 | Thomas Chrowder Chamberlin - 1900 - 1088 Seiten
...sulphides in many cases appears to commence at or near the groundwater-level, it does not appear to bave a necessary connection with that level, and may under...below that level for a distance as yet undetermined, the most important favoring conditions appearing to be recent or postmineral fractures, which have... | |
 | František Pošepný, Rossiter Worthington Raymond - 1902 - 842 Seiten
...this re-deposition of sulphides in many cases appears to commence at or near the groundwater-level, it does not appear to have a necessary connection...below that level for a distance as yet undetermined, the most important favoring conditions appearing to be recent or post-mineral fractures, which have... | |
 | František Pošepný - 1902 - 844 Seiten
...this re-deposition of sulphides in many cases appears to commence at or near the groundwater-level, it does not appear to have a necessary connection with that level, and may under fa\rorable conditions extend below that level for a distance as yet undetermined, the most important... | |
 | John Mason Boutwell - 1905 - 522 Seiten
...' ' while this redeposition in many cases appears to commence at or near the ground-water level.it does not appear to have a necessary connection with...ore may reach considerably below the lower limit of ground water (vadose circulation) and even well within the zone of deep underground water or zone of... | |
 | Geological Survey (U.S.) - 1905 - 522 Seiten
...deposits: Genesis o( Ore Deposits, Am. Inst. Min. Kng., 1902, p. 18; discussion, p. 228. 6 Penrose, RAF, Jr., Jour. Geol., 1894, p. 296. tion may extend. Sulphide...ore may reach considerably below the lower limit of ground water (vadose circulation) and even well within the zone of deep underground water or zone of... | |
 | Thomas Chrowder Chamberlin - 1900 - 828 Seiten
...this redisposition of sulphides in many cases appears to commence at or near the groundwater-level, it does not appear to have a necessary connection...below that level for a distance as yet undetermined, the most important favoring conditions appearing to be recent or postmineral fractures, which have... | |
| |
Penrose, RAF, Jr., Jour. Geol., 1894, p. 296. tion may extend. Sulphide enrichment is of this character, for ' ' while this redeposition in many cases appears to commence at or near the ground-water level, it does not appear to have a necessary connection... 