
	Where results make sense

Topic: Granodiorite

In the News (Fri 27 Nov 09)

Northern Trust

Marvin Harrison

Peter Chernin

Gary Locke

Match Play

Penelope Cruz

Mickey Rourke

AR Rahman

Danny Boyle

Hugh Jackman

	Untitled (Site not responding. Last check: 2007-11-05)
		Granodiorite is typically intermediate colored with a subequal mixture of light colored sodium plagioclase/quartz, and dark colored amphibole and biotite.
		Granodiorite, like diorite, is the result of fractional melting of a mafic parent rock above a subduction zone.
		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).
	csmres.jmu.edu /geollab/Fichter/IgnRx/GranoDio-1A1.html (142 words)

	Olympus Microscopy Resource Center: Polarized Light Microscopy Gallery - Granodiorite
		An intrusive igneous rock, granodiorite often forms large masses in the roots of mountain ranges, such as the Andes.
		Indeed, granodiorite is often confused with granite, a rock with which it shares a similar appearance, texture, and composition.
		In polished form granodiorite is still occasionally utilized as an ornamental stone, but has also found use as an aggregate material for roadways.
	www.olympusmicro.com /galleries/polarizedlight/pages/granodioritelarge.html (131 words)

	Grass Valley, Gold Districts of California
		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.
		The veins of the granodiorite area are either in the granodiorite or in the adjacent greenstone, entering the granodiorite at depth.
	www.museumca.org /goldrush/dist-grassvalley.html (1018 words)

	UNFORBIDDEN GEOLOGY
		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)
		Granodiorite has a quartz content similar to granite, but has a higher felsic mineral composition of plagioclase feldspar (quartz comprises 20-60% of its felsic mineral composition with a modal composition of mafic minerals <10%).
		The granodiorites of this deposit are gradational with monumental fl granite, and sometimes tonalite and quartz monzodiorite.
	www.geocities.com /unforbidden_geology/diorite.html (2137 words)

	Geology - Sherwood Mining Corporation (Site not responding. Last check: 2007-11-05)
		The granodiorite is medium to coarse grained, massive to foliated and varies from equigranular to porphyritic (porphyroblastic).
		The foliation is caused by the alignment of mafic minerals, particularly biotite and, to a lesser extent, vague alignment of orthoclase crystals.
		In places, granodiorite conglomerates derived from debris from the in-situ breakdown of the granodiorite and immature sediments are found at the contact between the Klotassin granodiorite and the overlying Carmacks Group.
	www.sherwoodcopper.com /minto/geology (1568 words)

	Apatite - Victoria (Site not responding. Last check: 2007-11-05)
		Granodiorites - Maldon, Mt. Martha, Mt. Leinster, Harcourt, Zumstein's Crossing in the Grampians, Majorca, Oliver's Hill near Frankston, Limestone Creek, Mt. Eliza south of Frankston, Big Hill near Bendigo, Ararat, Narre Warren, Baringhup, Mt. Drummer, Tarnagulla, Powelltown, Marysville and Monbulk Creek in the Dandenongs.
		In thin sections of the Dromana and Mary ville (granodiorite) rocks they occur as inclusions in biotite plates, and must therefore have crystallized prior to the main crop of biotite.
		Crystals with similar pleochroic cores in the granite at Dromana were derived from the assimilation of hornblende diorite schlieren, and as these crystals were formed in the schlieren during the period of instability of the hornblende, when granitization was in progress, they would be xenocrystal when occurring in the granite.
	www.minsocam.org /MSA/collectors_corner/arc/apatitevic.htm (2356 words)

	Pennsylvania Geological Survey: Geologic Abstract - Springfield Granodiorite (Site not responding. Last check: 2007-11-05)
		The Springfield Granodiorite is an epidote-bearing metaluminous to weakly peraluminous pluton which intrudes the Wissahickon Formation in southeastern Pennsylvania.
		This date is similar to the age of the Arden plutonic suite, a composite pluton that intrudes the Wilmington Complex, and high T-low P metamorphism of the Wissahickon Formation and moderate pressure granulite facies metamorphism of the Wilmington Complex.
		The Silurian age of the Springfield Granodiorite and the metamorphic data suggest that an elevated thermal regime was present regionally during the Silurian.
	www.dcnr.state.pa.us /topogeo/gsaabstr/springfield.aspx (375 words)

