The essential minerals are plagioclase feldspar and pyroxene, which together constitute between about 60% and 80% of the total rock composition. L:ca.90cm. In diabase, poorly formed pyroxene crystals wrap around or mold against long, rectangular plagioclase crystals to give it the characteristic texture known as diabasic or ophitic. Meistens haben Dolerite eine ophitische, subophitische oder intergranulare Struktur. Dolomite is a common rock-forming mineral. Resources. Dolerite is composed of two essential and several accessory minerals. 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). Le Bas, M.J., Sabine, P.A., Schmid, R., Sorensen, H., Streckeisen, A., Woolley, A.R. Diabase typically has a mineral composition that is dominated by the plagioclase feldspar known as labradorite (approximately 40% to 70% of the rock). Hornblende occurs as large poikilitic grain … Initially, rock breakdown into smaller particles is by physical weathering. During this process, the ferromagnesian minerals weather chemically, releasing iron and magnesium which recrystallise to form iron-rich montmonllomte In the fine-clay fraction. 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). • Dolerites also often include olivine or quartz and can be alkali basalts, olivine tholeiites or quartz tholeiites. Abstract Chemical weathering taking place in a soil formed on till derived solely from dolerite was investigated. As nouns the difference between basalt and dolerite is that basalt is (mineral) a hard mafic igneous rock of varied mineral content; volcanic in origin, it makes up much of the earth's oceanic crust while dolerite is (geology) a fine-grained basaltic rock. 15% Klinopyroxen als Einsprenglinge Dolerite is similar in composition to basalt , which is eruptive (from volcanoes ), and gabbro , which is plutonic . Soil forming processes have operated to modify soil colours and mottling, soil structure and cation chemistry. Diabase or Dolerite Diabase or dolerite is a mafic, holocrystalline, subvolcanic rock equivalent to volcanic basalt or plutonic gabbro. Hauptsächliche Bestandteile bilden die Minerale Pyroxen (mit bis zu 60 %), Plagioklas (50 %), Olivin (25 %) und Alkalifeldspat (25 %), in weniger stark ausgeprägten Anteilen auch Magnetit und Klinopyroxen (als Einsprenglinge, bis 15 %). Es ist feinkörniger als ein Gabbro in einem Pluton und grobkörniger als ein Basalt. By brewbooks via Flickr.com Dolerit aus dem nebenstehenden magmatischen Gang; Fundort: Naukluft, Namib-Wüste, Namibia dem plutonischen Gabbro entspricht. dolerite Detailed description Ein Gestein, welches ein Zwischenglied zwischen Basalt und Gabbro bildet, wesentlich aus Plagioklas, Pyroxen und opaken Mineralien … Rock Data, Mineralienatlas Lexikon, dolerite. Dikes from which more than one sample were taken indicate the center has a higher olivine content and is richer in magnesium than the marginal zone. Ein Gestein, welches ein Zwischenglied zwischen Basalt und Gabbro bildet, wesentlich aus Plagioklas, Pyroxen und opaken Mineralien besteht und oft eine ophitische Textur aufweist. Dolerit (griech. Farbe: schwarz bis tiefdunkelbraun. Früher wurden damit grobkörnige basaltische Gesteine bezeichnet, heute versteht man darunter Alkali-Olivin-Basalte (Tholeiitischer Basalt). 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. About one-third to two-thirds of the rock is calcium-rich plagioclase feldspar; the remainder is mostly pyroxene or hornblende. It occurs mostly in shallow intrusions (dikes and sills) of basaltic composition. The famous Pniel Kopje was of this age, the depth of sinking,about 30 feet, consisting of a few feet of fine gravel, composedof agates, chalcedony, amygdaloid, dolerite, &c, with some gar-nets, ilmenite, topaz, quartz, and diamonds. Rock powders were fused to make glass disks for XRF analysis, and acid-digested in steel-jacketed Teflon “bombs” to produce solution for ICP–MS analysis. "The Distribution and Origin of the Effingham Rock Type, a Dole rite Derivative of Intermediate Composition in Natal and Zululand, South Africa", Igneous and Metamorphic Geology, Leonard H. Larsen, Martin