 | | Report (issue) | | Loudoun County 143 Prince William County 149 Diabase quarries of northern Virginia 155 CAPTIONS Illustrations... List of Figures Figure 1. Index map showing region covered in this report. Stfaded area is covered...Figure 2. Block diagram of the Washington, D.C. region showing physiographic provinces and major geographic...Complex at Ilchester, Maryland. Figure 6. Triassic diabase dike forming a ridge north of Route 7 near Dranesville...and locations of mines in the Soldiers Delight region, Baltimore County, Maryland. Adapted from Pearre |  | | Journal (article/letter/editorial) | | weathering or alteration of a single mineral, chalcopyrite, the dominant primary ore mineral of copper...both the mining industry and the collector, chalcopyrite forms under a wide variety of geologic conditions...exceptional with respect to the parent species, chalcopyrite. However, at one time several American localities...localities produced truly exceptional chalcopyrite specimens. One such locality is the French Creek iron...source of some of the world’s best chalcopyrite crystals. Chalcopyrite is well known as a brass-yellow, |  | | Journal (issue) | | Behnke Northbrook, IL Werner Lieber Heidelberg, W. Germany Eric Offermann Arlesheim, Switzerland Jeffrey A...slavia), C aldbeck Fells (England), SEM , Eugui quarries (Spain) $10 v .2 2 /# 3 M essina m ines (So....Hill Cu-Zn-Pb occurrence known locally as the “Chalcopyrite Room ” is remarkably complex, with 50 species...locality known to local collectors as the “ Chalcopyrite R oom .” The name derives from the most prominent...occurs which is still under investigation. The Chalcopyrite Room lies below the east terminus of the 1220 |  | | Book | | torms, rounded edges, and blue opalescence. ChalcopYrite (76(locality uncertaln)16l,p.l07)~ One inch...titan te i8 r.lative~1 large SJl.sunts. Grgit. Quarries (76(42 15'58",73000'43tt)~ 2 16'11",73 01'U tt...uaknown)16l,p.84)--Old Gross Quarry. Dolomite Harb e quarries (with variable amounts of calCite, phlogopite...pyroxene-hornblende. carrying.uch pyrhottite and a little chalcopyrite, considerable coarse granular calcite and graphite...limestone quarries 74(42 21' 34·',73 22'12"--Cone Hill )--One quarry at this location. Two quarries 260 feet |  | | Book | | localities for good ilmenite crystals exist in the region (Brunet, I 977b ). NEW YORK Amity, Orange County...Alberene and Old Dominion quarries, Albemarle County. In these two soapstone quarries, tabular ilmenite crystals...in Switzerland, it is only in the Maderanertal region of east-central Canton Uri that clefts bearing...clefts are found fairly commonly throughout this region, such that only a handful of notable finds during...about 20 other quartz mines are operated in the region of the Subpolar Urals, northwest of Saranpaul, |  | | Report (issue) | | magnetite, ilmenite, chromite, pyrrhotite, and chalcopyrite occur. These have been regarded in the past...limestones the shales, etc., most. effect of a diabase dike may be practically nil, where under other...magnetite, ilmenite, rutile. Sulfides: pyrite, chalcopyrite, pyrrhotite, pentlandite; Element: DYNAMIC-METAMORPHS...Zeolites are of common occurrence in the Triassic diabase quarries of Adams, Lancaster, Berks, and ; Hydrous... spinel; Sulfides: pyrrhotite, pentlandite, chalcopyrite Elements: diamond, iron, platinum. ; HYDROTHERMAL |  | | Report (issue) | | apatite, azurite, bomite, bastnaesite, cerianite, chalcopyrite, chlorite, chrysocolla, clinzoisite, cuprite...weinschenkite zircon. APPOMATTOX COUNTY: bornite, chalcopyrite, chrysocolla, hematite, limonite, magnetite...naesite, beryl, betafite, biotite, bronzite, chalcopyrite, chrysocolla, clinozoisite, columbite-tantalite...bornitc, bytownitc, chalcanthitc, chalcocite, chalcopyrite, chalcosideritc, chloritoid, copper, corundum...amphibole, andalusite, ankcrite, barite, calcite, chalcopyrite, chalcosiderite, chlori toid, cryptomclane |  | | Book (edition) | | opened or systematically worked, as in mines and quarries, the amateur is far better able to keep track...system in 1735, followed by Friedrich Mohs of Germany, who published his in 1820. In 1758, Axel Frederic...Wilhelm Scheele (1742-1786) in Sweden, and in Germany by Martin Heinrich Klaproth (1743-1817), the merits...carried out by Eilhard Mitscherlich (1794-1863) in Germany; these did much to explain hitherto puzzling variations...example, looks like freshly polished brass, chalcopyrite looks like brass that has discolored a bit | | | Book (edition) | | opened or systematically vvorked, as in mines and quarries, the amateur is far better able to keep track...system in 1735, followed by Friedrich Mohs of Germany, who published his in 1820. In 1758, Axel Frederic...Wilhelm Scheele (1742-1786) in Sweden, and in Germany by Martin Heinrich Klaproth (1743-1817), the merits...carried out by Eilhard Mitscherlich (1794-1863) in Germany; these did much to explain hitherto puzzling variations...example, looks like freshly polished brass, chalcopyrite looks like brass that has discolored a bit, |  | | Report (issue) | | Gregory Herman6 and John Curran6 1A1-4G3 1. Diabase and Brunswick basalt in the Watchung zone 1A1-1F4...Apx-Apxiv Appendix 1. Diabase and Brunswick basalt in the Watchung zone 1A. Well 1 –- Diabase, Lambertville City....................... 1B. Wells 2 through 5 –- Diabase framework, East Amwell Township.................................................. 1C. Well 6 – Diabase, Hopewell Township............................................................... 1D. Well 7 – Diabase, East Amwell Township......................... |
|