	CGS-95 Stop 5 (Site not responding. Last check: 2007-11-05)
		The contact with the granodiorite is gently dipping and near the water level in McClure Creek.
		The granodiorite is characterized by biotite clots that define a crude lineation and have dimensions approximately 2 cm x 1 cm x 2 mm.
		It is suggested here that the granodiorite is intruded into a locally significant dextral shear zone (of late Precambrian-early Cambrian age) based on the asymmetric tear-drop shape of the pluton and the sudden "hard-right" turn (at the map scale) of the foliation as it enters the pluton.
	www.usca.edu /Geology/CGS/stop5.html (655 words)

	Butterfield Park Garden Restoration
		The bedrock of Butterfield Gardens, on the lower southern slopes of Mt. Newton, is formed of granodiorite, a kind of rock closely akin to granite.
		The light-coloured crystals are quartz and feldspar, whereas the fewer dark crystals are hornblende and biotite.
		The Mt. Newton granodiorite, together with similar rocks on Bear Hill, belongs to a suite of igneous rocks that form the backbone of Vancouver Island.
	www.islandnet.com /~butterfd/geology/geology.htm (564 words)

	McClures Beach Geology (Site not responding. Last check: 2007-11-05)
		Garnet- and sillimanite-bearing quartzofeldspathic gneiss and granofels form a septum at McClures Beach between the tonalite (Kgd) of Tomales Point and the granodiorite and granite of Inverness Ridge (Kgr) (Ross, 1977, 1978 referenced in Clark and Blake).
		There are text-book examples of cross-cutting relationships on bedrock exposures exposed in the beach south of the path down to the beach and abundant examples of large boulders with a wide variety of examples running from granitics to gneisses and almost everything in between.
		Granodiorite and granite of Inverness Ridge -- Granodiorite and granite are exposed along Inverness Ridge, where dikes and masses of aplite and alaskite are locally abundant.
	www.marin.cc.ca.us /~jim/ring/ptreyes/mcclures.html (374 words)

	Medinah Minerals, Inc. - Compliance Officer
		Surface exposures of the breccia are heavily oxidized and consist of rounded to subangular clasts of intensely altered granodiorite, cemented by a matix of crystalline quartz and limonite and iron-oxides.
		Both of these holes were drilled vertically to intersect the southern extension of the shear zone in the vicinity of a granodiorite dike, however once drilled, the location of these holes was found to be collared in the shear zone, therefore missing the hanging wall and possibly the strongest mineralized portion of the auriferous structure.
		Finally, the intersection of the granodiorite dike and the shear zone between Lines 5 and 6, at stations 400 to 500, should be tested with at least 3 drill holes, each to a minimum depth of about 200 metres.
	www.medinah-minerals.com /reports/Howe/HoweMariasLipangueReport.html (11607 words)

	3.4.14 The Ravenswood Granodiorite Complex and Lolworth Igneous Complex - EPA/QPWS
		With slow cooling the Ravenswood Granodiorite Complex was formed.
		Subsequent uplift and erosion have removed the overburden of sediments and broken through the metamorphic aureole enclosing the granodiorite.
		The coarse crystalline structure of the granodiorite allowed moisture to penetrate and initiate rapid chemical weathering.
	www.epa.qld.gov.au /nature_conservation/biodiversity/desert_uplands_strategic_land_resource_assessment/3_geomorphology/34_significant_geomorphic_features_of_the_region/3414_the_ravenswood_granodiorite_complex_and_lolworth_igneous_complex (405 words)

	Garnet and Clinozoisite from the Nightingale Mining District Rocks & Minerals - Find Articles (Site not responding. Last check: 2007-11-05)
		The granodiorite is exposed in the eastern half of the Nightingale district and is the marginal part of a large intrusive that extends for approximately 15 miles to the north.
		Both the granodiorite and the metasediments are intruded by small dikes and irregular intrusive bodies of quartz monzonite, aplites, and pegmatites.
		The contact between the metasediments and the granodiorite is usually vertical to near-vertical.
	www.findarticles.com /p/articles/mi_m0GDX/is_2_75/ai_60498492 (993 words)

