The place where minerals with industrial value are generally produced is called a deposit. In geology deposit, deposit means comprehensive geological bodies in the current technical and economic exploitation conditions can be metal or other useful substances contained in the geological formation. On the one hand, this definition indicates that the deposit is a geological effect product, its formation and its characteristics are determined by the geological environment in which it is located; on the other hand, it also indicates whether it can be used as a deposit, and it is related to economic and technical conditions. It is technically feasible and economically profitable. The geological bodies enriched by metals or other useful substances in the deposit are called ore bodies, and the rocks around the ore bodies are called surrounding rocks. There are some natural boundaries between the ore body and the surrounding rock. For example, the vein is bounded by the fracture wall; some have no clear boundary. For example, the metal mineral is dispersed in the rock, and the boundary is determined by systematic sampling analysis. A metal deposit has a few to dozens or more ore bodies in most cases, but usually has 1 or 2 main ore bodies. The reserves of the main ore body generally account for more than 50% of the total deposit. The shape of the ore body is various, simple such as vein, layer, plate, complex such as complex veins, net veins, irregular shape, and the like. According to the characteristics produced on the spatial triaxial coordinates, the ore body can be divided into two groups, such as layered and veined ore, which extend significantly in one direction, such as columnar and cylindrical ore. Or developed in three major directions, such as cystic ore. The genesis of the deposit is diverse, and people's understanding of the genesis of the deposit is also constantly improving. The earliest thought that the deposit was a result of water, and then the realization of "fire", the "water theory" and "fire theory" long debate. By the beginning of the 20th century, according to the ore body and surrounding rock, structure and other aspects The relationship between the syngenetic deposit and the post-production deposit is also proposed. The syngenetic deposit refers to the formation of the deposit and the surrounding rock in the same geological process, at the same time or substantially simultaneously, such as the formation of magma deposits during the magma. Sedimentary deposits are deposited The diagenetic period is formed. The epigenetic deposit refers to the deposit that forms the time surrounding the surrounding rock. For example, the metal vein is formed by the inclusion of minerals in the surrounding rock and the formation of rupture cracks. Many metal deposits, ores around the ore body Rocks often change in the composition of a certain composition, structure and color, causing changes in the appearance of the rock. Such rocks are called altered surrounding rocks and are important for identifying the genesis of the deposit and finding the ore body. After the middle of the 20th century, with the study In-depth, found that the formation of some important deposits, is the product of the "fire" and "water into" geological interactions, both with the same ore-forming characteristics, but also with post-generation Automotive Scr System Assembly
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Introduction to the basic concept of the deposit
Mineral resources are an important material basis for the survival and development of human society. Humans have long exploited natural mineral resources. Early Stone Age to society, is bronze age, iron age is divided, it reflects the decisive role of mineral resources for social development of productive forces.