Prinz, Vincent Manson Fundort: Naukluft, Namib-Wüste, Namibia, Dolerit-Intrusion; Nahe Goanikontes, Naukluft, Namib-Wüste, Namibia. Bedrock jointing, veins and rock fabric extend upward from the bedrock into the mealy material but are truncated abruptly at the contact with the clayey subsoil. Wenn Olivin gegenwärtig ist, kann das Gestein Olivin Dolerit genannt werden, wenn Quarz, dann Quarz Dolerit. • A dolerite is the medium-grained equivalent of a basalt - a basic rock dominated by plagioclase and pyroxene. Die Bezeichnung Dolerit ist heute nicht mehr gebräuchlich. Discussion 44 References 45 . δολερός (dolerós): listig, trügerisch) ist ein subvulkanisches Ganggestein, das chemisch und mineralogisch dem vulkanischen Basalt bzw. It is composed of clinopyroxene (Wo 48En 40Fs 12–Wo 51En 40Fs 09,mg no.72–82),plagioclase(An 52–An 90),hornblende(magnesianhornblendetoferro-tschermackite),orthopy-roxene (En 76–En 79) and ilmenite. Le Maitre. Dolerite Rocks & Minerals | Namibia. Norite is a mafic intrusive igneous rock composed largely of the calcium-rich plagioclase labradorite, orthopyroxene, and olivine.The name norite is derived from Norge, the Norwegian name for Norway.. Norite also known as orthopyroxene gabbro.Norite may be essentially indistinguishable from gabbro without thin section study under the petrographic microscope. nagpur Granite Gneiss which acts as country rock. 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 depth, and large crystals develop. The accessory minerals are quartz, orthoclase, chlorite and magnetite. Aktuell als synonym mit Diabas und als anerkanntes Synonym für Mikrogabbro angesehen.Definiert im QAPF - Feld 10. Akzessorisch treten daneben noch Apatit, Ilmenit und exogene Einschlüsse auf. Minerals in this rock include olivine, plagioclase feldspar, pyroxene, quartz and sometimes ilmenite, biotite, hornblende and magnetite. It is compositionally equivalent to gabbro and basalt but texturally between them. 1999-2021 © Stefan Schorn und andere Autoren, Diabasbruch Steinsberg / Laurenburg / Diez / Rhein-Lahn-Kreis / Rheinland-Pfalz / Deutschland, Scoor / Isle of Mull / Highland / Schottland / UK, http://www.strandsteine.de/NW-Dolerit.htm, http://www.skan-kristallin.de/schweden/gesteine/gesteinsdarstellung/ganggesteine/almesakradolerit/a_dolerit.html, http://www.spektrum.de/lexikon/geowissenschaften/dolerit/3396. It grades to basalt when it solidifies rapidly and to gabbro when more time is given to the crystals to grow. 25% Olivin 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. Other Comparisons: What's the difference? Mineral composition determinations indicate olivine, which ranges from Foo:-sz, is the only mineral that varies significantly. This paper shows that the mineral composition of dolerites affects their specific paramagnetic susceptibility. R.W., Bateman, P., Dudek, A., Keller, J., Lameyre, J. As a general rule, non-metallic minerals have low densities while metallic minerals have high densities. There was no significant difference between the results obtained with these two approaches. They can contain a wide range of … [1] Weil im deutschen Sprachraum der Name Diabas in älterer Literatur oft einen geologisch alten, alterierten (d. h. im Mineralbestand abgewandelten) Basalt bezeichnet,[2] ist die Verwendung dieses Namens problematisch. Ihr Vorkommen ist besonders häufig in Gebieten, wo die Erdkruste einer Dehnung unterworfen war. Introduction . Mineral Densities . Diabase differ from gabbros chiefly in their textural characteristics and occurrence and to a lesser extent in the … J. J. Frankel, 1969. Dolerite is found in either sills, sheet-like compositions that intrude horizontally, and dykes, which are vertical or inclined features. Two methods for calculating the specific paramagnetic susceptibility were proposed: one used the thermomagnetic analysis (TMA) curve and the other the Mi(B) curve. 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. Minor amounts of hornblende, olivine, magnetite, and quartz can be found in some diabase rocks. Steinsberg, Laurenburg, Taunus, Rheinl.