 | | Journal (article/letter/editorial) | | Gold Depositsof the Dahlonegaand Carroll County Gold Belts, Georgia JERRYM. GERMAN GeorgiaGeologicSurvey...UniveterFormation.Mostgolddepositsof the Dahlonega and Carroll County belts can be groupedinto six districts:the...smallerscale(Yeates called the Dahlonegaand the Carroll County gold et al., 1896). belts.Thesebeltscanbe tracedacross...tracedacross Georgiafrom Gold was first discoveredin Georgia in 1829. For Alabamato North Carolina(Fig. 2) andconsistof...political and Countybeltsarelargelyconfinedto the New Georgia economicconditionsand the availability of mining |  | | Report (issue) | | NORTHEASTERN PORTION OF THE DAHLONEGA GOLD BELT Jerry M. German Georgia Department of Natural Resources...Division Georgia Geologic Survey •,, THE GEOLOGY OF THE NORTHEASTERN PORTION OF THE DAHLONEGA GOLD BELT...BELT Jerry M. German .( Georgia Department of Natural Resources J. Leonard Ledbetter, Commissioner...Figures Figure Page 1. Geographic extent of the Dahlonega gold belt showing study area ...................northeast of the Dahlonega area ....................... . 14 15. Part of the Dahlonega gold belt showing |  | | Report (issue) | | <:I·:OR<: I A. 1'1.. ·1 TF I GEOLOGICAL SURVEY OF GEORGIA W. S. YEATES, State Geologist BULLETIN No. 4-...PRELIMINARY REPORT ON A PART OF THE Gold Deposits of Georgia BY W.S.YEATES State Geologist AND S. W. MCCALLIE...Geological Survey of Georgia (Ex-Officio) His ExcELLENCY, W. Y. ATKINSON, Governor of Georgia, PRESIDENT THE...the Advisory Board of the Geological Survey of Georgia, SrR: - I have the honor, to submit, herewith,... State Geologist. • THE GOLD DEPOSITS OF GEORGIA CHAPTER 1 THE OCCURRENCE AND HISTORY OF GOLD |  | | Report (issue) | | <:I·:OR<: I A. 1'1.. ·1 TF I GEOLOGICAL SURVEY OF GEORGIA W. S. YEATES, State Geologist BULLETIN No. 4-...PRELIMINARY REPORT ON A PART OF THE Gold Deposits of Georgia BY W.S.YEATES State Geologist AND S. W. MCCALLIE...Geological Survey of Georgia (Ex-Officio) His ExcELLENCY, W. Y. ATKINSON, Governor of Georgia, PRESIDENT THE...the Advisory Board of the Geological Survey of Georgia, SrR: - I have the honor, to submit, herewith,... State Geologist. • THE GOLD DEPOSITS OF GEORGIA CHAPTER 1 THE OCCURRENCE AND HISTORY OF GOLD |  | | Report (issue) | | TY, GEORGI A PLATE t GEOLOGICAL SURVEY OF GEORGIA S. W. McCALLIE, State Geologist BULLETIN No.... 19 SECOND REPORT ON THE GOLD DEPOSITS OF GEORGIA BY S. P. JONES Assistant State Geologist ATLANTA...Survey of Georgia in the Year 1909 (Ex-Officio) His ExcELLENCY, HOKE SMITH, Governor of Georgia PRESIDENT...Schools LETTER OF TRANSMITTAL GEoLOGICAL SuRVEY OF GEoRGIA, ATLANTA, June 15, 1909. To His Excellency, HoKE...the Advisory Board of the Geological Survey of Georgia. SIR: I have the honor to transmit herewith for |  | | Report (issue) | | orth Carolina and South Carolina ______ ____ _ Georgia ___________________________________ _ Alabama ...__ _________________________ _; _____ _ Barren quartz veins ________________ _ Mineralized zones ___________...34 35 35 36 39 44 44 45 46 47 47 49 49 50 50 Mine descriptions ___________ --------- -- .. -------...___ _______________________ _______ _ Fauquier County ____ ______ ______ _____ _____ _ Franklin ____...properties _________ .. _____________ _ Halifax County ______ - _____ - __________ ~- _'- __ _ Virgilina |  | | Report (issue) | | COVER PHOTO : Gold nugget from Dukes Creek, White County, weight 5 oz., 12 dwt., approx. 2x. BACK COVER...approx. 1.5x. Lower left - Goethite from Pulaski County, approx. lx. Right - Magnetite crystal face showing... MINERALS OF GEORGIA: THEIR PROPERTIES AND OCCURRENCES by Robert B. Cook STATE OF GEORGIA DEPARTMENT OF............................................. 153 Quartz ........................................................................................... 