Gabbro is a type of intrusive igneous rock that is coarse-grained and dark-colored, typically composed of calcium-rich plagioclase feldspar, pyroxene, and sometimes olivine. It is similar in composition to basalt, which is its extrusive equivalent.Study with Quizlet and memorize flashcards containing terms like T/F: In an igneous rock with a phaneritic texture, the mineral grains are visible to the unaided eye., Which of the following best describes a rock with 10-millimeter-long plagioclase crystals set in a fine-grained matrix of 0.5-millimeter-long crystals? - obsidian - pluton - porphyry - tuff, T\\F: Contact metamorphism occurs ...Granophyre ( / ˈɡrænəfaɪər / GRAN-ə-fire; [1] [2] from granite and porphyry) is a subvolcanic rock that contains quartz and alkali feldspar in characteristic angular intergrowths such as those in the accompanying image. The texture is called granophyric. The texture can be similar to micrographic texture and to the coarser graphic ... Petrology Mineral assemblage of igneous rocks Gabbro is a coarse-grained ( phaneritic) igneous rock that is relatively low in silica and rich in iron, magnesium, and calcium. Such rock is described as mafic. Gabbro is composed of pyroxene and calcium-rich plagioclase, with minor amounts of hornblende, olivine, and accessory minerals. [4] Gabbro–granite complexes formed in active continental margins provide critical constraints on magmatic processes, crust–mantle interactions, and tectonic evolution. The petrogenesis and tectonic setting of the Early Permian igneous rocks in the southeastern Central Asian Orogenic Belt have been a subject of dispute for a long time.4 Eyl 2023 ... Gabbro is a type of intrusive igneous rock that is coarse-grained and dark-colored, typically composed of calcium-rich plagioclase feldspar, ...Rigid-Body Spring model, example of analysis for gabbro-porphyry. Download : Download high-res image (326KB) Download : Download full-size image; Fig. 9. Rigid-Body Spring model, validation. Download : Download high-res image (267KB) Download : Download full-size image; Fig. 10. Photos of selected aggregates. Table 1.Porphyry. Porphyry is a type of igneous rock that is made up of large crystals of feldspar or quartz in a fine-grained matrix. This rock typically has a medium to dark color and is found in areas of volcanic activity. Some of the most common types of porphyry include diorite, gabbro, and granite. Jun 2, 2019 · Porphyry ("PORE-fer-ee") is a name used for any igneous rock with conspicuous larger grains—phenocrysts—floating in a fine-grained groundmass. Geologists use the term porphyry only with a word in front of it describing the composition of the groundmass. This image, for instance, shows an andesite porphyry. Aug 30, 2022 · This study is focused on mineral chemistry of pyroxenes in gabbro-dioritic rocks which are outcropped in the Daralu porphyry copper deposit area in the southern part of UDMA of Iran (Berberian and King 1981; Mohebi et al. 2015) (Fig. 1). They are emplaced alongside with Oligocene-Miocene granitoid rocks into the Eocene volcanoclastic ... gabbro porphyry rhyolite porphyry. A porphyritic igneous rock contains phenocrysts of olivine and calcium-rich plagioclase in an phaneritic groundmass. This is a _____? andesite porphyry basalt porphyry gabbro porphyry rhyolite porphyry. What is the dominant rock type on most of the Hawaiian Islands? basaltGabbro is available in dark grey to black colors whereas, Porphyry is available in black, brown, colourless, green, grey, red, rust, white colors. Appearance of Gabbro is Veined and Shiny and that of Porphyry is Dull. Properties of rock is another aspect for Gabbro vs Porphyry. The hardness of Gabbro is 7 and that of Porphyry is 6-7. The plutonic complex is dominated by coarse-grained biotite granite and fine-grained leucogranite, along with trace gabbro. The subvolcanic porphyry complex mainly consists of a granitic porphyry with subordinate monzonitic and quartz monzonitic porphyries. Mafic rocks are rare and occur mainly as remnants among the granitoid rocks.Gabbro, porphyritic-- porphyritic gabbro in Ombepera River, Epupa Complex, northwestern Namibia (formerly South-West Africa) -- see Figure D. Pegmatite -- "pegmatitic rocks associated with apatite veins of Ontario and Quebec." (Dictionary of Mining, Mineral, and Related Terms)b. basalt porphyry c. gabbro porphyry d. rhyolite porphyry 25. Which of the following is NOT an extrusive igneous rock? a. basalt b. andesite c. obsidian d. granite. D. Gabbro Boulders perfect for a misty‚ shaded glade‚ these natural boulders will ... Porphyry Plattens. You may also like...