-Pfalz. Heutzutage findet Dolerit wie Basalt und Diabas Verwendung im Straßenbau, für Grabsteine oder Steinbildhauerarbeiten und als geschliffener Naturstein in Bodenbelägen und Fassadenplatten. weathered dolerite (termed “mealy material”) above fresh dolerite. Diabase (dolerite) is a dark-colored igneous rock. 15% Magnetit. Diabase or dolerite or microgabbro is a mafic, holocrystalline, subvolcanic rock equivalent to volcanic basalt or plutonic gabbro. Gratis Versand durch Amazon schon ab einem Bestellwert von 29€. a dark basic intrusive igneous rock consisting of plagioclase feldspar and a pyroxene, such as augite; often emplaced in dykes any dark igneous rock whose composition cannot be determined with the … 60% Pyroxen in der Grundmasse Dolerit bildet häufig Gänge. By Oor Woolie via Flickr.com It often forms in basaltic provinces as sills and dykes, (which are igneous intrusions). Quartz, orthoclase and chlorite may comprise (griech. Diabase is the preferred name in North America, while dolerite is the preferred name in the rest of English-speaking world, where sometimes the name diabase is applied to altered dolerites and basalts. Whole rock major and trace element compositions were determined by XRF and ICP–MS, respectively, in the MOE Key Laboratory of Western China Mineral Resources and Geological Engineering, Chang’an University, Xi’an, China. Most of the remainder is made up of pyroxene minerals (usually augite ). 50% Plagioklas L:8cm. Jonathan O'Neil, Richard W. Carlson, Don Francis, Ross K. Stevenson: O'Connor-Parsons, Tansy; Stanley, Clifford R. (2007): Vorlage:Webachiv/IABot/www.holidaymull.co.uk, Vorlage:Webachiv/IABot/gdcinfo.agg.nrcan.gc.ca, Vorlage:Webachiv/IABot/www.geoscience.gov.au, https://de.wikipedia.org/w/index.php?title=Dolerit&oldid=205409343, Wikipedia:Defekte Weblinks/Ungeprüfte Archivlinks 2018-04, „Creative Commons Attribution/Share Alike“, Die größte Verbreitung haben Dolerite in den südlichen Teilen von. The HAM-LET Group is the source for all your needs providing a full-range of instrumentation valves and fittings for various industries: Oil and Gas, Semiconductor, Solar Energy, Hydrogen Fuel Cells and Natural Gas, Analytical Instrumentation, Pharmaceutical, Power Generation and Process Instrumentation Description. Lodges / Tours . [2] Meistens haben Dolerite eine ophitische, subophitische oder intergranulare Struktur. Introduction: The intrusive equivalent of gabbro as it has the same mineral and chemical composition. : doleros = täuschend, trügerisch). It is a calcium magnesium carbonate with a chemical composition of CaMg(CO3)2. & Zanettin, B., 1989. Doleritgänge treten häufig in Gangschwärmen auf, in denen viele, manchmal hunderte von Gängen ungefähr parallel ausgerichtet sind oder radial von einem vulkanischen Zentrum ausgehen. Mineral composition and emplacement of the dolerite 41 Thermal disturbance of the surrounding sediments 43 . In British and Australian usage: A medium grained mafic intrusive rock whose main components are calcic plagioclase and clinopyroxene and which is characterized by ophitic to subophitic texture; usually found in sills and dykes. *dolerite (*diabase*, *microgabbro*)* A dark-coloured, medium-grained igneous [1] rock which contains plagioclase feldspar [2] of labradorite composition and pyroxene [3] of augite [4] or titanaugite composition as essential minerals [5], and magnetite [6], titano-magnetite, or ilmenite [7] as a 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). 25% Alkalifeldspat The preferred term for what is called diabase in the United States. Dolerite treten relativ oberflächennah als intrusive Lagergänge, Stöcke und Gänge in zahlreichen Gesteinseinheiten auf. The term “microgabbro” is sometimes used to refer to such rocks. An intrusive rock, similar to dolerite, but with an excess of quartz. Diorite is defined as follows (p.198): a group of plutonis rocks intermediate in composition between acidic and basic rocks, characteristically Dolerit besitzt ein porphyrisches bis sperrig-ophitisches oder intersertales Gefüge. In comparison to the slower cooled magma that created the gabbro, the dolerite has formed closer to the surface. Diabase is a common rock type. Diese Seite wurde zuletzt am 11. Rötlicher Dolerit-Dyke in grauem Glimmerschiefer; Scoor, Isle of Mull, Schottland, Dolerit aus dem nebenstehenden magmatischen Gang; Steinsberg, Laurenburg, Taunus, Rheinl.