James Roberts
机构: Senior Lecturer, University of Pretoria
每年引用次数
引用次数
引用: 974
H-指数: 17
I10-指数 : 22
出版物: 39
Pulses of plagioclase-laden magmas and stratigraphic evolution in the upper zone of the Bushveld Complex, South Africa
Qian Yuan , Olivier Namur , Lennart Alexander Fischer , Richard James Roberts
Journal of Petrology 58 ( 8) 1619 -1643
19
2017
The Seiland Igneous Province, northern Norway: age, provenance, and tectonic significance
Richard James Roberts
18
2007
Apatite in the Upper Zone of the Bushveld (Western Limb)-evidence for a rejuvenated magma at the height of Layer 21?
Richard James Roberts , Tawnee Britt , Callum Hetherington
EGU General Assembly Conference Abstracts EGU22 -11489
2022
LEWIS D. ASHWAL** and DONALD M. RAMSAY**** ABSTRACT. The Kalak Nappe Complex in the northern Scandinavian Caledonides has historically been interpreted as representing the pre-Caledonian margin of Baltica consisting of a Precambrian basement and a late Precambrian to Cambrian cover
FERNANDO CORFU , R JAMES ROBERTS , TROND H TORSVIK
The American Journal of Science 307 434 -458
2007
Clinopyroxene megacrysts from Marion Island, Antarctic Ocean: evidence for a late stage shallow origin
R. James Roberts , Keabetswe D. Lehong , Andries E. J. Botha , Gelu Costin
Mineralogy and Petrology 113 ( 2) 155 -167
3
2019
Reply to the comment by D. W. Hedding
R. James Roberts , Keabetswe D. Lehong , Andries E. J. Botha , Gelu Costin
Mineralogy and Petrology 114 ( 4) 361 -361
2020
A Nuclear Magnetic Resonance study: Implications for coal formation in the Witbank Coalfield, South Africa
Ofentse M Moroeng , Nicola J Wagner , D Jaco Brand , R James Roberts
International Journal of Coal Geology 188 145 -155
9
2018
Immiscible iron- and silica-rich liquids in the Upper Zone of the Bushveld Complex
Lennart A. Fischer , Meng Wang , Bernard Charlier , Olivier Namur
Earth and Planetary Science Letters 443 108 -117
29
2016
SELF-HEATING POTENTIAL OF COAL INFERRED FROM ELEMENTAL DATA - A CASE-STUDY OF THE WITBANK COALFIELD OF SOUTH AFRICA
Ofentse M Moroeng , R James Roberts , John P Bussio , Roger D Dixon
Energy & Fuels 31 ( 11) 11811 -11817
2
2017
Characterization of coal using electron spin resonance : implications for the formation of inertinite macerals in the Witbank Coalfield, South Africa
Ofentse M Moroeng , Jonathan M Keartland , R James Roberts , Nicola J Wagner
International Journal of Coal Science & Technology 5 ( 3) 385 -398
4
2018
Comparative study of a vitrinite-rich and an inertinite-rich Witbank coal (South Africa) using pyrolysis-gas chromatography
Ofentse M Moroeng , Vimbai Mhuka , Mathew M Nindi , R James Roberts
International Journal of Coal Science & Technology 6 ( 4) 621 -632
2019
Using δ15N and δ13C and nitrogen functionalities to support a fire origin for certain inertinite macerals in a No. 4 Seam Upper Witbank coal, South Africa
Ofentse M Moroeng , Nicola J Wagner , Grant Hall , R James Roberts
Organic Geochemistry 126 23 -32
7
2018
Crustal processing: the Finnmarkian orogen reassessed
F Corfu , RJ Roberts , TH Torsvik , TB Andersen
Geochimica et Cosmochimica Acta 68 ( 11) A624 -A624
9
2004
The Seiland Igneous Province: Provenance and geodynamic significance
RJ Roberts , F Corfu , LD Ashwal , TH Torsvik
Geochimica et Cosmochimica Acta 68 ( 11) A594 -A594
1
2004
Geochronology of large zircons from nepheline-bearing gneisses as constraints on tectonic setting: an example from southern Malawi
LD Ashwal , RA Armstrong , RJ Roberts , MD Schmitz
Contributions to Mineralogy and Petrology 153 389 -403
6
2007
The Early Carboniferous Magerøy dykes, northern Norway: palaeomagnetism and palaeogeography
RJ Roberts , TH Torsvik , TB Andersen , EF Rehnstrom
Geological Magazine 140 ( 4) 443 -451
20
2003
Exotic terranes in the Finnmarkian Caledonides: U–Pb evidence for Peri-gondwanan and Laurentian elements
F Corfu , RJ Roberts , M Gerber , TH Torsvik
Abstracts and Proceedings of the Geological Society of Norway. Norwegian Journal of Geology 1 22 -22
14
2005
Redefining the magmatic evolution of the Kalak Nappe Complex
RJ Roberts , F Corfu , TH Torsvik , DM Ramsay
Geologiska Föreningen i Stockholm, Abstract volume, The 26th Nordic Geological Winter Meeting, Stockholm 126 84 -84
12
2004
International Symposium on sea ranching of cod and other marine fish species, Arendal, Norway, 15-18 June 1993.
SJ de Groot , RJ Roberts
25 ( SUP 1) 264 pp. -264 pp.
1994
Evaluation of the Phase Composition, Crystallinity, and Trace Isotope Variation of SiC in Experimental TRISO Coated Particles
Johan P. R. de Villiers , James Roberts , Noko Ngoepe , Alison S. Tuling
Journal of Engineering for Gas Turbines and Power 131 ( 6) 062904
2
2009