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Topic: Diorite

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	Diorite Solid Surface
		Manufactured from a polymer matrix with aluminum tri-hydrate mineral filler Diorite has the beauty of natural stone yet can shaped and formed like a fine hardwood.
		Diorite's ability to manufacture solid surface in Ireland, means that the material is competitively priced over other leading brands of solid surface.
		This also allows us to provide a very responsive and fast service to the specifier and building trade.
	www.dioritesolidsurface.com (98 words)

	Diorite
		Diorite is a medium to coarse-grained intrusive igneous rock that commonly is composed of about two-thirds plagioclase feldspar and one-third dark-colored minerals, such as amphibole and/or biotite.
		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.
		The extrusive (volcanic) equivalent of diorite is andesite.
	geology.csupomona.edu /alert/igneous/diorite.htm (316 words)

	Diorite - LoveToKnow 1911
		The felspar of the diorites ranges in composition from oligoclase to labradorite, and is often remarkably zonal, the external layers being more alkaline than the internal.
		Occasionally diorites have a parallel banded or foliated structure, but these must not be confounded with the epidiorites, which are metamorphic rocks and also have a conspicuous foliation.
		Diorites must also be distinguished from hornblendic gabbros, which contain more basic felspars, rarely quartz and occasionally olivine; but the boundary lines between diorites and gabbros are admittedly somewhat vague, e.g.
	www.1911encyclopedia.org /Diorite (557 words)

	Diorite (Site not responding. Last check: )
		Diorite is a plutonic igneous rock composed of coarse grains of plagioclase feldspar and less then 40 percent hornblende and biotite, or more rarely pyroxene or olivine.
		Diorite is the plutonic equivalent of the volcanic rock andesite and is intermediate between gabbro and granite.
		Diorite occurs around margins of granite batholiths, in separate plutons, and in dikes.
	www.k12.nf.ca /sjis/rocks/sedimentary/diorite.htm (100 words)

	DIORITE (du gr. S&oiêi... - Article en ligne de l'information environ DIORITE (du gr. S&oiêi...
		Dans beaucoup de diorites le feldspath de plagioclase s'est cristallisé avant la hornblende, qui a par conséquent les contours moins parfaits et les plats irréguliers de formes qui enferment les individus brusquement formés du feldspath.
		De temps en temps les diorites ont une structure réunie ou feuilletée de parallèle, mais ceux-ci ne doivent pas être confondus avec les epidiorites, qui sont les roches métamorphiques et ont également une foliation remarquable.
		Les hornblendites diffèrent des diorites en contenant peu de feldspath, et consistent principalement en hornblende.
	encyclopedia.jrank.org /fr/DIO_DRO/DIORITE_du_gr_Soiiv_distinguer_.html (967 words)

	Diorite
		Diorite was used by both the Inca and Mayan civilizations, but mostly for fortress walls, weaponry, etc. It was especially popular with medieval Islamic builders.
		Although diorite is rough-textured in nature, its ability to take a polish can be seen in the diorite steps of St.
		Diorite is a relatively rare rock; source localities include Sondrio, Italy; Thuringia and Sassonia in Germany; Finland; Romania; central Sweden; Scotland; the Andes Mountains; the Isle of Guernsey; and the Basin and Range province and Minnesota in the USA.
	www.ufaqs.com /wiki/en/di/Diorite.htm (557 words)

	Special Report 33: Griffith Park (Site not responding. Last check: )
		The Lar pluton, composed of quartz diorite, is exposed in the Riverside block (p1.1), where it is intruded by malchite, and by basalt dikes.
		Inclusions of quartz diorite pluton in the Feliz pluton in the Mount Hollywood block and the diorite microbreccia in the Cahuenga Peak block may be parts of the Lar pluton.
		The quartz diorite in the northern half of the exposure is more intensely brecciated and finer grained than that in the southern half of the exposure.
	www.laep.org /target/technology/secondary/griffith/vft/VirtualFieldTrip/SR33LarQuartzDiorite.html (1286 words)

	diorite - Search Results - MSN Encarta
		Diorite, name given to several closely related igneous rocks, usually gray or dark gray in color.
		Oceanic crust consists of dark, dense igneous rocks, such as basalt and gabbro.
		Andesite, a dark, fine-grained volcanic rock, the extrusive equivalent of diorite.
	ca.encarta.msn.com /diorite.html (85 words)

	Science Fair Projects - Diorite
		Diorites may be associated with either granite or gabbro intrusions, into which they may subtly merge.
		It is commonly produced in volcanic arcs, and in cordilleran mountain building (subduction along the edge of a continent, such as with the Andes Mountains).
		Diorite is a relatively rare rock; source localities include Sondrio, Italy; Thuringia and Sassonia in Germany; Finland; Romania; central Sweden; Scotland; the Andes Mountains; and the Basin and Range province and Minnesota in the USA.
	www.all-science-fair-projects.com /science_fair_projects_encyclopedia/Diorite (380 words)

