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  • Sodium-rich volcanic rocks and their relationships with

    01/03/2020· The geochronology, petrography, and geochemistry of minerals and sodium-rich rocks as well as the relationship between these rocks and the iron deposits are studied. Geochemically, the ore-hosting volcanic rocks are sodium-rich (the averages of Na 2 O and Na 2 O/K 2 O are 4.31 wt.% and 8.56, respectively) and belong to the calc-alkaline series. They are enriched in LREEs and LILEs (Ba,

  • Magma May Help Geologists Find New Iron Ore Deposits

    28/08/2018· The article explains that while most iron ore deposits are found in sedimentary rocks, others are mined in volcanic complexes such as El Laco in Chile and Kiruna in Sweden. These iron ore deposits, called Kiruna-type deposits, account for about 10% of the global production of iron. The researchers have discovered that these iron ore deposits are formed when magma splits into two

  • Descriptive Model of Volcanic-Hosted Magnetite

    APPROXIMATE SYNONYM Porphyrite iron, Kiruna OF VOLCANIC-HOSTED MAGNETITE Dennis P. Cox iron. DESCRIPTION Massive concordant and discordant magnetite ore bodies in intermediate to alkalic volcanic rocks with actinolite or diopside alteration. GEOLOGICAL ENVIRONMENT Rock Types Andesitic to trachytic flows and subvolcanic intrusions, also at Kiruna, quartz

  • Geological characteristics and metallogenesis of iron

    01/03/2014· Volcanic rocks of the Dahalajunshan Formation are the host to all iron orebodies at Zhibo, and include the basalt, basaltic andesite, andesite, tuff, minor rhyolite, and volcaniclastics ( Fig. 8 ). The volcanic strata and iron orebodies are widely covered by Quaternary alluvial deposits and glaciers.

  • Formation of massive iron deposits linked to explosive

    05/10/2018· Metallogenesis of the Zhibo and Chagangnuoer volcanic iron oxide deposits in the Awulale Iron Metallogenic Belt, Western Tianshan orogen, China.

  • Volcanic Environments & Their Mineral & Ore Deposits

    27/06/2012· Overview of Ores & Minerals Found in Volcanic Environments. A mineral is a solid material, which occurs naturally on Earth, with definitive boundaries around chemical and physical properties. An ore is a type of that rock that contains minerals (usually metals) that are of economic value. Ores are extracted through mining and are then refined to take out the valuable element or elements. It must be

  • Volcanogenic massive sulfide ore deposit Wikipedia

    Volcanogenic massive sulfide ore deposits, also known as VMS ore deposits, are a type of metal sulfide ore deposit, mainly copper-zinc which are associated with and created by volcanic-associated hydrothermal events in submarine environments. These deposits are also sometimes called volcanic-hosted massive sulfide deposits. The density generally is 4500 kg/m3. They are predominantly

  • Igneous rocks and iron ores of Kiirunavaara, Luossavaara

    Painirova and Mertainen iron ores; two deposits of the Kiruna iron ore type in northern Sweden

  • Searching for the volcanic origins of iron ore

    09/08/2018· Most iron ore comes from sedimentary deposits. However, a sizeable minority is mined from volcanic rocks, including those found along the Coastal Cordillera of northern Chile, and in Kiruna, Sweden.

  • Mineralogy, geochemistry, and genesis of the volcanic

    23/02/2018· Preliminary investigations in the studied area showed that the iron ore has been formed as replacements and mostly open space fillings along a fault zone cutting the altered volcanic rocks of Eocene age. The identified ore minerals within hand specimens are mainly Fe oxides, hydroxides, and sulfide. No comprehensive studies have been conducted on different geologic aspects of the Somea iron ore

  • Iron Ore: Sedimentary Rock Pictures, Definition & More

    What is Iron Ore? Earth's most important iron ore deposits are found in sedimentary rocks. They formed from chemical reactions that combined iron and oxygen in marine and fresh waters. The two most important minerals in these deposits are iron oxides: hematite (Fe 2 O 3) and magnetite (Fe 3 O 4). These iron ores have been mined to produce almost every iron and steel object that we use today

  • Geological characteristics and metallogenesis of iron

    01/03/2014· Volcanic rocks of the Dahalajunshan Formation are the host to all iron orebodies at Zhibo, and include the basalt, basaltic andesite, andesite, tuff, minor rhyolite, and volcaniclastics ( Fig. 8 ). The volcanic strata and iron orebodies are widely covered by Quaternary alluvial deposits and glaciers.

  • Volcanic Rock Minecraft Blocks Tynker

    Minecraft Block for Minecraft Java Edition by mark Volcanic Rock was remixed from Iron Ore.

  • Volcanic Environments & Their Mineral & Ore Deposits

    27/06/2012· Overview of Ores & Minerals Found in Volcanic Environments. A mineral is a solid material, which occurs naturally on Earth, with definitive boundaries around chemical and physical properties. An ore is a type of that rock that contains minerals (usually metals) that are of economic value. Ores are extracted through mining and are then refined to take out the valuable element or elements. It must be

  • Petrogenesis of the Chagangnuoer deposit, NW China: a

    volcanic rock-hosted skarn iron deposit, where orebodies mainly occur in andesitic rocks of the Dahalajunshan Forma-tion (DF) with skarns well developed around orebodies. The volcanic rocks of the DF in the Chagangnuoer deposit display calc-alkaline characteristics. The ore-bearing andesitic rocks havehigh 87Sr/86Sr (i) (0.7058–0.7117)andlow e

  • (PDF) Petrology and geochemistry of early Cambrian

    These rocks are important for hosting the REE-bearing apatite-iron oxide ores. The rhyolitic tuffs with a likely common origin are associated with the volcanic rocks. In this research, a selection...

  • Magmatic origin of giant ‘Kiruna-type’ apatite-iron-oxide

    10/04/2013· The iron-oxide ores and the moderately altered host rocks share similar REE concentrations and patterns with the regional bedrock and recent subduction zone volcanic rocks.

  • Types of volcanic rock — Science Learning Hub

    When it comes out of the volcano, it is hot and liquid. It contains very little silica (less than 50%) and a lot of magnesium and iron, which makes the rock look dark. The Auckland volcanic field has erupted this type of hot, runny iron-rich lava, and the landscape is dotted with mountains made from basalt and scoria (a red-coloured rock that contains large amounts of iron-rich minerals). Both rock types are excavated