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Geologic units containing quartz diorite

Alabama

Uchee Complex; Hospilika Granite (Precambrian to Paleozoic)

Hospilika Granite - leucocratic, massive epidote-muscovite quartz diorite to granodiorite; weak flow banding, sharp contacts.

Arizona

Early Proterozoic granitic rocks (Early Proterozoic)

Wide variety of granitic rocks, including granite, granodiorite, tonalite, quartz diorite, diorite, and gabbro. These rocks commonly are characterized by steep, northeast-striking foliation. (1600-1800 Ma)

Early Proterozoic metavolcanic rocks (Early Proterozoic)

Weakly to strongly metamorphosed volcanic rocks. Protoliths include basalt, andesite, dacite, and rhyolite deposited as lava or tuff, related sedimentary rock, and shallow intrusive rock. These rocks, widely exposed in several belts in central Arizona, include metavolcanic rocks in the Yavapai and Tonto Basin supergroups. (1650 to 1800 Ma)

Early Tertiary to Late Cretaceous granitic rocks (Late Cretaceous to Early Tertiary)

Porphyritic to equigranular granite to diorite emplaced during the Laramide orogeny. Larger plutons are characteristically medium-grained, biotite +/- hornblende granodiorite to granite. Smaller, shallow-level intrusions are typically porphyritic. Most of the large copper deposits in Arizona are associated with porphyritic granitic rocks of this unit, and are thus named 'porphyry copper deposits'. (50-82 Ma)

Middle Miocene to Oligocene granitic rocks (Oligocene to Middle Miocene)

Granite to diorite representing solidified magma chambers that were the likely source of overlying and nearby volcanic rocks of map unit Tv. The granitic rocks are typically equigranular and fine- to medium-grained. (14-26 Ma)

Middle Proterozoic granitic rocks (Middle Proterozoic)

Mostly porphyritic biotite granite with large microcline phenocrysts, with local fine-grained border phases and aplite. Associated pegmatite and quartz veins are rare. This unit forms large plutons, including the Oracle Granite, Ruin Granite, granite in the Pinnacle Peak - Carefree area northeast of Phoenix, and several bodies west of Prescott. (1400-1450 Ma)

Proterozoic granitic rocks (Proterozoic)

Undivided Early and Middle Proterozoic granitic rocks (units Xg and Yg). (1400-1800 Ma)

California

Cenozoic (Tertiary) granitic rocks, unit 2 (Catalina Island) (early Miocene)

Cenozoic (Tertiary) granitic rocks--quartz monzonite, quartz latite, and minor monzonite, granodiorite, and granite; found in the Kingston, Panamint, Amargosa, and Greenwater Ranges in southeastern California.

Mesozoic granitic rocks, unit 1 (Salinian Block) (Early to Late Cretaceous)

Mesozoic granite, quartz monzonite, granodiorite, and quartz diorite

Mesozoic granitic rocks , unit 2 (Peninsular Ranges) (Middle Jurassic to Late Cretaceous)

Mesozoic granite, quartz monzonite, granodiorite, and quartz diorite

Mesozoic granitic rocks, unit 3 (Sierra Nevada, Death Valley area, Northern Mojave Desert and Transverse Ranges) (Permian to Tertiary; most Mesozoic)

Mesozoic granite, quartz monzonite, granodiorite, and quartz diorite

Mesozoic granitic rocks, unit 4 (Klamath Mountains and Northern Sierra Nevada) (Devonian)

Mesozoic granite, quartz monzonite, granodiorite, and quartz diorite

Mesozoic granitic rocks, unit 5 (Klamath Mountains) (Jurassic to early Cretaceous)

Mesozoic granite, quartz monzonite, granodiorite, and quartz diorite

Paleozoic and Permo-Triassic granitic rocks, unit 1 (Eastern Klamath Mountains) (Permian)

Paleozoic and Permo-Triassic granitic rocks in the San Gabriel and Klamath Mountains

Paleozoic and Permo-Triassic granitic rocks unit 2 (San Gabriel Mountains) (Late Triassic)

Paleozoic and Permo-Triassic granitic rocks in the San Gabriel and Klamath Mountains

Connecticut

Dioritic phase [of Preston Gabbro] (Middle Ordovician or older)

Dioritic phase [of Preston Gabbro] - Medium- to dark-gray, streaked or speckled, medium-grained diorite and quartz diorite, gneissic where sheared near contact, composed of plagioclase, hornblende, and biotite, and locally quartz and relic pyroxene.

