contact metamorphism iron ore

GM stone crusher machine is designed to achieve maximum productivity and high reduction ratio. From large primary jaw crusher and impact crusher to cone crusher and VSI series for secondary or tertiary stone crushing, GM can supply the right crusher as well as complete crushing plant to meet your material reduction requirements.

Metamorphism of cupriferous iron sulfide …

Thermal metamorphism of cupriferous iron sulfide deposits occurring in mafic volcanic rocks in the Notre Dame Bay area of Newfoundland results in conspicuous changes in ore and gangue mineral assemblages. Formerly chloritic and sericitic host rocks are represented in the hornblende-hornfels facies by cordierite + or - anthophyllite + or - biotite + or - andalusite rocks. Pyritic ores in the ...

Get Price

The Effects of contact metamorphism on the …

The different ways in which these rock types respond to the contact metamorphism plays an important role in ore control at the deposit. The strongly calc-silicate altered rocks are poor hosts for Carlin-type gold deposition. The ore fluids which were moderately acidic, pH 3-4, required carbonates to generate porosity and permeability, as well as to liberate iron for the ore fluids to sulfidize ...

Get Price

Regional Metamorphism Of Iron Ore And Line

Contact; Home > Regional Metamorphism Of Iron Ore And Line; Regional Metamorphism Of Iron Ore And Line. 2019-10-23in the bergslagen ore province, where base metal mineralisations and iron oxide ores predominate 23,24,25,26,27, the ree-line represents both a. Interaction Between Hightemperature Magmatic . 2019-10-23in the bergslagen ore province, where base metal mineralisations and iron …

Get Price

Metamorphic and Metamorphogenic Ore …

This difference in emphasis may perhaps be referred to the differentviews held regarding the initial genesis of the ores in the two regions.The late 1940s and the 1950s witnessed a considerable revision of ideas on ore genesis, especially regardingstrata-bound massive sulfide ores. A parallel revival of interest in the role of metamorphism,probably not unrelated to the foregoing, began in the ...

Get Price

Geology Lab: Metamorphic Rocks Flashcards | …

The most common sulfide ore minerals associated with contact metamorphism are copper minerals such as chalcopyrite and bornite; galena (lead); pyrite (iron); and sphalerite (zinc). Two common iron oxide minerals that form as a result of contact metamorphism are hematite and magnetite. Tin and tungsten are also important ores associated with contact metamorphism. Sulfur is a mining by …

Get Price

Origin of High-Grade Iron Ores at the …

The Thabazimbi iron ore deposit comprises a series of stratabound orebodies, on average 18 – 25 m thick that are aligned along the faulted basal contact between the Penge Iron Formation and dolostones of the Malmani Subgroup, Transvaal Supergroup. Field geological relationships and petrographic observations suggest that the formation of high-grade iron ores took place...

Get Price

The Iron Formations of Southern Africa | …

Clout JMF, Simonson BM (2005) Precambrian iron formations and iron formation-hosted iron ore deposits. Economic Geology 100th Anniversary Volume, pp 643–679 Google Scholar Cornell DH, Schütte SS, Eglington BL (1996) The Ongeluk basaltic andesite formation in Griqualand West, South Africa: Submarine alteration in a 2222 Ma proterozoic sea.

Get Price

"The Effects of contact metamorphism on the …

The different ways in which these rock types respond to the contact metamorphism plays an important role in ore control at the deposit. The strongly calc-silicate altered rocks are poor hosts for Carlin-type gold deposition. The ore fluids which were moderately acidic, pH 3-4, required carbonates to generate porosity and permeability, as well as to liberate iron for the ore fluids to sulfidize ...

Get Price

Genetic Model of Ore Deposits ~ Mining Geology

18.05.2015· Skarns are calcium-bearing silicate rocks of any age, can form during regional or contact metamorphism and from a variety of metasomatic processes involving fluids of magmatic, metamorphic, meteoric, and/or marine origin. They are found adjacent to plutons, along faults and major shear zones, in shallow geothermal systems, on the bottom of the seafloor, and at lower crustal depths in deeply ...

Get Price

Metamorphic Rocks - Gold Ore Crusher

Killas – Wikipedia Shortly after the deposition of the sediments, the Variscan orogeny caused the intrusion of the Cornish granites and the subsequent contact metamorphism created the metamorphic rocks seen… Continue Reading. is iron ore metamorphic

Get Price

Upgrading iron-ore deposits by melt loss during …

Upgrading iron-ore deposits by melt loss during granulite facies metamorphism. ... and subordinate chlorite, occur in contact with magnetite porphyroblasts. Small euhedral garnet grains (up to 100 μm) occur throughout the sample, but are more common in the pelitic horizons. The Fe-oxide-rich layers contain abundant magnetite and hematite (up to ~ 40 vol.% of the layer), small anhedral quartz ...

