 | | 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 |  | | Book | | known in 1887 as the Yale Farm, about two miles northeast of the town of Litchfield, where a mass of white...a few such specimens have been found after 1960 (see the Amity-Edenville entry for Edenite and Spine!)...Mount Malosa, Chilwa alkaline province, Zomba district. "Illite" is the name of a series of incompletely...to 2 cm which are pseudomorphs after bastnasite--see photo in Guastoni, Pezzotta and Zorzi (2008). ILMENITE...massive calcite. or, rarely, still attached to the feldspar/mica walls of the dike (www.davidkjoyceminerals |  | | Journal (issue) | | North-West Branch: 1. Knight, F.G.A. South Yorkshire & District Branch: J. I. Platts, F.G.A. Examiners: B. W....Chatham and Kashan as well as the newest by Knischka ("K-rubies) are quite a different matter; that is to say...1983, XVIII, 6 Knischka are not only very easy to see but are also a highly characteristic internal hall-mark... J.Gemm., 1983, XVIII, 6 and then in synthetic "K-rubies (Figure 7), but are never seen in natural gemstones...formula. The analysis shows the presence of AI, Mg, K and Si, with some Fe and Ti and traces of Cr. The |  | | Journal (article/letter/editorial) | | suggestions as to what may have occurredin this district. This is thefirstreportedindication by isotopic...Blue Age (Northwest) mineralized fissuresand Northeast fissureswith minor mineralization. Succeedingunmineralizedfault...belonging to fissure systems I and II. S-5: K-feldspar from a pegmatite cutting Butte quartz monzonite...altered or weathered, or both. K-feldspar from a pegmatite on the northeast slope of Timber Butte, cut west... Nine Mile House southeast of Butte ore district. Both 600 ft. from the summit. The quartz monzonitehere |  | | Report (issue) | | region showing the Mount Diablo area on the northeast and southwest flanks of Mount sections Diablo...Mount Diablo area in the Mount Diablo area (4) district, 1875-1957 1875-1877 ABSTRACT This report...explained in various ways by previous workers, and am offering an explanation that differs in some particulars...low-grade quicksilver ore are known to Mount Diablo district, and with further exploration it might well be...the north and shrubs slopes, common in the district include less common. Because ies. The wild |  | | Report (issue) | | Schist Series. In a study of the Julian mining district, Donnelly (1934) introduced the name Julian Schist...continental margin. Much of the abundant quartz and feldspar sand was derived from late Proterozoic crust of...biotite, and K-feldspar, set in a finegrained matrix of recrystallized quartz, feldspar, and mica. In...plagioclase, subequal quartz and biotite, and K-feldspar and, as stated above, may contain hypersthene±actinolitic...the basis of modal percentages of plagioclase feldspar and ferromagnesian minerals. Sulfide minerals |  | | 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 |  | Guo, Pei, Wen, Huaguo, Li, Changzhi, Jin, Jun, Lei, Haiyan (2021) Origin and enrichment of borates in a Late Paleozoic alkaline lake-playa deposit, Junggar Basin, NW China. Ore Geology Reviews, 138. 104389pp. doi:10.1016/j.oregeorev.2021.104389 | Journal (article/letter/editorial) | | replacement of sodium carbonate minerals. In the lake slope deposits, reedmergnerite is also very abundant and...lake center and dolostone and mudstone in the lake slope-margin. 2 P. Guo et al. Ore Geology Reviews...conglomerates dominate the south western steep slope, thick-bedded evaporites dominate the center, and...barytocalcite witherite reedmergnerite searlesite albite K-feldspar Na2CO3⋅NaHCO3⋅2H2O Na2CO3⋅3NaHCO3 NaHCO3 Na2CO3⋅2CaCO3...2019). deposits (Table 1). The northeastern lake slope-margin deposits are characterized by high proportions |  | | 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 |  | | Book | | mineral species at Mont Saint-Hilaire, Quebec. I am very happy that Ole V. Petersen and Ole Johnsen accepted...Greenland fold bell \~~-:~$ '7 ~Dcvoruan-Tertia~. IM - ~ ProteltlZOIC. oed:men~ 'r:, _ ...,1 \J basm~...Prccambrian shield [.