 | | Report (issue) | | GEO LOGY AND GOLD DEPOSITS OF THE CRIPPLE CREEK DISTRICT, COLORADO BY \V ALDEl\;IAR LINDGREN A:'\D FREDERIC... . . . . . . . First geological survey of the district .............................. _• . . . . . ..................... Geological structure of the district ............... _................... __ .. _..... _____________ . ________ . _. __________ . Phonolite . ______ .... __ ____________ . ______ . ____..... __ . ___ . _.. _____ . _________ _ Latite-phonolite. _. _. __ . .. . __ ·__ . _. ______ . ______ |  | | Journal (article/letter/editorial) | | 221 L INTRODUCTION. MOU~T KENYA, the greatest mountain in British East Africa, wa~ discovered by Ludwig...1883, when Joseph Thomson, after a view of the mountain across the Laikipia plateau, described it as the...of lava which closed the volcanic life of the mountain . . . . The crater has been gradually washed away...(hyalo-andesite), and phonolite, and thus proved t h e volcanic nature of the mountain. i Part I , ' The...through the forest-belt from Ndoro and entered a valley, which I have named the Teleki ~alley (see map |  | | Journal (article/letter/editorial) | | Asaharab and Robert J. Sternc a Department of Mining Engineering, Faculty of Engineering, University... University of Texas at Dallas, Richardson, TX, USA ABSTRACT Late Eocene – Oligocene volcanic rocks...compositions, from basalt-trachy basalt and tephri-phonolite to trachyte-latite. Whole rock chemical compositions...Abundances of rare earth elements in the tephri-phonolite group are much higher than in the trachyte-latite...Informa UK Limited, trading as Taylor & Francis Group ARTICLE HISTORY Received 7 September 2019 Accepted |  | | Journal (article/letter/editorial) | | Williams (1972) has estimated the total volume of phonolite lava in Kenya as 25,000 km3 and suggests that...that Kenya phonolites exceed the total volume of phonolite lava found elsewhere in the world by several orders...chemically distinct types; one of which he calls phonolite (sensu stricto), the other trachyphonolite. He...recognizes that the more undersaturated type (phonolite s.s.) is entirely restricted to the lower part...than 10% modal feldspathoid the name Kenya-type phonolite is c:.nsidered more appropriate and used in the |  | | Report (issue) | | square miles of the central sector of the Great Rift Valley and its eastern shoulders, an area of great diversity...major episodes of faulting which formed the Rift Valley as it is seen today. From evidence derived mainly...cover many hundreds of square miles of the Rift Valley and its shoulders, and the author's explanation...Topography 2. Drainage (1) Drainage outside the Rift Valley (2) Drainage into Lake Baringo and Lake Hannington...Phonolites (i) Ngelesha phonolite flows (ii) Ndurumo phonolite flows (üi) Uaso Narok phonolite flows .. (iv) Wasagess |  | | Journal (article/letter/editorial) | | magnifying glass, as in melaphyre, aphanite, phonolite, basalt, &c. ; (2) the mass of rock may vary in...determination of the mineral constituents of a group of rocks, the arrangement of which the following...sollble in water. a. Constituents of water. [1. Group. Ice.] b. Pure saline taste, but contaminated with...iron, sul. phate of magnesia, or glauber-salt. [2. Group. _Rock-salt.] II. Order. (Anhydrolyte.) Rocks insoluble...gives the reaction of li~e and sulphuric acid. [3. Group. Sulphate of lime. ~lnhydrite and gypsum.] B. Totally |  | LEGENDRE, C., MAURY, R. C., CAROFF, M., GUILLOU, H., COTTEN, J., CHAUVEL, C., BOLLINGER, C., HÉMOND, C., GUILLE, G., BLAIS, S., ROSSI, P., SAVANIER, D. (2005) Origin of Exceptionally Abundant Phonolites on Ua Pou Island (Marquesas, French Polynesia): Partial Melting of Basanites Followed by Crustal Contamination. Journal of Petrology, 46 (9) 1925-1962 doi:10.1093/petrology/egi043 | Journal (article/letter/editorial) | | closed-system fractional crystallization towards Group A phonolites. Three other groups of phonolites could...characterized respectively by seawater contamination (Group B), assimilation of nepheline syenite-type materials...68. E-mail: christelle.legendre@univ-nantes.fr (Group C) and extreme fractionation coupled with assimilation...assimilation of the underlying oceanic crust (Group D). The prominence of evolved lavas is a consequence of...contamination. KEY WORDS: Marquesas; French Polynesia; phonolite; partial melting; contamination INTRODUCTION |  | | Report (issue) | | Intermediate ring._____________________ Altered phonolite._________________ Undivided trachyte-phonolite_...geology of Magnet Cove igneous area, Hot Spring County, Ark. Map showing relation of igneous rocks of...000 to 2,500 feet and is composed of Missouri Mountain shale of Silurian age, Arkansas novaculite of...carbonatite, an intermediate ring of trachyte and phonolite, an outer ring of nepheline syenites, and two...The igneous rocks containing feldspar include: phonolite, various trachytes, tinguaite, various syenites |  | | Journal (issue) | | augite-haiiyne 'clot Hornblende-pyroxene Hornblende-phonolite Hornblende-trachyte Trachytes ' ' ', clot...Haiiyne-leucitite 1 1 13. 14. Olivine-basalts Rio Brava valley, R. R. R. R. Limburgite tuff, Campo Preguifa,...from S. Tiago and other islands of the Cape Verde Group. Presented to the Geological Society of London by...work (1940). ' ' — General geology The whole group of islands is of comparatively recent formation...and dune sands, Basalts Stage IV and ashes. Phonolite, intrusions of Nepheline-Syenite, Nephe- Stage |  | | Journal (article/letter/editorial) | | alumina deficiency. Combeite also shows high Fe3+. Phonolite and CWN of Lengai I and Lengai II show similarly...Natrocarbonatite; Peralkaline silicate lavas; Phonolite; Combeite wollastonite nephelinite 1. Introduction...volcano consists predominantly of nephelinite and phonolite (Donaldson et al., 1987; Dawson, 1989). Geochemically...are olivine melilitite, phonolite, nephelinite and natrocarbonatite. Phonolite and nephelinite constitute...geochemistry and mineralogy of lavas preceding (phonolite) and alternating (CWN) with the carbonatite activity |  | | Report (issue) | | such cases the upper group of three faces will be separated from the lower group. The scalenohedron, Fig................................. . 2. FELDSPAR GROUP: Orthoclase . . . . . . . . . . . . . . . . . .... . . . . . . . . . . . . . . 3. FELDSPATHOID GROUP: Leucite ..................... . Nephelite ....... 4. 2.45-2.50 2.55-;-2.65 }roughly 2.5 MICA GROUP: Muscovite .................. . Biotite ..........8. MINERALS, MAINLY SECONDARY: 1;. PYROXENID GROUP: .................... Epidote . . . . . . . . |  | | Journal (article/letter/editorial) | | was made of specimens of the so-called green phonolite from Elfdalen, which in the British Museum collection...be rightly regarded as belonging to the syenite group. I J Min. Meg. 1900, XII, 255-78. Hjelm K. Vetensk...present note it is referred to the tinguaite (phonolite) group, owing to the striking resemblance in characters...is the prevailing felspar in many specimens of phonolite from the Canary Islands) in a traehytic groundmass |  | | Report (volume) | | Mineral Resources of the Idaho Primitive Area and Vicinity, Idaho By F. W. CATER, D. M. PINCKNEY, W....BUREAU OF MINES With a section on the THUNDER MOUNTAIN DISTRICT By B. F. LEONARD, U.S. GEOLOGICAL SURVEY...the results of a mineral survey of the Idaho Primitive Area, Idaho, and some adjoining national forest lands...