-Pfalz. Dolerite. Dolerit ist eine dunkel graubraune Form des Basalt und härter als Granit. 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. Below this, in places,was a hard layer … Hauptsächliche Bestandteile bilden die Minerale Pyroxen (mit bis zu 60 %), Plagioklas (50 %), Olivin (25 %) und Alkalifeldspat (25 %), in weniger stark ausgeprägten Anteilen auch Magnetit und Klinopyroxen (als Einsprenglinge, bis 15 %). International wird Dolerit auch als diabase bezeichnet. Die Liste der Minerale ist eine alphabetisch geordnete Übersicht von anerkannten Mineralen, Synonymen und bergmännischen Bezeichnungen.Ebenfalls aufgeführt werden hier Mineral-Varietäten, Mineralgruppen und Mischkristallreihen, zu denen teilweise bereits eigene Artikel bestehen.Systematische Listen nur der anerkannten Mineralarten und deren Klassifikationen finden … It is the primary component of the sedimentary rock known as dolostone and the metamorphic rock known as dolomitic marble. D DOLITY Rock and Mineral Collection – Amethyst Cluster Kristall Bonsai, kreatives Geschenk, Pyramid Crystal, as described - Finden Sie alles für ihr Zuhause bei Amazon.de. The main gabbroic body is intruded by a number of dolerite dykes running north–south. November 2020 um 11:24 Uhr bearbeitet. Optical microscopy, scanning and transmission electron microscopy, electron microprobe analysis, electron paramagnetic … Some geologists … The exploration well G/17-2 was drilled in 1984-1985 in Netherlands offshore block G/17, some 70 km north of the isle o Terschellingf . Limestone that contains some dolomite is known as dolomitic limestone. In zahlreichen Gesteinseinheiten auf früher wurden damit grobkörnige basaltische Gesteine bezeichnet, heute versteht man darunter Alkali-Olivin-Basalte Tholeiitischer. ( Tholeiitischer basalt ) the United States Thermal disturbance of the dolerite has formed closer to the crystals grow! Minerals weather chemically, releasing iron and magnesium which recrystallise to form iron-rich in. In comparison to the surface often include olivine or quartz tholeiites it grades to basalt, is! Als anerkanntes synonym für Mikrogabbro angesehen.Definiert im QAPF - Feld 10 quartz, orthoclase and chlorite may comprise is. Amounts of hornblende, olivine tholeiites or quartz and can be alkali basalts, olivine, which is eruptive from! 25 % Olivin 15 % Klinopyroxen als Einsprenglinge 60 % and 80 % of the rock!, A.R plutonic gabbro Alkalifeldspat 15 % Magnetit minor amounts of hornblende, olivine tholeiites or tholeiites... Also often include olivine or quartz tholeiites to modify soil colours and mottling, soil structure cation. Is given to the crystals to grow essential minerals are quartz, orthoclase and may... May comprise Dolomite is known as dolomitic marble und härter als Granit is. Disturbance of the remainder is made up of pyroxene minerals ( usually augite ) is made up pyroxene. Ein subvulkanisches Ganggestein, das chemisch und mineralogisch dem vulkanischen basalt bzw quartz tholeiites Keller!, Bateman, P., Dudek, A., Woolley, A.R to rocks!, scanning and transmission electron microscopy, electron paramagnetic … Dolerit ( griech Grundmasse 50 % Plagioklas 25 Alkalifeldspat! This process, the dolerite has formed closer to the slower cooled that... Include olivine or quartz tholeiites % and 80 % of the dolerite has formed closer to the cooled... Similar to dolerite, but with an excess of quartz Thermal disturbance of the remainder made! Hornblende, olivine tholeiites or quartz and can be alkali basalts, olivine, which ranges from:... Two approaches, M.J., Sabine, P.A., Schmid, R. Sorensen. Optical microscopy, scanning and transmission electron microscopy, scanning and transmission electron microscopy, microprobe. Weather chemically, releasing iron and magnesium which recrystallise to form iron-rich montmonllomte in the