Our site includes quite a bit of content, so if you're having an issue finding what you're looking for, go on ahead and use that search feature there! It is produced in volcanic arcs, and in mountain building where it can occur in large volumes as batholiths in the roots of mountains (e.g. – Cobblestone streets in Scotland, England, etc.– Statue at Gudea in Mesopotamia dating back to the BCE.– Porphyry vase in predynastic Egypt dating back to 3,600 BCE. The presence of sodium-rich feldspar, oligoclase or andesine, in contrast to calcium-rich plagioclase, labradorite or bytownite, is the main distinction between diorite and gabbro . Its volcanic (fine-grained) analogue is andesite. The use of Diorite in art was most important in Middle Eastern cultures such as ancient Egypt, Babylonia, Assyria, and Sumer. Sign up to receive the latest and greatest articles from our site automatically each week (give or take)...right to your inbox. Basalt underlies more of Earth's surface than any other rock type. It is easily recognized by geologists by virtue of its unique texture, and its "salt and pepper" appearance in terms of coloration. Unlike many other minerals, there is little data related to the diorite mining and processing industries available to the public. This is an igneous rock having a granular structure and is formed in areas known for active volcanism. Diorite is an intermediate intrusive rock which is gray to dark-gray or black and composed principally of plagioclase feldspar, biotite, and hornblende or pyroxene. The preceding results indicate that the coupling ratio plays a very important role in the size of the fractured zone. It has a durability that compares favorably to granite and trap rock. As you go through these facts, you will realize why igneous rocks are so popular in numerous fields including construction and jewelry making. Mica can be found in nicely-fashioned hexagonal crystals, and hornblende may appear as needle-like crystals. » The texture of this rock is coarse-grained, i.e., its grains are larger in size. By Oishimaya Sen Nag on December 1 2017 in Environment. However, sometimes the magma doesn’t succeed in reaching the Earth’s surface and turns into solid state. Moreover, there was a vase made in ancient Egypt from diorite with spectacular feldspar phenocrysts. Diorite is an intermediate intrusive igneous phanerites (large grain size) presenting hypidiomorphic (granular) to allotriomorphic (very large crystallographically continuous crystals) texture with about 60–80% of the Na–plagioclase, oligoclase and Na–Ca–plagioclase and little or no quartz. Diorite, being a relatively rare mineral, is only commercially mined in small pockets of areas where its deposits occur, such as the United Kingdom and some other European countries, New Zealand, and a few sub-Saharan African, South American, and North American countries. It most commonly forms as an extrusive rock, such as a lava flow, but can also form in small intrusive bodies, such as an igneous dike or a thin sill. It is also used to control soil erosion by being utilized as a drainage stone. Granodiorite contained a large amount of sodium (Na) and calcium (Ca) rich plagioclase, potassium feldspar, quartz, and minor amounts of muscovite mica as the lighter colored mineral components and biotite, amphiboles frequently inside of hornblende more abundant than the granite. Diorite is an intrusive rock intermediate in composition between gabbro and granite. It consists of the plagioclase feldspar minerals andesine and oligoclase, together with one or more dark, ferromagnesian minerals such as pyroxene and biotite. It is usually found in granite or gabbro intrusions, often in volcanic arcs or areas with cordilleran mountain building going on. Andesite is the volcanic equivalent of diorite. As the basaltic magma melts the granite bed it produces granitic magma, and such a mixture of magma has a composition of both granite and basalt. Even though this stone was used by sculptors of the Middle East in ancient times, its hardness makes it difficult to use for sculpting, and hence it is not favored as a sculpting stone by artists of our present day and age. Ancient civilizations, including the Inca and Maya of the New World, used this stone as a structural stone in building their marvelous architectural wonders. Diorite is used as a base material in the construction of roads, buildings, and parking areas. It has a composition similar to gabbro. Diorite might contain small amounts of apatite, ilmenite, microcline, and other minerals. Copyright © Science Struck & Buzzle.com, Inc. Because of its importance and symbol of life, it was used as part of the procession to bury the pharaoh. If this magma cools and crystallizes before it reaches the surface of the earth, it results in the formation of diorite deposits. Diorite formations usually take place in volcanic arc regions above subducting plates, or as batholiths during cordilleran mountain building. These cookies will be stored in your browser only with your consent. Diorite generates in weaponsmith houses, tannery houses, and mason houses in snowy tundra villages . Diorite grades into monzonite with an increase in the alkali feldspar content. Diorite is frequently used in the stone industry for cutting tile, stone, ashtrays, blocking, curbing, pavers and products of various dimensions. Igneous rocks are those that form via the process of melting and cooling. Although this rock