Idaho

Diorite, gabbro, and granite; Jurassic to Triassic plutons; western Idaho, Blue Mountains island-arc complex (Jurassic to Triassic)

Lower Mesozoic intrusions; localized near the Snake Canyon of western Idaho.

Gabbro, diorite, quartz diorite, aplite; Late to Middle Proterozoic sills injected into sedimentary strata of the Belt Basin; northern Belt province (Late to Middle Proterozoic)

Younger Precambrian dioritic and amphibolitic sills of northern Idaho; basaltic or mafic; as gabbro.

Intermediate intrusions; mostly Late Cretaceous dioritic to granodioritic plutons of the Idaho batholithic assemblage (Cretaceous)

Cretaceous plutons; intermediate; as granodiorite or diorite; probably includes unmapped older and younger crystalline bodies.

Intrusive rocks: mostly Late Cretaceous granodioritic to granitic plutons of the Idaho batholithic assemblage, but including some Eocene intrusions; northern Idaho and Atlanta batholith (Cretaceous to Eocene)

Cretaceous plutons; probably includes unmapped older and younger crystalline bodies.

Metamorphosed granodiorite, quartz monzonitek tonalite, quartz diorite; mostly Cretaceous orthogneiss and migmatite; northern and Atlanta batholith; margins of Bitterroot and Atlanta batholiths (Cretaceous)

Metamorphosed granitic intrusive rock; associated with pluton margins and stress areas.

Quartz diorite, metasedimentary rock, metavolcanic rock, and migmatite; Cretaceous to Jurassic plutons in Triassic to Permian metamorphic host rocks, undivided; western Idaho (Cretaceous to Permian)

Mixed, highly altered and migmatitic rocks; derived from imbrication and dynamic events

Quartz diorite, tonalite, granodiorite, orthogneiss, migmatite; Cretaceous to Jurassic quartz dioritic plutons; western Idaho, Blue Mountains island-arc complex (Early Cretaceous to Late Jurassic)

Lower Cretaceous to Upper Jurassic intrusions in west-central Idaho.

Quartz monzodiorite, monzogranite, granodiorite, monzonite, diorite; Eocene phaneritic to porphyro-aphanitic intrusions of the quartz monzodiorite suite; Challis magmatic belt (Eocene)

Eocene intrusions of intermediate (mafic to felsic) composition

Syenite, quartz syenite, monzodiorite, quartz diorite, gabbro, pyroxenite, and hornblendite; Late Proterozoic plutons; east-central Idaho (Late Proterozoic)

Younger or Intermediate Precambrian age intrusive rock undifferentiated.

Massachusetts

Belchertown Complex (Devonian)

Belchertown Complex (intrudes De) - Intrusive breccia, mafic and ultramafic fragments in quartz diorite matrix.

Biotite-hornblende diorite and quartz-bearing diorite (Devonian)

Biotite-hornblende diorite and quartz-bearing diorite - Mostly foliated; intrudes Dl.

Quartz diorite (Precambrian to Phanerozoic)

Quartz diorite - Mostly nonfoliated.

Straw Hollow Diorite and Assabet Quartz Diorite undifferentiated (Silurian)

Straw Hollow Diorite and Assabet Quartz Diorite undifferentiated - Gray, medium-grained, slightly-foliated biotite-hornblende diorite and quartz diorite. Intrudes OZn.

Maryland

Georgetown Mafic Complex (Late Precambrian (?) - Early Paleozoic )

Georgetown Mafic Complex - Poorly exposed complex of tonalite, dark quartz diorite, gabbro, amphibolite, and undifferentiated basic rocks.

