Looked everywhere need help please.
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ANDESITE is a volcanic intermediate rock, DI|ORITE is a plutonic intermediate rock
The wikipedia page for andesite states, "The mineral assemblage is typically dominated by plagioclase plus pyroxene and/or hornblende."
The wikipedia page for diorite states, "..... composed principally of plagioclase feldspar (typically andesine), biotite, hornblende, and/or pyroxene. It may contain small amounts of quartz, microcline and olivine."
Therefore in regard to common ELEMENTS, one would expect to find, calcium, sodium, iron, magnesium and some small amounts of potassium together with significant amounts of silicon & oxygen.
Importantly, as intermediate rocks, they are not iron, magnesium and calcium dominant as is true of mafic rocks or potassium, sodium and silica dominant as is true of felsic rocks but intermediate between these two extremes.
Intermediate igneous rocks probably contain more or equal amounts of calcium as mafic rocks do but significantly less iron & magnesium. However intermediate rocks have significantly less sodium, potassium, silicon & oxygen than felsic rocks.
The wikipedia page for andesite states, "The mineral assemblage is typically dominated by plagioclase plus pyroxene and/or hornblende."
The wikipedia page for diorite states, "..... composed principally of plagioclase feldspar (typically andesine), biotite, hornblende, and/or pyroxene. It may contain small amounts of quartz, microcline and olivine."
Therefore in regard to common ELEMENTS, one would expect to find, calcium, sodium, iron, magnesium and some small amounts of potassium together with significant amounts of silicon & oxygen.
Importantly, as intermediate rocks, they are not iron, magnesium and calcium dominant as is true of mafic rocks or potassium, sodium and silica dominant as is true of felsic rocks but intermediate between these two extremes.
Intermediate igneous rocks probably contain more or equal amounts of calcium as mafic rocks do but significantly less iron & magnesium. However intermediate rocks have significantly less sodium, potassium, silicon & oxygen than felsic rocks.
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Igneous rocks are composed of the top "8" elements
http://hyperphysics.phy-astr.gsu.edu/hba… while intermediate igneous rocks are normally just the big "6": calcium sodium potassium aluminum silicates ( e.g. Silicon Oxygen). Those are they type minerals they contain which assumes that you know how to look up minerals to get their chemical composition.( See above: big 6-- hint hint) The intermediate igneous rocks(felsic) have no or a very largely depleted amount of Iron and Magnesium(mafic)
To familiarize your self with igneous rock types and therefore their chemistry:
http://en.wikipedia.org/wiki/Igneous_roc…
http://www.pitt.edu/~cejones/GeoImages/2…
http://csmres.jmu.edu/geollab/fichter/Ig…
http://csmres.jmu.edu/geollab/fichter/Ig…
http://hyperphysics.phy-astr.gsu.edu/hba…
only very very rarely do igneous rocks contain carbon or carbonates.
http://hyperphysics.phy-astr.gsu.edu/hba… while intermediate igneous rocks are normally just the big "6": calcium sodium potassium aluminum silicates ( e.g. Silicon Oxygen). Those are they type minerals they contain which assumes that you know how to look up minerals to get their chemical composition.( See above: big 6-- hint hint) The intermediate igneous rocks(felsic) have no or a very largely depleted amount of Iron and Magnesium(mafic)
To familiarize your self with igneous rock types and therefore their chemistry:
http://en.wikipedia.org/wiki/Igneous_roc…
http://www.pitt.edu/~cejones/GeoImages/2…
http://csmres.jmu.edu/geollab/fichter/Ig…
http://csmres.jmu.edu/geollab/fichter/Ig…
http://hyperphysics.phy-astr.gsu.edu/hba…
only very very rarely do igneous rocks contain carbon or carbonates.