大理石的质量鉴别(国外英文资料).doc

大理石的质量鉴别(国外英文资料) Quality identification of marble??? October 12, 2006 Metamorphic rocks formed by regional metamorphism or contact metamorphism of carbonate rocks are called marbles, also known as marble (marble). Marble is mainly composed of calcite and dolomite, sometimes containing wollastonite, talc, tremolite, diopside and plagioclase, quartz, periclase, changing crystal structure and block structure with granular. Different types of marble can be formed because of different primary rocks. Such as pure calcium magnesium carbonate after metamorphic marble and dolomite marble calcite formation; metamorphic siliceous limestone after quartz marble, wollastonite marble formation; carbonaceous limestone can be formed by metamorphic graphite marble etc.. It can be further divided into white marble, grey marble, pink marble, fine marble, coarse marble and banded marble according to the structure, structure and color. Usually marble is mostly white and gray. The uniform texture, fine white marble, who said. It is generally believed that marble can be formed under different temperature and pressure conditions, such as tremolite marble formed in low and moderate temperature, and limestone and forsterite marble formed in middle and high temperature metamorphic conditions. Marble is widely distributed in China, Shandong, Yunnan, Beijing, Fangshan and other places are producing marble. Many nonferrous metals, rare metals, precious metals and non-metallic minerals are related to marble in origin. It is also a fine building material and art handicraft material. Marble hardness is small, belong to medium hardness stone, easy to mining processing. When the plate is polished, the decorative pattern or color texture is displayed, which is very beautiful and can be used as decoration material for indoor and outdoor. Waste in mining and processing, high-quality aggregate made crafts or for the production of terrazzo, etc. by crushing granitic plaster, a highly dense and homogeneous