Norbeck Quartz Diorite (Cambrian)

Norbeck Quartz Diorite - Ranges from weakly foliated quartz diorite to strongly gneissic and schistose rock with recrystallized textures; more massive rocks have igneous textures; age 510 +/- 10 m.y. * by radiogenic dating.

Port Deposit Gneiss (Paleozoic)

Port Deposit Gneiss - Moderately to strongly deformed intrusive complex composed of gneissic biotite quartz diorite, hornblende-biotite quartz diorite, and biotite granodiorite; all rocks foliated and some strongly sheared; age 550 +/- 50 m.y. * by radiogenic dating.

Quartz Gabbro and Quartz Diorite Gneiss (Paleozoic)

Quartz Gabbro and Quartz Diorite Gneiss - Mixed rock zone of greenish-black, uralitized, quartz-bearing gabbro to dark gray, weakly gneissic, pyroxene-hornblende-biotite quartz diorite.

Relay Quartz Diorite (Early Paleozoic - Late Precambrian (?))

Relay Quartz Diorite - Intensely foliated, fine-grained, light colored; ranges from quartz diorite to albite granite; age 550 +/- 50 m.y. * by radiogenic dating.

Maine

Cambrian quartz diorite (Cambrian)

Cambrian biotite quartz diorite

Cretaceous quartz diorite - gabbro/diorite/ultramafic rocks (Cretaceous)

Cretaceous quartz diorite - gabbro/diorite/ultramafic rocks - Cretaceous biotite quartz diorite and gabbro/diorite/ultramafic rocks

Devonian gabbro/diorite/ultramafic rocks - quartz diorite (Devonian)

Devonian gabbro/diorite/ultramafic rocks - quartz diorite - Devonian gabbro/diorite/ultramafic rocks to biotite quartz diorite - gabbro, diorite, ultramafic rocks, biotite monzodiorite, biotite syenite, and biotite quartz diorite.

Devonian granite-quartz diorite (Devonian)

Devonian granite-quartz diorite: biotite granite, biotite granodiorite, biotite tonalite, biotite quartz syenite, biotite quartz monzodiorite, and biotite quartz diorite.

Devonian granodiorite - quartz diorite (Devonian)

Devonian granodiorite - quartz diorite - Devonian biotite granodiorite to biotite quartz diorite - biotite granodiorite, biotite tonalite, biotite quartz syenite, biotite quartz monzodiorite, and biotite quartz diorite.

Devonian quartz diorite (hornblende accessory mineral) (Devonian)

Devonian quartz diorite (hornblende accessory mineral) - Devonian hornblende-biotite quartz diorite

Devonian quartz monzodiorite - quartz diorite (pyroxene plus hornblende accessory mineral) (Devonian)

Devonian quartz monzodiorite - quartz diorite (pyroxene plus hornblende accessory mineral) - Devonian pyroxene-hornblende-biotite quartz monzodiorite to quartz diorite - pyroxene-hornblende-biotite quartz monzodiorite and pyroxene-hornblende-biotite quartz diorite.

Devonian quartz monzodiorite - quartz diorite (pyroxene plus hornblende accessory mineral) (Devonian)

Devonian quartz monzodiorite - quartz diorite (pyroxene plus hornblende accessory mineral) - Devonian pyroxene-hornblende quartz monzodiorite and quartz diorite - pyroxene-hornblende-biotite quartz monzodiorite, and pyroxene-hornblende-biotite quartz diorite

Ordovician quartz diorite (hornblende accessory mineral) (Ordovician)

Ordovician quartz diorite (hornblende accessory mineral)

Montana

Tertiary dikes and sills (Phanerozoic | Cenozoic | Tertiary)

Tertiary dikes and sills: mostly granophyric rocks in west and alkalic rocks in east, but includes some quartz diorite and other rocks. These dikes and sills are in part offshoots of the Tertiary coarse-grained intrusive rocks.

