New K{Ar age determinations of Kilimanjaro volcano in the North Tanzanian diverging rift, East Africa

  title={New K\{Ar age determinations of Kilimanjaro volcano in the North Tanzanian diverging rift, East Africa},
  author={Philippe Nonnotte and Herv{\'e} Guillou and Bernard Le Gall and Mathieu Benoit and Joseph Cotten and St{\'e}phane Scaillet},
  journal={Journal of Volcanology and Geothermal Research},

Magmatic activity across the East African North Tanzanian Divergence Zone

Volcanism across the North Tanzanian Divergence Zone (NTD), part of the East African Rift System, occurred episodically from the late Miocene to Recent. Here, we present a summary of previously

Kilimanjaro National Park

The free-standing mountain of Kilimanjaro is a giant edifice comprised of three discrete volcanoes. They collectively cover an area of 6,000 km2. The two lowest peaks, Shira and Mawenzi are eroded

Lithospheric low-velocity zones associated with a magmatic segment of the Tanzanian Rift, East Africa

Rifting in a cratonic lithosphere is strongly controlled by several interacting processes including crust/mantle rheology, magmatism, inherited structure and stress regime. In order to better

Sector collapse events at volcanoes in the North Tanzanian divergence zone and their implications for regional tectonics

The North Tanzanian divergence zone along the East African Rift is characterized by active faults and several large volcanoes such as Meru, Ol Doinyo Lengai, and Kilimanjaro. Based on systematic

Depositional history of Lake Chala (Mt. Kilimanjaro, equatorial East Africa) from high-resolution seismic stratigraphy

<p>Sediments deposited in Lake Chala constitute a high-resolution archive of past climate and environmental change in equatorial East Africa spanning two glacial-interglacial cycles. To correctly

Lithospheric modification by extension and magmatism at the craton-orogenic boundary: North Tanzania Divergence, East Africa

We present a joint analysis of newly acquired gravity and teleseismic data in the North Tanzanian Divergence, where the lithospheric break-up is at its earliest stage. The impact of a mantle



Volcano-tectonic evolution of the Chyulu Hills and implications for the regional stress field in Kenya

The 1.4 Ma to Holocene volcanic eruptive centers and flows in the Chyulu Hills, southeastern Kenya, range in composition between foidites and alkali basalts; they record the relation between linear

Age of Fault Movements in Tanzanian Sector of East African Rift System

THE Neogene volcanic province of northern Tanzania is a southerly extension of the more extensive volcanic areas of Ethiopia and Kenya. It stands astride the Eastern Rift Valley and represents a

Eruptive and structural history of Teide Volcano and rift zones of Tenerife, Canary Islands

The Teide and Pico Viejo stratocones and the Northwest and Northeast Rifts are products of the latest eruptive phase of the island of Tenerife, initiated with the lateral collapse of its northern

Tectonic development of the northern Taiizaiiian sector of the East African Rift System

The Eastern Branch of the East African Rift System diverges from a single, c. 50 km wide rift in southern Kenya to a c. 200 km wide zone in northern Tanzania, where it is comprised of three distinct

40Ar/39Ar and K-Ar chronology of Pleistocene glaciations in Patagonia

During the Pleistocene, east of Lago Buenos Aires, Argentina, at 46.5 °S, at least 19 terminal moraines were deposited as piedmont glaciers from the Patagonian ice cap advanced onto the semi-arid

Volcanic chronology of the Men–Kilimanjaro region, Northern Tanzania

New conventional K-Ar dates for volcanic rocks from a recently mapped area in northern Tanzania, which includes the large volcano Meru, confirm rift-faulting episodes around 2.1 Ma and 1.2 Ma.

Rifting Archaean lithosphere: the Eyasi-Manyara-Natron rifts, East Africa

Long (>50km) normal faults bound one or both sides of narrow basins within the East African Rift System, but the dimensions and internal geometry of individual basins vary along its length. We