unlikely. If of impact origin, the age of the Omeonga structure can be constrained to the Late Cretaceous-Cenozoic according to the youngest units in which the ring structure was formed.

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Lac Télé structure, Republic of Congo: Geological setting of a cryptozoological and biodiversity hotspot, and evidence against an impact origin

Cited by 7 publications

References 49 publications

Impact structures in Africa: A review

Impact structures in Africa: A review

Congo Basin peatlands: threats and conservation priorities

Omeonga—A possible large impact structure on the Eastern Kasai Province (D.R. Congo)?

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