∗ Gabbro. Gabbro is a dark-coloured rock that has low silicon, high iron and high magnesium. The rock consists almost entirely of plagioclase feldspar ((Na,Ca)Al 2 Si 2 O 8) and the dark pyroxene mineral augite ( (Ca,Na)(Mg,Fe,Al,Ti)(Si,Al) 2 O 6) which contains the iron and magnesium.Diabase (/ ˈ d aɪ. ə ˌ b eɪ s /), also called dolerite (/ ˈ d ɒ l. ə ˌ r aɪ t /) or microgabbro, is a mafic, holocrystalline, subvolcanic rock equivalent to volcanic basalt or plutonic gabbro.Diabase dikes and sills are typically shallow intrusive bodies and often exhibit fine-grained to aphanitic chilled margins which may contain tachylite (dark mafic glass).. …28 Oca 2021 ... Keywords: Cu–Au porphyry deposit, fractional crystallization, gabbro, platinum-group elements, sulphide separation. Abstract. Porphyry Cu–Au ...... gabro and diorite. The gabbro and the diorite cut by fine crystalline gabbro, diorite porphyry, fine crystalline diorite and diabase dykes. The plagioclases ...( Fr- porphyre; Ger- Porphyr; Nor- porfyr; Rus- ) PORPHYRY(See also LEOPARDITE & LEOPARD ROCKentry.) A. Porphyry. [or rock]" (height of egg - 6.1 cm) from unspecified locality in California. Claude Pelisson's collection. (© photo by Claude Pelisson) B. Porphyry. Egypt, Italy and Rumania fashioned as cabochons(greaterDiabase (/ ˈ d aɪ. ə ˌ b eɪ s /), also called dolerite (/ ˈ d ɒ l. ə ˌ r aɪ t /) or microgabbro, is a mafic, holocrystalline, subvolcanic rock equivalent to volcanic basalt or plutonic gabbro.Diabase dikes and sills are typically shallow intrusive bodies and often exhibit fine-grained to aphanitic chilled margins which may contain tachylite (dark mafic glass).. Diabase is the ...Examples of intrusive igneous rocks are: diabase, diorite, gabbro, granite, pegmatite, and peridotite. Extrusive igneous rocks erupt onto the surface, where they cool quickly to form small crystals. Some cool so quickly that they form an amorphous glass. These rocks include: andesite, basalt, dacite, obsidian, pumice, rhyolite, scoria, and tuff ...The unique igneous rock (scapolite–diopside gabbro) from the Ilmeny Mountains in the southern Urals is described. Gabbro fills a segment of dike 1.3 m thick that cuts through calcite–dolomite ...a. Fine-grained matrix (groundmass) a. Matrix dominated by glassy fragments. b. Hot fragments may "weld" together. - Volcano built up of alternate layers of lava and ash. Study with Quizlet and memorize flashcards containing terms like Composition of igneous rocks (silicic, intermediate, mafic, ultramafic), Classification of common igneous ...Study with Quizlet and memorize flashcards containing terms like What is a rock with both large and microscopic mineral grains called? -Aphanitic. -Glass. -Phaneritic. -Porphyritic. -Tuff., What is a rock made of unordered atoms called? -Aphanitic. -Glass. -Phaneritic. -Porphyritic. -Tuff., Which rock is composed of volcanic ash particles cemented together? …A)Basalt B)gabbro C)granite D)peridotite, What type of volcanic rock contains a large number of vesicles (bubbles) that form when gases escape from the solidifying melt? A) granite B) obsidian C) porphyry D) pumice, Which of the following volcanic rocks is made up of lithified pyroclastic material? A) Basalt B) granodiorite C) obsidian D) tuff ...Gabbro is actually the name of an Italian town in Tuscany. It is a rock, i.e. a mixture of several minerals. The stone is not yet recognised by IMA ( ...Examples of phaneritic igneous rocks are gabbro, diorite and granite. Porphyritic textures develop when conditions during cooling of a magma change relatively quickly. The earlier formed minerals will have formed slowly and remain as large crystals, whereas, sudden cooling causes the rapid crystallization of the remainder of the melt into a ...Igneous rocks from left to right: gabbro, andesite, pegmatite, basalt, pumice, porphyry, obsidian, granite, and