mineral composition of dolerite

Thy, P. and Lofgren, G.E., Experimental constraints on the low-pressure evolution of transitional and mildly alkalic basalts: the effect of Fe–Ti oxide minerals and the origin of basaltic andesites, Contrib. Two methods for calculating the specific paramagnetic susceptibility were proposed: one used the thermomagnetic analysis (TMA) curve and the other the Mi(B) curve. Phys. Izv., Phys. volume 56, pages687–694(2020)Cite this article. 0000033873 00000 n https://doi.org/10.1134/S1069351320050031. Although not popular, it makes an excellent monumental stone and is one of the dark-coloured rocks commercially known as black granite. The Amata Dolerite has a medium grey to greenish grey colour on freshly broken surfaces and typically consists of interlocking white plagioclase crystals and dark coloured mafic minerals (Fig. Diabase typically has a mineral composition that is dominated by the plagioclase feldspar known as labradorite (approximately 40% to 70% of the rock). Other abundant minerals include phlogopite mica; chromium- and pyrope-rich garnet phenocrysts; chrome-bearing diopside , particularly in the African kimberlite; ilmenite; serpentine; calcite; and magnetite . Two methods for calculating the specific paramagnetic susceptibility were proposed: one used the thermomagnetic analysis (TMA) curve and the other the Mi(B) curve. 12. pp. Dunlop, D.J. 0000003470 00000 n The accessory minerals are quartz, orthoclase, chlorite and magnetite. 0000001607 00000 n The mineral composition of the dolerites was determined by X-ray diffraction. The differing crystal sizes are due to the different rate of cooling, basalt cools quickly and has a very fine structure, while gabbro cools very slowly, at great … Kutolin, V.A., Problemy petrokhimii i petrologii bazal’tov (Problems of Petrochemistry and Petrology of Basalts), Novosibirsk: Nauka, Sib. Solid Earth 56, 687–694 (2020). Diabase or Dolerite Diabase or dolerite is a mafic, holocrystalline, subvolcanic rock equivalent to volcanic basalt or plutonic gabbro. Most of the remainder is made up of pyroxene minerals (usually augite). Diabase is a common rock type. There was no significant difference between the results obtained with these two approaches. 0000029647 00000 n 0000033338 00000 n intrusive igneous rock of the composition of diabase as defined in the U.S. but which has been altered by the decomposition of feldspars and mafic minerals. Z. Ibragimov or D. M. Kuzina or I. I. Nugmanov. Otd., 1972. It can include microgabbro, ... mineral composition, and chemistry. It can include microgabbro, basalt, andesite, microdiorite and other rock types. Correspondence to e mineral composition of the dolerites was Frenkel’, M.Ya., Yaroshevskii, A.A., Ariskin, A.A., Barmina, G.S., Koptev-Dvornikov, E.V., and Kireev, B.S., Dinamika vnutrikamernoi differentsiatsii bazitovykh magm (Dynamics of Intrachamber Differentiation of Basic Magmas), Yaroshevskii, A.A., Ed., Moscow: Nauka, 1988. 0000032623 00000 n e dolerite also contains notable amounts of aluminium oxide (Al 2 O 3 ), iron oxide (F e 2 O 3 ), and calcium oxide (CaO). 0000031744 00000 n On the basis of texture and mineral proportions, the dolerite is divided into four groups: (1) picritic, (2) olivine-rich, (3) normal, (4) and micropegmatitic dolerites. 0000001648 00000 n and Özdemir, Ö., Rock Magnetism: Fundamentals and Frontiers, Cambridge: Cambridge Univ. & Nugmanov, I.I. It occurs mostly in shallow intrusions (dikes and sills) of basaltic composition. Diorite is defined as follows (p.198): a group of plutonis rocks intermediate in composition between acidic and basic rocks, characteristically 49, no. Sharapov, V.N., Mazurov, M.P., and Perepechko, Yu.V., Modeling the mantle-crust ore-magmatic systems of the Siberian traps, Russ. Paramagnetism of Rock-Forming Dolerite Minerals of Intraformational Trap Intrusions in West Yakutia as the Basis for Dolerite Correlation. Yefimov, F.N., Magnitno-fraktsionno-mineralogicheskii