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Don L. Anderson


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Ying Zhou



Control of pre-rift lithospheric structure on the architecture and evolution of continental rifts: insights from the Main Ethiopian Rift, East Africa

G. Corti, P. Molin, A. Sembroni, I.D. Bastow & D. Keir



Warren Bell Hamilton
May 13, 1925 – October 26, 2018


Vienna, Austria, 7-12 April 2019

Abstract submission deadline: 10 January, 2019

TS6.2: The impact of structural inheritance across spatial and temporal scales

TS6.4: Breaking and moving plates apart: linking plate kinematics to lithospheric processes and paleogeography

TS6.6: Rifted margins: Geological and geophysical observations, interpretations and their uncertainty with respect to the understanding of their evolutions and architectures

TS9.5: Hotspots, LIPs and LLSVPs: a global investigation with joint constraints from geochemistry, seismology and geodynamics

TS9.8: Crust-Lithosphere-Asthenosphere Interplay, Deformation, and Dynamics

TS9.11: Vertical motions away from plate boundaries


Mid-Lithospheric Discontinuity and a new hypothesis for oceanic plateau genesis

Zhensheng (Jason) Wang, T.M. Kusky & F.A. Capitanio


AGU 2018 Fall Meeting Sessions

Session TO11
Current understanding of large igneous provinces, hotspot tracks, and mantle plumes

Conveners: William Sager, Anthony Koppers, Cornelia Class & Trond Torsvik

Session V007
Basaltic magmatism: Constraints from trace elements

Conveners: Shichun Huang, Kirsten P Nicolaysen, Alberto E Saal & Tanya Furman


Museo Universitario di Scienze della Terra

Earth Sciences University Museum, Univ. Rome


Geophysical modeling informs us about the resolution of deep plume tails

R. Maguire


Stagnant Lid Tectonics: Perspectives from Silicate Planets, Dwarf Planets, Large Moons, and Large Asteroids

R.J. Stern, T. Gerya, P. J. Tackley


Hotspot paths below Arabia and the Horn of Africa: evidence and consequences

S. Vicente de Gouveia, J. Besse, D. Frizon de Lamotte, M. Greff-Lefftz, M. Lescanne, F. Gueydan & F. Leparmentier


Intraplate deformation of oceanic crust in the West Somali Basin

D. Sauter, J.C. Ringenbach, M. Cannat, T. Maurin, G. Manatschal, K.G. McDermott


Origin of high-Mg melts by volatile fluxing without significant excess of temperature

A.V. Ivanov, S.B. Mukasa, V.S. Kamenetsky, M. Ackerson, E.I. Demonterova, B.G. Pokrovsky, N.V. Vladykin, M.V. Kolesnichenko, K.D. Litasov, D.A. Zedgenizov


Post-orogenic unrooting and collapse in double suture systems: insights from the Western Dabie Orogen

Liming Dai, Sanzhong Li, Zhong-Hai Li, I. Somerville & Xiaochun Liu


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It is well-known that time-progressive volcanic trails are considered by many to be diagnostic of fixed mantle plumes, and that non-time progression is not considered to weigh against the plume hypothesis, but time progression in the opposite direction from that expected???? (Sinton, C. W., F. Hauff, K. Hoernle, and R. Werner (2018), Age progressive volcanism opposite Nazca plate motion: Insights from seamounts on the northeastern margin of the Galapagos Platform, Lithos, 310-311, 342-354.)

Dear WM, The first of the five spaces of the Museo Universitario di Scienze della Terra (MUST: the new Earth Sciences University Museum) opens May 19th, 2018, part of the European Night of the Museums. The exhibition "Earth: What a surprise!" launches the Atrium as a multifunctional area that will host congresses, workshops, exhibitions and cultural events. It will comprise the first step on the road to opening the largest Italian museum dedicated to Earth Sciences. More than 150,000 samples of minerals, rocks and fossils, rare scientific instruments, ancient books and thematic maps will soon be on display in a space  larger than 4000 m2. We invite you to the MUST Atrium! You will find surprises about our planet’s history, the resources we use, the hazards and risks caused by its dynamic state, and the magic of new discoveries!

For information, please email must@uniroma1.it
or
michele.lustrino@uniroma1.it

Michele Lustrino, Director Earth Science Museum, Univ. Rome


Dear WM, Water in olivine itself is generally low. As described in our recent paper on volatile concentrations in olivine-hosted melt inclusions from meimechite and melanephelinite lavas of the Siberian Traps, only high-Fo olivines contain few ppm of water according to FTIR measurements. However, in the water in olivine-hosted melt inclusions, which represent trapped melts at depth of olivine crystallisation, water is high. Examples of high water in olivine-hosted melt inclusions are rare and most are from arc basalts. Technically, such studies are hard. For flood basalts there are only three publications that describe with high water in olivine-hosted melt inclusions. These use the technique of melt-inclusion homogenization at high pressure in piston-cylinder apparatus, which was suggested by Sam Mukasa. Two of these studies were of Columbia River and Yellowstone basalts and our study was for the Siberian Traps. Use of the high-pressure homogenisation method is uncommon, but as we show in our study, it is probably essential to prevent water loss during melt homogenisation in the laboratory. A few publications attempt to measure water in olivine- or other mineral-hosted melt inclusions and conclude that water is low. All these publications used homogenisation at 1 atm and probably suffered from water loss in their experiments. Another possibility is that in our study we were simly lucky to find a nearly undegassed sample, whereas other studies did not. Water is easily degassed from magma and later from trapped melt inclusions through olivine. Usually only one or two samples are used for melt inclusion studies because it is painstaking and costly. The chance of choosing an inapropriate sample for such a study is thus high. I would also like to highligh a recent paper by Malcolm Hole about Baffin Island and West Greenland picrites which proposes that Baffin picrites are not the same as Siberian picrites and concludes they are not from a mantle plume–Alexei Ivanov


Dear WM, You may be interested in the following thought-provoking passage commenting on the collegiality of some eminent historical scientists–Bruce Julian

"Unlike Fermat, Descartes gave the impression that he was often uninformed of what others had done before him; at least he only rarely mentioned the work of anybody else in his writings. And when he did, it was often in the most unpleasant manner one could imagine: at various times in his life he called his critics "two or three flies," "less than a rational animal," "a little dog," and "extremely contemptible." The actual works of others were often rejected in incredibly offensive language, e.g., as being fit only for use as "toilet paper" or, in the case of Fermat, as being "shit."–Paul J. Nahin"


 

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