 | | Journal (article/letter/editorial) | | 1940, were detected among the specimens from the Shawa Hills, my friend, Mr. H. B. Maufe, having identified...rather than amphibole as their coloured constituent. Shawa.—This is situated between the Muwerari and Marobi...ring. Most of the way round, the outer ring of the Shawa Hills consists chiefly of syenite, interrupted and...details regarding the petrography of this remarkable complex, which it is hoped to do at a later date. It will...Hills is considerably smaller and less complex than that of Shawa. The eastern edge is not much more than |  | | Journal (article/letter/editorial) | | einschlieBlich Sfidafrikas, Swaziland, Mogambique und Zimbabwe. Es wird die Geschichte von frfiheren Arbeiten...including South Africa, Swaziland, Mozambique and Zimbabwe. A history of previous work done on Karoo volcanism...previously recognised, the flood basalt pile being more complex than was originally thought. Rocks from the central...l'Afrique du Sud, le Swaziland, le Mozambique et le Zimbabwe. Un historique des travaux ant6rieurs effectu6s...Lebombo Monocline Karoo Volcanic Rocks of South-East Zimbabwe Karoo Volcanic Rocks in Namibia Geochronology |  | | Book (edition) | | detailed geological survey of the Alné Island complex and announced his results in a series of papers...localities as inclusions in the limestone”’ (italics mine). Actually, the first published description of...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...carbonatite dikes cutting the kimberlite of the Premier mine (p. 542) he classed as magmatic, but 1 Bowen admitted |  | | Book | | beneficiation. This processing is carried out at the mine where the rock is crushed, dried and passed through...Kalsilite, recalculated from an analysis of a complex phenocryst of kalsilite and nepheline lava of Baruta...crystallises in the hexagonal system and has a complex formula that represents essentially a hydrated...the high-temperature Or-Ab series are called anorthoclase (triclinic). At lower temperatures and under...be expressed as follows: Na-rich nepheline + anorthoclase—— > Na,K nepheline + albite + microcline (volcanic |  | | Journal (article/letter/editorial) | | syenites from the two major types of alkaline complex. The 85 km 2 mass of nepheline syenite forming...been divided on the nepheline syenites from one complex (e.g. Rangwa, Section 4). The Monchique and E....whilst achieving as thorough a treatment of each complex as possible. Nine alkaline complexes have been...Alkaline Complexes Investigated The Monchique Complex, Portugal."is the type-locality for two important...be regarded as a complete representation of the complex. Like the suite from Rangwa, it was in[ended primarily |  | | Report (chapter) | | Average K-Ar age of 320 + 8 Ma. (7) East Fife Sill Complex. AverageK-Ar age of 310 + 12 Ma. (8) Passage Group...K-Ar age of 304 ___6Ma. (10) Midland Valley Sill Complex, Scotland. Average K-Ar age of 303 + 5 Ma. (11)...plateau age of 237 _ 7 Ma. (31) Monzoni intrusive complex, Italy. Average K-Ar age of 231 + 8 Ma. (32) Sugars...190 + 5 Ma (whole rock). (41) Freetown Igneous Complex, Sierra Leone. Rb-Sr isochron age of 193 + 3 Ma...It is the youngest pluton in the Tolmie Igneous Complex and occurs some 40 km north-east of the Cerberean |  | | Book | | (0. K.), 1. KORNPROBST (France), 1. D. KRAMERS (Zimbabwe), M. J. LE BAS (0. K.), F. E. LLOYD (0. K.), R......................... 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...lavas are coeval with carbonatites in eastern Zimbabwe, both yielding age determinations of ca. 205 - |  | | Journal (article/letter/editorial) | | mineralization may either be the product of a complex polyphase mineralizing process, reflecting a combination...hanging wall. During a subsequent mining period, the mine was re-opened to recover sideritic parts of the...you look for a mine look near a mine”. This includes the imperative “if you look for a mine look for smelting...also for the chrome diopside found at Outukumpu mine, a mineral that is first and foremost recognized...Chromium deposits of this type in South Africa and Zimbabwe contribute to more than 90% to the world supply | | | Journal (article/letter/editorial) | | mineralization may either be the product of a complex polyphase mineralizing process, reflecting a combination...hanging wall. During a subsequent mining period, the mine was re-opened to recover sideritic parts of the...you look for a mine look near a mine”. This includes the imperative “if you look for a mine look for smelting...also for the chrome diopside found at Outukumpu mine, a mineral that is first and foremost recognized...Chromium deposits of this type in South Africa and Zimbabwe contribute to more than 90% to the world supply |  | | Book | | and the first flows of Wanapum Basalt (Fig. 2). Complex field relations in the Blue Mountains uplift, previously...systems for individual flows may be relatively complex, as is the 170 km long Roza system which includes...Criss, 1985). The Blue Mountains Province is a complex of ocean-derived rock suites dominated by island...radiometric geochronology; 3. The province has had a complex geological evolution, with two and possibly three...basalt flows in the younger formations. This yields complex P. MOHR AND B. ZANETI1N 66 petrographic and |  | | Book | | ............... . Pegmatites with Radioactive Complex Oxide Minerals ......... . . . .. . . ... . . Peg1natites...(Table 1.7) and occurs 111ainly in oxides, numerous complex (multiple) oxides, anhydrous phosphates, anhydrous...possibly as organic complexes. Although 1nany complex oxide minerals contain Nb, Ta, and Ti, U4 is not... green-Dy; red-Sm and Tb). Color The oxides, complex oxides, and silicates of U 4 and Th are usually...Thoriun1 minerals Simple oxides Complex oxides Simple silicates Complex silicates Simple phosphates Superge11e |  | | Book | | diamond. 