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Journal articles on the topic 'North Tanzanian Divergence'

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1

Mana, Sara, Tanya Furman, Brent D. Turrin, Mark D. Feigenson, and Carl C. Swisher. "Magmatic activity across the East African North Tanzanian Divergence Zone." Journal of the Geological Society 172, no. 3 (2015): 368–89. http://dx.doi.org/10.1144/jgs2014-072.

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2

Plasman, Matthieu, Sophie Hautot, Pascal Tarits, et al. "Lithospheric Structure of a Transitional Magmatic to Amagmatic Continental Rift System—Insights from Magnetotelluric and Local Tomography Studies in the North Tanzanian Divergence, East African Rift." Geosciences 9, no. 11 (2019): 462. http://dx.doi.org/10.3390/geosciences9110462.

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Continental break-up is controlled by several parameters and processes (rheology, inherited structures, magmatism, etc). Their impact, chronology and interactions are still poorly known and debated, particularly when rifting interacts with cratons. In order to better understand the rifting initiation in a cratonic lithosphere, we analysed 22 magnetotelluric (MT) soundings collected along two East-West profiles in two different rift segments of the North Tanzanian Divergence. The North Tanzanian Divergence, where the East African Rift is at its earliest stage, is a remarkable example of the tra
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3

Parisi, Laura, Ian Stanistreet, Jackson Njau, Kathy Schick, Nicholas Toth, and Paul Martin Mai. "Seismological Investigations in the Olduvai Basin and Ngorongoro Volcanic Highlands (Western Flank of the North Tanzanian Divergence)." Seismological Research Letters 91, no. 6 (2020): 3286–303. http://dx.doi.org/10.1785/0220200111.

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Abstract We present data and results of a passive seismic experiment that we operated between June 2016 and May 2018 in the Ngorongoro Conservation Area (northern Tanzania), located on the western side of the eastern branch of the Eastern African Rift (EAR) system. The motivation for this experiment is twofold: (1) investigating the extension of the Olduvai basin, referred to also as the “Cradle of Human Mankind,” as it hosted a variety of paleoenvironments exploited by hominins during their evolution; and (2) studying the link between the fault system in the main EAR and in its western flank.
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4

Dobrynina, A. A., J. Albaric, A. Deschamps, et al. "Seismic wave attenuation in the lithosphere of the North Tanzanian divergence zone (East African rift system)." Russian Geology and Geophysics 58, no. 2 (2017): 253–65. http://dx.doi.org/10.1016/j.rgg.2016.03.016.

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5

Le Gall, Bernard, Remigius Gama, Alexander Koptev, et al. "The anomalously-propagating South Kenya rift in the context of the North Tanzanian Divergence zone, East Africa." Tectonophysics 814 (September 2021): 228968. http://dx.doi.org/10.1016/j.tecto.2021.228968.

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6

Albaric, J., J. Perrot, J. Déverchère, et al. "Contrasted seismogenic and rheological behaviours from shallow and deep earthquake sequences in the North Tanzanian Divergence, East Africa." Journal of African Earth Sciences 58, no. 5 (2010): 799–811. http://dx.doi.org/10.1016/j.jafrearsci.2009.09.005.

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7

Mana, S., T. Furman, M. J. Carr, et al. "Geochronology and geochemistry of the Essimingor volcano: Melting of metasomatized lithospheric mantle beneath the North Tanzanian Divergence zone (East African Rift)." Lithos 155 (December 2012): 310–25. http://dx.doi.org/10.1016/j.lithos.2012.09.009.

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8

Baptiste, Virginie, Andréa Tommasi, Alain Vauchez, Sylvie Demouchy, and Roberta L. Rudnick. "Deformation, hydration, and anisotropy of the lithospheric mantle in an active rift: Constraints from mantle xenoliths from the North Tanzanian Divergence of the East African Rift." Tectonophysics 639 (January 2015): 34–55. http://dx.doi.org/10.1016/j.tecto.2014.11.011.

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9

Clutier, A., S. Gautier, and C. Tiberi. "Hybrid local and teleseismic P-wave tomography in North Tanzania: role of inherited structures and magmatism on continental rifting." Geophysical Journal International 224, no. 3 (2020): 1588–606. http://dx.doi.org/10.1093/gji/ggaa538.

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SUMMARY While local earthquake tomography is typically used to image the crust, this technique has restricted depth penetration due to short receiver-source distances. Regional tomography however aims to image the upper mantle from teleseismic events but suffers from poor resolution from 0 down to 40 km depth. We present here a hybrid method that combines the two approaches taking advantage of the short-wavelength resolution within the crust to better constrain the ray path at depth, and thus to improve the lithospheric imaging. Using this new method enhances the continuity or disruption of ma
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10

Tiberi, C., S. Gautier, C. Ebinger, et al. "Lithospheric modification by extension and magmatism at the craton-orogenic boundary: North Tanzania Divergence, East Africa." Geophysical Journal International 216, no. 3 (2018): 1693–710. http://dx.doi.org/10.1093/gji/ggy521.

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11

Genner, Martin J., Benjamin P. Ngatunga, Semvua Mzighani, Alan Smith, and George F. Turner. "Geographical ancestry of Lake Malawi's cichlid fish diversity." Biology Letters 11, no. 6 (2015): 20150232. http://dx.doi.org/10.1098/rsbl.2015.0232.

