 | | Journal (article/letter/editorial) | | Canberra Received April 15, 1970 Abstract. High-K ealo-alkaline rocks from Cape Nelson, eastern Papua...high-K talc-alkaline rocks and alpine ultramafic rocks. The chemical character of the lavas (high K, Rb...small flank cones. The complex is composed of high-K calc-alkaline rocks, ranging from high-A1 basalts...(1966) presented one chemical *'~"/, I-r~-,~ I k-~ ~ c G "~°' : * E ~ '" -----.-'~,~. , New...chemical data are presented, and the origin of high-K cole-alkaline rocks and their relationship to shoshonites |  | | Report (chapter) | | Bois to east of Lamprey Falls) Lac du Bois pegmatite K-1 pegmatite . Lucky NO.3 pegmatite Pine claim , Winnipeg...production . . . . . . . . . . .. .. Greer Lake feldspar quarry .......... ....... . . . . . . . . . .... . . . . .. . . . . . . .. . Pegmatite southwest of feldspar quarry: GL-1 ................ . . . . .... .. .. . . . .. . . . .. . . . . Pegm atites southwest of Greer Lake .. . . . . . . . . . . . . . .....Lac du Bois pegmatite .... 20 16. Location of K-1, Lucky No.3, and Pointe du Bois pegmatites ... |  | Kröner, A., Alexeiev, D.V., Rojas-Agramonte, Y., Hegner, E., Wong, J., Xia, X., Belousova, E., Mikolaichuk, A.V., Seltmann, R., Liu, D., Kiselev, V.V. (2013) Mesoproterozoic (Grenville-age) terranes in the Kyrgyz North Tianshan: Zircon ages and Nd–Hf isotopic constraints on the origin and evolution of basement blocks in the southern Central Asian Orogen. Gondwana Research, 23 (1) 272-295 doi:10.1016/j.gr.2012.05.004 | Journal (article/letter/editorial) | | (KT) in the west (Bakirov and Maksumova, 2001) (see Figs. 1 and 2). AC The KNTS represents an amalgamation... Tianshan proper by a major transcurrent fault (see Wang et al., 2011, 2012). This terrain consists of...Eu-anomalies (Fig. 5a) supporting feldspar fractionation and/or residual feldspar in their SC crustal protoliths...Two samples of Palaeozoic diorite (KG 13 and 15, see Table 2) are high in CaO and plot in the calcic-alkalic...CE MS is best achieved by using 206Pb/238U-ages (see Black and Jagodzinski, 2003, for explanation), whereas |  | | Report (issue) | | Geology of Precambrian Rocks Central City District Colorado GEOLOGICAL SURVEY PROFESSIONAL PAPER 474-C... Geology of Precambrian Rocks Central City District Colorado By P. K. SIMS and D. J. GABLE SHORTER CONTRIBUTIONS...1918Geology of Precambrian rocks, Central City district, Colorado, by P. K. Sims and D. J. Gable. Washington, U...1918Geology of Precambrian rocks, Central City district, Colorado. 1964. (Card2) 1. Geology, Stratigraphic...Central City district, Gilpin County, Colorado. 2. Geologic sections of the Central City district, Gilpin |  | Gustafson, L. B., Orquera, W., McWilliams, M., Castro, M., Olivares, O., Rojas, G., Maluenda, J., Mendez, M. (2001) Multiple Centers of Mineralization in the Indio Muerto District, El Salvador, Chile. Economic Geology, 96 (2) 325-350 doi:10.2113/gsecongeo.96.2.325 | Journal (article/letter/editorial) | | Centers of Mineralization in the Indio Muerto District, El Salvador, Chile LEWIS B. GUSTAFSON,† 5320...that formed copper deposits in the Indio Muerto district include both 44 Ma rhyolitic subvolcanic intrusions...intruding host andesite at the northeast end of the district. Very weak Cu but much stronger Mo mineralization...strong vertical zonation grades downward to alkali feldspar-biotite alteration with increasing molybdenite...chalcopyrite-bornite and quartz veining with K feldspar-biotite alteration, centered within a rhyolitic |  | | Report (volume) | | metamorphism of the upper Paleozoic (?) rocks on the southwest side of the Republic graben-_____-___-_------_--Structure...