Magmatism is the emplacement of magma within and at the surface of the outer layers of a terrestrial planet, where it solidifies as igneous rocks. It covers the whole chain from the production of magma, through its intrusion into the crust, to its extrusion as lava, with volcanism as its surface expression. On Earth magma forms by partial melting of silicate rocks in the mantle or in the continental or oceanic crust, and its character depends on the tectonic setting: mostly calc-alkaline magmatism along arcs above subduction zones, basaltic magmatism at mid-ocean ridges and hotspots, and bimodal magmatism in continental rifts. Magmatism is one of the main processes responsible for mountain building, and the igneous rocks it leaves behind are the usual evidence that it took place.
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Driving Force (category) Connections
Associated With
Source Magmatism (Wikipedia)
Source Magmatism (Wikipedia)
Source Magmatism (Wikipedia)
Causes
Source Apatite (Wikipedia)
Source Corundum (Wikipedia)
Source Feldspar (Wikipedia)
Source Forsterite (Wikipedia)
Source Olivine (Wikipedia)
Source Orthoclase (Wikipedia)
Source Pyrite (Wikipedia)
Source Quartz (Wikipedia)
Source Spinel (Wikipedia)
In Discipline
Source Magmatism (Wikipedia)
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Sources
1. Magmatism (Wikipedia)
Lead
The nature of magmatism depends on the tectonic setting.
Associated With: Mid-ocean ridge, Lead, mid-ocean ridges
basaltic magmatism is found at mid-ocean ridges during sea-floor spreading at divergent plate boundaries
Associated With: Seamount, Hotspots
This type of magmatism forms volcanic seamounts or oceanic islands when they become emergent.
View the SourceApatite (Wikipedia)
Wikimedia FoundationCauses: Apatite, GeologyQuote, Causes: Apatite, Geology
Apatite is very common as an accessory mineral in igneous and metamorphic rocks, where it is the most common phosphate mineral.
Corundum (Wikipedia)
Wikimedia FoundationCauses: Corundum, Geology and occurrenceQuote, Causes: Corundum, Geology and occurrence
It also occurs in low-silica igneous syenite and nepheline syenite intrusives.
Feldspar (Wikipedia)
Wikimedia FoundationCauses: Feldspar, LeadQuote, Causes: Feldspar, Lead
Feldspars crystallize from magma as both intrusive and extrusive igneous rocks and are also present in many types of metamorphic rock.
Forsterite (Wikipedia)
Causes: Forsterite, Geologic occurrenceQuote, Causes: Forsterite, Geologic occurrence
Forsterite-rich olivine is a common crystallization product of mantle-derived magma.
Olivine (Wikipedia)
Wikimedia FoundationCauses: Olivine, Identification and paragenesisQuote, Causes: Olivine, Identification and paragenesis
Mg-rich olivine crystallizes from magma that is rich in magnesium and low in silica.
Orthoclase (Wikipedia)
Causes: Orthoclase, Formation and subtypesQuote, Causes: Orthoclase, Formation and subtypes
Orthoclase is a common constituent of most granites and other felsic igneous rocks and often forms huge crystals and masses in pegmatite.
Pyrite (Wikipedia)
Causes: Pyrite, OccurrenceQuote, Causes: Pyrite, Occurrence
It is a common accessory mineral in igneous rocks, where it also occasionally occurs as larger masses arising from an immiscible sulfide phase in the original magma.
Quartz (Wikipedia)
Wikimedia FoundationCauses: Quartz, OccurrenceQuote, Causes: Quartz, Occurrence
While the majority of quartz crystallizes from molten magma, quartz also chemically precipitates from hot hydrothermal veins as gangue, sometimes with ore minerals such as gold, silver and copper.
Spinel (Wikipedia)
Causes: Spinel, Geologic occurrenceQuote, Causes: Spinel, Geologic occurrence
It also occurs as a primary mineral in rare mafic igneous rocks
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