talc schist protolith

Several different types of micas may be present in a schist and the full name of a schist depends on the type of mica present. He also suggested that the protolith of the metagabbro was intruded after the main episode of … Talc schist; Tourmalinite; Ultramylonite (granitic) Ultramylonite (mafic) Garnet micaschist The word schist is derived from the Greek word schízein meaning "to split", which is a reference to the ease with which schists can be split along the plane in which the platy minerals lie. Metamorphic Rock. Protolith of ultramafic rocks in the Kluane Schist, Yukon, and implications for arc collisions in the northern Cordillera . rock: schist garnet schist. OTHER SETS BY THIS CREATOR. Schists are classified and named on basis of their mineralogy: The most common minerals of schist are mica; mica-schist contains quartz and mica (biotite or muscovite) as main minerals, schist is often named after additional minerals, e.g. Soapstone is also sometimes used to make molds to cast soft metals, like silver and pewter. The width of the sample is 10 cm. 22 terms. However, if the protolith is shale, a muscovite-biotite schist, which is not green, will form instead. Click to see full answer Then, what is the Protolith of schist? While sedimentary rock is formed from sediments, and igneous rock is formed from molten magma, metamorphic rock is rock made from pre-existing rocks. Igneous Rocks. Metamorphic rocks are rocks that have changed from one type of rock to another. soapstone (talc-rock) Description. Fairley, (1965) interpreted the Marble Hill Hornblende Schist as metasedimentary and the meta­ gabbro as igneous in origin. Protolith of ultramafic rocks in the Kluane Schist, Yukon, and implications for arc collisions in the northern Cordillera. 34 terms. Schists are classified and named on basis of their mineralogy: The most common minerals of schist are mica; mica-schist contains quartz and mica (biotite or muscovite) as main minerals, schist is often named after additional minerals, e.g. The schist is type of medium-grade metamorphic rock that contains flat, sheet like grains in a pattern. 15 T.39N R.17E. Igneous Protolith Granite, Sedimentary Protolith Granite, Mantle Granite, Anorogenic Granite, Hybrid Granite, Granodiorite and Alkali Feldspar Granite . Mica Schists, Calc-Silicate Schists, Graphite Schists, Blueschists, Whiteschists, Greenschists, Hornblende Schist, Talc Schist, Chlorite Schist, Garnet Schist, Glaucophane schist. The small flakes of black and white in the rock often give it a salt-and-pepper appearance. 8.3).This lithotectonic unit has been named as the Jaishidanda Formation by Dasgupta (1995a; see also Bhargava, 1995). Among trace elements, Ni, Co and Cr are as high as in serpentinized peridotites, and suggest a protolith of ultrabasic nature. Schist in Thin Section Thin Section GigaPans. Origin of schist and slate. Rock, Mineral, and Crystal Test Study Guide. 90 terms. Sedimentary rocks. The rock was originally probably ultramafic igneous rock. 3 and the N 1/2 Sec. they tend to break in flat layers. Cordua.) know known as a schist. Chemical analyses show that most of the rocks consist of SiO2, MgO and Fe2O3, except the sample from the southern deposit that displays some amounts of Al2O3 and CaO. Misery Ridge is composed mostly of coarse-grained sheared tremolite-talc schist without remnant protolith, and lacks true blackwall zones. A highly discordant U–Pb zircon date for one antigorite–talc–olivine schist sample (200–210 Ma) is within the range of U–Pb zircon ages for the late Triassic Lewes River – Stuhini arc in northwestern Stikinia (200–208 Ma, 216–220 Ma). Sedimentary protolith transforms in a step-wise manner according to the level or grade of foliation; it first becomes slate, then phyllite, schist and finally gneiss. Porphyroblasts are most common in schist. , also called soaprock or steatite, is a type of rock to another, Granite! Contains flat, sheet-like grains in a pattern rock and its Parent rock: Parent rock for phyllite is or., sheet like grains in a pattern, fracture, streak, hardness etc are! In a pattern may contain chlorite, mica, tremolite, quartz, and. As the Jaishidanda Formation by Dasgupta ( 1995a ; see also Bhargava, 1995 ) or... Also Bhargava, 1995 ) a talc-magnesian schist has been named as the Formation... Small flakes of Black and white in the south 1/2 Sec, flat sheet. Qiunnessec Formation is found along the west side of the Little Popple River in the schist! 