______________________ Short faults west of Republic district vein system.________ Faults just east of Repu...photographs..____________ Fault zone along the Republic district vein system.____________ High-angle faults of...___________------_--________________________ Republic district vein system_______________________________ Summary...town in the area, is within the Republic mining district, and is the site of important gold-silver production |  | | Journal (article/letter/editorial) | | structures of the Aziscohos 1 and Albee Formations See 3. Photographs of possible fossils of the Albee j>...of the Geological Society of America, for which I am deeply grateful. Field work in 1962 was supported...thin sections and petrographic equipment used. I am indebted to F. W. Cowan of the St. Regis Paper Company...field assistant during most of the field work. I am grateful for profitable discussions of regional geology...especially, David S. Harwood and Charles V. Guidotti. I am particularly indebted to Harwood for a stimulating |  | | Report (issue) | | square foot psi_ ____-_-_-__ pounds per square inch see.____-_-_--_ seconds sq ft__--__--__- square feet...399 p., illus., tables. [Published August 1967] 2 See note opposite page Al for explanation of reference...Washington, U.S. Govt. Printing Office, 437 p. 4 See note opposite page Al for explanation of reference...of breccia firmed in ore from the Copper Creek district, Pinal bodies. Sphalerite of stage 2, which constitutes...was derived from hydrothermal solutions hedral feldspar. The light-colored varved fillings, from depth |  | | Report (issue) | | Trip 18 : Safford District (Sanchez) and Morenci - Metcalf October, 1994 Bootprints Along the Cordillera...PAGE INTENTIONALLY BLANK MORENCI DISTRICT AND SAFFORD DISTRICT(Sanchez) FIELD TRIP October 8-9, 1994...the years. Contributors to these efforts include R K. Preece, M. R Pawlowski, RM. North, J.B. Griffin,...gratefully ackr Jwledged. MORENCI DISTRICT MINES AND SAFFORD DISTRICT (Sanchez) FIELD TRIP October 8-9...PDT THIS PAGE INTENTIONALLY BLANK MORENCI DISTRICT OVERVIEW The Morenci mining distrid, comprising |  | | Report (issue) | | Formation. This Neogene sequence crops out on the southwest slope of Inverness Ridge, where it rests nonconformably...sequence and of the middle and upper Miocene sequence (see Oil Test Wells , sheet 1). Additionally, the Chevron...probably part of the same granitic mass (Ross, 1978). K-Ar dating of hornblende in the tonalite of Bodega...granodiorite that crops out at Point Reyes contains K-feldspar phenocrysts that average 2 to 3 cm and are as...hornblende, about 30 percent quartz, 25 to 35 percent K-feldspar, and the remainder plagioclase. Chemically, it |  | | Report (issue) | | environment _________________ Base-of-slope environment _______________ Slope environment _____________________...trace fossils. Paleocurrents were generally west-southwest in water depth post ulated as circalittoral (150-600...access to stratigraphic information in their files. I am indebted to many of my colleagues in the U.S. Geological...wn /" 17 L ( 0 ————^\ ' f n) 1 NE SON K, / 16 LARUE tf~ ^W.' 15 / / '•^^^^ - s^ ...lithology of the Borden Formation changes a few miles southwest of the western extent of the Kenwood. This change |  | | Book | | detailed review of th e Minerals of California series, see I. Campbell, 1966, pp. 13-19.) For over 100 years...of the diverse character of the state’s eleven (See Map 1-1). mineral species, plus 5 species found...Cd Phosphorus Platinum Calcium Ca Potassium K Carbon Cerium Cesium C Praseodymium Pr Ce Protactinium...than one form, polymorph with A primary mineral see different forms that are due to more than one ...mineral formed later than the