	Olympus Microscopy Resource Center: Polarized Light Microscopy Gallery - Granodiorite
		An intrusive igneous rock, granodiorite often forms large masses in the roots of mountain ranges, such as the Andes.
		Indeed, granodiorite is often confused with granite, a rock with which it shares a similar appearance, texture, and composition.
		In polished form granodiorite is still occasionally utilized as an ornamental stone, but has also found use as an aggregate material for roadways.
	olympusmicro.com /galleries/polarizedlight/pages/granodioritelarge.html (131 words)

	Regency Mines
		The granodiorite pluton is a composite body with phases ranging from diorite, quartz diorite, monzonite, adamellite, through to alkaline granite and syenite.
		The surrounding Permian sedimentary rocks are predominantly fine-grained silty carbonaceous rocks, domed upwards because of the granodiorite intrusion, and dip at 20° to 50° radially outwards from the pluton.
		The common presence of hematite (and magnetite) associated with potassic alteration in the lodes is consistent with a model involving the mixing of hydrothermal fluids (derived from the granodiorite) with oxidised meteoric fluids.
	www.regency-mines.com /1.htm (2178 words)

	Union College Geology Department, Field Trip 403, Stop 3, large fragmenting xenolith, exploding xenolith, Northeastern ...
		Differential heating and expansion of the xenolith, in addition to dehydration and shear stresses, have caused the xenolith to be injected by hundreds of thin granodiorite dikelets, and to fragment into blocks and flakes.
		This is the southwest side of the xenolith, showing that the granodiorite dikelets are indeed extensions of the magma itself, visible at the top of the image.
		Here you can see the very thin and numerous dikelets of granodiorite that have been injected parallel to layering in the block, and that the block was, at some point, bent and broken.
	www.union.edu /PUBLIC/GEODEPT/hollocher/hallifax_pluton/stop_3.htm (642 words)

	I-Minerals
		The property is underlain mostly by the Thatuna granodiorite, the primary source of feldspar and quartz, and the Latah formation, a sedimentary sequence of sands and clays.
		Where the granodiorite has weathered, residual deposits of kaolin occur in place, and sedimentary deposits of kaolin occur contiguous to the Thatuna.
		Unweathered portions of the granodiorite near the ground surface are the sources of the feldspar and quartz resources reported to date.
	www.imineralsinc.com /index.cfm/content/PropertyInformation.html (733 words)

	Geomorphology of the SW Section of the Index Mining District
		The area is bound to the west by the city of Gold Bar, the east by the city of Reiter, the north by the Skykomish River, and the south by the King County line.
		The granodiorite and the metamorphic series are cut by nearly vertical shear zones with an average strike of N 45 E. The majority of the shear zones are found in the granodiorite.
		The granodiorite is the predominant rock of the Index Mining District.
	www.seanet.com /~thechecks/amgotss.html (782 words)

	Sacaton Mountains Research (Site not responding. Last check: 2007-11-05)
		Light pink mountains and blue hills are Laramide granodiorite and darker pink-red mountains are Precambrian granite [Balla, 1972].
		You can see that the granodiorite surfaces are enriched in clay and deficient in feldspar, compared to the granite surfaces.
		This is due to calcic plagioclase (more abundant in the granodiorite) weathering more quickly than alkali feldspars (more abundant in the granite).
	www.public.asu.edu /~jmichal/research/sacaton.html (504 words)

	Glasgow ePrints Service - Fluid evolution in a subvolcanic granodiorite pluton related to Fe and Pb-Zn mineralization, ...
		The granodiorite intrusion has a bell-jar form and was emplaced mainly into basement rocks, although its central part extends to the base of a subvolcanic and volcanic andesitic complex, 1.5 to 3 km below the paleosurface.
		Fluid inclusions and stable isotopes (O,H) were studied in samples of granodiorite related to the skarn and to the stockwork, from the top of the pluton down to 1,230 in in depth.
		The isotopic composition of magmatic biotite and hornblende from granodiorite indicates open magmatic degassing (deuterium depletion) during granodiorite crystallization, influenced by reequilibration to variable degrees.
	eprints.gla.ac.uk /2021 (585 words)