	News \| Gainesville.com \| The Gainesville Sun \| Gainesville, Fla. (Site not responding. Last check: )
		Diorite (IPA:) is a grey to dark grey intermediate intrusive igneous rock composed principally of plagioclase feldspar (typically andesine), hornblende, and/or pyroxene.
		In later times, Diorite was commonly used as cobblestone; today many diorite cobblestone streets can be found in England (from the Isle of Guernsey) and Scotland, and scattered throughout the world in such places as Ecuador and China.
		Diorite is a relatively rare rock; source localities include Sondrio, Italy; Thuringia and Sassonia in Germany; Finland; Romania; Northeastern of Turkey; central Sweden; Scotland; the Andes Mountains; the Isle of Guernsey; and the Basin and Range province and Minnesota in the USA.
	www.gainesville.com /apps/pbcs.dll/section?category=NEWS&template=wiki&text=diorite (566 words)

	card 4 DIORITE (Site not responding. Last check: )
		Picture 1 shows a hand sample of diorite.
		The predominant minerals of diorite include sodium-rich plagioclase feldspar (light-colored) and amphibole (dark-colored).
		These minerals give diorite its characteristic salt-and-pepper appearance.
	seis.natsci.csulb.edu /basicgeo/DIORITE/DIORITE.html (68 words)

	Olympus Microscopy Resource Center: Polarized Light Microscopy Gallery - Diorite
		Diorite may be dark gray to fl, sometimes with a greenish hue, depending on the percentage of dark minerals it contains.
		Diorite may occur independently, but is often associated with granite and gabbro intrusions, with which the rock sometimes merges.
		Diorite is utilized as a building material and as an ornamental rock, though it is not particularly high in demand, perhaps because of its dark coloration.
	www.olympusmicro.com /galleries/polarizedlight/pages/dioritesmall.html (175 words)

	Diorite (Site not responding. Last check: )
		Diorite is a plutonic igneous rock composed of coarse grains of plagioclase feldspar and less than 40 percent hornblende (see amphibole) and biotite (see mica), or, more rarely, pyroxene or olivine.
		Diorite occurs around margins of granitic batholiths, in separate plutons, and in dikes.
		It forms by the melting of rocks in the lower crust, by the assimilation of crustal rocks in basaltic magma, or as by metamorphic processes.
	ist-socrates.berkeley.edu /~eps2/wisc/diorite.html (105 words)

	Olympus Microscopy Resource Center: Polarized Light Microscopy Gallery - Diorite Gneiss
		Diorite is a crystalline igneous rock that exhibits a granular texture and is sometimes alternatively referred to as fl granite.
		Diorite gneiss chiefly consists of sodium-rich plagioclase feldspar, quartz, and hornblende, as well as minor amounts of biotite, sphene, or other accessory minerals.
		In fact one of the most famous and spectacular sculptures from that civilization, a large statue of Khafre, a king of the fourth dynasty that built the second of the three Pyramids of Giza, is composed of the material.
	www.olympusmicro.com /galleries/polarizedlight/pages/gneissdioritesmall.html (280 words)

	Special Report 33: Griffith Park
		The Vermont pluton, which is composed of quartz diorite, is intrusive into the metamorphosed gabbro-diabase-basalt complex that comprises the faulted remnants of a roof pendant in the central part of the Mount Hollywood block.
		The chilled border and the metamorphic rocks on the periphery of the are veined by irregular apophyses of quartz diorite that range in width from an eighth of an inch to several feet.A chilled border, as much as 2 inches thick, is found the sides of these apophyses.
		The thin chilled borders on the apophyses of the second intrusion and the lack of a chilled border of diorite around inclusions demonstrate that the country rock during the second stage of the intrusion had a temperature only slightly less than that of the magma.
	www.lalc.k12.ca.us /target/technology/secondary/griffith/vft/VirtualFieldTrip/SR33VermontQuartzDiorite.html (885 words)

	Diorite Data (Site not responding. Last check: )
		Description: Diorite* is a phaneritic intrusive igneous rock composed primarily of intermediate-composition plagioclase feldspar (which is commonly white), amphibole and various minor minerals such as pyroxene, biotite, a white alkalai feldspar, and perhaps a very smal l amount of quartz.
		The feldspar in diorite is generally white, while the calcium-rich plagioclase in gabbro is gray.
		The dark minerals in diorite are primarily biotite and amphibole, while in gabbro the dark minerals are dominantly pyroxene and olivine and dark Ca-plagioclase.
	www.uwm.edu /Course/422-100/Mineral_Rocks/diorite.data.html (173 words)

	What is Diorite?
		Diorite surfaces are non porous, so it resists stains because liquids cannot penetrate.
		Diorite is manufactured under vacuum as opposed to many other solid surfaces, which use an open-ended mixer.
		The advantage being Diorite is void-free, thereby leaving no space for bacteria to grow.
	www.dioritesolidsurface.com /whatis.htm (124 words)

