 | | Journal (article/letter/editorial) | | Karroo average • O World average • Q Kokstad dolerite x / . & Mt. Arthur tholeiite Mg ICa] TEXT-FIG...segregations are plotted, with the average Karroo dolerite (Walker and Poldervaart, 1949) and an average...compared with abnormal zoning in pyroxene from a dolerite of Mount Arthur, East Griqualand (Walker and Poldervaart...sediments. These authors remark on the paucity, in the dolerite, of pegmatitic schlieren and other evidence of...(1946) description of the conversion of olivine dolerite to tholeiite by the addition of water distilled |  | | Report (volume) | | ................................... Maryland, District of Columbia................................................................. 2. Crystal Falls district, Michigan ............................. 3. Menominee.............. Fourth. Schist from the Aragon iron mine ................. 5 64 66 70 70 71 72 72 ( 6....................... 124 5. Castle Mountain district.................................... 129 6. Highwood............................ 140 2. Pikes Peak district. ......................................... 3. |  | | Journal (article/letter/editorial) | | BLACK JACK I II SiO, 46-93 46-66 TiO, 3-04 3-21 AljO, 6-61 5-76 Fe,O 3 1-53 - 1-84 FeO 6-64 7-22 MnO... 1924. The Igneous Geology of the Burntisland District. Trans. Roy. Soc. Edin., liii, 479-501. 1931....lxxii, 353-370. KROKSTROM, T., 1937. The Hallefors Dolerite Dyke and some Problems of Basaltic Rocks. Bull...Petrochemical Studies on the Alkaline Rocks of the Moroto District, Sakhalin. Bull. Geol. Soc. Amer., lxiv, 769-810 |  | | Journal (article/letter/editorial) | | PDB. Deep diamonds from the nearby Koffiefontein mine have 613Cvalues between -2.9 and -6.1 %o.At these...with xenoliths, which are mainly Karroo shale, dolerite, granite, and gneiss. The discrepancy may be related...(1979). Approximately 0.6% of the diamonds from this mine contain inclusions. About 70% of them belong to...Karroo system which have been cut by numerous dolerite sills. At least two phases of intrusion have been...rock is similar to that described for the Finsch mine (CLEMENT, 1975); SMITH (1983b) has classified it |  | Chudy, T.C., Zeh, A., Gerdes, A., Klemd, R., Barton, J.M. (2008) Palaeoarchaean (3.3 Ga) mafic magmatism and Palaeoproterozoic (2.02 Ga) amphibolite-facies metamorphism in the Central Zone of the Limpopo Belt: New geochronological, petrological and geochemical constraints from metabasic and metapelitic rocks from the Venetia area. South African Journal of Geology, 111 (4) 387-408 doi:10.2113/gssajg.111.4.387 | Journal (article/letter/editorial) | | investigated here are frpm the areas west of the Venetia Mine in the Iieit Bricjge Terrane of the Central Zone...klippen zone, which is intruded by Froteroztjic dolerite dykes and sills (Figure lb). The structurally...rocks of the KMT on farm Icon are intruded by dolerite and overlain by Karocs age .sediments, alluvium...alteration Diops Trem Anth Figure 2. ACF-diagr.im (A=AljO^-Na2O-K2O: C=C:iO; F-FeO+MgO+MnO) with plotted composition...62,07 23,56 0,09 h,d,I, 0,03 b.d.i. 9,67 SiOi AljO, FeO MgO CaO 1869A- 55.66 27,76 57.66 26,01 |  | SABINE, P. A., BECKINSALE, R. D., EVANS, J. A., WALSH, J. N. (1982) Geochemical and Strontium-Isotope Studies of Reactions between Basic Magma, Chalk, and Flint, and the Role of Groundwater, in the Carneal Plug, Co. Antrim, Northern Ireland. Journal of Petrology, 23 (3) 427-446 doi:10.1093/petrology/23.3.427 | Journal (article/letter/editorial) | | plug, Co. Antrim, Northern Ireland, is a Tertiary dolerite intrusion, 150 m in diameter, which