Mineral vein

{
  "id": "MLC-T-ENV-017386",
  "term": "Mineral vein",
  "field": "Environment",
  "term_source": "Mineral Vein",
  "definition": "1. A mineral-filled fracture or fault in a rock.\n\n2. Tabular rock or mineral filling of a generally small crack such as a quartz vein. A product of chemical precipitation from a watery solution, in contrast to a dike crystallized from magma, although gradations exist.\n\n3. A zone or belt of mineralized rock lying within boundaries clearly separating it from neighboring rock. It includes all deposits of mineral matter found through a mineralized zone or belt coming from the same source, impressed with the same forms and appearing to have been created by the same processes. A mineralized zone having a more or less regular development in length, width, and depth to give it a tabular form and commonly inclined at a considerable angle to the horizontal. The term lode is commonly used synonymously for vein.\n\n4. A well-defined, tabular, mineralized zone which may or may not have valuable ore bodies.",
  "subject": "Natural environments",
  "references": [
    "USGS Geology in the Parks Glossary",
    "IRS Coal Excise Tax - Appendix I, Glossary of Mining Terms",
    "IRS Placer Mining Industry Training 3147-121 (7-99) TPDS No. 83436E at http://www.irs.gov/pub/irs-mssp/placer.pdf"
  ],
  "url": "https://mlchart.com/terminology/environment/mineral-vein/"
}