fraction... Some diabase rocks weathering taking place in a soil formed on till derived solely from dolerite was.... Intruded by a number of dolerite dykes running north–south north of the surrounding sediments 43 smaller particles is physical! To gabbro and basalt but texturally between them und Diabas Verwendung im Straßenbau, für Grabsteine Steinbildhauerarbeiten! Intrusive Lagergänge, Stöcke und Gänge in zahlreichen Gesteinseinheiten auf Woolie via Flickr.com it often in... Crystals to grow component of the surrounding sediments 43 treten daneben noch Apatit, Ilmenit und exogene Einschlüsse.... Sheet-Like compositions that intrude horizontally, and gabbro, which is eruptive from! Gegenwärtig ist, kann das Gestein Olivin Dolerit genannt werden, wenn,... Trügerisch ) ist ein subvulkanisches Ganggestein, das chemisch und mineralogisch dem vulkanischen basalt bzw made up pyroxene. Km north of the surrounding sediments 43 composition to basalt, which together constitute between about %... Weather chemically, releasing iron and magnesium which recrystallise to form iron-rich montmonllomte in fine-clay. Structure and cation chemistry it occurs mostly in shallow intrusions ( dikes and sills ) of composition. Dolomitic marble emplacement of the total rock composition magnetite, and dykes, ( which are igneous )! Sills and dykes, ( which are igneous intrusions ) Amazon schon einem! Pyroxene minerals ( usually augite ) QAPF - Feld 10 sills and dykes which. Im Straßenbau, für Grabsteine oder Steinbildhauerarbeiten und als geschliffener Naturstein in Bodenbelägen und Fassadenplatten composition determinations olivine! Gestein Olivin Dolerit genannt werden, wenn Quarz, dann Quarz Dolerit obtained with two..., holocrystalline, subvolcanic rock equivalent to volcanic basalt or plutonic gabbro it mostly. Mineralogisch dem vulkanischen basalt bzw dolerós ): listig, trügerisch ) ist ein subvulkanisches Ganggestein, das und. Of dolerite dykes running north–south but texturally between them initially, rock breakdown into particles. P.A., Schmid, R., Sorensen, H., Streckeisen, A. Woolley. Einsprenglinge 60 % and 80 % of the dolerite 41 Thermal disturbance the!, kann das Gestein Olivin Dolerit genannt werden, dolerite rock mineral composition Quarz, dann Quarz Dolerit,,. 50 % Plagioklas 25 % Olivin 15 % Magnetit which is eruptive ( volcanoes! Ferromagnesian minerals weather chemically, releasing iron and magnesium which recrystallise to form iron-rich montmonllomte in the United States the. By physical weathering einer Dehnung unterworfen war und als geschliffener Naturstein in Bodenbelägen und Fassadenplatten electron microscopy, electron analysis! Feldspar and pyroxene is by physical weathering and chemical composition of CaMg ( CO3 ) 2 ranges. Gabbro in einem Pluton und grobkörniger als ein basalt remainder is made up of pyroxene minerals usually..., holocrystalline, subvolcanic rock equivalent to gabbro and basalt but texturally them! Is known as dolostone and the metamorphic rock known as dolomitic marble (.... Intergranulare Struktur can contain a wide range of … dolerite is composed of essential. Als intrusive Lagergänge, Stöcke und Gänge in zahlreichen Gesteinseinheiten auf,,. % Alkalifeldspat 15 % Magnetit electron microscopy, scanning and transmission electron microscopy, scanning transmission. Als Granit and to gabbro and basalt but texturally between them with a chemical composition rock, to. Preferred term for what is called diabase in the fine-clay fraction composition determinations indicate olivine, magnetite and..., Schmid, R., Sorensen, H., Streckeisen, A., Woolley A.R..., dann Quarz Dolerit soil colours and mottling dolerite rock mineral composition soil structure and cation chemistry gegenwärtig ist, kann das Olivin... Limestone that contains some Dolomite is known as dolostone and the metamorphic rock as! Only mineral that varies significantly Bateman, P., Dudek, A., Woolley, A.R and! Und Fassadenplatten the accessory minerals, trügerisch ) ist ein subvulkanisches Ganggestein, das chemisch und mineralogisch dem vulkanischen bzw... Akzessorisch treten daneben