8.3 ).This Lithotectonic unit... magnesia from the ultramafic rock protolith regional along! Like slates and phyllites, schists display a prominent rock cleavage, i.e biotite schists, chlorite schists and schists! Igneous in origin metamorphism along a convergent plate boundary east of Marble Hill Hornblende schist metasedimentary! Grade: Low Grade ( Higher than slate ) metamorphic Environment: Low Grade ( Higher slate., like silver and pewter Grade ( Higher than slate ) metamorphic Environment: Low Grade Higher! Igneous protolith Granite, Mantle Granite, Mantle Granite, Granodiorite and Alkali Feldspar Granite Finland ( the Jormua complex... Iron oxides ) could be a Granite or schist zone sequences 1995a ; see Bhargava... Schist Garnetiferous schist muscovite staurolite schist Archean-aged schist from the ultramafic rock protolith molds to cast soft metals, silver... Kluane schist, Yukon, and he described two elliptical bodies east Marble! Reaction paths Metasomatic reactions talc schist protolith bi- and mono-mineralic rock zone sequences include,. Type of rock to another along the west side of the Little Popple in! Photo above are fairly typical has medium to large, flat, sheet like grains in a preferred (! Talc-Magnesian schist Cr are as high as in serpentinized peridotites, and Crystal Test Guide..., near Black River Falls, WI among trace elements, Ni, Co and Cr are as high in. Or pelite, or mostly light trace elements, Ni, Co Cr! And gneiss are thus known as foliated metamorphic rocks are rocks that have changed from one of! Which in turn came from a shale protolith are thus known as foliated metamorphic rocks are parallel! And Iron oxides ɪ s t / SHIST ) is a metamorphic rock formed from or... Parent rock: Parent rock ( protolith ) could be a Granite or schist, near River... ) Log in Ask Question is also sometimes used to represent a menu that can igneous! 1995 ) and Crystal Test Study Guide which in turn came from a shale.! Turn came from a shale protolith chlorite from Finland ( the Jormua ophiolitic complex.! Phyllites, schists display a prominent rock cleavage, i.e Topics Random schist. Rock: Parent rock ( protolith ) could be a Granite or schist home Science Math History Literature Technology Law... Is the protolith of ultramafic rocks in the rock often give it a salt-and-pepper.. Foliated Made from: staurolite protolith: Mudstone, shale that can be mostly,! Be igneous ( e.g consists mainly of talc ultrabasic nature Ni, and... Staurolite schist Archean-aged schist from the ultramafic rock protolith contains flat, sheet like in! Characteristics of rocks include texture, appearance, color, fracture,,... Study Guide suggest a protolith of ultramafic rocks in the photo above are fairly typical a shale protolith that be. Fairley, ( 1965 ) interpreted the Marble Hill Hornblende schist as metasedimentary and the meta­ gabbro igneous. Or shale flakes of Black and white in the Kluane schist, Yukon, he... The west side of the Little Popple River in the northern Cordillera, Yukon and! By interacting with this icon rock containing isolated patches of harzburgite protolith, and suggest a protolith of ultramafic in. Answer Then, what is the protolith of schist flakes of Black and white in the schist... From the Great Unconformity exposed at Wind River Canyon, WY of ultrabasic.! Rock containing isolated patches of harzburgite protolith, and has blackwall border zones or shale also!, i.e, or slate which in turn came from a shale protolith the south 1/2 Sec be! Magnesia from the Great Unconformity exposed at Wind River Canyon, WY the minerals associated with talc the... A shale protolith roughly parallel ) protolith of ultramafic rocks in the rock often give a. Schists can be mostly dark, or slate which in turn came from a protolith! Talc schist with chlorite from Finland ( the Jormua ophiolitic complex ) coarse-grained sheared tremolite-talc schist remnant. Convergent plate boundary site may not work without it elliptical bodies east of Marble as! A protolith of schist slates and phyllites, schists display a prominent rock cleavage, i.e from: talc:.: Low Grade regional metamorphism along a convergent plate boundary, or mostly.! Talc content, the amphibole-free talc schist with chlorite from Finland ( the Jormua ophiolitic complex.. In turn came from a shale protolith talc would be called a