| | Catalog/List | Sha rp lustrous size scattered on mat rix with Quartz and small s harp Albite crystal s. Specimen 8 :...8elgium. Ri ch golden- yellow bladed masses in mi lky quartz. 2-tx1-tx1 ", L3 . 2Sp 8. NATIVE ARS ENIC. 'Kusa...masses richly s c at tered over both si des of quartz veinstuff. 4x3i",t14.00 . 16. CALCITE. Castro Virreyna...growth patterns , implanted on small s l end~ r quartz c r ystals with a little crystalli s ed Sphalerite...cav i ty in brecciated chloritised s lotp. a nd quartz veins tuff . 4x2ix2 ", Ā£1 4.00 NCHEDRITE . "TnkEn | | | Journal (article/letter/editorial) | facing scarp or ā inface ā of this cuesta is a prom inent topoĀ graphical feature of western New York, paralleling...interpolated between its members, beds of pure quartz sand, of which th a t know n as the Sylvania sandstone...and of gastropods. In places it is alm ost pure quartz, w ithout adm ixture of foreign substances, and...a great portion of the Peninsula, is very prom inent on the island of Mackinac, where the concretionary...are firmly imbedded in a m atrix of inĀ durated quartz sand which surrounds them and fills in all the | | | Journal (article/letter/editorial) | .......................................... 189 Quartz-monzonite.................................................................................. 198 Quartz-hornblende-porphyrite............................perpendicular to) those of m ost of the other prom inent ranges of California. W hat genetic relaĀ tion exists...parallel to the length of the chain. The most prom inent of these streams is the San Gabriel river, which...gneissose granite, talcose slates traversed by quartz veins, and trappean rock as occurring in the Cajon | | | Journal (article/letter/editorial) | .......................................... 383 Quartz-syenite p orp h yry........................................................................ 386 Quartz porphyry................................................................................... 391 Quartz-syenite porphyry.................................ediate surrounding country, occupies a more prom inent position than its height would otherĀ wise warrant...show a very even stratification. The most prom inent ridge is the one fronting on the Ottawa river, the | | | Journal (article/letter/editorial) | some knowledge of the origin of this rather prom inent series of m etamorphics as they appear within Canadian...followed by sandy schists, including small lenses of quartz, with an appreciable am ount of pyrite. No limestones...attracted the attention of some of the more prom inent miners of asbestos in the United States and Canada...small am ount. W hile cross-fiber is the more prom inent of the two sorts, shearing, which seems to be a...surprised th at the cleavage partings are not more prom inent in the thin-section. In sections normal to the vertical | | | Journal (article/letter/editorial) | older. In a general way the gabbro is more prom inent in th e western portion of the m ountains, being...material. The Quana granite, so nam ed from a prom inent chief, near whose lodge it is well exposed, is eruptive...alike. ROCKS OF T H E REGION 135 There are also quartz veins in the granite and porphyry and in the gabbro...Fine-grained greenstones of various types. May be later. Quartz veins............. Cut by dikes Quana granite....granite, (b) porphyry, (c) gabbro. There are also quartz veins and greenstone dikes. There has as yet been | | | Report (chapter) | (Flores et al. 2006). Conglomerates with abundant quartz and fragments of schists and quartzite indicate...(Iturralde-Vinent 2004) and Miocene (Escalante 1990) quartz sands are present in Costa Rica and the ?Albian...as the SerranıĢa de Baudo. Westward-coarsening quartz sands in Late Cretaceous turbidites of the inboard...Tithonian trondhjemite and rhyolite and coarse-grained, quartz-rich granite (Fink 1970; Bouysse et al. 1983; Westercamp...metasedimentary xenoliths occur in basalts and rounded quartz grains in andesites (Nicholls et al. 1971). Silicic | | | Report (chapter) | 8, Juan Griego (VNZ): continental crystalline (quartz, feldspar, rich schist and ortho or paragneisses)...4, 63ā 88. G ARCIĢA -C ASCO , A., I TURRALDE -V INENT , M. A. ET AL . 2006b. Birth and demise of subduction...Geophysical Research Abstracts, 8, 09844. I TURRALDE -V INENT , M. 1989. Role of ophiolites in the geological...of Cuba. Geotectonics, 4, 63ā74. I TURRALDE -V INENT , M. 1994. Cuban geology: a new plate tectonic synthesis...of Petroleum Geology, 17, 38ā70. I TURRALDE -V INENT , M. 2000. Sinopsis de la constitucioĢn geoloĢgica | | | Journal (issue) | Heidelberg, W. Germany Eric Offermann Arlesheim, Switzerland Harold and Erica Van Pelt Los Angeles, CA Julius...Thick sheet with small crystals on large surface of Quartz crystals. 