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The Lake Malawi haplochromine cichlid flock is one of the largest vertebrate adaptive radiations. The geographical source of the radiation has been assumed to be rivers to the south and east of Lake Malawi, where extant representatives of the flock are now present. Here, we provide mitochondrial DNA evidence suggesting the sister taxon to the Lake Malawi radiation is within the Great Ruaha river in Tanzania, north of Lake Malawi. Estimates of the time of divergence between the Lake Malawi flock and this riverine sister taxon range from 2.13 to 6.76 Ma, prior to origins of the current radiation
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12

Muller, Martin N., Frank W. Marlowe, Revocatus Bugumba, and Peter T. Ellison. "Testosterone and paternal care in East African foragers and pastoralists." Proceedings of the Royal Society B: Biological Sciences 276, no. 1655 (2008): 347–54. http://dx.doi.org/10.1098/rspb.2008.1028.

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The ‘challenge hypothesis’ posits that testosterone facilitates reproductive effort (investment in male–male competition and mate-seeking) at the expense of parenting effort (investment in offspring and mates). Multiple studies, primarily in North America, have shown that men in committed relationships, fathers, or both maintain lower levels of testosterone than unpaired men. Data from non-western populations, however, show inconsistent results. We hypothesized that much of this cross-cultural variation can be attributed to differential investment in mating versus parenting effort, even among
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13

Camberlin, P., B. Fontaine, S. Louvet, P. Oettli, and P. Valimba. "Climate Adjustments over Africa Accompanying the Indian Monsoon Onset." Journal of Climate 23, no. 8 (2010): 2047–64. http://dx.doi.org/10.1175/2009jcli3302.1.

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Abstract Rainfall and circulation changes accompanying the Indian monsoon onset are examined, focusing on the African continent and neighboring areas. The Indian Meteorological Department official monsoon onset dates over Kerala (MOK; on average on 1 June) are used. Composites are formed at a pentad (5 days) time scale to compare pre- and postonset conditions. Climate Prediction Center (CPC) Merged Analysis of Precipitation (CMAP) data for 1979–2007 indicate that a substantial rainfall decrease over several parts of Africa is associated with MOK. Significant rainfall anomalies, after removal o
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14

Baudouin, Céline, and Fleurice Parat. "Phlogopite-Olivine Nephelinites Erupted During Early Stage Rifting, North Tanzanian Divergence." Frontiers in Earth Science 8 (July 14, 2020). http://dx.doi.org/10.3389/feart.2020.00277.

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15

Baudouin, Céline, Fleurice Parat, Carole M. M. Denis, and Fredrik Mangasini. "Nephelinite lavas at early stage of rift initiation (Hanang volcano, North Tanzanian Divergence)." Contributions to Mineralogy and Petrology 171, no. 7 (2016). http://dx.doi.org/10.1007/s00410-016-1273-5.

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16

"SEISMIC WAVE ATTENUATION IN THE LITHOSPHERE OF THE NORTH TANZANIAN DIVERGENCE ZONE (East African rift system)." Геология и геофизика, no. 2 (2017). http://dx.doi.org/10.15372/gig20170209.

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17

Delcamp, A., D. Delvaux, S. Kwelwa, A. Macheyeki, and M. Kervyn. "Sector collapse events at volcanoes in the North Tanzanian divergence zone and their implications for regional tectonics." Geological Society of America Bulletin, June 30, 2015, B31119.1. http://dx.doi.org/10.1130/b31119.1.

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18

Zaitsev, Anatoly N., Andrei A. Arzamastsev, Michael A. W. Marks, et al. "Hybridisation of alkali basaltic magmas: a case study of the Ogol lavas from the Laetoli area, Crater Highlands (Tanzania)." Journal of Petrology, April 28, 2021. http://dx.doi.org/10.1093/petrology/egab035.

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Abstract The southern part of the eastern branch of the East African Rift is characterized by extensive volcanic activity since the late Miocene. In the Crater Highlands, part of the North Tanzanian Divergence zone, effusive and pyroclastic rocks reflect nephelinitic and basaltic compositions that formed between 4.6 and 0.8 Ma. The former are best represented by the Sadiman volcano (4.6–4.0 Ma) and the latter occur in the giant Ngorongoro crater (2.3–2.0 Ma), the Lemagarut volcano (2.4–2.2 Ma) and as a small volcanic field in the Laetoli area (2.3 Ma), where basaltic rocks known as Ogol lavas
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19

Taylor, Louis J., Marisol I. Dothard, Meagan A. Rubel, et al. "Redondovirus diversity and evolution on global, individual, and molecular scales." Journal of Virology, August 18, 2021. http://dx.doi.org/10.1128/jvi.00817-21.

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Redondoviridae is a newly-established family of circular Rep-encoding single stranded (CRESS) DNA viruses found in the human oro-respiratory tract. Redondoviruses were previously found in ∼15% of respiratory specimens from US urban subjects; levels were elevated in individuals with periodontitis or critical illness. Here, we report higher redondovirus prevalence in saliva samples: four rural African populations showed 61-82% prevalence, and an urban US population showed 32% prevalence. Longitudinal, limiting-dilution single-genome sequencing revealed diverse strains of both redondovirus specie
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