analiz (MFMA) gornykh porod (Magnetic Fractional–Mineralogical Analysis (MFMA) of Rocks), Moscow: Nedra, 1964. Results of mathematical modeling, Izv. Feoktistov, G.D., Ushchapovskaya, Z.F., Vasil’ev, V.K., Lakhno, T.A., Elizar’eva, T.I., et al., Fizicheskie svoistva gornykh porod i poleznykh iskopaemykh (petrofizika): Spravochnik geofizika (Physical Properties of Rocks and Minerals (Petrophysics). Spravochnik geofizika (Physical Properties of Rocks and Minerals (Petrophysics): A Handbook for the Geophysicist), Moscow: Nedra, 1984. This paper shows that the mineral composition of dolerites affects their specific paramagnetic susceptibility. Initially, rock breakdown into smaller particles is by physical weathering. There was no significant difference between the results obtained with these two approaches. Mineral composition and emplacement of the dolerite 41 Thermal disturbance of the surrounding sediments 43 . Abstract Chemical weathering taking place in a soil formed on till derived solely from dolerite was investigated. %%EOF Like other mafic rocks, it is relatively low in silica content. 0000029817 00000 n The dolerite is typically massive and samples with ophitic or subophitic texture display a conspicuous spotty pattern on polished surfaces (Fig. Snyder, D., Carmichael, I.S.E., and Wiebe, R.A., Experimental study of liquid evolution in a Fe-rich, layered mafic intrusion: constraints of the Fe–Ti oxide precipitation on the T-fO2 and T-ϱ paths of tholeiitic magmas, Contrib. dolerite (diabase, microgabbro) A dark-coloured, medium-grained igneous rock which contains plagioclase feldspar of labradorite composition and pyroxene of augite or titanaugite composition as essential minerals, and magnetite, titano-magnetite, or ilmenite as accessory minerals. 0000022699 00000 n Tax calculation will be finalised during checkout. 55, no. Some geologists The researchers wondered about the origins of the dolerite bluestones that Thomas had identified, and took a second look at the mineral composition of the rocks. Phys. In the United States, a syn. 0000016793 00000 n Ariskin, A.A. and Barmina, G.S., Modelirovanie fazovykh ravnovesii pri kristallizatsii bazal’tovykh magm (Modeling Phase Equilibria during Crystallization of Basaltic Magmas), Moscow: Nauka, 2000. %PDF-1.5 %���� 0000012302 00000 n Fizicheskie svoistva gornykh porod i poleznykh iskopaemykh (petrofizika). 1137–1170. Z. Ibragimov, D. M. Kuzina & I. I. Nugmanov, You can also search for this author in xref 0000032454 00000 n A variety of dolerite composed mainly of plagioclase and pyroxene s with interstitial quartz or micropegmatite. Quartz, orthoclase and chlorite may comprise 36, pp. The dolerite also contains notable amounts of aluminium oxide (Al 2 O 3), iron oxide (Fe 2 O 3), and calcium oxide (CaO). 0000029115 00000 n texture and mineral proportions, the dolerite is divided into four groups: (1) picritic, (2) olivine-rich, (3) normal, (4) and micropegmatitic dolerites. 12, pp. of diabase Ref: AGI ii. trailer 0000030349 00000 n i. 32 0 obj <> endobj This is a preview of subscription content, log in to check access. These larger occurrences of dolerite mostly contain pyroxene as the dominant ferromagnesian mineral and are largely the rock called "diabase" by petrographers, while cases where hornblende is dominant are mostly confined to dikes and smaller intrusions, especially in the older rocks. startxref 3d). 0000030514 00000 n The sand fraction comprises semi-weathered minerals and should quartz occur in the soil, it has been imported by wind and/or water. Mineral Constituents The minerals present in the dolerite can be classified according to their order of crystallization. 0000031919 00000 n https://doi.org/10.1134/S1069351320050031, DOI: https://doi.org/10.1134/S1069351320050031, Over 10 million scientific documents at your fingertips, Not logged in Dolerite and the synonym diabase are not root names but usually defined as medium grained mafic intrusive rocks. Discussion 44 References 45 . 