___J (2500-3900 m.:I. years) 500 k.'T1 LJ Unddfercntiated FIG. I. Simplified map of...iron on Disko (Qeqertarsuaq) by K.J .V. Steenstrup [see, for instance, his articles in Videnskab elige M...famous tourmalin e at Qa rusulik (Qaarusulik) in the Am e r a lik Fjord, an d at Ilimaussaq (Illimmaasaq) |  | | Journal (issue) | | AQUAMARINE BERYL crystal, 9.5 cm, with schorl and feldspar, from the Erongo Mountains, Namibia. Desmond Sacco...publish. Thanks to Uli’s generosity, readers get to see an unprecedented selection of specimens from this...their purchases: “Oh no”, he’d reply, “I am not a dealer, I am a collector.” Often collectors would try...shipped to them, but they also got the same reply: “I am not a dealer.” As a collector, he was the most international...September–October, 2006 collectors usually scampered over to see him as soon as a show opened. Likewise, dealers would |  | | 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 | | | 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 |  | | Journal (article/letter/editorial) | | different geology, petrography and, according to K-Ar data (Ditmar and Rublev, 1983), is older (156 Ma)...× 4.3 km), elongated and narrowing toward the northeast (Fig. 1). It is made up of volcanogenic and intrusive...the contact aureole (a—charoitite, b— aegirine-feldspar fenite, aegirinite, microclinite); 15) skarns...layered series is shown in drill cores 1 and 2 (see Fig. 2). The basal pyroxen ite, underlain by melilite-forsterite...alkalic clinopyroxenite, bio tite or kalsilite-feldspar pyroxenite (yakutite), pseudoleucite and kalsilite |  | | Journal (article/letter/editorial) | | SOUTHWESTERN MONTANA AND ADJACENT IDAHO BY ROBERT SCHOLTEN, K. A. KEENMON, AND W. 0. KUPSCH ABSTRACT The Lima region...granite complex. The Laramide orogeny began with northeast folding, probably Paleocene, which resulted in...by northwest folding and overthrusting to the northeast. The low-angle Medicine Lodge thrust, which may...peneplain and in part formed the present ranges. Northeast drainage on this surface maintained itself across...structures Laramide structures General remarks Northeast folds Northwest folds Other folds Low-angle thrusts |  | | Journal (article/letter/editorial) | | 2004). A thorough summary of the geology of this district can be found in Day et al. (2016). 1815 1816...unnamed vein on the northeast slope and the “Janis vein” on the southwestern slope (Litton, 1855). The...m) down the southwestern slope (Crane, 1912). The vein on the northeast slope strikes N50°E and dips to...destruction. A small contingent stayed behind to see to the detonation of the powder magazine, which exploded...Knob, the Cedar Hill mine was opened on the west slope of the hill in 1872; the period of production is |  | | Report (issue) | | alteration in the Upper Mississippi Valley zinc-lead district, by J. W. Hosterman, A. V. Heyl, and J. L. Jo...Aeromagnetic interpretation of the Globe-Miami copper district, Gila and Pinal Counties, Arizona, by Anna Jespersen__...thickening crust, and 4 other holes were drilled (see accompanying table). The base of the crust was penetrated...straight line segments, each of which differs in slope from the adjacent segments. These differences are...Jjd where v= temperature at depth x at time t, k=diffusivity, and erf=the tabulated error function |  | | Book | | SAE MANy l^OAO MARERSRUN daft. They Sa^ iTislo See how The warld WAS MADE 182.4 ^ v/aCTeR ScoTt B*#SHRoman's...Bowman, 1966b) Light Minerals Quartz Chert Feldspar, potash Feldspar, plagioclase Glauconite, single grains...some glauconite. Only 3 percent contained neither feldspar nor glauconite. Geographic trends in the heavy...exceptions, are not well defined. Samples along a northeast to southwest line passing from the southwestern...Township, N. J., and Swedesboro, N. J., have high feldspar and amphibole content. The