	7 (Site not responding. Last check: 2007-11-05)
		The primary difference between the two is that granodiorite has quartz, while diorite does not.
		Diorite has more pyroxine than granodiorite, so diorite is much darker.
		Granite has biotite, while granodiorite has hornblende and biotite as is tonalite and gabbro.
	www.ac.wwu.edu /~babcock/v25_4.html (122 words)

	Granodiorite - Wikipedia, the free encyclopedia
		Granodiorite (IPA: /ˌgɹanə(ʊ)ˈdaɪəɹaɪt, ˌgɹeɪn-/) is an intrusive igneous rock similar to granite, but contains more plagioclase than potassium feldspar.
		Mica may be present in well-formed hexagonal crystals, and hornblende may appear as needle-like crystals.
		On average the upper continental crust has the same composition as granodiorite.
	en.wikipedia.org /wiki/Granodiorite (120 words)

	Geology (Site not responding. Last check: 2007-11-05)
		Resting on top of the granodiorite is an ancient deposit of sand and gravel that formed about 60 million years ago and has since hardened into a sandstone called the Carmelo Formation.
		It is softer than the granodiorite and is easily seen along the south shore of the reserve, where it has been eroded by ocean waves to form a photogenic series of coves, crevices and shelves.
		Highly resistant to erosion, the granodiorite is responsible for the rugged coastline.
	pt-lobos.parks.state.ca.us /nathis/Geology.htm (1194 words)

	www.mineweb.net \| co_releases Eurasian Minerals Inc. - Orgatash, Kyrgyz Republic (Site not responding. Last check: 2007-11-05)
		The highlight is a continuous interval of mineralized granodiorite averaging 1.48 g/t gold over 208.3 meters, with two higher-grade subintervals of 20 meters averaging 4.52 g/t gold and 12 meters averaging 5.58 g/t gold.
		This geologic setting is favorable for the occurrence of intrusion-hosted gold deposits given the well-documented relationship between Permian-aged granite and granodiorite and gold mineralization in the Tien Shan.
		The best trench (T-1) returned a mineralized interval in granodiorite averaging 1.48 g/t gold over 208.3 meters, with higher grade sub- intervals of 20 meters averaging 4.52 g/t gold and a 12 meters averaging 5.58 g/t gold.
	www.mineweb.net /co_releases/479010.htm (726 words)

	Publications: Episodes 23-3 (Site not responding. Last check: 2007-11-05)
		The 460 Ma-old Yeniutan granodiorite intrusion is spatially and temporally associated with the Ta'ergou tungsten deposit, one of the recently explored large tungsten resources in northwest China.
		The granodiorite has a coarse-grained and pseudoporphyritic texture and is composed of variable amounts of amphibole, pyroxene, biotite, plagioclase, quartz and alkali feldspar perthite.
		The REE content of the granodiorite ranges from 141 to 241 ppm, the La/Yb ratio varies from 10 to 31, d##Eu from 0.6 to 0.8.
	www.iugs.org /iugs/pubs/epi23-3.htm (1179 words)

	[No title] (Site not responding. Last check: 2007-11-05)
		The bulk of the intrusion is represented by the concentrically zoned North Fork tonalite-granodiorite, which ranges in composition from biotite-hornblende tonalite to biotite-hornblende quartz diorite to hornblende-bearing, biotite granodiorite.
		A concentrically zoned lamprophyre body comprising lamprophyre, orbicular lamprophyric tonalite, and hornblende tonalite pegmatite is spatially associated with the North Fork intrusion.
		Observed variations in the tonalite-granodiorite series may theoretically be explained by equilibrium fractionation of a hornblende-plagioclase assemblage while minor crossovers in REE profiles may be in part due to minor fractionation of accessory minerals.
	nwdata.geol.pdx.edu /Thesis/Abstract.php?Th_ID=36 (489 words)

Try your search on: Qwika (all wikis)