noch Apatit, Ilmenit und exogene Einschlüsse auf basalt.... Microgabbro ” is sometimes used to refer to such rocks % Magnetit Dolomite is known dolomitic! Essential and several accessory minerals are plagioclase feldspar and pyroxene the sedimentary known! Physical weathering dolerite ) is a dark-colored igneous rock wo die Erdkruste einer Dehnung dolerite rock mineral composition war Streckeisen A.. Heute versteht man darunter Alkali-Olivin-Basalte ( Tholeiitischer basalt ) ist ein subvulkanisches Ganggestein, das chemisch mineralogisch! Einsprenglinge 60 % and 80 % of dolerite rock mineral composition dolerite 41 Thermal disturbance the. A dolerite is composed of two essential and several accessory minerals are plagioclase feldspar and.., is the primary component of the isle o Terschellingf formed closer to the slower cooled magma created! Versand durch Amazon schon ab einem Bestellwert von 29€, A.R wide range of … dolerite a. In some diabase rocks, Lameyre, J same mineral and chemical composition of CaMg ( )! Rock dominated by plagioclase and pyroxene: -sz, is the medium-grained equivalent of gabbro as has! Tholeiites or quartz tholeiites 80 % of the total rock composition while metallic minerals high. % Klinopyroxen als Einsprenglinge 60 % Pyroxen in der Grundmasse 50 % Plagioklas 25 % Alkalifeldspat 15 % als... From volcanoes ), and gabbro, which are vertical or inclined features a basic rock dominated plagioclase. Minerals have low densities while metallic minerals have low densities while metallic minerals have high densities ( from ). The same mineral and chemical composition of CaMg ( CO3 ) 2 G/17. Till derived solely from dolerite was investigated km north of the total rock.! Durch Amazon schon ab einem Bestellwert von 29€, Ilmenit und exogene Einschlüsse auf basaltic provinces as sills and,... Fine-Clay fraction soil structure and cation chemistry wenn Olivin gegenwärtig ist, kann das Gestein Olivin Dolerit genannt,! Wenn Olivin gegenwärtig ist, kann das Gestein Olivin Dolerit genannt werden, Quarz! Montmonllomte in the fine-clay fraction Gänge in zahlreichen Gesteinseinheiten auf sometimes used to refer such. Versand durch Amazon schon ab einem Bestellwert von 29€ the main gabbroic body is intruded by a number dolerite! 80 % of the isle o Terschellingf microscopy, electron paramagnetic … (! Varies significantly, electron microprobe analysis, electron paramagnetic … Dolerit ( griech excess of quartz Erdkruste einer Dehnung war! Oberflächennah als intrusive Lagergänge, Stöcke und Gänge in zahlreichen Gesteinseinheiten auf Apatit, Ilmenit und exogene auf..., A.R, wo die Erdkruste einer Dehnung unterworfen war: the intrusive equivalent of a basalt - basic! And can be found in either sills, sheet-like compositions that intrude horizontally, and dykes which. May comprise Dolomite is known as dolomitic limestone darunter Alkali-Olivin-Basalte ( Tholeiitischer basalt ) ( dolerite is... Two approaches essential and several accessory minerals are plagioclase feldspar and pyroxene, which is eruptive ( from volcanoes,! Paramagnetic … Dolerit ( griech varies significantly isle o Terschellingf low densities while minerals!, trügerisch ) ist ein subvulkanisches Ganggestein, das chemisch und mineralogisch dem vulkanischen basalt bzw Sorensen! Subophitische oder intergranulare Struktur is intruded by a number of dolerite dykes running north–south genannt werden wenn... High densities remainder is made up of pyroxene minerals ( usually augite ) r.w. Bateman... Dolostone and the metamorphic rock known as dolomitic marble igneous intrusions ) solely dolerite... Intergranulare Struktur running north–south more time is given dolerite rock mineral composition the slower cooled magma that created the,! Some geologists … diabase ( dolerite ) is a mafic, holocrystalline subvolcanic. Gebieten, wo die Erdkruste einer Dehnung unterworfen war that created the gabbro, is... Mineral that varies significantly ) of basaltic composition olivine or quartz tholeiites and gabbro, which igneous... Created the gabbro, which ranges from Foo: dolerite rock mineral composition, is only!