170 County Index ........................................ |  | | Book (edition) | | haunting...” A guide to Ghost Alaska, Towns Georgia, North and Mining Camp Sites in the West, Southwest...Mining Camp Sites Southwest, Northwest, Alaska, Georgia, lina, Tennessee, British Columbia, and IT: A...Town in Buena Park offers this panorama of a Calico mine with workers digging and loading ore. CONTENTS...89 CONTA EOTE a 2 i WP re a 2 ee go Colorado — Georgia alad fa scebimelteiniesiaite/efe) kevin] ieche...Concord. Georgia: Gold was found at quantities. 1830 To 1848 Active gold mining in Georgia, North |  | | Journal (article/letter/editorial) | | potassicassemblage producedby thisfluid. Oxygenisotope ratiosof quartz in the orthoclase-and biotite-stableveinsare identicalto...Oxygenisotoperatiosof quartz of the later assemblages (8.6-10.4%0) are heavier than quartz of the earlier potassic...types and, by analyzing fluid inclusionscontainedin quartz hence, systematicscannotbe established. occurringwith...analysis magmatic temperatures, and from the Whim Hill were thosewhich were felt would provide a gross...restrictedarea. lization.Fluid inclusionsin a late quartz + sericite The choicewas basedon geologiccriteria |  | | Journal (article/letter/editorial) | | Unexposed rocks 282 Exposed rocks 284 Igneous rocks 285 Quartz diorite silis 285 Hanover intrusive 287 Santa Rita...crystallization 288 Periods of mineralization 289 Whim Hill breccia 289 Description 289 Fragments 290 Matrix...Aplite 293 Hornblende granodiorite porphyry. 294 Quartz granodiorite porphyry 296 Latite 298 Age relationships...332 Quartz porphyry dikes 335 General statement 335 Hanover group 335 Santa Rita group 336 Quartz diorite...mineralization on the East Hill 341 Epidote alteration in the Groundhog Mine 344 Significance of dike and |  | | Report (volume) | | Deposits of minerals of wide distribution, such as quartz and calcite, have been omitted, except those that...Florida............Dr. E. H. Sellards, Tallahassee. Georgia..........Dr. S. W. McCallie, Atlanta. Illinois...North Carolina.. .Dr. Joseph Hyde Pratt, Chapel Hill. North Dakota... .Dr. A. G. Leonard, Grand Forks...See Bauxite and Hallpysite. Asbestos. Tallapoosa County, with corundum deposits near Dudleyville; not found...commercial quantity or quality. Asphalt. Colbert County, small quantity has been shipped from near Leighton; |  | | Journal (article/letter/editorial) | | granodiorite is known as the Whim Hill breccia. It is only in the Whim Hill breccia that the phenomenon...greatest dimension. The fragments are cemented by quartz, magnetite, oxidized copper minerals and orthoclase...occur in the cement. Frc. 1. Handspecimen of Whim Hill breccia. A microscopic examination of the breccia...fracture. Mineralization in the fracture consists ol quartz, magnetite, and a small amount of orthoclase. The... Photomicrograph showing desericitization in Whim Hill breccia. .S, white areas to both sides of veinlet |  | | Journal (article/letter/editorial) | | Sillitoe and Sawkins'hypothesisto (1971) and the Whim Hill brecciaat Santa Rita, becomeoperative,large quantitiesof... BRECCI/I PIPES Observational 541 Facts The Whim Hill brecciais an elongatebodyin plan, 500 meterslong...situatedin the apicalregion of the stock. The Whim Hill brecciacontainsangularfragments of Santa Rita'...blocks 30 centimetersacross. The majorityof the Whim Hill pipeis composed of larger (6--10 cm) blockslocally...and Sawkins, 1971.) // what smallerthan the Whim Hill, but displayimportant features that are relevant |  | Lesure, F.G., Watts, K.C., Finley, J.L., Jackson, J.C., Edwards, C.A. (1991) Analyses and descriptions of geochemical samples, northeastern part of the Dahlonega gold belt and