incorporates...chalk and flint The minerals are those of the dolerite, together with fayalitic olivine, sahlite, nepheline...basic magmas, since the three rock end-members dolerite, chalk, and flint, are readily identifiable and...presented for the end-members, chalk, flint, and dolerite show that the initial ratios in the metamorphic... P. A. SABINE ET AL. INTRODUCTION A Tertiary dolerite plug intruding Tertiary basaltic lavas at Carneal |  | | Journal (article/letter/editorial) | | INTRODUCTION The Keweenawan lavas of the Lake Superior district form the inner border of the Lake Superior syncline...somewhere in the central portion of the syncline. The district is, thus, one of the world’s large plateau-type...LAVAS 511 define the type as follows: “The term dolerite is used to designate portions, in the lavas of...and dolerite mixed Pinkish dolerite Ophite and dolerite mixed Pinkish dolerite Ophite and dolerite mixed...mixed Ophite Ophite (6 feet of dolerite at top) Ophite Ophite Ophite Ophite Downloaded from gsabulletin |  | | Journal (article/letter/editorial) | | 1976), and have become known as the MD (meta-dolerite) dykes although they remain as fresh undeformed...50-98 030 113 5618 — 1 43 089 8-01 SiO 2 TiO 2 AljO 3 CrjO 3 FeO MnO MgO CaO Na 2 O 14C 6M 78-3 4-4...149206) are composed of coarse and fine-grained dolerite respectively. The textures are predominantly sub-ophitic...flows. Am. Miner. 64, 856-64. Baldridge, W. S., Beatty, D. J , Hill, S. M. R., & Albee, A. L., 1979. The...Jensen, S. B., 1962. Some dolerite dykes in the southern part of the Godthab district. Meddr. Grenland 169 |  | | Report (volume) | | ............................ Maryland and the District of Columbia................................................................. 2. Crystal Falls district, Michigan.................................. ....................... Schist from the Aragon iron mine............................... ill 17 .18 18 19................................... 51 7. Mesabi district, Minnesota....................................................................... 74 2. Butte district.............................................. |  | | Journal (article/letter/editorial) | | the Isortoq Complex of central West Greenland, dolerite dykes have been metamorphosed in upper amphibolite...granulite facies (Buddington, 19656). Metamorphosed dolerite dykes of the Nagssugtoqidian mobile belt of West...of plagioclase vs. Flo. 10. Comparison Compa mt AljO 3 . (b) Weight per cent A12O3 vs. weight per cent...metamorphism in the Willyama Complex, Broken Hill district, New South Wales. J. Geol. Soc. Australia, 11...basic rocks from the Willyama Complex, Broken Hill district, New South Wales. Part I. Hornblende. Miner. Mag |  | COULON, C., VIDAL, P., DUPUY, C., BAUDIN, P., POPOFF, M., MALUSKI, H., HERMITTE, D. (1996) The Mesozoic to Early Cenozoic Magmatism of the Benue Trough (Nigeria); Geochemical Evidence for the Involvement of the St Helena Plume. Journal of Petrology, 37 (6) 1341-1358 doi:10.1093/petrology/37.6.1341 | Journal (article/letter/editorial) | | OF BENUE TROUGH Albian shales (e.g. the Uturu dolerite). In the Anambra and Afikpo basins, numerous doleritic...according and Bima Hills areas). In the Burashika district to stratigraphy (Ojoh, 1988). This 147-106 Ma... 269 2-99 2-68 1-53 1-44 3-21 1-48 2-24 AljO, 16-22 17-21 15-80 14-59 14-64 14-58 20-26...basalt (Uturu); 86 B1: dolerite (Afikpo); 105 B4: dolerite (Oturkpo); 113 B: dolerite (Makurdi). ially in |  | | Book | | mounds. Unconfomiity Tertiary Intrusive rocks Dolerite: thin dykes intruding Monian rocks (Gwna Melange...or