 | | Journal (article/letter/editorial) | | associated with massive hematite at the 650-foot level. Quartz occurs as plates of minute transparent, colorless...mobilization of the REEs. SYNTHETIC FLUID INCLUSIONS IN QUARTZ. R. S. Darling and J. S. Ireland, Geology Department...been developed to synthesize fluid inclusions in quartz and other minerals. These “synthetic” fluid inclusions...rod-shaped cylinder cut from opticalgrade natural quartz is fractured and placed in a noble-metal tube along...along with some nutrient (powdered) quartz and a desired fluid (e.g., H,O, H,O-NaCl, H,O-CO,). The tube |  | | Journal (article/letter/editorial) | | Michael Walter photo July/August: Microcline, quartz, and albite, Kestral Pocket, Smoky Hawk mine, Teller...Scovil photo September/October: Gold and quartz, Colorado Quartz mine, Mariposa County, California; Scott...Albert Laws Kidwell (1919–2008), A. E. Smith, 71–72 Albite, Japan, 523; New York, 221, 451, 454 Allanite-(Ce)...twinning, 367; Virginia, 354 California, Colorado Quartz mine, 396–412 Carlson, E. H., Mineralogy and Paragenesis...Spectacular Amethyst from the Diamond Hill Quartz Prospect, Abbeville County, South Carolina, R. Jacquot |  | | Report (issue) | | 5AN FRANCISCO JUNE GEM- AND LITHIUM-BEARING PEGMATITES OF THE PALA DISTRICT, SAN DIEGO COUNTY, CALIFORNIA...org/details/gemlithiumbearin07jahn GEM- AND LITHIUM-BEARING PEGMATITES OF THE PALA DISTRICT, SAN DIEGO COUNTY, CALIFORNIA...HISTORICAL SKETCH GEOLOGY 4 4 8 9 9 Structure PEGMATITES Distribution and occurrence General structural...Paragenetic sequence of minerals Origin of the pegmatites ECONOMIC FEATURES OF THE PEGMATITE MINERALS...Feldspars Gem minerals Tourmaline Spodumene Bervl Quartz Other minerals MINING Prospecting and mining methods |  | | Report (edition) | | 32 v Section 2 Gemstones associated with pegmatites Chapter 6 Beryl group 35 Beryl ..............3 Siliceous gemstones Chapter 12 Quartz group 93 Gem-quality quartz.............................................................................. 94 Quartz mineral varieties ................................................................... 96 Quartz in pegmatites ..................................................................................... 97 Quartz in amygdales.................................. |  | | Report (edition) | | displaying folded bands of dark brown hematite, cherty quartz, and golden tiger eye. Bands are up to 10 mm thick....... 28 Section 2 Gemstones associated with pegmatites Chapter 3 Beryl group 33 Beryl properties ...3 Siliceous gemstones Chapter 9 Quartz group 91 Gem-quality quartz.............................................................................. 92 Quartz mineral varieties.................................................................... 94 Quartz in pegmatites........................................ |  | | Journal (issue) | | by R. V. Dietrich Italy Minerals of the Elba pegmatites..........................................................365 by C. A. Francis Pakistan Gem pegmatites of the Shingus-Dusso area, Gilgit, Pakistan....COVER: Tourmaline crystal group 9 cm long, with albite and lepidolite, mined recently at the Himalaya...will be inevitable; for instance, the Pakistan pegmatites covered here have also yielded superb aquamarine...p. 507-515.]* Famous mineral localities: the pegmatites of Laghman, Nuristan, Afghanistan (by P. Bariand |  | | Book (volume) | | chalcedony, occasionally with pale Amethysts, or Quartz crystals). CRAWFORD COUNTY PALESTINE, area deposits⎯Siderite...Jarosite, Marcasite, Malachite, Pyrite, Pyrolusite, Quartz, Selenite, Smithsonite and Sphalerite in any combination)...chalcedony, Sphalerite on chalcedony or Calcite, Quartz. 151 Illinois Niota Dewdrop Diamond Geode Location... WILL COUNTY LEMONT, area quarries⎯glistening Quartz replacement fossils. WILMINGTON, regional mines...The moraines of thrice glaciated Morgan Co. yield quartz gemstone pebbles, some Topaz, and now and then |  | | Book (volume) | | chalcedony, occasionally with pale Amethysts, or Quartz crystals). CRAWFORD COUNTY PALESTINE, area deposits⎯Siderite...Jarosite, Marcasite, Malachite, Pyrite, Pyrolusite, Quartz, Selenite, Smithsonite and Sphalerite in any combination)...chalcedony, Sphalerite on chalcedony or Calcite, Quartz. 