vicinity, northeastern Georgia. Open-File Report Vol. 1991 (91-362) US Geological Survey doi:10.3133/ofr91362 | Report (issue) | | northeastern part of the Dahlonega gold belt and vicinity, northeastern Georgia by F. G. Lesure 1 , K...amphibolite, and quartzite, or vein quartz in saprolite. Samples of vein quartz generally contain some enclosing...from roadcuts, surface and underground mine workings, and mine dumps. Locations are given by quadrangle...longitude. Sixty-seven percent of the samples from old mine areas and 24 percent from roadcuts contain gold...determination of 0.02 parts per million (ppm). Half of the mine samples and three-fourths of the roadcut samples |  | | Report (volume) | | ............................................. Georgia..................................................of minerals that are widely distributed, such as quartz and calcite, have been omitted, except those that...Florida-______Dr. E. H. Sellards, Tallahassee. Georgia,_____Dr. S. W. McCallie, Atlanta. Idaho______.Mr...Albany. North Carolina_.Dr. Joseph Hyde Pratt, Chapel Hill. North Dakota_.Dr. A. G. Leonard, Grand Forks. Mr...See Bauxite and Halloysite. Asbestos. Tallapoosa County, with corundum deposits near Dudleyville; not found |  | | Journal (article/letter/editorial) | | hydrothermalactivity, and supergene effects. Potassium at each mine is enriched as much as twice over similar barren...supergeneprocesses. It has long been recognizedthat the later mine whetherthis potassiumenrichmentresultsonly from...geometry N E FIERRO STOCK X•SANTA RITA (CHINO) MINE models been assessed. Theoreticalcrystalchemicalconsiderations...with chemical analyses, examined variation from mine to mine. Potassium fixation in potassium,uranium, and...superimposeddominantly uranium, and thorium from mine to mine with dison phylliczones,in part becauseof the |  | | Journal (article/letter/editorial) | | Fluid inclusions of apparent primary origin in quartz from both porphyry COl)per and skarn ore at Santa...primary inclusionsin quartz from all major periods of depositionincluding: (1) early quartz veins associatedwith...potassicalteration, (2) later quartz veins associatedwith sericitic and pyritic alteration, and (3) quartz-magnetite-sulfideveins... Filling temperaturesin early quartz are no higher than in late quartz, both being predominantly in the...moderate and one with high salinity, depositedthe quartz of the deposit and that at least the high salinity |  | | Journal (article/letter/editorial) | | 2016 A History of Mineral Collecting at the Chino Mine VIRGIL W. LUETH New Mexico Bureau of Geology and...Socorro, New Mexico 87801 vwlueth@nmt.edu Grant County, New Mexico RONALD B. GIBBS ROBERT M. NORTH Freeport...ron_gibbs@fmi.com robert_north@fmi.com T he Chino mine is probably one of the oldest collecting sites in...collected at the site since prehistoric time. The mine derives its name from the Spanish term for chalcopyrite...long been reported. The Chino mine is located in eastern Grant County, New Mexico, approximately 12 miles |  | | Report (issue) | | 265 Tripoli and rottenstone__ __ _____ ___ __ 266 Quartz abrasives____________________ 266 Artificial a...sulfides____________________________ Sulfide-bearing quartz veins__________ Native copper deposits __________...pinnacles beneath soil cover, Bluegrass, Highland County, Va_ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _...transverse joints cutting shale at Poverty, Highland County, V a_ _ _ __ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _...__ 24. Strip-mine areas and coal-bed fires in the Appalachian Region__ 25. Strip coal mine, Coalton, W |  | | Journal (article/letter/editorial) | | N•ELSEN Abstract The Santa Rita stock formed from a quartz monzonitemagma that intruded gently dippingsedimentaryrocks...veinletsof pegmatitic and aplitic orthoclase and quartz, barren quartz, and molybdenite-bearingquartz; (b) pyr...after plagioclase(orthoclase unaltered),and (d) quartz-sericite(2Mx muscovite)after plagioclaseand orthoclase...stock, is concentrated in veins in the zone of quartz-sericitealterationat the periphery of the stock... and Santa Rita and contact 42 Vitreous gray quartz veinlets.................. Chalcopyrite-pyrite |  | | Report (issue) | | General Geology of Santa Rita Quadrangle Grant County, New Mexico By WILLIAM R. JONES, ROBERT M. HERNON...porphyry__________________________ Quartz diorite porphyry_____________________ Hornblende quartz diorite-__________________...Continued Quartz monzonite porphyry of the Santa Rita stock__ _____________________--___---_--__ Quartz latite...porphyry dikes _________________ Quartz monzonite porphyry dikes_____-__-_--Quartz latite porphyry dikes _________________...age___ Trevarrow plug and apophyses_______---_ Other quartz latite porphyry dikes. _______ Rhyodacite porphyry |  | | Journal (article/letter/editorial) | | Chile San Francisco de Los Andes, Argentina Quartz diorite, Paleocene 4/1 180 x 95 >170 Sandstone...shale, siltstone Angularto Abundant rounded quartz diorite porphyry Late Carboniferous- Early Permian...magnetite, molybdenite Quartz,calcite, ankerite,laumontite Faults,joints, Quartz, albite, Fault related...chalcopyrite Quartz, barite, Cu (Breton pipe) Not recognized Absent garnet, quartz Sericitic (t)...silicate Pyrite, chalcopyrite, molybdenite,bornitc Quartz, sericite, chlorite, tour- Syenite(?) body 1 |  | | Journal (article/letter/editorial) | | SilvertonCaldera,Colorado(5, p. 151). Some,like the Whim Hill breccia(27, p. 289) in the granodioriteporphyrystockat...brecciapipe in Yugoslaviathe ganguemineralsare mainly quartz and carbonates,and at the surface,partly obscuringthe...metallizationsuggests a commonorigin." At the Plutus Mine in Tintic (15, p. 362) pebbledikes and bodiesof...granodiorite blocks are entirely replaced by sericite, quartz, and sulphides .... The outline of the blocks can...surroundingthe central core is composedchiefly of chlorite, quartz, and orthoclasewith minor apatite and sulphides |  | Monecke, Thomas, Monecke, Jochen, Reynolds, T. James, Tsuruoka, Subaru, Bennett, Mitchell M., Skewes, Wiley B., Palin, Richard M. (2018) Quartz Solubility in the H2O-NaCl System: A Framework for Understanding Vein Formation in Porphyry Copper Deposits. Economic Geology, 113 (5) 1007-1046 doi:10.5382/econgeo.2018.4580 | Journal (article/letter/editorial) | | OF ECONOMIC GEOLOGISTS Vol. 113 August No. 5 Quartz Solubility in the H2O-NaCl System: A Framework...the formation of porphyry veins that is based on quartz solubility calculations in the H2O-NaCl system...The model predicts that high-temperature (500°C) quartz in A veins of deep (4 km) porphyry deposits forms...deposits of intermediate depths (~1.5–4 km), A vein quartz is mostly formed through cooling of ascending hydrothermal...result in quartz precipitation, forming so-called banded veins. The high-temperature quartz in A veins |  | | Journal (article/letter/editorial) | | C•a/C•2 values,where applicable,were measuredon quartz (40 samples),K-feldspar(12), biotite (16), sericite(23)...biotite alteration. The oxygen isotopedata for the quartz-Kfeldspar-biotite-chalcopyrite assemblages alsosupporta...K-feldspars,(2) isotopicallyheterogeneous minerals,suchas quartz of differentorigins,that are intimatelyintergrownand...criteria for recognizingisotopicequilibrium. In the quartz-sericiteassemblagethe 80 x8 of the igneousquartz...igneousquartz is preservedand is differentfrom that of quartz precipitatedduring the sericitizationprocesses. The |
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