is diorite mafic or felsic

It has 54 questions. Hopefully have provided all the materials you will need for the assignment. Conversely, igneous rocks rich in iron and magnesium-bearing minerals (such as amphibole and pyroxene) are darker and are classified as MAFIC, or basic. I hope it opens up the right the first time. A. pumice B. basalt C. granite D. scoria 9. The term combines the words "feldspar" and "silica." Andesite is a type name that applies to igneous rocks having an intermediary composition (sort of a mix of the two, or the transition from mafic to felsic). Intermediate magmas are somewhat more viscous than the mafic magmas. The chemical composition of diorite is intermediate, between that of mafic gabbro and felsic granite. Diorite is a plutonic igneous rock with intermediate composition between mafic and felsic rocks. phaneritic porphyritio pyroclastic aphanitic Question 3 1 pts Is peridotite mafic, felsic, intermediate, or ultramafic in composition? Some diorites contain biotite as well as hornblende, and some contain up to 10% quartz. Felsic rocks are light in color and are composed of feldspars and silicates. intrusive. Is rhyolite felsic or mafic or intermediate? It is visibly crystalline and usually has a granular texture (composed of roughly equally sized crystals) although the appearance may vary widely. The chemical composition of diorite is intermediate, between that of mafic gabbro and felsic granite. Its volcanic (fine-grained) analogue is andesite. Andesite and diorite likewise refer to extrusive and intrusive intermediate rocks (with dacite and granodiorite applying to those rocks with composition between felsic and intermediate). Both felsic and mafic igneous rocks can contain feldspar minerals. The classification based on mineralogy, into mafic and felsic, is accepted as the primary scheme of classification for rocks. 2. determine color/composition: mostly light minerals = felsic; half light, half black (or gray in fine grained rocks) = intermediate; mostly black minerals = mafic; mostly olivine = ultramafic Granite would be a felsic rock type, and basalt would be a mafic rock type. Start studying Igneous Rocks (Mafic or Felsic). Felsic minerals are usually light in color and have specific gravities less than 3. The chemical composition of diorite is intermediate and between felsic granite and mafic gabbro. Diorite is usually grey to dark-grey in colour, but it can also be black or bluish-grey, and frequently has a greenish cast. I need this worksheet completed. Additionally, they contain somewhat more gas than do the mafic magmas, but not quite as much as the felsic magmas (see below). Why not complete the set of stone variants with rhyolite, which is extrusive felsic, gabbro, which is intrusive mafic, and basalt, which is extrusive mafic? Extrusive Igneous Rocks No. The photograph below shows an outcrop where a light-colored, igneous rock is cross cut by a dark-colored, igneous rock. Common mafic rocks include basalt, diabase and gabbro. Felsic igneous rocks are light colored. Rhyme to remember diorite. mafic 96: - Based on your estimate, describe this rock as felsic, intermediate, mafic, or ultramafic. Rhyolite is an extrusive felsic (silicic) volcanic rock. Rhyolite is rarely found as lava. It is contrasted with mafic rocks, which are relatively richer in magnesium and iron.Felsic refers to silicate minerals, magma, and rocks which are enriched in the lighter elements such as silicon, oxygen, aluminium, sodium, and potassium. 15% 45% 85% 5% 30% 60% 95% Figure A5.5.1 The mafic minerals in photo A are shown as black areas in map B. Mafic Rock. This diorite is closer to the classic balance of mafic and felsic minerals (salt-and-pepper appearance). Mafic rocks often also contain calcium-rich varieties of plagioclase feldspar. I also will have the textbook attached. The high silica content and lower temperatures of rhyolite magma result in high viscosities and violent eruptive styles. The words mafic and felsic are used most often in the context of igneous rocks. Give a description of diorite "salt and pepper" visible crystals, heavy, dull and course grained. Igneous. Mafic rocks are darker and are composed of magnesium and iron. Diorite (red) on the QAPF diagram. Diorite is an intrusive igneous rock composed principally of the silicate minerals plagioclase feldspar, biotite, hornblende, and/or pyroxene. Question 1 1 pts Is diorite mafic, felsic, intermediate, or ultramafic in composition? It thus qualifies as a diorite. DIORITE - phaneritic rock (large crystals) of both mafic and felsic minerals. First of all, the terms mafic and felsic generally only apply to igneous rock. Diorite is an intrusive igneous rock composed principally of the silicate minerals plagioclase feldspar, biotite, hornblende, and/or pyroxene. 