Mississippi valley type, or mvt, deposits are a family of epigenetic deposits primarily forming in dolostone and limestone with lead and zinc as the primary commodities mvts, are named after the central mississippi valley in the united states where lead and zinc have been extracted for more than 100 years. Sedimentary-exhalative (sedex) and mississippi-valley type (mvt) pb-zn deposits this text is based largely on the review paper of leach et al (2005) additional literature is listed in the references definition the sedex and mvt deposits comprise a large group of ore deposits which formed by the action of hydrothermal fluids.
A4 the largest 30 mississippi valley-type deposits based on total lead and zinc content (mt) 49 a5 metal endowment of the 30 largest mississippi valley-type deposits in contained metal and the districts from table a250 a1–a2. Life cycles of mississippi valley-type (mvt) deposits a fundamental goal of the project was to understand the key genetic links between mississippi valley-type ( mvt ) mineralization — which accounts for 35 percent of the world's lead and zinc resources, respectively — and regional- and global-scale tectonic processes. Distribution of mississippi valley-type deposits and districts worldwide (from sangster, 1990) numbers on symbols are the deposit numbers of the world mineral deposits database individual ore bodies are generally 2 million tonnes, are zinc-dominant, and possess grades which rarely exceed.
Mississippi valley type mineral deposits why study mineral deposits history & economics mining was a vital part of early midwest economy: 1 lead mining began in the upper mississippi valley about 1820 2 mineral point was founded in 1827. Mississippi valley type the central plains of north america, running from the appalachian mountains on the east to the rocky mountains on the west, are underlain by nearly flat sedimentary rocks that were laid down on a now-covered basement of igneous and metamorphic rocks.
Represent several dozen individual deposits for example, the p ine point and upper mississippi valley districts contain more than 80 and nearly 400 deposits, respectively individual deposits are generally small most yield les s than ten million tons of ore.
Mississippi valley-type (mvt) deposits host a large percentage of the world’s economic zinc and lead resources and also often contain economic occurrences of silver and sometimes copper.
Cussion of tectonic controls of mississippi valley-type lead-zinc mineralization in orogenic forelands hy d c bradley and d l ledch mineraliiim deposita 39:512-14 lasmanis, r 1989 galena from mississippi valley-type deposits rocks & minerals 64:11-34 leacb, d l, and d f sangster 1993 mississippi valley-type lead-zinc deposits. Remarkable advances in age dating mississippi valley-type (mvt) lead-zinc deposits provide a new opportunity to understand how and where these deposits form in the earth's crust these dates are summarized and examined in a framework of global tectonics, paleogeography, fluid migration, and paleoclimate nineteen districts have been dated by paleomagnetic and/or radiometric methods.