 A soft, white, and partially decomposed granite is a very frequent associate of the stronger lead-bearing veins, particularly in their more productive portions; but this material belongs, in all probability, not to the ancient granitic injections of the...  Original Researches in Mineralogy and Chemistry - 第 179 頁John Lawrence Smith 著 - 1884 - 630 頁完整檢視 - 關於此書
 | 1855 - 490 頁
...syenite composed of quartz, greenish semi-translucent feldspar, and a smaller proportion of dark green hornblende. A soft, white, and partially decomposed...injections of the gneiss, but to those much later metalliferons intrusions which filled long parallel rents in that formation with the lead ores and... | |
 | 1855 - 990 頁
...syenite composed of quartz, greenish semi-translucent feldspar, and a smaller proportion of dark green hornblende. A soft, white, and partially decomposed...injections of the gneiss, but to those much later metalliferons intrusions which filled long parallel rents in that formation with the lead ores and... | |
 | American Association for the Advancement of Science - 1856 - 384 頁
...syenite composed of quartz, greenish semi-translucent feldspar, and a smaller proportion of dark green hornblende. A soft, white, and partially decomposed...with the lead ores and their associated minerals. " The gneissic strata and their granitic injections throughout this district display a softened, partially... | |
 | 1853 - 690 頁
...variety of granitic dyke is a simple sienite composed of quartz, greenish, semi-translucent felspar, and a smaller proportion of dark-green hornblende....with the lead ores and their associated minerals. It appears to be, in fact, of the same date of origin with these metalliferous lodes, and may be viewed... | |
 | 1855 - 484 頁
...syenite composed of quartz, greenish semi-translucent feldspar, and a smaller proportion of dark green hornblende. A soft, white, and partially decomposed...injections of the gneiss, but to those much later metalliferons intrusions which filled long parallel rents in that formation with the lead ores and... | |
 | 1856 - 384 頁
...syenite composed of quartz, greenish semi-translucent feldspar, and a smaller proportion of dark green hornblende. A soft, white, and partially decomposed...with the lead ores and their associated minerals. trict display a softened, partially decomposed condition, extending in many places to a depth of twenty... | |
 | American Association for the Advancement of Science - 1856 - 414 頁
...syenite composed of quartz, greenish semi- translucent feldspar, and a smaller proportion of dark green hornblende. A soft, white, and partially decomposed...with the lead ores and their associated minerals. trict display a softened, partially decomposed condition, extending in many places to a depth of twenty... | |
 | American Association for the Advancement of Science - 1856 - 964 頁
...syenite composed of quartz, greenish semi-translucent feldspar, and a smaller proportion of dark green hornblende. A soft, white, and partially decomposed...with the lead ores and their associated minerals. " The gneissic strata and their granitic injections throughout this district display a softened, partially... | |
 | John Lawrence Smith - 1873 - 408 頁
...perhaps in a rather larger relative amount in the copper-bearing lodes of the red shale. "The gneissic strata of the tract embracing this group of lead-bearing...filled long parallel rents in that formation with the leadores and their associated minerals. " Of the dozen or more lead and copper lodes of greater or... | |
 | John Lawrence Smith - 1873 - 418 頁
...generally, consist for the most part of a coarse binary mixture of quartz and opaque white felflspar, tending easily to decomposition. This rock abounds...filled long parallel rents in that formation with the leadores and their associated minerals. "Of the dozen or more lead and copper lodes of greater or less... | |
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