Search Results - "Friend, C. R. L."

Evidence for life on Earth before 3,800 million years ago by Mojzsis, S. J, Arrhenius, G, McKeegan, K. D, Harrison, T. M, Nutman, A. P, Friend, C. R. L

“…It is unknown when life first appeared on Earth. The earliest known microfossils (approximately 3,500 Myr before present) are structurally complex, and if it…”
Get full text

U-Pb zircon dating of basement inliers within the Moine Supergroup, Scottish Caledonides; implications of Archaean protolith ages by Friend, C. R. L, Strachan, Robert A, Kinny, P. D

“…Basement gneiss inliers within the Scottish Caledonides have been conventionally correlated with the Archaean Lewisian Gneiss Complex of the Caledonian…”
Get full text

Comment on “Tectonics of the Isua Supracrustal Belt 1: P‐T‐X‐d Constraints of a Poly‐Metamorphic Terrane” by A. Ramírez‐Salazar et al. and “Tectonics of the Isua Supracrustal Belt 2: Microstructures Reveal Distributed Strain in the Absence of Major Fault Structures” by J. Zuo et al by Nutman, A. P., Friend, C. R. L., Bennett, V. C.

“…The two Isua supracrustal belt area (Greenland) papers by Zuo et al. (2021, https://doi.org/10.1029/2020tc006514) and Ramírez‐Salazar et al. (2021,…”
Get full text

U-Pb geochronology of deformed metagranites in central Sutherland, Scotland; evidence for widespread late Silurian metamorphism and ductile deformation of the Moine Supergroup during the Caledonian orogeny by Kinny, P. D, Strachan, R. A, Friend, C. R. L, Kocks, H, Rogers, G, Paterson, B. A

“…Within the Caledonides of central Sutherland, Scotland, the Neoproterozoic metasedimentary rocks of the Moine Supergroup record NW-directed D2 ductile…”
Get full text

U-Pb isotopic evidence for the accretion of different crustal blocks to form the Lewisian Complex of northwest Scotland by Kinny, P. D., Friend, C. R. L.

“…Single zircon and titanite U-Pb SHRIMP data presented for tonalite-trondhjemiite-granodiorite (TTG) suite gneisses and an ultramafic rock from the northern and…”
Get full text

Late Archaean terrane accretion in the Godthåb region, southern West Greenland by Friend, C. R. L, Nutman, A. P, McGregor, V. R

“…New data are presented from the Archaean high-grade gneiss complex of the Godthab region of southern West Greenland, which show that discrete tectonic units…”
Get full text

U-Pb geochronology of late Neoproterozoic augen granites in the Moine Supergroup, NW Scotland; dating of rift-related, felsic magmatism during supercontinent break-up? by Kinny, P. D, Strachan, R. A, Kocks, H, Friend, C. R. L

“…Within the Caledonides of Caithness, Scotland, the Neoproterozoic metasedimentary rocks of the Moine Supergroup are intruded by minor sheets of strongly…”
Get full text

U-Pb geochronology of regional migmatites in East Sutherland, Scotland; evidence for crustal melting during the Caledonian Orogeny by Kinny, P. D, Friend, C. R. L, Strachan, R. A, Watt, G. R, Burns, I. M

“…Moine semi-pelitic metasediments near the base of the Kirtomy and Naver nappes, northern Scotland, were partially melted syn-tectonically under low T, high…”
Get full text

U-Pb geochronology of the Fort Augustus granite gneiss; constraints on the timing of Neoproterozoic and Palaeozoic tectonothermal events in the NW Highlands of Scotland by Rogers, G, Kinny, P. D, Strachan, R. A, Friend, C. R. L, Paterson, B. A

“…The West Highland granite gneiss suite in Inverness-shire, Scotland, represents a series of S-type, anatectic granites formed by partial melting of host…”
Get full text

Three metamorphic events recorded in a single garnet: Integrated phase modelling, in situ LA-ICPMS and SIMS geochronology from the Moine Supergroup, NW Scotland by CUTTS, K. A., KINNY, P. D., STRACHAN, R. A., HAND, M., KELSEY, D. E., EMERY, M., FRIEND, C. R. L., LESLIE, A. G.

