Domestic distribution of limestone

Limestone is mainly formed in domestic neritic environment.Generated by the biochemical effect of Limestone, often contains rich organic debris.Usually contain a lot of dolomite limestone and clay minerals content, when the content of the clay minerals content of 25% ~ 25%, called the argillaceous rock.Dolomite content was 25% ~ 50%, called the dolomitic limestone.limeRock distribution is quite broad, lithologic uniform, easy mining and processing, is a kind of application is very widebuildingMaterials.

According to geologists in the domestic area survey, found that the shallow water area can dissolve a year there, eroded limestone surface about nails so thin layer.Although only corrosion every year so little, however, the development of the earth's history is very long.Take, for instance, recent - quaternary geological period about 3 million years.Even so slow dissolution rate, 3 million can also dissolution 900 meters!And only YiErBai meters high, and guilin butte, common maximum height of karst cave are only a few tens of meters.But also not have limestone can form the landform, but need to have a large area, big thickness, geological pure limestone, also requires a warm and humid climate conditions is likely to develop into such a perfect landscape, formed as the beautiful natural scenery.

Limestone is one of the most widely distributed mineral in the earth's crust.According to its sedimentary areas, limestone and divided into Marine sedimentation and continental deposit, in the majority with the former.According to its origin, limestone can be divided into biological deposition and chemical deposition and secondary three types;According to ore contained in the composition is different,limeCan be divided into siliceous rocklimeRock, clay,limeRock and dolomiticlimeThree kinds of rock.Resource distribution: ChinalimeRock is very rich in mineral resources, as solvent cement, and chemical industry with limestone ore deposit has reached more than eight hundred.All over the country of origin, provinces, municipalities autonomous regions near the industrial zone of local materials.

limeRock mineral in each geological era has deposit, the tectonic development stage has the distribution, but of good quality and large scalelimeDeposits are often occur in a certain horizon.For the cementlimeRock as an example, the northeast, north China region in the ordovician majiagou grouplimeRock is extremely important horizon, south China, east China, southwest multi-purpose carboniferous, Permian and TriassiclimeRock, northwest, general multi-purpose adakite in Tibet, devonian system Limestone, east China, northwest and the ordovician limestone of the middle and lower reaches of the Yangtze river is also the important horizon of cement raw material.

From：Limestone