 | | Report (issue) |
| suggested by the presence of quartz veins stained with iron, the Valdez district for many years received relatively...gold seekers must have passed in sigfet of the quartz vein outcropping on the north shore of the inlet which...however, persistently kept up the search for gold quartz, and some veins were staked as early as 1898, but...possibility of developing here a new auriferous lode district. As a result, several hundred lode claims were...convinced that an immediate detailed survey of the district was justified. As an accurate topographic base |
 | | Journal (article/letter/editorial) |
| EâW with a dip of 25uS. The ore-bearing quartz vein outcrops are slightly limonitized and hematitized...the D-1 and D-2 veins. The first contains only pyrite, whereas the second consists of coarse-grained...secondary limonite veinlets in addition to pyrite. Quartz and calcite are the gangue minerals. The mineral...isotope data suggest that the AkguĚney CuâPbâZn vein-type deposits were formed by the leaching of metals...located near to AkguĚney Village in the KabaduĚz District of Ordu Province within the Eastern Pontide region |
 | | Journal (article/letter/editorial) |
| also intruded within the shear zone. The gold-rich quartz veins are located within the ultramylonitic western...of the shear zone. These N-S-trending laminated quartz veins formed during the late increments of shearing...association (pyrite, galena, native gold, sphalerite) crystallized in the deformed quartz matrix along...shear planes. Undeformed E - W trending banded quartz veins are present in the mylonitic eastern part...the N-S gold-bearing quartz veins) of a 5-m-wide carbonate-sericite-albite-pyrite secondary mineral association |
 | | Report (issue) |
| GEOLOGY OF THE ATLANTIC CITY-SOUTH PASS MINING DISTRICT WYOMING by' . Frank CÂť Armstrong ^l OPEN FILE...regional structure in the Atlantic City-South Pass district.................................................Photomicrograph of thin section of strained vein quartz showing mortar structure, Duncan mine .........i^l Figure 1 Index map, Atlantic City-South Pass district, Fremont County, Wyoming .......................Geologic sketch map, Atlantic City-South Pass district, Fremont County, Wyoming .................... |
 | | Report (issue) |
| Mesters Vig, East Greenland In 1948, galena-bearing quartz veins were discovered on the west coast of Mesters...bituminous shale and a variegated clastic unit. Lower Triassic silty shales overlie the Upper Permian...some 300 km2 in the Mesters Vig area. Two major vein zones are associated with the border faults of the...graben. The Sortebjerg-Blyklippen vein zone forms a discontinuous vein system 15 km long along the western...Sortebjerg, five outcrops occur over a distance of 4 km, each being a silicified, quartz-vein zone orientated |
 | Smith, C.W., Samater, R.M., Hussain, M.A., Basheer, M.A., Trent, V.A., Cole, J.C. (1985) Preliminary report on the gold deposits at Al Habla, Kingdom of Saudi Arabia. Open-File Report Vol. 1985 (85-128) US Geological Survey doi:10.3133/ofr85128 | Report (issue) |
| worked gold-bearing quartz veins. Most of the workings are trenches following vein systems, which ordinarily...of ancient workings in the area. Only isolated outcrops of veins are exposed, and in most places they...known vein systems are covered by a veneer of alluvium. Detailed, methodical sampling of quartz from all...not reach the bottoms of the more intensely mined vein systems. Fractures in granite that allowed for the...sites of gold and quartz deposition and in most of the area dikes and gold-bearing quartz veins are found |
 | Niroomand, Shojaeddin, Hassanzadeh, Jamshid, Tajeddin, Hossein Ali, Asadi, Sina (2018) Hydrothermal evolution and isotope studies of the Baghu intrusion-related gold deposit, Semnan province, north-central Iran. Ore Geology Reviews, 95. 1028-1048 doi:10.1016/j.oregeorev.2018.01.015 | Journal (article/letter/editorial) |