______________________ Salmon River district ____________________________ Chamberlain district _____________________________..._______ Edwardsburg district _____________________________ Ramey Ridge district ____________________________ |  | | Report (issue) | | CONTENTS COAL GEOLOGY Element Composition of Rocky Mountain Province Cretaceous Coals Affolter, Ronald H...Metamorphism of the Burial Metamorphosed Devonian Buchan Group Limestones, Buchan Trough, Victoria, Australia:...Imaging of Quaternary Faulting on the Crittenden County Fault Zone, New Madrid Seismic Zone, Northeastern...15 ORE DEPOSITS Mineral Resources of the Black Mountain-Miners Gulch Area, Rocky Boy's Indian Reservation...Ree-Fe-Nb-Bearing Titanite From Willow Spring Draw, Sierra County, New Mexico, U.S.A. Foord, E.E., Hlava, P.F., |  | NEGRO, A. D., CARBONIN, S., SALVIULO, G., PICCIRILLO, E. M., CUNDARI, A. (1985) Crystal Chemistry and Site Configuration of the Clinopyroxene from Leucite-bearing Rocks and Related Genetic Significance: the Sabatini Lavas, Roman Region, Italy. Journal of Petrology, 26 (4) 1027-1040 doi:10.1093/petrology/26.4.1027 | Journal (article/letter/editorial) | | leucite-bearing lavas located in the Sabatini district of the Roman Volcanic Region has been investigated...1970). The specimens derive from the Sabatini district, centred on the caldera of Lake Bracciano, about...Thus, core to rim compositions from the same phonolite (SB.l/2-> 1; SB.l/4->3) follow converging trends...clinopyroxenes from the phonolites form a distinct group at the shortest M2-O3 C 2 values (2-697-2-700A)...consistent with the configuration of the clinopyroxene group from the phonolites falling at the highest T-O^o^b^ |  | | Journal (article/letter/editorial) | | close to mean composition of nepheline syenite — phonolite, according to R. Daly (1). The zeolitic pyroxene...vicoite — an alkalic rock from the nepheline-syenite group (1). However, the mineral composition of the two...alkalic formations from the nepheline syenite —phonolite group. These nepheline rocks occur near the earlier |  | | Book (edition) | | Region Ocean and Eastern Crust 154 Hudson Valley-Lake Cham- New England 135 Con- SYSTEMS England...Deformation LATE CRETACEOUS AND EARLY TERTIARY ROCKY MOUNTAIN SYSTEMS-THE LARAMIDE OROGENY the 361 taceous...Element Heart Owl Creek and Washakie Mountains Mountain and Related Features Absaroka Range and Yellowstone...FORELAND Wichita System Belt Montana Southeastern Idaho and Western Wyoming Wasatch Area of Utah Central...COAHUILA Belt IDAHO BATHOLITH AND THE OSBURN FAULT ZONE Spatial OUACHITA, MARATHON, Mountain The Rocky |  | | Journal (article/letter/editorial) | | only exposed in some parts of the Allier river valley. Nepheline syenite xenolith samples have been collected...1 1.1 100.4 100.0 100.2 98.7 99.8 Phonolite Phonolite Basanite Hawaiite Hawaiite Total IUGS...(Table 1) and the TAS values fit with the phonolite group of the IUGS classification (Le Maitre et al...like in most xenoliths and some spots fit to the phonolite norm from the IUGS classification. These cementing...titanoniobates oxides (10–30 lm) belonging to the pyrochlore group. The outlines of the {101} pyramidal growing zones |  | | Book | | Granite-Liparite Group The Syenite-Trachyte Group 61 The The Foyaite-Phonolite Group The Diorite-Andesite...Diorite-Andesite Group The Gabbro-Basalt Group The Theralite-Basanite Group .... 68 73 76 80 88 CONTENTS ... II. The Peridotite-Limburgite Group The Pyroxenite-Augitite Group 89 The Leucite-Nepheline Rocks...Arenaceous Group: Psammites The Argillaceous Group: Pelites (2) . . . .... The Volcanic Group: Tuffs...Calcareous Group Siliceous Group: Diatom Earth : . Volcanic Dust; The Phosphatic Group .... Dune |  | | Book (edition) | | HATCH O.B.E., PH.D., M.I.C.E. Past-President Inst. Mining and Metallurgy Past-President Geol. Soc. of South...closely packed round a silicon atom, giving an Si04-group. The oxygens lie at the corners of a tetrahedron...fits snugly into fig. 1 Tetrahedron and