The most common ore deposits that can be formed in basaltic igneous rocks include:
1. Nickel and Copper: Sulfide deposits containing nickel and copper can form in basaltic environments, particularly in association with ultramafic and mafic intrusions.
2. Platinum Group Elements (PGE): Basaltic rocks, especially those with mafic and ultramafic compositions, can host platinum group elements. These are often found in layered mafic intrusions.
3. Titanium and Vanadium: Basaltic rocks can contain ilmenite and magnetite, which are ores of titanium and vanadium, respectively. These minerals can concentrate in significant quantities.
4. Iron: Magnetite, an iron ore, is commonly found in basaltic rocks and can form substantial deposits in large igneous provinces like the Deccan Traps and the Paraná Basin.
5. Chromium: Chromite deposits are often associated with ultramafic rocks but can also occur in mafic basaltic environments.
Copper Deposits: Basalt-hosted copper deposits often form through hydrothermal alteration of the basaltic rocks. Copper minerals such as chalcopyrite, bornite, and chalcocite can precipitate from the hydrothermal fluids
Mainly basaltic magma contain high amount of Mg,Fe,Mn.So mainly with this kind of ultramafic to mafic rocks, Magnetite,Magnesite deposits are common.As well as High Cr percentage can be found with this kind of magma.So some chromite deposits also ususally occure with ultramafic rocks.As well as these magma generat in the Earth mantle it contain considerable amount of PGE, Copper and Ni.
Dear Gholamreza: your question was very specific, but most of the above answers are not correct. One thing is basaltic rocks, usually in pillowed lava flows, another thing are the plutonic stratiform mafic-ultramafic complexes formed by crystallization and fracctioning of basaltic magma. Therefore, the correct answer is: associated with submarine basaltic flows are found "Cyprus" type Cu-Fe volcanogenic massive sulfides, VMS, formed by hydrothermal circulation below the sea floor, which discharges as the now famous "black smokers".
Also, in some continental environments, such as basaltic plateaus, type case the Neoproterozoic Keewenawan Basalts in the Great Lakes region in northern U.S.A., contained huge amygdules filled with big masses of native copper, and sometimes some silver too. But most other basalt plateus (Deccan, Paraná, Ethiopian) are quite sterile, and only contain zeolites, and related minerals (prehnite, epidote, apophyllite), which make beautiful collection specimens, such as those at Poona, near Mumbay, in western India, but no mineable ore. Associated with the huge Siberian Trapps, there are some plutonic stratiform complexes, such as Norils'k, which do contain rich Ni-Fe-Cu sulfides with PGE, but these are not basalts, they are gabbroic to ultramafic rocks formed by crystal settling in a basaltic magma chamber. The proper basalts of the Trapps is also quite sterile.
Regards, Sebastián.
Basalt is a very common dark-colored volcanic rock composed of calcic plagioclase (usually labradorite), clinopyroxene (augite) and also iron ore (titaniferous magnetite). Basalt may also contain olivine, quartz, hornblende, nepheline, orthopyroxene, etc. Basalt is a volcanic equivalent of gabbro.
In terms of Deccan Basalt volcanic province India are excellant host of Bauxite deposit , apart these Black soil play a vital role in fertility for agriculture production of that area .
Dear Swastik Deshmuk: indeed I forgot to mention the lateritic bauxite deposits associated with the Deccan Trapps, I focused mostly in endogenic deposits, mainly hydrothermal or vulcanogenic, but sure, bauxites are abundant in the soil covering the Deccan basalts. Regards, Sebastián.
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