Classification of Stratigraphic Types Related to Mineralization and Ore-Controlling in Shaanxi Province

Based on the research and compilation results of the "Shaanxi Volume of China Mineral Geology", this article divides the strata related to mineralization into three types: ore bearing strata, host strata, and source strata. Different types of strata have different control effects on mineralization. Research suggests that the ore bearing strata mainly control marine/terrestrial sedimentary, biochemical sedimentary, and layer controlled hydrothermal deposits, as well as sedimentary metamorphic deposits. Ore bodies often occur in certain layers of the ore bearing strata and are controlled by certain types of geological formations; The host strata mainly control or affect the formation and distribution of epigenetic deposits such as magmatic hydrothermal type, tectonic hydrothermal type, porphyry type, and contact metasomatic type. Among them, mercury antimony ore has obvious selectivity for the construction type of ore bearing strata; The ore source strata mainly provide mineral sources for oil and gas fields and certain types of gold, silver, uranium and other deposits. In addition, a few strata have multiple attributes including ore bearing strata, host strata, or source strata. This type of formation contains abundant energy minerals such as coal, oil and gas, as well as precious metal minerals such as gold and silver, and is an important stratigraphic unit related to mineralization in Shaanxi. This paper enriches the research on stratigraphic division and the relationship between stratigraphy and mineralization, and provides new ideas and basis for the exploration of related stratigraphic distribution areas in the new era.