Precambrian Research Precambrian Research 102 (2000) 303-304 www.elsevier.com/locate/precamres Contents Vol. 102 Strain pattern and late Precambrian deformation history in southern Madagascar J.-E. Martelat, J.-M. Lardeaux, C. Nicollet and R. Rakotondrazafy .................4.4. A crustally contaminated komatiitic dyke-sill-lava complex, Abitibi greenstone belt, Ontario rca: ee e.g kg Sik ee 0 a ke eS 8 OR ee ee ee eee 21 Metamorphic evolution of Pan-African granulite facies metapelites from Southern Madagascar e Seeeitis aic eu CII I a ag ace 6 ee Oa ee se oe oe ee U-Pb and Pb-Pb age constraints on Paleoproterozoic magmatism, deformation and gold mineraliza- tion in the Omai area, Guyana Shield C. Nororess, O.WV. Gewese, &.7.0. Goooner and A. Must. . i... ccc ees was bee caw ee’ 69 Nd and Sr isotopic investigation of the Archean—Proterozoic boundary in north eastern Tanzania: constraints on the nature of Neoproterozoic tectonism in the Mozambique Belt eas TS se} a heer ew ee bce ae aw 2 aa ee ae oe eee 87 Dome emplacement and formation of kilometre-scale synclines in a granite—greenstone terrain (Quadrilatero Ferrifero, southeastern Brazil) pg EF eee ar are ee ee ie Bee re ay gn ee 99 Ultrastructure and morphology of Chuaria circularis () from the Neoproterozoic Visingso Group, Sweden RE NS i a Sg a eel a Ra ee Wb ee ee eR a ee ae eee 123 Seismic imaging in the frontal part of the Sveconorwegian orogen, south-western Sweden C. Julin, C.-1. Woeltoren and 0.6. Stephens. 6. cc ce mee eee ew een ee 135 Geochronological constraints for a two-stage history of the Albany-—Fraser Orogen, Western Australia Seale: aes tenuis OD UE rn RON oa sa atl oe wk we gw ee esA ce elke ee eee eee 155 New ideas on the Proterozoic-Early Palaeozoic evolution of NW iberia: insights from U-Pb detrital zircon ages J. Fernandez-Suarez, G. Gutiérrez-Alonso, G.A. Jenner and M.N. Tubrett.............. 185 Pb and Nd isotopic constraints on Paleoproterozoic crustal evolution of the northeastern Yeongnam massif, South Korea ru, Gee orn Se UN Ts Pn, 5 ne ko OS ee Cee ne Meee 6 A ee eee 207 Geochemical and Nd-Pb-O isotope systematics of granites from the Taltson Magmatic Zone, NE _ Alberta: implications for early Proterozoic tectonics in western Laurentia S.K. De, T. Chacko, R.A. Creaser and K. Muehlenbachs. .........0.0..02.4 .e .ea e 221 Geochemical and Sm-—Nd isotopic study of amphibolites in the Cathaysia Block, southeastern China: evidence for an extremely depleted mantle in the Paleoproterozoic X.-H. Li, M. Sun, G.-J. Wei, Y. Liu, C.-Y. Lee and J. Malpas. ................0.0008. 251 Volume Contents 102 (2000) 303—304 Nd and Pb isotopic evidence for provenance and post-depositional alteration of the Paleoprotero- zoic Huronian Supergroup, Canada S.M. McLennan, A. Simonetti and S.L. Goldstein The roots of the Dabieshan ultrahigh-pressure metamorphic terrane: constraints from geochemistry and Nd-Sr isotope systematics C. Ma, C. Ehlers, C. Xu, Z. Li and K. Yang Volume contents