tuff #GeologyHere #Rock.High Mg# in micro-gabbro porphyry and micro-diorite porphyry indicates a more mafic source. All of the mafic vein rocks are predominantly metalluminous with low A/CNK ratios (< 0.8). There is an ...ETfp: hornblende and quartz-plagioclase porphyry plugs and dikes; ETg: undivided felsic intrusive rocks; ETgb: gabbro, diabase; ETgd: equigranular, coarse-grained, hornblende-biotite-feldspar porphyriticGabbro is a type of intrusive igneous rock that is coarse-grained and dark-colored, typically composed of calcium-rich plagioclase feldspar, pyroxene, and sometimes olivine. It is similar in composition to basalt, which is its extrusive equivalent.13 Nis 2023 ... They display porphyritic texture and include coarse-grained clinopyroxene with diopside compositions (Wo = 46.89, En = 40.78, Fs = 12.32), ...Gabbro is a coarse-grained mafic igneous rock, made with mainly mafic minerals like pyroxene and only minor plagioclase. Because mafic lava is more mobile, it is less common than basalt. Gabbro is a major component of the lower oceanic crust. Gabbro: Gabbro is commonly used for construction, especially as crushed stone for road building and concrete aggregate. In summary, diorite, granite, and gabbro are all igneous rocks with distinct mineral compositions, textures, and applications. Diorite falls in the intermediate composition range and is known for its mottled appearance and ...ETfp: hornblende and quartz-plagioclase porphyry plugs and dikes; ETg: undivided felsic intrusive rocks; ETgb: gabbro, diabase; ETgd: equigranular, coarse-grained, hornblende-biotite-feldspar porphyriticProperties. Reserves. 1 Definition. 1.1 Definition. Gabbro is an intrusive igneous rock which is chemically equivalent to plutonic Basalt. Basalt is a common extrusive igneous rock formed by the rapid cooling of basaltic lava exposed at or very near the surface of Earth. 1.2 History.Diorite ( / ˈdaɪ.əraɪt / DY-ə-ryte) [1] [2] is an intrusive igneous rock formed by the slow cooling underground of magma (molten rock) that has a moderate content of silica and a relatively low content of alkali metals. It is intermediate in composition between low-silica ( mafic) gabbro and high-silica ( felsic) granite . 5 Oca 2001 ... Gabbro: 70% pyroxene (blocky), 20% Ca plagioclase (iridescent), 10 ... Andesite Porphyry: 70% groundmass (aphanitic; too fined grained to see ...Magmas, lavas, and igneous rocks are composed mostly of the same (8) elements: Ferromagnesian (Fe-Mg) Most dark colored igneous rocks are rich in Ca plagioclase and _______ minerals such as pyroxene or olivine. Mafic (basic) _______ refers to igneous rocks. Contains magmas, lavas, and igneous rocks containing 45-53% silica.Quartz was the mineral upon which the Stone Ages were based. With few exceptions, most early stone tools were fashioned of quartz. Outcrops of quartz that were suitable for tool manufacturing were targeted by some of the earliest known mining activities and the mined quartz was traded across vast distances, even before humans began to establish …Flowerstone. "Flowerstone (also known as Chrysanthemum Stone, Snowflake Stone and is similar to Chinese Writing Rock and Rice Rock) is a gabbro porphyry of feldspar crystals usually in basalt that …The plutonic complex is dominated by coarse-grained biotite granite and fine-grained leucogranite, along with trace gabbro. The subvolcanic porphyry complex mainly consists of a granitic porphyry with subordinate monzonitic and quartz monzonitic porphyries. Mafic rocks are rare and occur mainly as remnants among the granitoid rocks.... gabbro to syenite composition. The batholith lies length-wise in a major cross ... It is more porphyritic than the diorite porphyry and exhibits euhedral ...Porphyry ( / ˈpɔːrfəri / POR-fə-ree) is any of various decorative granites or igneous rocks with coarse-grained crystals such as feldspar or quartz dispersed in a fine-grained silicate -rich, generally aphanitic matrix or groundmass. The larger crystals are called phenocrysts. [1]The Haoyaoerhudong gabbro is a mafic intrusion located in the Haoyaoerhudong gold deposit, which is a giant gold deposit (148 t Au) hosted in Proterozoic strata on the northern margin of the North China Craton. In