| Mineralization is in the form of subparallel sheeted quartz veins that are up to ~1 km long within extensional...potassic alteration (stage-I veins): quartz+adularia+biotite+ pyrite+chalcopyrite+native gold (average 0...and phyllic alteration (stage-II veins): quartz+sericite+pyrite+chalcopyrite+bornite+sphalerite+native...Systematic studies of fluid inclusions in the stage-II quartz samples found five types: monophase aqueous (Iâtype);...mil SMOW). In addition, δ34S values in stage II pyrite and chalcopyrite sulfide minerals range from +1 |
 | | Journal (article/letter/editorial) |
| the argument that quartz crystal aggregates formed in vugs along the underside of quartz veins, filling...incapable of supporting leaching reactions. The quartz in the sheets which follow the cleavage planes...Sub-Arctic Urals]. Virtually all of the crystalline quartz in the region is found in these faults. The thrusts...the dip of the cleavage planes in the rocks. The quartz veins of the area are classified with respect to...of the quartz veins in the area; veins in transverse faults are much less common. The quartz veins of |
 | | Report (issue) |
| ........ .. Pegmatitic quartz veins .... .. ......... ... ....... ... Quartz veins ... ... .. .........and stock-work deposits ..... .. ... .. .. . Gold-quartz veins ..... .. ....... .. .. .... .. .. Veins of......... .... ..... .... .... .... ... . Kenora district (Patricia portion) .... ... .... . Red Lake area... .. .. .. .... .. .... .. ...... ... . Kenora district...................... .... .. ............. ..... .. ... .... .. .. .. .. .. .... Rainy River district..... .. ..... .... ..... .. ........ . .. ... |
 | | Report (volume) |
| ___ Granodiorite, quartz monzonite, and quartz diorite Leucocratic (white) quartz monzonite ______ ___...group ________ Browns Creek prospect ____ _ Money quartz prospect ____________ China Basin _____________________...82 91 91 96 96 98 99 99 100 101 101 102 Massive quartz deposit _______________1_____ Alphabet group _...Photograph showing prospect bench in massive quartz vein, Basin claims ____________________ 46 15. ...has been produced from high-grade pockets in a quartz vein at the Little Queens mine. Other pockets of high |
 | | Book (volume) |
| also quarried a rough, porous flintstone from outcrops, especially around McArthur, Vinton Co., for making...crystals, Fluorite (fluorescent), , Galena, Marcasite, Pyrite, Selenite and Sphalerite. A few alluvial Diamonds...exposures of blue clay, as clusters and nodulesâŻPyrite (crystals sharply cubic). FRANKLIN COUNTY COLUMBUS...blue clay in rd. cuts, pits, quarries, excavationsâŻPyrite (clustered crystals sharply cubic). HIGHLAND COUNTY...flint, jasp-agate, jasper, Smoky Quartz 337 Ohio crystals, clear Quartz. From Brownsville, Licking Co |
 | | Report (volume) |
| _-_-____-__-__ Quartz latite porphyry_________________________________________ Quartz monzonite east...65 66 68 70 70 71 71 73 73 74 74 75 Granophyric quartz monzonite._____-__________-___---___---___- 75...______________________ Short faults west of Republic district vein system.________ Faults just east of Republi...____________ Fault zone along the Republic district vein system.____________ High-angle faults of east...___________------_--________________________ Republic district vein system_______________________________ Summary |
 | | Book (volume) |
| also quarried a rough, porous flintstone from outcrops, especially around McArthur, Vinton Co., for making...crystals, Fluorite (fluorescent), , Galena, Marcasite, Pyrite, Selenite and Sphalerite. A few alluvial Diamonds...exposures of blue clay, as clusters and nodulesâŻPyrite (crystals sharply cubic). FRANKLIN COUNTY COLUMBUS...blue clay in rd. cuts, pits, quarries, excavationsâŻPyrite (clustered crystals sharply cubic). HIGHLAND COUNTY...flint, jasp-agate, jasper, Smoky Quartz 337 Ohio crystals, clear Quartz. From Brownsville, Licking Co |
 | | Book (volume) |
| nodules, fossils, Calcite crystals, Marcasite and Pyrite cubes. The area around the confluence of the Loup...landsďžvertebrate fossil remains; ď