	USGS: Geological Survey Bulletin 1359: Geology and Mineral Resources of the Northern Part of the North Cascades ...
		Light-colored quartz diorite intrusions are not common in this unit, although on the ridge west of Pierce Creek (east of Sourdough Lake) thin crisscrossed dikes of quartz diorite have produced a spectacular "breccia." The amphibole rich gneiss is also somewhat limy, and it is in this unit that the marble and calc-silicate rocks occur.
		The light-colored quartz diorite that is intimately intermixed with these layers may have been derived from an external igneous source or they may have formed during the intense metamorphism by being segregated from the gneiss itself.
		The quartz diorite is composed of 50 percent plagioclase, 30 percent quartz, 5 percent potassium feldspar, and 15 percent biotite and hornblende, as well as accessory sphene, apatite, magnetite, and zircon.
	www.cr.nps.gov /history/online_books/geology/publications/bul/1359/sec1.htm (4609 words)

	PRESS RELEASE Philex Gold Announces Results of Infill Drill Holes at the Boyongan Property (Site not responding. Last check: )
		Intensely quartz stockworked diorite porphyry was intersected from 441m to 792m depth with chalcopyrite, pyrite and trace bornite occurring as fracture fill, veinlets and disseminations.
		The porphyry clasts are cut by intense quartz stockworks with chalcopyrite+bornite infill and biotite stringers and are interpreted as possibly indicating a deeper stockworked diorite porphyry zone in the vicinity of the NW Hypogene Zone.
		From 107m to a depth of 588m potassic altered and argillic overprinted, mineralised polymict breccia, diorite porphyry, diorite breccia, basalt breccia, polymict breccia, localized hydrothermal breccia was intersected.
	www.marketwire.com /mw/release_html_b1?release_id=213100 (1987 words)

	Magma-hydrothermal gold deposits at Refugio, Maricunga Belt, Northern Chile -- John Muntean
		The earliest intrusive phases are medium-grained quartz diorite porphyries that contain 25-50% plagioclase phenocrysts, 3-7% hornblende phenocrysts, 0-5% biotite phenocrysts, and 1-5% quartz phenocrysts set in a microaplilitc groundmass of K-feldspar, quartz, and plagioclase.
		The Verde West quartz diorite porphyry is intruded by bodies of fine-grained diorite and medium-grained diorite porphyry that appear to have been emplaced simultaneously.
		The diorite porphyry is very similar to the Verde East quartz diorite porphyry except that quartz phenocrysts are rare and there are local miarolitic cavities.
	pangea.stanford.edu /research/ODEX/munt-gsn.html (1149 words)

	NationMaster - Encyclopedia: Granodiorite
		An elongated body of granodiorite is in the central portion of the district.
		Immediately east and west of the intrusion arc dark greenstones classified as metadiabase and metadiabase porphyry (so-called "porphyrites"), and continuing to the northeast are amphibolite schist, serpentine, gabbro and diorite, and slate.
		Granodiorite, granodiorite gneiss, diorite gneiss, anorthosite gneiss, gabbro gneiss, hornblende diorite, pegmatitic hornblende diorite, pegmatitic diorite, quartz diorite, granite gneiss (also diorite, spotted diorite, syenite, gabbro, fl granite, grey granite, fl and white breccia, fl and white diorite, Chephren/Khafre diorite, grey granite, monumental fl granite, porphyry, porphyritic rock, basalt, fl basalt, dolerite)
	www.nationmaster.com /encyclopedia/Granodiorite (429 words)

	Lord Hill Pegmatite, Stoneham Maine
		The probable explanation of the myrmekite is that after the consolidation of the diorite, calcium was introduced into it and calcic plagioclase formed by replacement of oligoclase.
		Locally, the diorite wall rock and some of the diorite inclusions have been impregnated with quartz, microcline, and muscovite, and are therefore granitized.
		The myrmekitic andesine to bytownite of the diorite was reacted upon by the pegmatite magma to produce oligoclase which retained the original myrmekitic quartz intergrowths.
	www.minsocam.org /msa/collectors_corner/arc/melordpeg.htm (5085 words)

	PRESS RELEASE Philex Gold Announces Results of Infill Drill Holes at the Boyongan Property (Site not responding. Last check: )
		From 81m to the final depth of depth of 605m potassic altered and argillic overprinted, mineralized polymict breccia, diorite porphyry and diorite breccia was intersected.
		From 112m to the final depth of 607m quartz stockworked potassic altered and argillic overprinted, mineralized diorite porphyry, diorite breccia, polymict breccia and localized hydrothermal breccia was intersected.
		From 206m to the final depth of 581m potassic altered and argillic overprinted, mineralized diorite porphyry, diorite breccia, polymict breccia and localized hydrothermal breccia was intersected.
	www.marketwire.com /mw/release_html_b1?release_id=141209&tsource=3 (1109 words)

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