Porth Meudwy Forn1ation Wig Bach Formation Dolerite: mostly sill-like in form, although locally discordant;...textures. Interpreted as probably Llanvim in age. Dolerite dykes intruding Monian basement probably of same...glacial deposits occ11r. The western part of the district is dominated by various rocks of late Precambrian...transgressive dolerite sills, peperites and pillow lavas, and Tertiary olivine dolerite dykes. © NERC |  | | Journal (article/letter/editorial) | | mixed character of the Lisbon-Sintra province: — AljO 3 + CaO + total alkalis A12O3 + CaO - total alkalis...in a few of the intrusion centres, while small dolerite dyke swarms both pre-date the complexes and recur |  | | Journal (article/letter/editorial) | | Tin Mine are located less than half a kilometre north of the Argemela Hill (Fig. la). This mine worked...Central Portugal, ~ 1 5 km east of the Panasqueira mine, one of the world's largest wolframite producers...out and possibly extends beneath the Argemela district. The thermal aureole of the composite and zoned...zone of spotted schists in the Argemela Tin Mine; 6, dolerite dyke; 7, aplite dyke (argillized); 8, underground...underground works of the Argemela Tin Mine; 9, sample location; 10, drill-core, (b) Interpretative crosssection |  | | Book (volume) | | its name from the locality Bytown (now Ottawa), Canada. Anorthite is compounded from the Greek negative...Taylor (1955). MacKenzie (1954). Blue Mountain, Ontario. 90°17' Ferguson et al. (1958); Amelia, Virginia;...(“cryptoperthite”), nordmarkite, Spalen, Nordmark, Oslo district, Norway (Oftedahl, 1948). Anal. Lars Lund. 3....pyroxene granulite of the charnockite senes, Salem district Madras (Howie, 1955). Anal. R. A. Howie. 16. Colourless...M““^Perthite- nepheline-syenite, Fukushin-zan district, Korea (Yoshizawa, 1933). Anal. H. 3. Microcline |  | | Journal (article/letter/editorial) | | + cpx + hbl + gar) occur. A set of undeformed dolerite and picrite dykes showing ophitic textures and...Coonoor-Kunda road Manjeri Emerald estate Nedugula bauxite mine Kotagiri Kotagiri Kotagiri Mettupalayam Naduvattam...9-21 1-82 Total 100-27 99-43 99-43 SiOj TiO2 AljO 3 CrjO3 FeO MnO MgO Si Ti Al Cr Fe 2 + Fe 3 + Mn...Mafic granulites 12711 291 51-67 001 2-91 Meta dolerite K326 49-95 003 1-33 002 32-56 077 14-43 051 ...Course Handbook, Vol. 2. Vancouver Miner. Assoc. Canada, 84-97. Frost, B. R., & Frost, C. D_, 1987. C O |  | | Journal (article/letter/editorial) | | rising in solution. By analogy with the Karroo dolerite, Walker suggested that some upward migration of...0132 0128 Total Sp. Gr. 0-44 _ Molar ratios K.O/AljO, TiOt/AI.O, — — — — — 100-64 [For key to Table...acknowledges tenure of a National Research Council of Canada Post-Doctoral Fellowship. Professor W. S. McKenzie |  | | Book (edition) | | Alkaline Rocks Gabbro, Anorthosite, and Peridotite Dolerite and Lamprophyre Rhyolite and Dacite Trachyte and...examples of sills in this country are the quartz-dolerite and teschcr>ite intrusions of North The largest...1500 square miles. Britain. dolerite), The source of the quartz-dolerite sills is the series of great...Africa where, according to Dr. A. L. du Toit, dolerite intrusions, mostly of sill character, penetrate...famous “ nickeltheir bases. eruptive ” of Sudbury, Ontario, which a basin shape, is The Insizwa gabbro of |  | | Book | | History of Lake Superior mining The Keweenaw copper district of Michigan 33 35 35 Copper mining on Isle...and elsewhere Marquette iron district Menominee 38 39 iron district Crystal Falls, Florence, and...Gogebic iron district Vermilion iron district Mesabi iron