Get Price

Economic geology - Metamorphic ore deposits

Contact metamorphism of ore in the heated zone around magmatic bodies is usually static (i.e., in the absence of dynamic deformation). Exposure to high temperatures (with a maximum of 750°C) affects fabric, mineralogy and mineral chemistry (e.g. by driving off water and other volatiles). Fabric changes are confined to a general increase in grain size with rising temperature. Monomineralic ...

Get Price

Progressive contact metamorphism of the …

Progressive contact metamorphism of Biwabik iron formation on Mesabi Range, Minnesota

Get Price

Chapter 2 Origin and Timing of Banded Iron Formation ...

hosted by banded iron formation (BIF) are known for all the continents, excluding Antarctica. These deposits are the products of the enrichment of Precambrian BIFs, and they are one of the most important sources of iron ore today (U.S. Geological Survey, 2007). Many high-grade hematite ore-bodies consist of "soft" martite-hematite ore, which is gener-ally accepted as having formed through ...

Get Price

Contact Metamorphism by a Tertiary Dyke at Waterfoot, Co ...

Contact Metamorphism by a Tertiary Dyke 461 Contact Metamorphism by a Tertiary Dyke at Waterfoot, Co. Antrim By DORI LS. REYNOLD (UniversitS y of Durham) OSE to Waterfoot and about one and a quarter miles south of Cushendall, in Co. Antrim, a bifurcating dolerite dyke of Tertiary age outcrops on the shore approximately 750 feet south-west of Red Bay pier (see text-fig. 1). The dyke is …

Get Price

When do ores form in the process of contact …

Sulphuric acid is manufactured by CONTACT PROCESS which is a three step process. These are: Burning of sulphur or sulphide ores in air to generate SO2. Conversion of SO2 into SO3 by catalytic ...

Get Price

The Chinese Iron Ore Deposits and Ore Production

Among more than 2000 iron ore deposits identified, the contact metasomatic-hydrothermal iron deposits account for 39% of the total iron ore deposits, followed by sedimentary metamorphism (28%) and sedimentary (20%), weathered leaching (7%), volcanic (3%) and magmatic (3%) iron

Get Price

The Petrogenesis of Rocks and Minerals - Max …

For this reason local metamorphism is also called contact metamorphism. Different types of metamorphism may alternately be categorized according to the agents which are active during each process. Stress, pressure, and shock are causative agents of dynamic metamorphism, while thermal metamorphism is due merely to the influx of heat from a nearby igneous intrusion.

Get Price

Regional Studies and Specific Deposits, …

Regional Studies and Specific Deposits deals with regional studies of strata-bound and stratiform ore deposits. Topics covered include the geological association between coal and metallic ores; the genesis of iron ores in banded iron-formation (BIF) by supergene and supergene-metamorphic processes; mineral zoning in sediment-hosted copper deposits; and the formation of gossans.

Get Price

Iron ore formation and neotectonic evolution in …

Crustal extension in an orogenic wedge, surface-near plutonism, associated contact metamorphism and iron ore formation interacted within a period of time ~ 1 Ma long. Restoration of extensional structures revealed that contact metamorphism and iron ore formation occurred in the roof of two plutons located below western and eastern Elba (recent geographic frame). Some of the iron ore …

Get Price

Ores formed by metamorphism | SpringerLink

Ores formed by metamorphism. Authors; Authors and affiliations; Richard Edwards ; Keith Atkinson; Chapter. 510 Downloads; Abstract. The processes of metamorphism give rise to some of the World's major deposits of tungsten and some important copper occurrences. These processes may also result in important high-grade sources of molybdenum, lead, tin, iron and zinc as well as by-product base ...

Get Price

Ores Due To Contact Metamorphism - …

Ores Due To Contact Metamorphism. When the country rock, which is invaded by a plutonic mass, is of a kind that permits extensive penetration by the magmatic vapours and gases, metamorphism may result for a considerable distance from the intruding igneous rocks. Among the new minerals which are generated along the contact zone, metallic ores may occur in sufficient quantity to be economically ...

Get Price

Different Types of Iron Ore - Mineral Processing …

Jaspilite, iron formation with the quartz layers colored red (jasper) and the rock crystalline, due to metamorphism. Ferruginous chert ... Contact metamorphic deposits of magnetite are to be looked for at the contacts of igneous rocks of the intermediate kind (diorite, etc.), or the basic kind (diabase, etc.), with crystalline, limestone, dolomite, or limey shale. The ore bodies are usually ...

Get Price

Hematite Metamorphic Rock - meinusedom.eu

Metamorphic rocks form when a preexisting rock (protolith) is transformed into a different rock due to pressure, heat, or chemical alteration. Tectonics and burial can supply pressure and heat on a wide scale (regional metamorphism), while igneous intrusions can bake adjacent rocks (contact metamorphism). Hydrothermal fluids power chemical ...

Get Price