heavy fractions of |  | | Journal (article/letter/editorial) | | Triassic clastic series is known as “Verrucano” (see Brandi 1964; Tongiorgi et al., 1977; Franceschelli...specimen (Baldelli et al., 1989). The detritic K-feldspar, almost always sericitized, is more abundant...3.9 Chlorite 4.1 1.6 – 7.4 3.1 1.0 – 7.3 K-feldspar 3.4 0 – 11.2 2.4 0 – 12.2 Albite 0.6 0 –...recently worked stone, even if nine centuries old (see for example, the capitals of the 11th-century San...many small quarries beneath covers the mountain slope. The macroscopic features of the quartzite here |  | | Book (edition) | | editions, and Hey's "Chemical Index of Minerals" (see below for more complete references to these works)...solution or finely dispersed extraneous colorants. (See "Colar of Minerals" by George Rapp, Jr. Hougl1ton...X-Ray Crystallography," edited by N. F. M. Henry and K. Lonsdale, Kynoch Press (Birmingham, England) three...Patterns for Silicate Minerals," by I. Y. Borg and D. K. Smith, Geological Society of America, Memoir 122...Rare Elements and Genetic Types of Their Deposits, K. A. Vlasov, Editor, Academy of Sciences of the USSR |  | | Report (volume) | | Clay (<2 µm) Cation-exchange capacity Extractable K Ch 12: p349, Table 1 entries: 1. Trap Spring oil...for …” p488, l 5, ¶ 2 should read: “… Cs+ > NH4+ ≈ K+ ≈ H+ > Ba+ > Sr2+ ≈ …” Ch 15: p527, l 27: Change... . . . . . . . . ..81 Willhendersonite: Caz(Cao5,K)2[Al6Si6024]·1 OH20 . . . . . ....................... . ...................83 Dachiardite: (Cao 5,Na,K)4[Al4Si20048}18H20 .................... . . . . ........................84 Bellbergite: Ca5(Sr,BaMNa,K)z[Al18Si18072] ·30H20 ............. . .. . .. . . |  | | Report (volume) | | ............................ Maryland and the District of Columbia................................................................. 2. Crystal Falls district, Michigan.................................. .................................... 51 7. Mesabi district, Minnesota....................................................................... 74 2. Butte district...................................................................... 83 6. Castle Mountain district......................................... 7. Highwood |  | | Report (issue) | | which have varietal names that are widely used (see page 22). These include aquamarine, red beryl, morganite...designate some of the more common beryl colors (see page 22). Common beryl is generally opaque or translucent...the presence of specific chromophoric elements (see table below). Occurrence With the exception of the...zones where crystals may reach considerable size (see box below). In fact, crystals in excess of 20 tons...evidence of dissolution, as seen in the blue beryl on feldspar from the Northern Areas, Pakistan (upper left; |  | | Journal (article/letter/editorial) | | 6462 457; E-mail: kopa@geo.vu.nl 0012-821X/98/$ – see front matter 1998 Elsevier Science B.V. All rights...performed on hornblende, plagioclase, groundmass K-feldspar and bulk crystalline groundmass separates using...Rock type Geochemical data are expressed as wt%. K=Ca values are either calculated as weighted means...hornblende sample VLI-5 (100:2 š 0:4 Ma) and K-feldspar samples VLI-6 (102:4 š 0:5 Ma) and VLI-9 (101:6...plateau, isochron and total fusion ages. However, the K-feldspars have high MSWD values indicating an increased |  | | Report (issue) | | 184. Origin of the Middlesboro Basin, Kentucky, by K. J. Englund and J. B. Roen____ _____________ _______________...crystal for lead isotope study, by R. S. Cannon, Jr., K. L. Buck, and A. P. Pierce______ 200. Epidote and...productive aquifers in the Tacoma area, Washington, by K. L. Walters-_ . ____________________________ 136...NEVADA By ARNOLD L. BKOKAW, GARLAND B. GOTT; DON K. MABEY; HOWARD MCCARTHY, and UTEANA ODA, Denver, Colo...centered over the south edge of the Robinson mining district, where disseminated copper deposits occur in an |
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