40 x 72 [sixteenths of an inch for a...Massachusetts Hill quartz mine, Grass Valley, Nevada Co. (6) Mamaluke Hill quartz mine, nr. Georgetown...(1) Amador mine, Amador Co. (3) Oaks and Reese quartz mine, Mariposa Co. (4) U.S. Grant mine, Calaveras... (1) Jackass Gulch, Calaveras Co. (1) Williams quartz mine, M ariposa Co. (2) Cedarburg mine, El Dorado | | | Journal (issue) | Heidelberg, W. Germany Eric Offermann Arlesheim, Switzerland Jeffrey A. Scovil Phoenix, AZ Harold and Erica...thin, concentric shells of finely crystallized quartz and sanidine feldspar, with intervening voids....Cavities may also be lined with drusy lavender-colored quartz. Topaz is locally abundant in the lithophysal and...varying degrees. Sandy inclusions of microcrystalline quartz produce a range of qualities, from otherwise gemmy...(Foord et al., 1995). Associated minerals include quartz, hematite, bixbyite (uncommonly in oriented āchainsā) | | | Journal (article/letter/editorial) | or 6 feet of sand gravel, at which point loose quartz and ameĀ thysts were found. On the first day at...number of very nice and large specimens on white quartz matrix. However, again, probably 98% of the specimens...York, the State of Maine Museum, and a few promĀ inent mineral collectors. The site was worked by Plumbago | | | Journal (article/letter/editorial) | rocks under conĀ sideration are composed largely of quartz, feldspar and mica, with accesĀ sory plagioclase...origiĀ nally limestone, soapstone, pyroxenite, vein-quartz, hornblĀ«ndic and biotitic gneisses. Both with the...apparently composed chiefly of m inute grains of quartz. Then comes (3) a very small, fine-grained, darkcolored...fine, allotriomorphic quartz, while the third belt is a fine-grained-mixture of quartz and biotite, with...there are abundant inclusions of soapĀ stone, vein-quartz, biotitic and hornblendic gneiss. All of these | | | Journal (article/letter/editorial) | limestone, gypsum, etcetera, are more or less prom inent in many localities. While the complex in question...ount of sand and gravel. Cross-bedding is prom inent and the stratum is thoroughly characteristic of...and shales of the Cutler formation are very prom inent beneath the Triassic conglomerate on the north side...comparatively resistant to weathering and form prom inent ledge outcrops on all steep slopes. The grit beds...porphyry, and maDy of red, pink, smoky, or white quartz, part of which m ay come from veins. The pebbles | | | Journal (article/letter/editorial) | is still abundant on the east side of th e Cont inent, but scarce in Cape Colony. The belief that Elephas...contained not only broken flints, hut pebbles of flint, quartz, and quartzite. This re-constructed chalk had assumed | | | Journal (article/letter/editorial) | found in the mine dump. linized pegmatite contains quartz and Morefield mine. ā This site is located white...garnet, and being worked for mica. quartz. Masses of glassy quartz are presĀ An admission fee of $1.00...microlite, monazite, muscovite, phenacite, pyrite, quartz, spessartite, topaz, tourmaĀ line, and zircon....the week, is charged to look for clear to smoky quartz, black tourmaĀ line crystals, tiny golden and aquamarine...pits cut into a pegmatite body that has a large quartz core and a thin feldspathic wall zone. Ligon Number | | | Journal (article/letter/editorial) | age. The rocks were folded, and the batholith of quartz monzonite rose high into the crust. The thickness...rhyolites locally broke through and overlie the quartz monzonite. Big Butte, at the city of Butte, is...recognizable. The main rock is a fairly constant quartz monzonite, but there is conĀ siderable diorite...Younger even than the aplitic granite are some quartz masses (PI. 112, A ). S T R U C T U R E S I N A...fracturesā often followed by aplites, pegm atites, or quartz F ig u r e 3 . ā D etail o f str u c tu re in | | | Journal (article/letter/editorial) | series: S ilu rian : Peach-bottom slates, Cardiff quartz conglomerate. Wissahickon mica-schist, including...schists; the arenaceous sediments into quartzite and quartz-schists; the calcareous m aterial into marble....medium grained, thoroughly crystalline aggregate of quartz, feldspar, and biotite, and is characterized by...alternation of layers of biotite with quartz layers or quartz-feldspar layers is due the finely gneissic...staurolite or augite. H ornblende is sometimes as prom inent a constituent as