 | | Journal (article/letter/editorial) | | nephelinites and carbonatites of the Buhera district, SE Zimbabwe R.E. Harmer a,Ł , C.A. Lee b , B.M....March 1998 Abstract In the Buhera district of SE Zimbabwe the Dorowa and Shawa complexes are composed of...isotopic data are presented which reveal that the Buhera nephelinites have signatures similar to, but more...of 22 to 15 at "Sr of C8 to C20. By contrast the Shawa carbonatites are not isotopically anomalous with...relationships provide unequivocal evidence that the Buhera nephelinites and carbonatites were derived from |  | | Journal (article/letter/editorial) | | distinguished by the sharply discordant occurrence of the complex as a whole and of each of the magmatic bodies of...element determining the structure of a magmatic ring complex is ring faults. These are accompanied and supplemented...the formation of ring intrusives within a single complex did not occur simultaneously, but successively...ring. Thus, for example, in the Okonjeje igneous complex (Damaraland Province, southwestern Africa; Simpson...characteristic example is the Chikala Hill magmatic complex (fig. 4) in the province of Chilwa, Malawi. Of |  | | Book (edition) | | detailed geological survey of the Alné Island complex and announced his results in a series of papers...completed most of the field work on the Iron Hill complex of Gunnison County, Colorado, in 1912-1913. Although...fairly pure calcite (Garson and Smith, 1958). The complex was first studied by F. Dixey, and it was he who...detailed and complete studies of a carbonatitic complex. Between 1950 and 1956 there took place the most...presented by Leonardos (1956A, B). The Fen, Norway, complex has been restudied by Saether (1958); that of the |  | | Journal (volume) | | carbonatite complex is the w est ernmost deposit in the K ola a lkali ne rock province. The complex comprises...area and a magmat ic core. The evolution of th e complex star te d with an u ltr am af ic instrusion that...bonatite intrusion completed the evolu t ion of the complex. The magmatic carbonatites cryst allized during...years after the discovery in 1967 of the So kli complex (F ig. 1) by the steel company Rautaruukki Oy,...(85- 95 vol-O/o). The locat ion of the S okli complex in the alkaline rock p rovince of the Ko la Peninsula |  | | Book | | (0. K.), 1. KORNPROBST (France), 1. D. KRAMERS (Zimbabwe), M. J. LE BAS (0. K.), F. E. LLOYD (0. K.), R...Clinopyroxene ................................... 7.5 Phlogopite with mol Na20+K20>AI203 ............ 7.6 Glasses......................... 5.1 The Thghouaji Ring-Complex ...................... 5.2 Conclusion ...........Ma), Nigerian Younger granites (213 -141 Ma), Zimbabwe (205 - 200 Ma), West African craton (200-180 Ma);...the base of the Karoo sequence in southeastern Zimbabwe and northern Lebombo (Cleverly and 6 East African |  | | Book | | Brazil: Preliminary studies. 26 The Complete Phlogopite-Tetraferriphlogopite Series in the Catalao-I...Cho (D027 and D018) Diamondiferous Kimberlite Complex Slave Craton, Northwest Territories, Canada Doyle...subcontinental lithosphere samples in an olivine-phlogopite-carbonate magma. Helmstaedt, H.H., Harrap, R...Ben Ismail, W., Lloyd, G 458 460 466 469 471 Complex Origins and Multiple Ages of Mantle Zircon Megacrysts...Multiple Inclusions In Diamonds: Evidence For Complex Petrogenesis. Taylor, W.R., Bristow, J Cyclicity |
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