In geology, mafic is a term used to describe certain types of igneous rocks and minerals. The term "mafic" is derived from the words "ma" for magnesium and "fic" for ferrum (Latin for iron). Mafic rocks are characterized by their high content of magnesium and iron, which gives them a dark color. These rocks are distinguished from felsic rocks, which have lower amounts of magnesium and iron and are lighter in color. Mafic rocks are typically dense and heavy, with a high density ranging from 2.8 to 3.
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This interpretation is supported by horizontal patterns in the 143 Nd 144 Nd Hf Nd diagram, indicating partial melting followed by magmatic differentiation Fig. Quenching textures in MMEs and MMEs representing fragments of ascent conduits support such conclusions, given that mafic-intermediate magma is the first to rise due to density contrast and lower viscosity and undercooling is expected to happen during ascent Rodríguez and Castro, 2019 , resulting in the observed quenching textures.
8 to 3.3 grams per cubic centimeter. Common mafic rocks include basalt and gabbro.
Mafic microgranular enclaves (MMEs) trace the origin of post-collisional magmas
Mafic microgranular enclaves (MMEs) are a ubiquitous feature of post-collisional magmatism, receiving much attention among earth scientists over the last decades. While recent advances point to the large-scale involvement of the lithospheric mantle in granite petrogenesis, MMEs have received less attention in such discussion. Because MMEs are commonly acknowledged to represent the mafic end member with a mantle affinity that is related to early-stage batholith petrogenesis, they constitute a good proxy for the mantle role in the process. Using MME data from Los Pedroches batholith in southwestern Iberia, we conduct a geochemical comparative study between MMEs and the mafic-intermediate (sanukitoid) suite of post-collisional batholiths. An accurate overlap between the two groups is revealed, implying a potential genetic link between MMEs and the sanukitoid suite. Together with evidence from experimental cotectic liquids, the link between the high-Mg signature of postcollisional magmas and the predominance of amphibole in the studied MME samples is used to account for the composition of post-collisional magmatism. Implications for post-collisional batholith petrogenesis is then discussed in a qualitative manner, suggesting a heterogeneous yet common two-stage origin for all post-collisional magmatism in which the relationship between MMEs, sanukitoid, and the host felsic magmas is a differentiation process, thus representing a major input of juvenile magma into the crust.
Basalt is an extrusive rock that forms from the rapid cooling of lava on the Earth's surface. It is commonly found in volcanic regions and has a dark gray to black color. Gabbro, on the other hand, is an intrusive rock that forms from the slow cooling of magma beneath the Earth's surface. It is coarse-grained and has a dark green to black color. Mafic minerals are also commonly found in these rocks. Some examples of mafic minerals include olivine, pyroxene, and amphibole. These minerals are rich in magnesium and iron and have a high melting point. Mafic rocks have several important uses and applications. Basalt, for example, is commonly used as a construction material, as it is durable and resistant to weathering. It is also used in the production of asphalt and concrete. Gabbro, on the other hand, is often used as a decorative stone in buildings and monuments. Overall, mafic rocks and minerals play an important role in understanding the Earth's geology and have various practical applications in daily life..
Reviews for "The Art of Escapology: How Magicians Defy the Laws of Physics to Escape Impossible Situations"
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