enow.com Web Search

Search results

1. Results from the WOW.Com Content Network

2. Vein (geology) - Wikipedia

   en.wikipedia.org/wiki/Vein_(geology)

   Vein (geology) White veins in dark rock at Imperia, Italy. In geology, a vein is a distinct sheetlike body of crystallized minerals within a rock. Veins form when mineral constituents carried by an aqueous solution within the rock mass are deposited through precipitation. The hydraulic flow involved is usually due to hydrothermal circulation. [1]

3. Orogenic gold deposit - Wikipedia

   en.wikipedia.org/wiki/Orogenic_gold_deposit

   Hydrothermal gold in quartz (white mineral) vein with other gangue minerals (black minerals). Geochemical studies on gold bearing quartz-carbonate veins are important to determine temperature, pressure, at which the veins were generated, and the chemical signature of fluids.

4. Georgia Gold Belt - Wikipedia

   en.wikipedia.org/wiki/Georgia_Gold_Belt

   Georgia Gold Belt showing, southwest to northeast, the Sixes, Franklin, Strickland, Kin Mori, Barlow, Wells, Findley, Loud, Smith, and Moore Gold mines. Gold-quartz veins are found in the schists and gneiss. [1]: 19, 27, 48 Gold veinlets (they appear white) in a sample of gneiss from the Battle Branch Mine in Lumpkin County

5. Mother lode - Wikipedia

   en.wikipedia.org/wiki/Mother_lode

   The zone contains hundreds of mines and prospects, including some of the best-known historic mines of the gold-rush era. Individual gold deposits within the Mother Lode are gold-bearing quartz veins up to 15 metres (49 ft) thick and a few thousand feet long. The California Mother Lode was one of the most productive gold-producing districts in ...

6. Temagami Greenstone Belt - Wikipedia

   en.wikipedia.org/wiki/Temagami_greenstone_belt

   Pyrite with chalcopyrite and gold occupies the quartz-rich zones as blebs and small veins. [ 15 ] Mining operations began at Leckie Mine , a now abandoned gold mine 3 km (1.9 mi) north of the Temagami, in the early 1900s with the construction of a 17 m (56 ft) mine shaft with 27.3 m (90 ft) of underground workings.

7. Ore genesis - Wikipedia

   en.wikipedia.org/wiki/Ore_genesis

   Ore genesis. High-grade gold ore from the Harvard Mine, Jamestown, California, a wide quartz -gold vein in California's Mother Lode. Specimen is 3.2 cm (1.3 in) wide. Various theories of ore genesis explain how the various types of mineral deposits form within Earth's crust. Ore-genesis theories vary depending on the mineral or commodity examined.