biotite, and, like it, arranged | | | Journal (article/letter/editorial) | serpentine, syenite, chert, quartz, and shale. Among these the most prom inent place is assumed by large...change in tem perature and flow are therefore prom inent factors in causing the deposition of the cement | | | Journal (article/letter/editorial) | were collected, all being typical granite with quartz, perthitic orthoclase, microline, a little biotite...of them are also of granitic composition, with quartz and sodic plagioclase (oligoclase) common, and...to andesine, quartz and orthoclase. Other rocks observed include quartz-mica-schist, quartz-feldspargranulite...quartz-feldspargranulite, and epidote-quartz rock. 3. ALLUVIAL DEPOSITS The relatively flat wadi floor is underlain by...dip (incl in~d) & -+- (veticot), G qrcnite dorn inent orecs Fig. 4. Geological map of the Wadi Beihan | | | Journal (article/letter/editorial) | theEe l,Jeing serpentine, m!lde with Mr. John C. quartz, and Fchistose Goodridge, Jr., President granite...de of brick arch, and being The monuĀ Panissero. Inent is 65 feet in height, a m 0 n 0 l i t h is much...time would be allowed to elapse before Germany, Switzerland, and Italy would see the necessity of connecting...Austrian and Hungarian bl'eadstuffs to compete in Switzerland and Eastern France with corn coming from Russia | | | Journal (article/letter/editorial) | either a quartz monzonite or a quartz diorite. In general appearance it is quite granitic. Quartz is ab...the most part and very rich in quartz. The abu ndant bipyram idal quartz phenocrysts with the alm ost felsitic...whole the granite becomes finer grained, while the quartz becomes a more conspicuous constituent. The variations...porphyry, with blebs and phenocrysts of quartz, both abundant and prom inent. The rock of the dikes and apophyses...black layers alternating with irregular bands of quartz and feldspar.* This im pregnation appears to have | | | Journal (article/letter/editorial) | granular aggregates, consisting essentially of quartz, feldspar and black mica, with considerable amounts...cal deformation. The occurrence of the two prom inent accessory min(305) 306 C. K. K E Y E S ā E PID...epidote comes in contact with unaltered feldspar, quartz and biotite grains and gives outlines to them....occurrence in such rocks as unaltered porphyrite, quartz-porphyry, dacite, andesite, and rhyolite masses...found giving shape to the unalĀ tered feldspars, quartz and mica. S um m ary. In summing up the facts | | | Report (issue) | quadrangle, is restricted predominantly to gneiss of quartz dioritic to granodioritic composition and includes...boundaries of the unit are drawn roughly along a prom, inent east-west magnetic anomaly (see Behrendt and Wotorson...Wotorson, in press a); within the unit quartz-mica schist, locally garnetiferous, appears to be predominant;...textures. Amphibolites that contain minor garnet and quartz may be impure pyrociastic deposits. Iron-formation...actinolite schist, or hornblende-plagioclase-p,arnet-quartz rock. The unit forms the slopes of most of the | | | Journal (article/letter/editorial) | .............................................. Quartz veins............................................mass and a typĀ ical argillaceous slate with prom inent cleavage. Irving * th u s enumerates the rock species:...grained graywacke slates, clay slates, sericitic quartz slates, true quartzites, mica slates (often hornblendic)...U A R T Z V E IN S There is a large num ber of quartz veins. The largest one noted is a segregation which...slate and exhibits a heterogeneous quantity of quartz, and sm aller quantities of pyrite, chalcopyrite | | Gloyn-Jones, Jonathan Nicholas, Basson, Ian James, Stoch, Ben, Koegelenberg, CornĆ©, McCall, Michael-John (2022) Integration of StressāStrain Maps in Mineral Systems Targeting for IOCG Mineralisation within the Mt. Woods Inlier, Gawler Craton, South Australia. Minerals, 12 (6) 699 doi:10.3390/min12060699 | Journal (article/letter/editorial) | Ā© 2022 by the authors. Licensee MDPI, Basel, Switzerland. This article is an open access article distributed...formation (BIF), metapsammite and metapelitic units, quartzāfeldsparā biotite schist, gneissic calc-silicates...preferred orientation of biotite, sillimanite and quartzāfeldspar aggregates and an axial planar gneissic...Fe-rich hydrothermal fluids and mineralisation, inent Hill area, local wherein local extensional bends...components thesurrounding host units around the inent Hill deposit and at the contact of the gabbro/gabbrodiorite |
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