is known to be formed in areas below the surface of the Earth, it can also be found over the surface depending on its weathering and erosion. The use of diorite in art was most important among very early Middle Eastern civilizations such as Ancient Egypt, Babylonia, Assyria and Sumer. In later times, diorite was commonly used as cobblestone; today many diorite cobblestone streets can be found in England, Guernsey and Scotland, and scattered throughout the world in such places as Ecuador and China. See also: diabase Compare with: dolerite, gabbro. Due to this fervent procedure, the minerals get clustered together to form chunks. It is also used to control soil erosion by being utilized as a drainage stone. » The hardness of diorite rock is 7 on Moh’s scale. They are of various sizes and shapes, depending on the type of rock. Physical properties of rocks play an important role in determining its applications in various fields. This diorite statue was made in approximately 2090 BC. Perhaps the most famous diorite work extant is the Code of Hammurabi, inscribed upon a 2.23 m (7 ft 4 in) pillar of black diorite. An igneous rock formed by subterranean crystallized magma, Diorite is composed of plagioclase feldspar, quartz, hornblende, pyroxene and biotite. When hot magma or lava solidifies into its pools that have been formed under the surface of the Earth, diorite is formed. It is also used to control soil erosion by being utilized as a drainage stone. It is igneous equivalent of dacite. Diorite was also mined in the ancient world, as is evident by the extensive use of this rock in ancient architecture. Thus, major works in diorite tend to be important. One such famous example is that of the code of Hammurabi, a 7-feet tall pillar that is made from diorite. » It has an appearance similar to that of a combination of salt and pepper. Because it is commonly speckled black and white, it is often referred to as "salt and pepper" rock. Diorite is an intermediate intrusive rock which is gray to dark-gray or black and composed principally of plagioclase feldspar, biotite, and hornblende or pyroxene. Diorite deposits are relatively rare, and most commonly occur as sills, dikes, or stocks, or in the form of large masses as batholiths, and are often associated with coinciding with gabbro and granite deposits. The Nile was extremely important in Egyptian culture, for it provided fertility of the land and represented life for the people who used it. The code's tablet is designed as a 7-foot-tall, black pillar with inscriptions of these early Babylonian laws. The hardness of diorite makes it easier for craftsmen to cast it into the desired shape. It is used for engraving text and letters and is considered apt for carving out statues. Granodiorite compositionis felsic intermediate rock. Would you like to write for us? Diorite, medium- to coarse-grained intrusive igneous rock that commonly is composed of about two-thirds plagioclase feldspar and one-third dark-coloured minerals, such as hornblende or biotite. It is also used in the construction industry as well as for making paving blocks. It is also used in the construction industry as well as for making paving blocks. The color of diorite varies from grey to dark grey to black, speckled with lighter colors that may appear white. Diorite is a black or blue-gray igneous rock with a greenish tint and "salt and pepper" appearance composed of plagioclase, biotite, hornblende, and pyroxene. They have a coarse texture with large mineral grains, indicating that they spent thousands or millions of years cooling down inside the earth, a time course that allowed large mineral crystals to grow. But opting out of some of these cookies may have an effect on your browsing experience. diorite synonyms, diorite pronunciation, diorite translation, English dictionary definition of diorite. Buol, in Reference Module in Earth Systems and Environmental Sciences, 2013. » Igneous rocks are classified into two main categories: intrusive and extrusive. It has a coarse, grainy structure, wherein its large grains are arranged in an interlinked pattern. In Corsica, a Mediterranean island belonging to France, an orbicular (spheroidical) variety of diorite is found which is referred to as "Corsite" or "Napoleonite", in homage to its place of origin and the French leader, respectively. It doesn’t contain flat planes too. You also have the option to opt-out of these cookies. Uses. Facts about Diorite 10: the usage of diorite. Diorite was used extensively by ancient civilizations for vases and other decorative artwork and is still used for art today (Figure 1). Many cobblestone streets in England, Scotland, and other places around the world were constructed using diorite. It can be found worldwide, but is relatively uncommon. It has a durability that compares favorably to granite and trap rock. The difference between basalt and gabbro is that basalt is a fine-grained rock while gabbro is a coarse-grained rock. Diorite is a hard igneous rock like granite In areas where diorite occurs near the surface, it is sometimes mined for use as a crushed stone. Spread the word of various sizes and shapes, depending on the type of rock a stone. Are arranged in an interlinked pattern formed by subterranean crystallized magma, diorite generates in coral reefs replacing! Color of diorite varies from grey to dark grey to black, speckled with colors. 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