this paper, we present integrated SHRIMP U–Pb, geochemical and Sr–Nd isotopic data from gabbro of the Haoyaoerhudong gold deposit to reveal the magmatic processes behind its ...Olivine Pyroxene Basalt Porphyry 52 104 Igneous Rock Aphanitic -- Porphyritic -- Phenocrysts are ... Basalt/gabbro S High Red garnets scattered uniformly throughout a ...Basalt porphyry and diabase dikes, believed to originate from the Salem Gabbro-diorite facies, cut the volcanic sequence, notably on Cat Island, whereas ...Jul 15, 2019 · Alkaline-related epithermal to porphyry gold is one of the most important types of auriferous mineralization types. Some of the largest gold-copper mines actually are actually alkaline-related ... Apr 26, 2007 · At one contact, a ∼20 cm thick zone of strongly quenched porphyry separates cg granite from chilled gabbro. Porphyry in the southern (basal) part of this body is phenocryst-rich with a strongly quenched matrix; toward the northern (upper) contact the porphyry decreases in phenocryst abundance and increases in matrix grain size (Wiebe et al ... gabbro andesite basalt. Grains are alkali feldspar and quartz. The length of the figure is about 2 cm. The diagram above most likely represents a _____ extrusive igneous rock intrusive igneous rock clastic sedimentary rock chemical sedimentary rock. The coarse grained equivalent of a basalt is a: rhyolite gabbro andesite basalt Gabbros are generally dark colored. They are dominated by Ca-rich plagioclase, which tends to be darker than the Na-rich variety, and by pyroxene.Jun 24, 2005 · Gabbro, porphyritic-- porphyritic gabbro in Ombepera River, Epupa Complex, northwestern Namibia (formerly South-West Africa) -- see Figure D. Pegmatite -- "pegmatitic rocks associated with apatite veins of Ontario and Quebec." (Dictionary of Mining, Mineral, and Related Terms) Gabbro is a dark-colored igneous rock that is considered to be the plutonic equivalent of basalt. Unlike granite, gabbro is low in silica and has no quartz. Also, gabbro has no alkali feldspar, only plagioclase feldspar with a high calcium content. ... Porphyry ("PORE-fer-ee") is a name used for any igneous rock with conspicuous larger grains ...Magmas, lavas, and igneous rocks are composed mostly of the same (8) elements: Ferromagnesian (Fe-Mg) Most dark colored igneous rocks are rich in Ca plagioclase and _______ minerals such as pyroxene or olivine. Mafic (basic) _______ refers to igneous rocks. Contains magmas, lavas, and igneous rocks containing 45-53% silica. Rhyolite is an extrusive igneous rock, formed from magma rich in silica that is extruded from a volcanic vent to cool quickly on the surface rather than slowly in the subsurface. It is generally light in color due to its low content of mafic minerals, and it is typically very fine-grained ( aphanitic) or glassy. [5]L110 - porphyritic rhyolite. L110 hand specimen. Note the bimodal crystal size between groundmass and phenocrysts, and the difference in habit of phenocryst quartz (rounded) and alkali feldspar (more angular). L110 thin section, plane polarised light. Both a rounded quartz phenocryst and the finely crystalline groundmass are observed.Vesicular texture is a volcanic rock texture characterised by, or containing, many vesicles. The texture is often found in extrusive aphanitic, or glassy, igneous rock. The vesicles are small cavities formed by the expansion of bubbles of gas or steam during the solidification of the rock. Rock types that display a vesicular texture include ...Porphyry. Porphyry is a type of igneous rock that is made up of large crystals of feldspar or quartz in a fine-grained matrix. This rock typically has a medium to dark color and is found in areas of volcanic activity. Some of the most common types of porphyry include diorite, gabbro, and granite.The plutonic complex is dominated by coarse-grained biotite granite and fine-grained leucogranite, along with trace gabbro. The subvolcanic porphyry complex mainly consists of a granitic porphyry with subordinate monzonitic and quartz monzonitic porphyries. Mafic rocks are rare and occur mainly as remnants among the granitoid rocks.ETfp: hornblende and quartz-plagioclase porphyry plugs and dikes; ETg: undivided felsic intrusive rocks; ETgb: gabbro, diabase; ETgd: equigranular, coarse-grained, hornblende-biotite-feldspar porphyriticThe δ 18 O WR values from Leimengou granite porphyry range from 7.14‰ to 7.97‰, which are similar with δ 18 O WR of altered oceanic crust or granulite xenoliths (Fig. 13 b). Therefore, the low δ 18 O zircon values of Leimengou granite porphyry may be related to mixing between an igneous member with mantle-like δ 18 O zircon values andOct 21, 2023 · A)Basalt B)gabbro C)granite D)peridotite, What type of volcanic rock contains a large number of vesicles (bubbles) that form when gases escape from the solidifying melt? A) granite B) obsidian C) porphyry D) pumice, Which of the following volcanic rocks is made up of lithified pyroclastic material? A) Basalt B) granodiorite C) obsidian D) tuff ... Gabbro. Gabbro is a silica-poor and Fe-Mg-rich intrusive rock formed when molten rock is trapped beneath the land surface and cools into a hard, coarsely crystalline mass. It is the intrusive equivalent to basalt. Minnesota's best examples of gabbro are in the part of the 1.1 billion-year-old Midcontinent Rift exposed in the large hills in and ...Porphyry (geology) Porphyry ( / ˈpɔːrfəri / POR-fə-ree) is any of various decorative granites or igneous rocks with coarse-grained crystals such as feldspar or quartz dispersed in a fine-grained silicate -rich, generally aphanitic matrix or groundmass. The larger crystals are called phenocrysts. [1]You'll get a detailed solution from a subject matter expert that helps you learn core concepts. Question: Part A Which of the following is a folsic rock that started crystallizing within a large mass of magma but was then erupted on the surface of a continent? View Available Hint (s) granite porphyry basalt porphyry o peridotite gabbro ...Gabbro, porphyritic-- porphyritic gabbro in Ombepera River, Epupa Complex, northwestern Namibia (formerly South-West Africa) -- see Figure D. Pegmatite -- "pegmatitic rocks associated with apatite veins of Ontario and Quebec." (Dictionary of Mining, Mineral, and Related Terms)View Available Hint(s) granite porphyry basalt porphyry o peridotite gabbro Candosito Submit . Please Help. Please Make Answer Clear. Show transcribed image text. Expert Answer. Who are the experts? Experts are tested by Chegg as specialists in their subject area. We reviewed their content and use your feedback to keep the quality high.Porphyry is used as a noun after the rock name if more than 50% of the rock is made of phenocrysts. Example: Basalt porphyry. Vesicular volcanic rocks: Vesicular is the adjective used to modify the name of any fine-grained igneous (volcanic) rock which has vesicles (holes from gas bubbles), making a cinder-like or clinker-like appearance.gabbro andesite basalt. Grains are alkali feldspar and quartz. The length of the figure is about 2 cm. The diagram above most likely represents a _____ extrusive igneous rock intrusive igneous rock clastic sedimentary rock chemical sedimentary rock. The coarse grained equivalent of a basalt is a: rhyolite gabbro andesite basaltGabbro GABBRO: with clinopyroxene NORITE: with orthopyroxene OLIVINE GABBRO: with olivine TROCTOLITE: olivine and plagioclase only ... Quartz Diorite Porphyry: Diorite Porphyry: Gabbro Porphyry: Theralite Porphyry: Aphanitic Groundmass Dikes, sills, laccoliths, surface flows, margins of larger masses, welded tuffs :Magmas, lavas, and igneous rocks are composed mostly of the same (8) elements: Ferromagnesian (Fe-Mg) Most dark colored igneous rocks are rich in Ca plagioclase and _______ minerals such as pyroxene or olivine. Mafic (basic) _______ refers to igneous rocks. Contains magmas, lavas, and igneous rocks containing 45-53% silica. The greenstone belt consists of massive epidiorite, gabbro and dolerite. It is intruded by a number of porphyry dykes forming steep conspicuous hills. The porphyry magma has dissolved portions of the greenstone to form chlorite patches, giving the rock a fragmented appearance. Intensely brecciated jasper occurs of the junction of the dykes and ...Gabbro GABBRO: with clinopyroxene NORITE: with orthopyroxene OLIVINE GABBRO: with olivine TROCTOLITE: olivine and plagioclase only ... Quartz Diorite Porphyry: Diorite Porphyry: Gabbro Porphyry: Theralite Porphyry: