Zobrazeno 1 - 10
of 45
pro vyhledávání: '"Roger Key"'
Publikováno v:
Astronomy Education Journal. 1
A lab activity for teaching students the fundamentals of statistical analysis by timing pulsar periods is described. The electromagnetic pulses of pulsars have been mapped to sound and uploaded on social media channels, allowing students to “listen
Autor:
G. Kamihanda, Nick M.W. Roberts, Abdulkarim Mruma, Sperartus Kajara, Joachim Jacobs, W. McCourt, Hamisi Saidi, Yokbeth Myambilwa, Zortosy Maganga, Ian L. Millar, Fabian Mbawala, Fadile Moses, Gerrit S. de Kock, Matthew S.A. Horstwood, Petro Nyanda, Nick Baglow, Khalid Nyoka, Alphonce M. Bushi, Christopher Spencer, Philip Momburi, Robert J. Thomas, Nelson Boniface, Roger Key, Louise Hollick
Publikováno v:
Precambrian Research. 277:47-67
Geological mapping and zircon U–Pb/Hf isotope data from 35 samples from the central Tanzania Craton and surrounding orogenic belts to the south and east allow a revised model of Precambrian crustal evolution of this part of East Africa. The geochro
Autor:
Dan Lapworth, K.V. Knights, Simon J. Kemp, Christopher C. Johnson, Michael Adekanmi, Tunde Arisekola, Roger Key, Matthew S.A. Horstwood, Martin R. Gillespie, Michael J. Watts
Publikováno v:
Applied Geochemistry. 27:1525-1539
Sixteen hundred stream sediments (
Autor:
J. Ridgway, Tunde Arisekola, P.E.J. Pitfield, Roger Key, M. Eklund, Dan Lapworth, Christopher C. Johnson, O. A. Okunlola, Emmanuel Ayoade, Simon J. Kemp, Michael J. Watts, Birgitta Backman, K.V. Knights, Robert Lister, Michael Adekanmi, Paul Everett
Publikováno v:
Applied Geochemistry. 27:1035-1052
This paper provides an overview of regional geochemical mapping using stream sediments from central and south-western Nigeria. A total of 1569 stream sediment samples were collected and 54 major and trace elements determined by ICP-MS and Au, Pd and
Autor:
Christopher J. Potter, A.V. Ralison, Matthew S.A. Horstwood, D. Waele, E. A. O'connor, Ronald J. Thomas, James E. Conrad, P.E.J. Pitfield, Roger Key, Gregory J. Walsh, John Encarnacion, M. Rabarimanana, J. M. Rafahatelo, David I. Schofield, David J. Lidke, Richard Smith, Michael Styles, T. Randriamananjara, Wilfried Bauer, Kathryn Goodenough
Publikováno v:
Geological Society, London, Special Publications. 357:49-68
Our recent geological survey of the basement of central and northern Madagascar allowed us to re-evaluate the evolution of this part of the East Africa–Antarctica Orogen (EAAO). Five crustal domains are recognized, characterized by distinctive lith
Autor:
A.S.D. Walker, J. Farr, J. Sharrock, I. McGEORGE, Roger Key, M. Koketso, G. Pouliquen, G. Gunn
Publikováno v:
South African Journal of Geology. 113:381-400
The Molopo Farms Complex is an extremely poorly exposed, major, ultramafic-mafic layered intrusion straddling the southern border of Botswana with South Africa. It lies within the south-western part of the ~2.0 Ga large igneous province of southern a
Autor:
Gregory J. Walsh, David J. Lidke, Roger Key, Wilfried Bauer, Ronald J. Thomas, M. Rabarimanana, David I. Schofield, B. De Waele, Kathryn Goodenough, T. Randriamananjara, A.V. Ralison, J. M. Rafahatelo, P.E.J. Pitfield
Publikováno v:
Precambrian Research. 182:187-203
The Antongil Craton, along with the Masora and Antananarivo cratons, make up the fundamental Archaean building blocks of the island of Madagascar. They were juxtaposed during the late-Neoproterozoic to early Palaeozoic assembly of Gondwana. In this p
Autor:
David I. Schofield, B. De Waele, Roger Key, M. Rabarimanana, T. Randriamananjara, Kathryn Goodenough, Wilfried Bauer, R.D. Tucker, J. M. Rafahatelo, A.V. Ralison, Ronald J. Thomas
Publikováno v:
Lithos. 116:18-34
Late tectonic, post-collisional granite suites are a feature of many parts of the Late Neoproterozoic to Cambrian East African Orogen (EAO), where they are generally attributed to late extensional collapse of the orogen, accompanied by high heat flow
Autor:
Terje Thorsnes, F. Njange, Richard Smith, Roger Key, E.B. Zandamela, O. M. Saether, John H. Powell, M. Smelror
Publikováno v:
South African Journal of Geology. 111:89-108
A revised formal lithostratigraphy for the Mesozoic to Cenozoic succession of the onshore portion of the Rovuma Basin in northern Mozambique replaces a previous mixture of informal lithostratigraphical and biostratigraphical names. The following nine
Autor:
P. J. Henney, Susan C. Loughlin, M. Del Rio, P.E.J. Pitfield, D. P. F. Darbyshire, Martin R. Gillespie, Quentin Crowley, Roger Key, Matthew S.A. Horstwood
Publikováno v:
Geological Society, London, Special Publications. 297:33-52
Two domains have previously been recognized in the Archaean Reguibat Shield of NW Mauritania, based primarily on their gross lithological differences (Rocci et al., 1991). New fieldwork has identified a major ductile shear zone (Tâcarât -Inemmauden