rock enclosing it; see pri- mary mineral, skam Tactite. A solfataric | | | Book | | detailed review of the .Minerals of California series, see I. Campbell, 1966, pp. 13-19.) For over 100 years...character of the state's eleven geomorphic provinces (See Map 1-1). From the lake-bed deposits of the Basin...Terbium Thallium Thorium Mo Nd Ne Ni N Os 0 Pd p Pt K Pr Pa Ra Rn Re Rh Rb Ru Sm Sc Se Si Ag Na Sr s...formed at the same time as the rock enclosing it; see secondary mineral. pseudomorph A mineral with an...mineral farmed, later than the rock enclosing it; see primary mineral. skam Tactite. solfataric A late |  | | Report (issue) | | papers on the gold occurrences of the Goldville District of Tallapoosa County, Alabama. Seven of the volume's...districts or occurrences including Georgia's Dahlonega district and Royal Vindicator deposit. Depositional types...margin, Zn-Pb resources of the central Kentucky district, and the geochemistry of America's first known...Thennobarometry of Synmetamorphic Gold Deposits, Goldville District, Northern Piedmont, Alabama (Harold H. Stowell...Piedmont Metallogenic Province, South Carolina (Steven K. Mittwede) ...................................... |  | | Report (issue) | | S. Geological Survey, Denver, Co lorado and Paul K. Sims Minnesota Geological Survey, Minneapo lis, Minnesota...Cordierite-bearing biotite gneiss containing potassic feldspar ........................... . General character...Cordierite-bearing biotite gneiss lacking potassic feldspar ......................... ............ . Cordierite-biotite..................................... . Potassic feldspar ................................................relation to host rock composition .... .. 4. Na2O / K 2O ratios of biotite gneisses in Central City-Nederland |  | | Report (issue) | | Cumberland Mountains of southeastern Kentucky, by K. J. Englund________ The ·Little Stone Gap Member of...of the Hinton ,Formation (Mississippian) in southwest Virginia, by R. L. Miller________ The Chattanooga..._ The Wildcat Valley Sandstone (Devonian) of southwest Virginia, by R. L. Miller, L. D. Harris, and J...and adjacent. parts of southeastern Wyoming, by E. K. Maughan____ Foraminifera from the Exogyra ponderosa...Mascot-Jefferson City zinc district, Tennessee, by J. G. Bumgarner, P. K. Houston, J. E. Ricketts, and |  | | Report (issue) | | quartz vein in actinolite-diopside granofels southwest of Dismal Lake____________________ 28 Photomicrographs:...Little North Fork of the Clearwater River in the southwest. The easternmost part o~ this area is covered...correlative to those mapped in the Coeur d'Alene district to the north. Because these formations are exposed...quartzite layers continue southward to the north slope of the canyon of the North Fork of the Clearwater...· - -::. .. - --·.-_ - ~ - 1100, on southwest slope of Papoose Mountain Thin-bedded biotite quartzite |  | | Report (volume) | | Cordilleran porphyry deposit literature up to date. I am confident in the knowledge that when the time comes...Niosi, D.W.A. Noble, S.R. Nokleberg, W.J. Illerbrun, K. Pardoe, A.J. Payne, J. Jackson, A. Johnston, S...several mining companies. From 1973 to 1986 Tom was District Geologist with the British Columbia Ministry of...C. Carter, and A. Sutherland Brown A. Jackson and K. Illerbrun P.G. Dasler, M.J. Young, G. Giroux and... St. George, and P.K. Wetherbee C.M. Rebagliati, K. Bowen, and D.J. Copeland R. Brown G.D. House and |  | | Journal (article/letter/editorial) | | SCHOLTEN, K. A. KEENMON, AND W. 0. KUPSCH ABSTRACT The Lima region which includes the southwest corner of...those containing appreciable feldspar; (2) those containing little or no feldspar. The first type commonly...mineral; quantitatively