SiCU-group. The small silicon atom is hidden between the four...surrounded. Thus an Al3+ in the centre of an octahedral group of O’s, has a positive charge of three units to...scientifically, felsic and mafic respectively. The mafic group comprises the ferro-magnesian silicates: the olivines | | | Book (edition) | | HATCH O.B.E., PH.D., M.I.C.E. Past-President Inst. Mining and Metallurgy Past-President Ceo/. Soc. of South...closely packed round a silicon atom, giving an SiO4 -group. The oxygens lie at the corners of a tetrahedron...snugly into M,K.W. FIG. I Tetrahedron and Si04-group. The small silicon ato1n is hidden between the four...surrounded. Thus an AP+ in the centre of an octahedral group of O's, has a positive charge of three umts to share...scientifically, felsic and mafic respectively. The mafic group comprises the ferro-magnesian silicates: the olivines |  | | Book (edition) | | HATCH O.B.E., PH.D., M.I.C.E. Past-President Inst. Mining and Metallurgy Past-President Geol. Soc. of South...petrographic description of each important rock-group includes, or is followed by, an account of the distribution...of things we can do little about it; but for one group of rocks that are much to the fore at the present...FELSIC MINERALS Feldspars; Feldspathoids; Silica Group Ill ACCESSORY AND SECONDARY MINERALS 97 The Normal...Contamination; Zeolites; Epidote Group; Chlorite, Serpentine Group; the Carbonates; Talc Part II: Modes |  | | Book (volume) | | confused when faced with the countless number of group, formation, and member terms used in the area, the... Gulf Coastal Plain. The Nash dome in Brazoria County, Texas, was mapped in 1924, the first prospective...this technique, the Orchard salt dome in Fort Bend County, Texas, was made in 1924. From that time on, the...unfortunately been overburdened with many hundreds of group, formation, and member names, many of them unnecessary...lithostratigraphic subdivision is all but impossible. Group, formation, or member names in these sequences have |  | Wang, Hong-Zuo, Chen, Pei-Rong, Wang, Kai-Xing, Ling, Hong-Fei, Wu, Jun-Qi, Tang, Jiang-Wei, Zhao, You-Dong (2018) Cretaceous A-type volcanic–intrusive rocks and simultaneous mafic rocks along the Gan-Hang Tectonic Belt, Southeast China: petrogenesis and implications for the transition of crust–mantle interaction. International Geology Review, 60 (11) 1684-1706 doi:10.1080/00206814.2018.1428829 | Journal (article/letter/editorial) | | of Uranium Geology, 10 Xiaoguandongli, Chaoyang District, Beijing 100029, China; State Key Laboratory Breeding...University of Technology, 418 Guanglan Road, Jingkai District, Nanchang 330013, China Supplemental data for...Informa UK Limited, trading as Taylor & Francis Group 2 H.-Z. WANG ET AL. abundant volcanic–intrusive...21 22 No. Locations Mafic rocks along the GHTB Group 1 1 Caoxikou, Pujiang 2 Shanxiacao, Jinhua 3 Fangtan...Jiangshan 7 Yanshan, Guangfeng 8 Shaxi, Yongfeng Group 2 9 Liucheng, Wuyi 10 Chentangwu, Jiangshan 11 Lousishan |  | Gon'shakova, V.I., Zaritskiy, A.I., Kirikilitsa, I.S., Levenshteyn, M.L., Strekozov, N.F., Teteryuk, P.I., Khitrov, V.G. (1975) The problem of kimberlitic magmatism in the Azov region. International Geology Review, 17 (2) 175-186 doi:10.1080/00206817509471714 | Journal (article/letter/editorial) | | the Ukraine and the RSFSR, we may recognize the group of Latonovsk posi tive magnetic anomalies, very...Nb, Zr, Ga, and Li [Pb apparently omitted; see Group I list on p. 1397]. As a result of an analysis of..."method of dendritic as sociations" and the " ip -group" analysis (Miller and Kahn, 1962), have been used...basaltoids ( augitites and limburgites) toward the group of pseudoleucite basanites, malignites, and phonolites...form of a short branch from the alkaline basaltoid group, marks the beginning of a second line of "develop |
|
