 | 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...alteration (stage-I veins): quartz+adularia+biotite+ pyrite+chalcopyrite+native gold (average 0.25 g/t)...phyllic alteration (stage-II veins): quartz+sericite+pyrite+chalcopyrite+bornite+sphalerite+native gold (average...Supergene kaolinitization is also extensive in the Baghu area and has replaced up to 50 percent of the hypogene...Systematic studies of fluid inclusions in the stage-II quartz samples found five types: monophase aqueous (I–type); |
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| Province) is actively mined in the eastern Black Sea Region of Turkey. This deposit consists of ore-bearing...E–W with a dip of 25uS. The ore-bearing quartz vein outcrops are slightly limonitized and hematitized...consists of coarse-grained sulphides such as chalcopyrite, galena, sphalerite, tetrahedrite, and secondary...secondary limonite veinlets in addition to pyrite. Quartz and calcite are the gangue minerals. The mineral...isotope data suggest that the Akgüney Cu–Pb–Zn vein-type deposits were formed by the leaching of metals |
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| suggested by the presence of quartz veins stained with iron, the Valdez district for many years received relatively...the possibility of finding mineral wealth in the region which they rapidly traversed on their way into...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...of the presence of workable ore bodies in this region was lacking. The Cliff mine became productive in |
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| Mesters Vig, East Greenland In 1948, galena-bearing quartz veins were discovered on the west coast of Mesters...1962. Teams from Koch's expeditions had been in the area in 19361938 but acting on instructions from Danish...Europeans to sail these waters in 1899. The Mesters Vig area consists of up to 1100 m high mountains intersected...ice-strengthened ships. Geology The Mesters Vig area is underlain by Carboniferous, Permian and Triassic...dolerite sills and dykes. Towards the south, the area is bordered by the Palaeogene Werner Bjerge alkaline |
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| (Licking Co.) and Zanesville (Muskingum Co.), a region of rolling, wooded hills. Here, prehistoric Indians...also quarried a rough, porous flintstone from outcrops, especially around McArthur, Vinton Co., for making...CONNEAUT, area pits, quarries, rd. cuts, etc.⎯cone-in-cone Calcite. CLERMONT COUNTY MILFORD, area creek...COUNTY WILMINGTON, area of Todd’s Ford, a mineral deposit⎯Hematite. COSHOCTON COUNTY AREA, townships of Washington...(on Geauga Co. line), area quarries⎯oilstone. DELAWARE COUNTY DELAWARE, area Co. exposures of blue clay |
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| this part of the state. In this rough, uncurried region are found the famed Fairburn agates, brilliantly...for gemstone materials. An extensive collecting region of agatized and opalized wood for high gem quality...Calcite crystals, Marcasite and Pyrite cubes. The area around the confluence of the Loup River with the...and gem petrified wood. BUFFALO COUNTY KEARNEY, area gravel bars and pits along the Platte R., especially...wood). CHEYENNE, DEUEL, GARDEN & KEITH COUNTIES AREA, between North and South Platte rivers and in all |
 | | Book (volume) |
| (Licking Co.) and Zanesville (Muskingum Co.), a region of rolling, wooded hills. Here, prehistoric Indians...also quarried a rough, porous flintstone from outcrops, especially around McArthur, Vinton Co., for making...CONNEAUT, area pits, quarries, rd. cuts, etc.⎯cone-in-cone Calcite. CLERMONT COUNTY MILFORD, area creek...COUNTY WILMINGTON, area of Todd’s Ford, a mineral deposit⎯Hematite. COSHOCTON COUNTY AREA, townships of Washington...(on Geauga Co. line), area quarries⎯oilstone. DELAWARE COUNTY DELAWARE, area Co. exposures of blue clay |
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| Geology of the Republic Quadrangle and a Part of the Aeneas Quadrangle Ferry County, Washington By SIEGFRIED...GEOLOGICAL SURVEY BULLETIN 1216 Geology of an area in northeastern Washington that contains important...silver deposits and a major structural feature, the Republic graben UNITED STATES GOVERNMENT PRINTING OFFICE...___________________________________________ Geologic sketch of the area.________________________________________ Metamorphic...Herron Creek_____________________________ Outcrop area and relation to other rocks_________-_____-_-_. |
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| ........ .. Pegmatitic quartz veins .... .. ......... ... ....... ... Quartz veins ... ... .. .........and stock-work deposits ..... .. ... .. .. . Gold-quartz veins ..... .. ....... .. .. .... .. .. Veins of..... ... .... ...... . ... .. .. Beaverlodge Lake area ... .. ... ... ...... ... ...... .... ... .... ......... .... ... .. . Black Lake area .... .. ... .. . Cree Lake area.. ........... ... ........ ... .......... .. Lac Ia Ronge area........ .. ..... ...... ... . . Amisk Lake area.. .... .. ... ..... ... |
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| 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 |
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| m' DEPOSITS ___ _ A 19-34 ______________ _ 19 Vein Deposits _________ ---- ________ ----- ____________________...Frontispiece II Fig. 1-Gold Crystals Associated with Quartz Crystals, Loud Gold Mine, White County, Georgia___... Dahlonega, Georgia.:.___ 80 Fig. 2-Auriferous Quartz Stringers in Partially Decomposed Rock, East, or...Deposits of Georgia Preliminary Map of Dahlonega District, Geergia_________ 36 276 Gold Deposits of Georgia...cases. where a pegmatite dike crosses a gold bearing vein at a small angle or runs for some distance by the |
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| 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...the deformed quartz matrix along late shear planes. Undeformed E - W trending banded quartz veins are present...development (along the walls of the N-S gold-bearing quartz veins) of a 5-m-wide carbonate-sericite-albite-pyrite...around the E-W quartz veins. Ultramylonites, hydrothermally altered rocks and quartz veins display similar |
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| 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 |
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| i Mineral Resources of the Sawtooth Primitive Area, Idaho By THOR H. KILLSGAARD and VAL L. FREEMAN...1319-D An evaluation of the mineral potential of the area -tTNITED STATES GOVERNMENT PRINTING OFFICE, WASHINGTON...System, but the act provides that each primitive area be studied for its suitability for incorporation...Primitive Area and vicinity, Idaho. The area discussed in the report includes the primitive area, as defined...bordering areas that may come under discussion when the area is considered for wilderness status. CONTENTS |
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| 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 |
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| ................................ J 15.-Fig. J. Quartz (etched)-Hart.'s l\Jine, Torrington ..........................• ······ ( 2. Rutile in Quartz (grass•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 ••••••••••••••••••••••••••• 123 Smith |
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| . . 12 2.1.1 Summary of the Owyhee County Study Area . . . . . . . . . . . . . . . . . . . . . . . 12.... . . 21 2.5 SUMMARY OF THE OWYHEE COUNTY STUDY AREA . . . . . . . . . . . . . . . . . 24 2.5.1 Summary... . . . . . . . . . . . . . 259 xii 3.36 ROSE QUARTZ CLAIM(?) (Site No. JV-41) . . . . . . . . . . ...of the northern part of the Owyhee County study area (Ekren and others, 1981). . . . . . . . . . . ....of the southern part of the Owyhee County study area (Ekren and others, 1981). . . . . . . . . . . . |