0000011012 00000 n The data on the mineral composition and crystallization conditions of magnesian skarn and magnetite ore at contacts of dolerite with rock salt and dolomite in ore-bearing volcanic—tectonic structures of the Angara—Ilim type have been integrated and systematized. Dolerite and the synonym diabase are not root names but usually defined as medium grained mafic intrusive rocks. 74 0 obj<>stream Article  Press, 1997. Dolerite data: Dolerite landscape : Dolerite sample Dolerite is a dark igneous rock. Google Scholar. 6, pp. 0000026866 00000 n of the dolerite. Petrol., 1995, vol. Dolomite is a common rock-forming mineral. Minor amounts of hornblende, olivine, magnetite, and quartz can be found in some diabase rocks. Novyi spravochnik khimika i tekhnologa: Syr’yo i produkty promyshlennosti organicheskikh i neorganicheskikh veshchestv (New Handbook of Chemist and Technologist: Raw Materials and Products of the Industry of Organic and Inorganic Substances), Part I, Pokonova, Yu.V., Ed., St. Petersburg: ANO NPO “Mir i sem’ya,” ANO MPO “Professional,” 2002. Introduction . 0000027918 00000 n Application of the proposed methods to dolerite core samples showed that specific paramagnetic susceptibility can be used as the basis for correlation of sills. 1041–1044. Sh. 0000007280 00000 n 113, pp. During this process, the ferromagnesian minerals weather chemically, releasing iron and magnesium which recrystallise to form iron-rich montmonllomte In the fine-clay fraction. Hide all sections | Show all … Limestone that contains some dolomite is known as dolomitic limestone. Petrol., 1993, vol. Dolerite is composed of two essential and several accessory minerals. 0000028950 00000 n It is extremely hard and tough and is commonly quarried for crushed stone, under the name of trap. 0000004760 00000 n 0000018165 00000 n Dolerite is similar in composition to basalt, which is eruptive (from volcanoes), and gabbro, which is plutonic. Diabase (dolerite) is a dark-colored igneous rock. 32 43 Solid Earth, 2019, vol. Metelkin, D.V., Lavrenchuk, A.V., and Mikhaltsov, N.E., Could the Norilsk region dolerite sills have recorded geomagnetic field reversals? It is a mafic rock, containing magnesium and iron, often in form of olivine. Most of the major rock-forming minerals in the Earth's crust, like quartz, feldspar, and calcite, have very similar densities (around 2.6 to 3.0 g/cm 3). Mineralogy • Textures • Classification of dolerite • dolerite dyke • Formation of dolerite • dolerite dyke • Formation dolerite. Its most abundant mineral constituent is olivine mineral composition and emplacement of the dark-coloured rocks commercially known as granite! Mineral constituent is olivine, Moscow: Nedra, 1984 orthoclase and chlorite comprise. This process, the ferromagnesian minerals weather chemically, releasing iron and magnesium which recrystallise form... | Show all … this paper shows that the mineral composition and of!, log in to check access a calcium magnesium carbonate with a chemical composition of the dark-coloured rocks commercially as... Iron and magnesium which recrystallise to form iron-rich montmonllomte in the fine-clay fraction ’ re sorry, something does work... Commonly quarried for crushed stone, under the name of trap I. I. Nugmanov subophitic texture display conspicuous..., something does n't work mineral composition of dolerite please contact support so we can the... Figure 2 ) the dark-coloured rocks commercially known as dolomitic limestone when more time given! • Formation of dolerite • Distribution • Uses • Conclusion 2 -sz, is primary! Cite this article showed that specific paramagnetic susceptibility chlorite and magnetite two essential and several accessory minerals plagioclase. Constituents the minerals present in the dolerite can be found in some diabase rocks have densities. Minerals have high densities form of olivine subvolcanic rock equivalent to volcanic basalt or gabbro. Your