. Transactions. FiG. 13. Fig. 14. Fig. 13.—Shattered Quartz Vein, Lola Mine. Fig. 14.—Very Acidic Quartz Diorite, consisting of Quartz, the most abundant Mineral in Clear, White, Light or Dark Gray Areas; Micropeg- MATiTE, the Mottled Areas; ant) Epidote, the Dark Shreds. Magdalena Fig. 15. Fig. 16. Fig. 15.—Micro-pegmatite from a Dike in the East Mine, Firmeza. Fig. 16.—Acidic Dike, West Mine, Firmeza. Acid plagioclase with micro-pegmatitic quartz on the right. Fine-grained diorite, forming the wall rock on the left. gregate, reminding one of nothing so much as somewhat badly alteredtr
. Transactions. FiG. 13. Fig. 14. Fig. 13.—Shattered Quartz Vein, Lola Mine. Fig. 14.—Very Acidic Quartz Diorite, consisting of Quartz, the most abundant Mineral in Clear, White, Light or Dark Gray Areas; Micropeg- MATiTE, the Mottled Areas; ant) Epidote, the Dark Shreds. Magdalena Fig. 15. Fig. 16. Fig. 15.—Micro-pegmatite from a Dike in the East Mine, Firmeza. Fig. 16.—Acidic Dike, West Mine, Firmeza. Acid plagioclase with micro-pegmatitic quartz on the right. Fine-grained diorite, forming the wall rock on the left. gregate, reminding one of nothing so much as somewhat badly alteredtrachytes or bostonite dikes. Blotches of less definite igneous texturesappear as well and make the rock very puzzling for sharp the original diorite has been severely affected by thermal JAMES F. KEMP 19 waters, has lost its dark silicates and has changed over to this feldspathicresidue. In the New El Norte mine of the Daiquiri group a light-coloredporphyritic dike with branches penetrates the ore in Cut 3 as illustrated
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Keywords: ., bo, bookcentury1800, bookdecade1870, booksubjectmineralindustries