Pine Ridge, areaďžQuartz concretions, agates, petrified wood, fossils, etc...quarriesďžCalcite, Quartz crystals; ď SE 3 mi., quarry on E bank of the Blue R.ďžgeodes (lined with Quartz or rare...tapped and untapped sources for gems and gemstones: quartz family minerals, pegmatite crystals, Turquoise...with interesting gangue minerals, Marcasite, Pyrite, Quartz and the usual assortment of associated minerals |
 | | Report (issue) |
| m' DEPOSITS ___ _ A 19-34 ______________ _ 19 Vein Deposits _________ ---- ________ ----- ____________________...Frontispiece II Fig. 1-Gold Crystals Associated with Quartz Crystals, Loud Gold Mine, White County, Georgia___...80 Fig. 2-Auriferous Quartz Stringers in Partially Decomposed Rock, East, or Lower, Cut, Findley Gold Mine...Deposits of Georgia Preliminary Map of Dahlonega District, Geergia_________ 36 276 Gold Deposits of Georgia...through large open cuts into mills situated .at lower levels. The depth to which the deposits could be |
 | | Journal (volume) |
| Geologist C. A. Logan, District Mining Engineer C. McK. Laizure, District W. Burling Tucker, Reid...Francisco - District Sampson, Assistant Mining Engineer District Engineer Chas. V. Averill, District Mining...Francisco San Francisco TABLE OF CONTENTS REPORTS OF DISTRICT MINING ENGINEERS Page 1 Sacramento Field Division...mining activities of the State, prepared by the district mining engineers are given. Special articles dealing...possibilities, and developments). REPORTS OF DISTRICT MINING ENGINEERS In 1919-1920 the Mining Bureau |
 | | Report (issue) |
| ......................................... 5 Vein quartz ......................................................................................... 164 Quartz veins ..................................................................................... 196 Quartz veins ..................................................................................... 209 Quartz veins ...........................................146 Photomicrograph showing fine chert containing quartz patches and diffuse bedding (Moora silica mine) |
 | | Report (issue) |
| ................................ J 15.-Fig. J. Quartz (etched)-Hart.'s l\Jine, Torrington ..........................⢠¡¡¡¡¡¡ ( 2. Rutile in Quartz (grassâ˘atone)-Tingha .............................................................} 3. Nath ¡e Bismuth in Quartz-Kingsgatc ................................... ........... .) 32.-Fig. 1.-1\-Iap of the Barrier District ................................................Torrington........................... l2-2 Cook's Vein, St:innum â˘â˘â˘â˘â˘â˘â˘â˘â˘â˘â˘â˘â˘â˘â˘â˘â˘â˘â˘â˘â˘â˘â˘â˘â˘â˘â˘ 123 Smith |
 | | Journal (volume) |
| Olaf P. C. A. Logan, District Mining Engineer C. McK. Laizure, District W. Burling Tucker, Reid...Engineer District Mining Engineer Sampson, Assistant District Engineer Chas. V. Averill, District Mining...Francisco - San Francisco TABLE OF CONTENTS Page DISTRICT REPORTS OP MINING ENGINEERS Redding Field Division...EMPLOYMENT SERVICE PUBLICATIONS 7 91 91 Gold Quartz Deposits ADMINISTRATIVE MINERALS AND STATISTICS...possibilities, and developments). REPORTS OF DISTRICT MINING ENGINEERS In 1919-1920 the Mining Bureau |
 | | Report (issue) |
| . . . . . . . . . . . . . 259 xii 3.36 ROSE QUARTZ CLAIM(?) (Site No. JV-41) . . . . . . . . . . ...3.1-21. Looking northwest at the grass-covered lower tailings impoundment at the Silver Rock Mine (Roll...Open stopes to the south of the shaft along the vein at the Golden Crown Mine (Roll 00K7, frame #15).... . . . . . . 206 Figure 3.28-9. Sketch of the lower workings at the Overall Mine. . . . . . . . . .... . . . . . . 225 Figure 3.30-3. Thick white quartz vein just north of the caved shaft(?) at the Last |
 | | Journal (volume) |
| Nevada Mining at Bingham, Utah The Greenwater District Ditto Ditto Ditto Abyssinia, Minerals In The...Charles [64 James W. 82 431 114 Nelll 815 District, British W Columbia, The 783 431 795 736 241...Tube-Mill Lining Forbes Rlckard 511 17 The Boundary District The Mineral Output of. In 1906 Broken Hill, Acid...Editorial Wm. Amalgamation of Copper Ore Pan Amalle District of California, The American Copper Spiral Pipe...E. California, Alluvial Mining In The Amalle District of 785, 818 The Ancient River Channels of 567 |