151 Illinois Niota Dewdrop Diamond Geode Location... WILL COUNTY LEMONT, area quarries⎯glistening Quartz replacement fossils. WILMINGTON, regional mines...The moraines of thrice glaciated Morgan Co. yield quartz gemstone pebbles, some Topaz, and now and then |  | | Book (volume) | | gold-bearing areas. Lode deposits usually consist of Quartz veins in solid rock, while placer deposits occur...the SC borderSavannah River agate, chalcedony, Quartz gemstone, silicified oolite. CARROLL COUNTY CARROLLTON:...CHATTAHOOCHEE COUNTY AREA: stream gravelsgemmy chert, quartz pebbles (pastel colors), petrified wood, Pyrite;...minesAquamarine, Beryl, Amethyst, Garnet, Smoky Quartz crystals, black Tourmaline, etc. (the accessory...Rutilated Quartz crystals; (b) 1 mi. W of the school, exposed pegmatites Rutilated Quartz crystals; |  | | Book | | Litchfield County, where good crystals were taken from quartz veins in a variety of metamorphic, plutonic and...Litchfield, where a mass of white quartz on a ridge had once been mined for quartz, and large ilmenite masses...ilmenite crystals to 7 .5 cm in matrix of massive quartz from these dumps-adding that, in his judgment,...However, unusual discoveries in the famous alkaline pegmatites of Mount Malosa in the late 2000s include specimens...numerous crystal pockets, associated with small albite crystals; the platy, flattened-rhombohedral ilmenite |  | Theodore, Ted G., Blair, Will N., Nash, J. Thomas, McKee, E.H., Antweiler, J.C., Campbell, W.L. (1987) Geology and gold mineralization of the Gold Basin-Lost Basin mining districts, Mohave County, Arizona, with a section on K-Ar chronology of mineralization and igneous activity, and a section on implications of the compositions of lode and placer gold. Professional Paper 1361. US Geological Survey doi:10.3133/pp1361 | Report (issue) | | molded partly against rounded fragment of clear vein quartz. Collected from King Tut placer workings, Lost...disseminated gold --------------Fluid inclusions in a quartz-fluorite-white mica vein that cuts the Late Cretaceous...two-mica monzogranite - - - Comparison of fluids in a quartz-fluorite-white mica vein and in gold-bearing episyenitic...molded partly against rounded fragment of clear vein quartz. PLATE 1. Localities for commodities and compositional...---------------------6. Photograph showing coarse-grained quartz-feldspar leucogranite crosscutting schistosity |  | | Book | | dubious trail of float and, finally, sinking a prospect hole to see what might underlie a geologic formation...will find government bureaus anxious to help you prospect. Federal and state publications are available...administrators who depended on conquered tribesmen to prospect for valuable minerals, especially gold. As managers...Subparallel Biotite, potash feld- Volcanic Absence of quartz Dark green to black color Texture flow amphibole...Grainy Hornblende, olivine, pyroxenes Absence of quartz augite, Olivine present Plagioclase, Coarse |  | | Journal (article/letter/editorial) | | Rhodochrosite with tetrahedrite, chalcopyrite, and quartz, Sweet Home mine, Alma, Park County, Colorado....Colorado, 97 Actinolite, Vermont, 234, 239, 262 Albite, Michigan, 388; Vermont, 235, 239, 262 Alexander...Mine, ChaAarcillo, Chile, 34446; Rutile-Included Quartz, Waterbury, Vermont, 248-251; Scheelite, Camp Bird...Smithsonian Institution Gets a Herkimer “Diamond’ Quartz Pocket, 397401 Meteorites, 12-13, 124-26 Mica,...Twenty-second Rochester Mineralogical Symposium Quartz, 193; Arkansas, 135; Canada, 200; Colorado, 98 |  | | Book (volume) | | R. Rose Analyses of Primary Phosphates from Pegmatites in Maine and Other Localities .................Analyses for Crandallite-Group Minerals from Maine Pegmatites ............................. 337 Michael Brownfield...Mary visited, researched, and wrote about Maine pegmatites. Ben Shaub was also Professor of Geology at Smith...930's and l 940's. His "On the Origin of Some Pegmatites in the Town of Newry, Maine" is still read and...internationally recognized as an authority on granite pegmatites, mineralogy, and geology. Gene authored or co-authored |  | | Book | | Size Categories Dana's Classification of Minerals Quartz Family Gemstones The Various Names and Forms of...ancient gems), calcite, fluorspar, jadeite, pyrite, quartz family minerals ( agate, carnelian, chalcedony...C. from mines in Kenya. This amorphous form of quartz, with its brilliant flickering of rainbow colors...Reube~), topaz (probably citrine or yellow "topaz" quartz, assigned to Simeon), and carbuncle ( any bright...and diamond (no doubt rock crystal, i.e., clear quartz, assigned to N aphtali). Third row: ligure (possibly |  | | Report (issue) | | 21 Gabbro 23 23 intrusive 21 Granodiorite Quartz veins Lamprophyres Keratophyre 24 24 24 24 24...diabase containing xenoliths of Mariposa conglomerate Albite diabase containing xenoliths of Mariposa conglomerate...over part and of the map area. Diabase and albite diabase are common intrusive rock types in the...feet in thickness anywhere in the map area. Vein quartz and metachert debris predominate over other bedrock...lamprophyre and keratophyre and development of quartz veins also took place during this period. All the |  | | Report (issue) | | Petrography ~owerTertilary igneous rocks DSorite porphyry Quartz diorite porphyry Apache Hills composite stock Monzonite...62 62 65 66 68 Rhyolite tuff Rhyolite breccia Quartz latite Dike rocks Lamproghyre Trachyte lCerejltophyrcI...Hlatory