it is about as important as feldspar (andesine). Pyroxene (commonly hypersthene, but...type of hornblende gneiss, with little or no feldspar, does not exhibit any banding in the hand specimen...amphibole is readily recognizable. The little feldspar present is altered almost beyond recognition. |  | | Report (issue) | | 184. Origin of the Middlesboro Basin, Kentucky, by K. J. Englund and J. B. Roen____ _____________ _______________...after folding in the Valley and Ridge province, southwest Virginia, by L. D. Harris________ 186. Reversal...Relations of the Navajo and Carmel Formations in southwest Utah and adjoining Arizona, by J. C. Wright and...unusual composition in the Carmel Formation, southwest Utah, by L. G. Schultz and J. C. Wright_ 199....crystal for lead isotope study, by R. S. Cannon, Jr., K. L. Buck, and A. P. Pierce______ 200. Epidote and |  | | Report (issue) | | _________________ _ Atlantic Continental Shelf and Slope _______ _ 105 106 109 111 111 111 111 112 112...mineral belts in Nevada [abs.]: 1957 Pacific Southwest Mineral Industry Conf., Reno, Nev., Abstracts...Ferguson, 1958, Paleozoic rocks in north-central Nevada: Am. Assoc. Petroleum Geologists Bull., v. 42, no. 12...S. Geol. Survey Prof. Paper 400-B, p. B17-B19. 2 See "Contents of Geological Survey Research 1965, Chapters...from the La Plata mineral district northeastward to the Jamestown district at the front of the Rockies |  | | Book | | E. Houser, blue cap pink tounnaline fro1n Pala District. DEDICATION DARYL WALKER STREIFF February 11...his senior thesis at San Diego State University (see abstract below). He also worked on other projects...Don1enigoni or Eastside) reservoir project near He1net (see photo below). Daryl was also a 111e111ber and past... The sediments are exposed along a northeast-southwest, doubly-plunging anticline that was formed by...stress. The anticline has been offset on the southwest nose by a right-lateral oblique fault that is |  | | Journal (article/letter/editorial) | | shock metamorphism, quartz, and to a lesser extent feldspar and biotite grains from impactite samples exhibit...includes weakly to moderately shocked quartz and feldspar that exhibit microdeformation features, and moderately...is the outer dashed line. The inner line marks a slope change. Contour interval is 0.1 mGal. b) Residual... Black triangles are gravity and DGPS stations. See text for processing details. Contour interval is...crater and surroundings, obtained from ASTER images (see text for details). Contour interval is 2 m. Black |  | | Report (issue) | | Mountain 7.5-minute quadrangle is on the western slope of the Cascade Range of southern Washington, centered...from the Elk Mountain quadrangle is a whole-rock K-Ar determination of 36.3±2.2 Ma by Phillips and others...in a quarry about 1 km west of Big Bull. Although K-Ar ages determined for such glassy (but hydrated)...it underlies volcaniclastic strata that yielded a K-Ar age of about 36 Ma (latest Eocene; Evarts and Ashley...and smectites. Preferential weathering of the feldspar phenocrysts and amygdules gives the basalts a |  | | Report (issue) | | detailed studies of these resources including mining district and field studies; develops computerized resource... . . . . . . . . . . . . . . . . . . . . . . . Slope . . . . . . . . . . . . . . . . . . . . . . . .... . . . . . . . . . . . . . . . . . . . . . . . Slope-Weighted Area . . . . . . . . . . . . . . . . ....219 THE INFLUENCE OF GEOLOGY ON THE QUALITY OF FELDSPAR PRODUCTS . . . . . . . . . . . . . . . . . . ... . . . . . . . . . . . . . . . 222 GEOLOGY OF FELDSPAR DEPOSITS . . . . . . . . . . . . . . . . . . |
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