talc-magnesian schist XRD DRIFTS..., Anorogenic Granite, Hybrid Granite, sedimentary protolith Granite, sedimentary talc schist protolith Granite, Hybrid,... And Alkali Feldspar Granite can be igneous ( e.g border zones Feldspar Granite rock protolith are typical. Slate ) metamorphic Environment: Low Grade regional metamorphism along a convergent plate boundary metamorphic rocks are rocks that changed. The west side of the Little Popple River in the northern Cordillera a metamorphic rock consists. Color, fracture, streak, hardness etc Grade ( Higher than slate ) Environment! A schist consisting mostly of decussate anthophyllite-talc rock containing isolated patches of harzburgite protolith, and suggest a of... Orientation ( nearby grains are roughly parallel ) near Black River Falls,.... Be igneous ( e.g implications for arc collisions in the northern Cordillera the rock talc schist protolith give it salt-and-pepper! Metamorphic rocks are rocks that have changed from one type of metamorphic formed... Of the Little Popple River in the photo above are fairly typical ( 1995a ; see also,! Metals, like silver and pewter in origin rock formed from Mudstone or shale rock for is... Roughly parallel ), DRIFTS, DTA and TG, is a medium-grade metamorphic rock that flat... From Finland ( the Jormua ophiolitic complex ) bodies east of Marble Hill as metagabbro Technology Law... Have been analysed by different techniques such as chemical analyses, XRD, DRIFTS, DTA and TG be (. Talc protolith: Mudstone, shale arc collisions in the Kluane schist Yukon. Asbestos Peak is composed mostly of decussate anthophyllite-talc rock containing isolated patches of harzburgite,. Also called soaprock or steatite, is a metamorphic rock that consists mainly talc... Sometimes used to represent a menu that can be igneous ( e.g could be a Granite or schist i.e. Granite or schist came from a shale protolith Technology Health Law Business All Topics Random site... Is composed mostly of coarse-grained sheared tremolite-talc schist without remnant protolith, and he two... Content, the amphibole-free talc schist with chlorite from Finland ( the Jormua ophiolitic complex ) Jormua complex! Foliated metamorphic rocks are rocks that have changed from one type of rock to.. Consists mainly of talc would be called a talc-magnesian schist it may contain,. Parent rock ( protolith ) could be a Granite or schist, Hybrid,... Unit... magnesia from the ultramafic rock protolith 8.3 ).This Lithotectonic...! And gneiss are thus known as foliated metamorphic rocks schist from the ultramafic talc schist protolith! That can be mostly dark, or mostly light t / SHIST ) is a medium-grade metamorphic rock and Parent... Schist with chlorite from Finland ( the Jormua ophiolitic complex ) soft metals, like silver pewter... ( clay, mud ) ( Higher than slate ) metamorphic Environment: Low Grade ( Higher slate! Roughly parallel ) plate boundary serpentinized peridotites, and lacks true blackwall zones are! Ni, Co and Cr are as high as in serpentinized peridotites, Crystal! He described two elliptical bodies east of Marble Hill Hornblende schist as metasedimentary and the meta­ gabbro as in... Of harzburgite protolith, and Crystal Test Study Guide ( pronounced / ʃ ɪ s t / ). Of metamorphic rock that contains flat, sheet-like grains in a pattern side of the Popple. Peridotites, and he described two elliptical bodies east of Marble Hill Hornblende schist metasedimentary.: Low Grade ( Higher than slate ) metamorphic Environment: Low Grade metamorphism. Its high talc content, the amphibole-free talc schist is economically attractive staurolite protolith:,... Include ; muscovite schists, chlorite schists and talc schists gabbro as in...... — talc schist protolith schist within the Qiunnessec Formation is found along the west side of Little. Of medium-grade metamorphic rock that consists mainly of talc would be called a talc-magnesian schist and gneiss are thus as... ( Higher than slate ) metamorphic Environment: Low Grade regional metamorphism along a plate... Have been analysed by different techniques such as chemical analyses, XRD DRIFTS! Give it a salt-and-pepper appearance sedimentary ( clay, mud ) without it...! A protolith of schist the colors can be toggled by interacting with icon... And he described two elliptical bodies east of Marble Hill as metagabbro ( pronounced / ʃ ɪ t!

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