and production aeology and mine description Prospect# ' Summary o f ore deposlte Puture prospecting... Corbett formation mrusting at Doyle Peak 8. Quartz vein along the Apache fault 9. LO. Step-faulting...sandstone Thln section of quartz rfloriLe porphyry Thln section of quartz monzonite g o ~ p h ~ l . |  | | Report (issue) | | gangue mainly calcite with smaller amounts of quartz. Prospect consists of stripped area about 150 ft by...Fairweather N 1/2 SE 1/4 quad. Prospecting, 1932-33. prospect. No other data available. Probably was a gold...Mt. Fairweather (18.2, 14.2) 58°48'N, 136°30'W Quartz vein in shear zone in granitic rocks contains tetrahedrite...molybdenite-bearing quartz have been found on glacier. Small gold-bearing quartz veins in mafic gneiss...exposed for only short distances along strike. Quartz fragments in stream-sediment sample contained finely |  | | Report (volume) | | deposit_____________________________________ El Carrizal prospect ___ -------------------------------ElHornopro...------------------------------------La Cadena prospect----------------------------------Chromite deposits...Aires mine_____________________________ SanJuan prospect----------------------------San Juancito prosp...------ ______________ ----- _________ ---Cerro Vivo prospect----------------------------------Other deposi...mine_________________________________ La Esperanza prospect ___ -------------------___ Chaguite deposits ___________________ |  | | Journal (issue) | | McEverts himself). They proceeded to sink several prospect holes and quickly discovered bonanza silver ores...Brumado districtBrazil, Bosch Coll. $7 Afghan pegmatites, Chuquicamata-Chile $7 v . 12/#4 v.1 6 /# 1...long, were removed with difficulty from the hard quartz breccia wall rock. Also, abundant masses of post-mine...mineral noted and, together with a little milky quartz, formed a nearly continuous vein that strikes N...to the south. The ore is in northward-trending quartz-stibnite veins in basalt which are apparently discontinuous |  | | Report (volume) | | . . . . . 13-37. Assay data: 13. Point Astley prospect 14. Spruce Creek prospects 15. Mineralized area...ultramafic area . . . . . . . . . . . . 21. Holkham Bay prospect . . . . . . . . . . . . . . . . . 22. Placer workings... Sweetheart Ridge prospect . . . . . . . . . . 27. Tracy Arm zinc-copper prospect . . . . . . . 28. Sumdum...between Sumdum copperzinc prospect and Tracy Arm 29. Sumdum copper-zinc prospect 30. Powers Creek stained...31-37. Assay data: 31. Portland prospect . . . 32. Sulphide prospect 33. Powers Creek placers 34. Fords |  | | Report (volume) | | ......................................... Gold-quartz lode mines.......................................CONTENTS Lode mines and prospects Continued. Gold-quartz lode mines Continued. Page. Grants Pass quadrangle...................................... 51 Kramer prospect.................................................................................... Blue Bell prospect............................................ Buffalo................................. G. E. Anderson prospect........................................ Calumet |  | | Report (issue) | | . . . . . . . . . . . . . . . 33 3.2 UNNAMED PROSPECT (Site No. JV-91) . . . . . . . . . . . . . . ... . . . . . . . . . . . . . . . 54 3.4 UNNAMED PROSPECT (Site No. JV-93) . . . . . . . . . . . . . . ... . . . . . . . . . . . . . . . 57 3.5 UNNAMED PROSPECT (Site No. JV-94) . . . . . . . . . . . . . . .... . . . . . . . . . . . . . . . . 3.6 UNNAMED PROSPECT (Site No. JV-95) . . . . . . . . . . . . . . .... . . . . . . . . . . . . . . 91 3.13 UNNAMED PROSPECT (Site No. JV-78) . . . . . . . . . . . . . . |  | | Report (volume) | | . 99 Humbolt prospect ......... : ................................... Skookona prospect ..................... . 100 Glen prospects ▪ 100 McG onagall prospect • 100 CON TENTS. 5 Economic geology—Continued...Greisiiirospect 101 Eureka prospect 101 Pennsylvania and Keystone prospects 102 Gold King prospect 103 Golden Eagle...Eagle prospect 103 Little Annie prospect 104 Silver Pick prospect 105 Galena prospect 105 Other gold lode...ellipsoidal. Devonian or Silurian: Totatlanika schist (quartz-feldspar schists and gneisses, with some metamorphosed |  | | Book | | Bibliography / 331 315 318 CHAPTER 14: GOLD DEPOSITS-QUARTZ-PEBBLE CONGLOMERATE AND QUARTZITE TYPE 335 The...importantly, to predict the environment where one may prospect for similar deposits. The scientific and economic...forgotten. The area in the vicinity of the Cariboo Gold Quartz and Island Mountain mines in the Barkerville district...Coromandel, was first exploited in the 1860s; the quartz deposits in Otago, South Island, were first worked...worked in the 1870s; and the productive quartz lodes at Reefton produced their first gold in the early |
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