“…In situ LA‐ICP‐MS monazite geochronology from a garnet‐bearing diatexite within the Moine Supergroup (Glenfinnan Group) NW Scotland records three temporally…”
Get full text

Seawater-like trace element signatures (REE + Y) of Eoarchaean chemical sedimentary rocks from southern West Greenland, and their corruption during high-grade metamorphism by Friend, C. R. L., Nutman, A. P., Bennett, V. C., Norman, M. D.

“…Modern chemical sediments display a distinctive rare earth element + yttrium (REE + Y) pattern involving depleted LREE, positive La/La* SN , Eu/Eu* SN , and Y…”
Get full text

Proposal for a terrane-based nomenclature for the Lewisian gneiss complex of NW Scotland by Kinny, P. D, Friend, Clark R. L, Love, G. J

“…The current nomenclature for the Lewisian Gneiss Complex has evolved from lithological and structural correlations made prior to any dating. Initial (flawed)…”
Get full text

A reappraisal of the Lewisian Gneiss Complex: geochronological evidence for its tectonic assembly from disparate terranes in the Proterozoic by Friend, C., Kinny, P.

“…New U-Pb single-zircon geochronology undertaken on tonalitic gneisses, granite sheets, migmatites and metasediments from the Lewisian Gneiss Complex on the…”
Get full text

Response of zircon U-Pb isotopes and whole-rock geochemistry to CO2 fluid-induced granulite-facies metamorphism, Kabbaldurga, Karnataka, South India by FRIEND, C. R. L, NUTMAN, A. P

Get full text

Timing of magmatism and metamorphism in the Gruinard Bay area of the Lewisian Gneiss Complex: comparisons with the Assynt Terrane and implications for terrane accretion by Love, G. J., Kinny, P. D., Friend, C. R. L.

“…U-Pb zircon data from selected gneiss samples provide estimates of the timing of igneous protolith emplacement and granulite facies metamorphism in the…”
Get full text

Provenance of the Moine Supergroup of NW Scotland; evidence from geochronology of detrital and inherited zircons from (meta)sedimentary rocks, granites and migmatites by Friend, C. R. L, Strachan, R. A, Kinny, P. D, Watt, G. R

“…Detrital and inherited zircons from rocks of the Moine Supergroup from structural and stratigraphic positions above and below the Sgurr Beag and Naver thrusts…”
Get full text

New field and geochemical evidence from vitrified forts in South Morar and Moidart, NW Scotland: further insight into melting and the process of vitrification by Friend, C.R.L., Dye, J., Fowler, M.B.

“…New field and laboratory work has been carried out on two vitrified forts, Rhubh Aird Ghamhsgail near Arisaig and The Torr near Acharacle. Fieldwork confirms…”
Get full text

Experimentally produced glass compared with that occurring at The Torr, NW Scotland, UK: vitrification through biotite melting by Friend, C.R.L., Charnley, N.R., Clyne, H., Dye, J.

“…It is proposed that the vitrification in some Iron Age forts in NW Scotland can be explained through decomposition of micas (largely biotite) giving melts that…”
Get full text

Timing of magmatism and metamorphism in the Gruinard Bay area of the Lewisian Gneiss Complex: comparison with the Assynt Terrane and implications for terrane accretion—reply by Friend, C. R. L., Kinny, P. D., Love, G. J.

Get full text

Late Archean Prograde Amphibolite- to Granulite-Facies Relations in the Fiskenæsset Region, Southern West Greenland by McGregor, V. R., Friend, C. R. L.

“…The Tasiusarsuaq terrane in the Fiskenæsset-Nuuk region of southern West Greenland is interpreted as a late Archean tilted crustal section modified by…”
Get full text