Aphanitic Groundmass Dikes, sills, laccoliths, surface flows, margins of larger masses, welded tuffs :with the quartz porphyry and quartz-feldspar porphyry intrusions north of Bolloch Lake is uncertain. ... Pyroxenite, melagabbro, gabbro and porphyritic gabbro ( ...Monzonite is a coarse-grained ( phaneritic) igneous rock. Such rocks are classified by their relative percentages of quartz, plagioclase, alkali feldspar, and feldspathoid (the QAPF classification ). Monzonite is defined as rock having less than 5% quartz in its QAPF fraction and in which alkali feldspar makes up between 35% and 65% of the ...Porphyry. Porphyry is a type of igneous rock that is made up of large crystals of feldspar or quartz in a fine-grained matrix. This rock typically has a medium to dark color and is found in areas of volcanic activity. Some of the most common types of porphyry include diorite, gabbro, and granite. High Mg# in micro-gabbro porphyry and micro-diorite porphyry indicates a more mafic source. All of the mafic vein rocks are predominantly metalluminous with low A/CNK ratios (< 0.8). There is an ...396 PETROGRAPHY The intrusive rocks are mainly gabbroic in composition. They can be divided into gabbro porphyry, olivine gabbro, olivine dolerite and olivine monzo-gabbro based on mineralogy and ...Rhyolite is an extrusive igneous rock with a very high silica content. It is usually pink or gray in color with grains so small that they are difficult to observe without a hand lens. Rhyolite is made up of quartz, plagioclase, …An example is the hornblende andesite porphyry shown in the accompanying photo. Andesite outcrop: Close view of an andesite lava flow at Brokeoff Volcano in California. Photo by the United States Geological Survey. Rock & Mineral Kits: Get a rock, mineral, or fossil kit to learn more about Earth materials. The best way to learn about rocks is ...Diabase (dolerite) is a dark-colored igneous rock. It is compositionally equivalent to gabbro and basalt but texturally between them. Diabase is a common rock type. It occurs mostly in shallow intrusions (dikes and sills) of basaltic composition. It grades to basalt when it solidifies rapidly and to gabbro when more time is given to the ... Porphyry. Porphyry is a type of igneous rock that is made up of large crystals of feldspar or quartz in a fine-grained matrix. This rock typically has a medium to dark color and is found in areas of volcanic activity. Some of the most common types of porphyry include diorite, gabbro, and granite.Pegmatites are extreme igneous rocks that form during the final stage of a magma’s crystallization. They are extreme because they contain exceptionally large crystals and they sometimes contain minerals that are rarely found in other types of rocks. To be called a "pegmatite," a rock should be composed almost entirely of crystals that are at ...Geological map of the Sora deposit: 1—gabbro, monzogabbro, syenogabbro (Kogtakh complex); 2—syenodiorite, syenite, granodiorite, diorite, monzonite (Martaiga ...Oct 21, 2023 · A)Basalt B)gabbro C)granite D)peridotite, Wha, At one contact, a ∼20 cm thick zone of strongly quenched porphyry separates cg g, The Wark gabbro diorite occurs in all of the larger areas mapped as Turtleback complex. It is part, Gabbro–granite complexes formed in active continental margins p, Andesite Basalt Dacite Diorite Gabbro Granite Granodiorite Ignimbrite Perido, Feb 22, 2020 · Gabbro and Basalt are Related Gabbros are equivalent in , Within the hypersthene gabbro there are occasionally coarse-grained patches, ( Fr- porphyre; Ger- Porphyr; Nor- porfyr; Rus- ) POR, Gabbro is available in dark grey to black colors whereas,, A phenocryst is a large crystal that visually stands out com, High Mg# in micro-gabbro porphyry and micro-diorite porphyry i, b. basalt porphyry c. gabbro porphyry d. rhyolite porphyry 25. Which , Gabbro and Basalt are Related Gabbros are equivalent in co, What is Gabbro? Gabbro is a coarse-grained, dark-colored, intrusive, Magmas, lavas, and igneous rocks are composed mostly o, Porphyry copper deposits are copper ore bodies that are , Gabbro Intrusive or Extrusive. Intrusive (Plutonic) Gabbro Color In, High Mg# in micro-gabbro porphyry and micro-diorite porphyry indicates.