Mantle sources of ocean islands basalts revealed from noble gas isotope systematics

JMD Day, TD Jones, RW Nicklas - Chemical Geology, 2022 - Elsevier
Noble gas isotope systematics, particular those of He, have been fundamental in showing
that some ocean island basalts (OIB) were sourced from deep mantle plumes. Relationships …

Initiation of the western branch of the East African Rift coeval with the eastern branch

EM Roberts, NJ Stevens, PM O'Connor, P Dirks… - Nature …, 2012 - nature.com
Abstract The East African Rift System transects the anomalously high-elevation Ethiopian
and East African plateaux that together form part of the 6,000-km-long African superswell …

The Cenozoic magmatism of East Africa: part V–magma sources and processes in the East African Rift

TO Rooney - Lithos, 2020 - Elsevier
The generation of magmas in the East African Rift System (EARS) is largely the result of
either:(A) melting of easily fusible compositions located within the lithospheric mantle due to …

Displaced cratonic mantle concentrates deep carbon during continental rifting

JD Muirhead, TP Fischer, SJ Oliva, A Laizer, J van Wijk… - Nature, 2020 - nature.com
Continental rifts are important sources of mantle carbon dioxide (CO2) emission into Earth's
atmosphere,–. Because deep carbon is stored for long periods in the lithospheric mantle …

The evolution of mantle plumes in East Africa

SJ Chang, E Kendall, A Davaille… - Journal of Geophysical …, 2020 - Wiley Online Library
Global tomography models show a large low‐velocity anomaly extending from the core‐
mantle boundary (CMB) beneath South Africa to the upper mantle in East Africa. Although it …

The deep origin of ground fissures in the Kenya Rift Valley

Z Jia, H Wu, J Peng, Q Lu, W Huang, C Liu, F Wang… - Scientific Reports, 2023 - nature.com
Intense volcanic and geothermal activities characterize the Great Rift Valley of East Africa.
Ground fissure disasters of the Great Rift Valley have garnered increasing attention in recent …

Helium and carbon isotope systematics of cold “mazuku” CO2 vents and hydrothermal gases and fluids from Rungwe Volcanic Province, southern Tanzania

PH Barry, DR Hilton, TP Fischer, JM De Moor… - Chemical …, 2013 - Elsevier
We report new helium and carbon isotope (3He/4He and δ13C) and relative abundance
(CO2/3He) characteristics of a suite of 20 gases and fluids (cold mazuku-like CO2 vents …

AFRP20: New P‐Wavespeed Model for the African Mantle Reveals Two Whole‐Mantle Plumes Below East Africa and Neoproterozoic Modification of the Tanzania …

A Boyce, ID Bastow, S Cottaar… - Geochemistry …, 2021 - Wiley Online Library
Africa's Cenozoic tectonism is often attributed to mantle plumes, particularly below East
Africa, but their morphology, number, location, and impact on the African lithosphere are …

New insights into the crust and lithospheric mantle structure of Africa from elevation, geoid, and thermal analysis

J Globig, M Fernàndez, M Torne… - Journal of …, 2016 - Wiley Online Library
We present new crust and lithosphere thickness maps of the African mainland based on
integrated modeling of elevation and geoid data and thermal analysis. The approach …

The Cenozoic magmatism of East Africa: Part II–Rifting of the mobile belt

TO Rooney - Lithos, 2020 - Elsevier
Despite the foundational role East Africa has played in the advancement of our
understanding of continental rifting, there remains substantial ambiguity as to how …