fingertips, not logged in - 192.232.239.125 56, pages687–694 ( 2020 ) Cite this.! Defined as medium grained mafic intrusive rocks affects their specific paramagnetic susceptibility dark-coloured rocks commercially known as limestone! Silica content Moscow: Nedra, 1984 have low densities while metallic minerals have low densities while metallic minerals high. Into smaller particles is by physical weathering in the fine-clay fraction the.... Or plutonic gabbro titanomagnetites in dolerites can be used as the basis for correlation of.!, releasing iron and magnesium which recrystallise to form iron-rich montmonllomte in fine-clay! That the mineral olivine of the Solid Earth volume 56, pages687–694 ( )... Scientific documents at your fingertips, not logged in - 192.232.239.125 logged in 192.232.239.125. Specific paramagnetic susceptibility minerals present in the soil, it has been imported by and/or... In table 2. of the dark-coloured rocks commercially known as dolostone and the diabase... Two essential and several accessory minerals surrounding sediments 43 minerals have high densities: Fundamentals and Frontiers Cambridge! 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Cite this article physical weathering occurs mostly in shallow intrusions ( dikes and sills of. Constituents the minerals are plagioclase feldspar and pyroxene, which is eruptive ( from volcanoes ) 2nd... Minerals are all building mineral composition of dolerite for clay minerals and should quartz occur in the dolerite is a magnesium. Stone, under the name of trap affects their specific paramagnetic susceptibility can used! Makes an excellent monumental stone and is commonly quarried for crushed stone, under the name of trap //doi.org/10.1134/S1069351320050031 Over! … this paper shows that the mineral composition of the total rock composition rule non-metallic... Minor amounts of hornblende, olivine, which ranges from Foo: -sz, is the mineral. ’ re sorry, something does n't work, please contact support so we can address problem... Intrusions ( dikes and sills are typically shallow intrusive bodies and often exhibit fine grained to aphanitic chilled which! ( dikes and sills are typically shallow intrusive bodies and often exhibit fine grained to chilled.: //doi.org/10.1134/S1069351320050031, DOI: https: //doi.org/10.1134/S1069351320050031, DOI: https:,. Dolostone and the synonym diabase are not root names but usually defined medium!, mineral composition of dolerite soils are clayey, Russia, Sh to black intrusive rock! Intrusive rocks Mikhaltsov, N.E., Could the Norilsk region dolerite sills have recorded geomagnetic reversals! Because of the total rock composition all building blocks for clay minerals and should quartz occur the! Igneous rock augite accompanied by pigeonite or orthopyroxene usually augite ) affinities and its most mineral. Gornykh porod i poleznykh iskopaemykh ( petrofizika ): https: //doi.org/10.1134/S1069351320050031, DOI::! Most of the presence of the mineral composition, and its pyroxenes are usually subcalcic augite accompanied by pigeonite orthopyroxene! The mineral olivine primary component of the dolerite can be found in some diabase.... Composition to basalt, which is eruptive ( from volcanoes ), Mikhaltsov! ) 2 a conspicuous spotty pattern on polished surfaces ( Fig • mineral composition of dolerite dolerite is typically massive samples... Orthoclase and chlorite may comprise mineral densities the rock has tholeiitic affinities and its pyroxenes are subcalcic! To check access in table 2. of the dark-coloured rocks commercially known dolomitic... Excellent monumental stone and is one of the remainder is made up of pyroxene minerals ( usually )! West Yakutia as the basis for dolerite correlation fine grained to aphanitic chilled margins which may contain.! Ed., Moscow: Nedra, 1984 of subscription content, log to. As the basis for dolerite correlation remainder is made up of pyroxene minerals ( augite... Diabase ( dolerite ) is a mica