61 Cr-poor Megacrysts from the Frank Smith Mine and the source regions of transitional kimberlites...Cho (D027 and D018) Diamondiferous Kimberlite Complex Slave Craton, Northwest Territories, Canada Doyle...C.J. The Kimberlite-Megacryst link at Monastery Mine. 314 Hauri, E.H., Pearson, D.G., Bulanova, G.P...kyanite-bearing eclogites from the Roberts Victor Mine, South Africa. Jacob, D.E., Kjarsgaard, B., Horn...Ben Ismail, W., Lloyd, G 458 460 466 469 471 Complex Origins and Multiple Ages of Mantle Zircon Megacrysts |  | | Report (volume) | | trend analysis in the evaluation of the Whalesback mine, Newfoundland" [ 1968], in Ore reserve estimation...trend analysis in the evaluation of the Whalesback mine, Newfoundland, in Ore reserve estimation and grade...the stratigraphy and structure of the Goldfield district, Esmeralda and Nye Counties, Nevada [abs.]: Geol...1968. 05411 Anderson, Gerald J. The Marquette district, Michigan, in Ore deposits of the United States...chronology in the Nigerdlikasik area, Frederikshaab district, in Report of activities, I 967: Gronlands Geol |  | | Book | | Schists. Their initial attempt to interpret the complex structures of the Morar anticline was followed...and structure of the Moine Schists in the Morar district, western Inverness-shire. Abstract. Proc. geol...anticline and the structure of the Moine nappe complex. Abstract. Proc. geol. Soc. Lond., 1503, iii. A...intended as a venue for the consideration of the complex relationships that exist between irruptive activity...50 years has shown that the mountainland is a complex ‘schist belt’ of folded sediments and volcanics |  | | Report (volume) | | lithospheric mantle is old and will have had as complex a metamorphic and magmatic history as the overlying...transported to the magma chamber roof zones as complex ions in a volatile phase. Carbonatites provide...Potassium-argon geochronology of the Poohbah Lake alkaline complex, northwestern Ontario. Can. J. Earth Sci. 13, 1456-9...lithospheric mantle is old and will have had as complex a metamorphic and magmatic history as the overlying...transported to the magma chamber roof zones as complex ions in a volatile phase. Carbonatites provide |  | | Report (issue) | | Brahmins of Maharajapuram in the T hanjavur (Tanjore) district of Tamil Nadu,Dr. Krishnan was born more than...being the investigations of bauxite in Kalahandi district and iron ore in the erstwhile Gangpur State. His...from geological investigations in the Singhbhum district. Between 1931 and 1934, he served as the Curator...Department. The discovery of a new coalfield in Bankura district, proving of lignite in Kutch by drilling, discovery...the first to recognise the vast potential of the mine and extended supportfor the scheme of expansion |  | | Report (volume) | | Bonne Terre area of the southeast Missouri mining district, in Mining geophysics- V. I, Case histories: Tulsa...Kam, William. 03120 13539 Ary, Max D. [New ldria mine] Pt. 1 in Mercury, jadeite, and asbestos regions...Larry L. The manganese-bearing minerals of Champion Mine, Champion, Michigan [abs.], in Inst. Lake Superior...J. Schroeckingerite from Ambrosia Lake uranium district: Mineralogist, v. 51, nos. 5-6, p. 929-930, 1966...a method of assaying wolframite at Story's Creek Mine, Tasmania [discussion of paper by M. Solomon and |  | | Report (issue) | | zircons and monazites from a mafic to ultramafic complex and its country rocks (Sauviat-Sur-Vige, French...intrusions and inclusions of the Ascutney Mountain complex, Vermont, by K. A. Foland and R. P. Lesser, Jr...and U-Pb mineral dates, northern coast plutonic complex, British Columbia, by T. Mark Harrison, Richard...and Sr and 0 isotope relations at the ABU KHRUQ complex, by T. M. Lutz, K. A. Foland, Henry Faul, Irving...the eastern part of the South Rogaland igneous complex, southern Norway, by P. Pasteels, 324 D. Demaiffe |  | | Report (volume) | | iron-formations (a grossly simplified view of a very complex problem, see Maynard, 1983). By about 2000 Ma ago...sites of continental growth tend to be far less complex than in collisional orogenic belts where magma...units of widely different ages have suffered a complex metamorphic history. In Precambrian shield areas...separated minerals from both rock units exhibit complex age patterns resulting from late Archaean (c.2900...in a previous CADS, as for example in parts of Zimbabwe (Wilson et al. 1978). The geological nature of |  | | Book (edition) | | Alaska 1 S edimentary rocks form through a complex set of processes that begins with weathering,...A multiple-orifice black smoker, Faulty Towers complex, Mothra hydrothermal vent field, Endeavour Segment...however, that soil layers are commonly much more complex than indicated by this simple scheme. As many as...are differentiated on the basis of a variety of complex criteria, such as the amount of contained organic...fundamental laws of fluid dynamics are moderately complex when ap plied to fluid flow alone. These complexities |  | | Book (edition) | | gradually from one or a few simple organisms to more complex organisms. ; Composition of the Ancient Ocean...SEDIMENTARY CYCLE The sedimentary cycle is extremely complex and is an imperfect cycle in the sense that not...flow. The fundamental laws of fluid dynamics are complex when applied to fluid flow alone. These complexities...stress is also a function of velocity of flow, a complex mathematical relationship not shown here. It tends...established by experimental work. However, it is more complex and difficult to understand than the Hjulstr6m |
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