5.4.3 Mafic Enclaves and the Trondhjemite-Tonalite-Granodiorite (TTG) Suite. mafic. ultramafic mafic felsic intermediate Question2 1 pts What type of texture does rhyolite have? Post navigation ← Previous News And Events Posted on December 2, 2020 by even among igneous rocks, mafic and felsic are just ranges on a "spectrum" of composition. rhyolite felsic or mafic. With all of the volcano excitement at the moment I thought it might be a good time to recap on some of the basics since there seems to be some confusion getting about. Learn vocabulary, terms, and more with flashcards, games, and other study tools. felsic composition? Intermediate rocks are composed of the minerals amphibole and feldspar and contain a combination of light and dark minerals. Diorite is usually grey to dark-grey in colour, but it can also be black or bluish-grey, and frequently has a greenish cast. The chemical composition of diorite is intermediate, between that of mafic gabbro and felsic granite. This diorite is more salt than pepper, but it appears to have less than 10% quartz and no K-feldspar. This ne-grained, dark-colored, igneous rock is most likely A. rhyolite B. diorite C. basalt D. gabbro page 2 Felsic … They inform about the chemical composition of the various types of rocks. Diorite is an intrusive igneous rock composed principally of the silicate minerals plagioclase feldspar, biotite, hornblende, and/or pyroxene. Mafic Rocks and Rhyolite We have granite, which is intrusive felsic, diorite, which is intrusive intermediate, and andesite, which is extrusive intermediate. ANDESITE - aphanitic rock (small crystals) of both mafic and felsic minerals. The mixture of mafic and felsic minerals gives the rock a "salt and pepper" appearance. A link between felsic rocks, the TTG suite, and lode gold Au deposits has been drawn by Burrows et al. Is obsidian felsic or mafic? Diorite differs from gabbro depending on the composition of the plagioclase species. Use the scale above to estimate the percentage of mafic minerals in this rock. Mafic and Felsic, some igneous basics. intermediate mafic felsic granite, rhyolite) (diorite, andesite) (basalt, gabbro (peridotite, etc.) Compilations of many rock analyses show that rhyolite and granite are felsic, with an average silica content of about 72 percent; syenite, diorite, and monzonite are intermediate, with an average silica content of 59 percent; gabbro and basalt are mafic, with an average silica content of 48 percent; and peridotite is Felsic is a generic term meaning enriched in feldspar and silica (and thus generally lower in iron and magnesium). Those rich in quartz are classified as FELSIC, or acidic. Is diorite felsic or mafic? Unfortunately, I have no super close-up for you. Igneous Rocks. Posted on August 31, 2014 by triplejunction. Question Description This is Geology Unit 8 Igneous Rock 1. sample I1 has what mafic color index (MCI)? enough salt and pepper and you will diorite. Diorite is the name given to intrusive intermediate rocks, whereas andesite is the name given to extrusive intermediate rocks. Intrusive Equivalent: diorite; Other Characteristics: found as both lava and pyroclastic tuff; RHYOLITE. 8.8 sTudenT resPonses Sample I1 has what mafic color index (MCI)? The chemical composition of intermediate rocks such as diorite will range from magnesium and iron (mafic), to elements that form feldspar and quartz (felsic) Diorite will consist mostly of what is known as plagioclase, a very sodium rich group of feldspar minerals. Ulrich Kretschmar (Late), Derek McBride, in The Metallogeny of Lode Gold Deposits, 2016. Is diorite extrusive or intrusive? Obsidian. Being of intermediate composition between felsic and mafic, diorite is classically a salt and pepper rock made largely of white to light gray plagioclase and black hornblende. The chemical composition of diorite is intermediate, between that of mafic gabbro and felsic granite. Felsic is a term that refers to silicate minerals, magmas, and rocks which are enriched in the lighter elements such as silica, oxygen, aluminum, sodium, and potassium. Felsic, intermediate and mafic igneous rocks differ in their mineral composition. In geology, felsic is an adjective describing igneous rocks that are relatively rich in elements that form feldspar and quartz. Diorite `` salt and pepper '' visible crystals, heavy, dull and grained... Diorites contain biotite as well as hornblende, and/or pyroxene and between felsic.. Heavy, dull and course grained and silicates frequently has a greenish cast right the time. 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