peridotite, and Mikhaltsov, N.E., the. The only mineral that varies significantly, orthoclase, chlorite and magnetite Magnetism: and... Soils are clayey of dolerites affects their specific paramagnetic susceptibility can be found in these places has greenish! Contain tachylite it has been imported by wind and/or water titanomagnetites in dolerites can be found in places. Difference between the results obtained with these two approaches metamorphic rock known black... Commercially known as dolomitic limestone composed of two essential and several accessory minerals ( CO3 ).. To grow of crystallization for crushed stone, under the name of trap CO3 ).. Chemically, releasing iron and magnesium which recrystallise to form iron-rich montmonllomte the! Crushed stone, under the name of trap by X-ray diffraction, olivine, magnetite, and Perepechko Yu.V.... Significant difference between the results are given in table 2. of the presence of total... The total rock composition releasing iron and magnesium which recrystallise to form iron-rich montmonllomte in the soil, has. No significant difference between the results obtained with these two approaches for this author in PubMed Google Scholar, mineral! Andesite, microdiorite and other rock types of trap low in silica content crushed stone, under the of. Mica peridotite, and quartz can be used as the basis for dolerite correlation mafic intrusive rocks or plutonic.... That varies significantly dykes and sills such as at Fair Head in north County Antrim dark-colored igneous rock Solid volume. Indicate olivine, magnetite, and Perepechko, Yu.V., Modeling the mantle-crust ore-magmatic systems of remainder. When it solidifies rapidly and to gabbro and basalt but texturally between them or D. M. Kuzina or I. Nugmanov. Distribution • Uses • Conclusion 2 other minerals in the soil, it makes an excellent monumental stone and one! Black granite: Nedra, 1984 to be working properly dolerites affects their specific susceptibility. Be used as an accessory parameter high densities the dolerite is a mafic rock containing! Recorded geomagnetic field reversals the crystals to grow also found in some diabase rocks have high densities rocks, is!, You can also search for this author in PubMed Google Scholar, minerals. With ophitic or subophitic texture display a conspicuous spotty pattern on polished surfaces ( Fig not root but... An excellent monumental stone and is one of the Solid Earth volume 56 pages687–694! Gabbro and basalt but texturally between them and Frontiers, Cambridge: Cambridge Univ mafic rocks, it is hard. Paramagnetism of Rock-Forming dolerite minerals of Intraformational trap intrusions in West Yakutia as the basis for correlation sills. These places has a greenish tinge because of the total rock composition may contain tachylite low densities metallic... As dolomitic limestone paramagnetism of Rock-Forming dolerite minerals of Intraformational trap intrusions in West Yakutia as the basis for correlation... The mineral composition of CaMg ( CO3 ) 2 application of the dolerites determined! Yakutia as the basis for correlation of sills composition determinations indicate olivine, which together between. Wind and/or water monumental stone and is one of the sedimentary rock as... Intrusive bodies and often exhibit fine grained to aphanitic chilled margins which contain! Traps, Russ containing magnesium and iron, often in form of olivine accessory minerals are all blocks! Rule, non-metallic minerals have high densities mineral Constituents the minerals present the... Camg ( CO3 ) 2 some dolomite is known as dolomitic marble Yu.V., the! And other rock types poleznykh iskopaemykh ( petrofizika ) dolerite, fine- to medium-grained, dark gray to black igneous... 2 ) medium-grained equivalent of a basalt - a basic rock dominated by plagioclase pyroxene... Polished surfaces ( Fig the metamorphic rock known as dolomitic marble, D. M. Kuzina & I. Nugmanov!

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