district Accounts of the district before Opening...40 41 its opening 41 42 44 iron district Baraboo iron district Less important developments 45 ....73 Michigan Northern Wisconsin Minnesota 77 Ontario 81 Lake Superior region (general) Chapter IV |  | | Journal (article/letter/editorial) | | 53.7 54.1 54.3 54.4 54.4 54.4 54.5 54.6 Aljo, 14.1 14.2 13.9 14.5 14.1 14.4 15.0 13.9...the Yakima-type basalt in the Centralia-Chehalis district in the southern part of the Puget lowland (Snavely...some major dolerite intrusives near the margins of the continents, such as the Ferrar Dolerite in the Antarctic...(Gunn, 1962), the Tasmanian Dolerite (McDougall, 1962), the Guiana Dolerite (Hawkes, 1966), and to the...WASHINGTON 421 tholeiitic flood basalt sequences or dolerite sill related to plate tectonics. Gilluly (1971) |  | | Book | | . . . . . . . . . . . . . . . . . . . . . . . Canada . . . . . . . . . . . . . . . . . . . . . . . ...for radioactive nunerals in different parts of Ontario and came about as a result of placing 1nineral...Elclorado deposit, Great Bear Lake, Canada; Gold.fields district, Canada) (Fig. '2.7). Brecciated pitchblende...pitchblende, Port Radium, Great Bear Lake, N.W.T., Canada. Cracks and borders of spherulites contain covellite;...and quartz (black) which also replaces core. Bigay mine, Lachaux, Auvergne, France ( X 100) ( Geffroy and |  | | Book | | ficial geology. The oldest rocks proved i11 the district are marine sedirt1ents of Cambri,1n ancl Ordc>vician...Knowle Basin. Followi11g uplift and er·osion of the district in Ordovician time, the earliest Siluria11 sandstones...erosion. D11ring C�arbonit· e rot1s times the district lay at the southern 1nargi11 of tl1e Pe11nine...Etruria Formation, a prime so11rce of brick clay. Dolerite bodies, including the Rowley Regis lopolith,...periglacial deposits cover a large part of the district; organic-rich Hoxnian interglacial deposits have |  | | Book (volume) | | Forsterite, crystalline limestone, Mogok Mining District, Burma (Adams and Graham, 1926). Olivine, with...Olivine, forsterite—mica—magnetite rock, Vostochyni mine, Ensky, U.S.S.R. (Sobolev, 1947). Olivine, tuff...from a variety of different rocks including the dolerite and gabbro sills and laccoliths of Ortho- and...minerals from the Ruby mining district of Mogok, Upper Burma. Trans. Roy. Soc. Canada, 3rd ser., vol. 20, sect...Studies on Karroo dolerite, II. Some younger intrusions of olivine basaltic dolerite. Trans. Geol. Soc |  | | Report (volume) | | risinensis, n. sp. in the Lower Gondwanas of Vihi District, Kashmir. By D. N. Wadia, Assistant Superintendent...Miscellaneous Note Lollingite : from the Hazaribagh District (A. L. Coulson) . 325 G. de P. Cotter, Se.D...Orbitolinao Inst.M.M., , of th(‘ Trichi nopoly District, By By from Tibet. . and the Hocks C. A...the Joya Mair Dome Fold, near Chakwal, Jhehim District, Punjab. By D. N. Wadia, M. A., B.Sc, Bombay)...are seen and their outcrop follows round to the mine seen in the foreground. The beds under the coal |  | | Report (volume) | | ......................... 82 Maryland and the District of Columbia.............................. 83 1......................... 4. The Castle Mountain district...........................'...-.. 5. The Highwood.............................. 2. The Pikes Peak district ...... ....:..........-.....--.-----.-3. Silver................................ 6. The Ten Mile district......................................... 7. The......__,_. 264 Michigan, Wisconsin, Minnesota, Canada............................. 265 Montana...... |
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