North Carolina

Quartz Diorite to Granodiorite (Devonian)

Quartz Diorite to Granodiorite (390 my) - contains biotite, muscovite, and xenocrysts. Includes Whiteside Mountain, Stone Mountain, Mount Airy, Spruce Pine, and other smaller plutons.

New Hampshire

Biotite quartz diorite in northeastern New Hampshire (Early - Late Devonian)

Biotite quartz diorite in northeastern New Hampshire

Hypersthene-biotite quartz diorite and hornblende or actinolite diorite or gabbro (Early Devonian - Late Devonian)

Hypersthene-biotite quartz diorite and hornblende or actinolite diorite or gabbro - Spatially associated with Spaulding Tonalite plutons.

Kinsman Granodiorite (Early Devonian )

Kinsman Granodiorite - (Kinsman Quartz Monzonite of Billings, 1955) - Foliated granite, granodiorite, tonalite, and minor quartz diorite; large megacrysts of potassium feldspar characteristic; garnet locally abundant.

Spaulding Tonalite (Early Devonian)

Spaulding Tonalite (Spaulding Quartz Diorite of Fowler-Billings, 1949) - Weakly foliated to nonfoliated, spotted biotite quartz diorite, tonalite, granodiorite, and granite; garnet and muscovite may or may not be present.

Trondhjemite and quartz diorite in northern Jefferson dome in Gorham quadrangle (Late Ordovician)

Trondhjemite and quartz diorite in northern Jefferson dome in Gorham quadrangle.

Winnipesaukee Tonalite (Early Devonian)

Winnipesaukee Tonalite (Winnipesaukee Quartz Diorite of Billings, 1955) - Gray, massive to foliated tonalite and minor quartz diorite, granodiorite, and granite. Probably coeval with Spaulding Tonalite.

Nevada

Diorite (Jurassic to Cretaceous)

Granitic rocks (Jurassic)

GRANITIC ROCKS-Mostly quartz monzonite and granodiorite

Granitic rocks, western Nevada (Jurassic to Cretaceous)

GRANITIC ROCKS, WESTERN NEVADA (Mesozoic)-Mostly quartz monzonite and granodiorite. Inconclusively dated or not dated radiometrically

Intrusive rocks of mafic to intermediate composition (Eocene to Miocene)

INTRUSIVE ROCKS OF MAFIC TO INTERMEDIATE COMPOSITION

Oregon

Granite and diorite (Jurassic and Triassic) (Triassic to Jurassic)

Felsic to intermediate, granitoid intrusive rocks. Includes Jurassic muscovite granodiorite, hornblende gabbro, tonalite, and quartz diorite of southwest Oregon (Smith and others, 1982)

Granite and diorite (Jurassic and Triassic) (Triassic and Jurassic)

Felsic to intermediate, granitoid intrusive rocks. Includes Jurassic muscovite granodiorite, hornblende gabbro, tonalite, and quartz diorite of southwest Oregon (Smith and others, 1982)

Granitic rocks (Cretaceous and Jurassic) (Late Jurassic and Early Cretaceous)

Mostly tonalite and quartz diorite but including lesser amounts of other granitoid rocks. Potassium-argon ages determined on hornblende indicates plutons range in age from 143 to 166 Ma (Hotz, 1971)

Hypabyssal intrusive rocks (Miocene and Miocene?) (Miocene)

Hypabyssal, medium-grained, hornblende diorite and quartz diorite in small stocks and large dikes; includes intrusions of medium- to fine-grained gabbro and plugs and small stocks of medium-grained, holocrystalline, olivine andesite. Also includes medium-grained, commonly porphyritic biotite quartz monzonite and leucocratic granodiorite. Many of these intrusive bodies are moderately to intensely propylitized, as are wallrocks they intrude; locally, along shears, the rocks also are sericitized. Potassium-argon ages on several of these shallow intrusions range from about 8 Ma to about 22 Ma (Wise, 1969; Bikerman, 1970; Sutter, 1978; Power and others, 1981a, b; Fiebelkorn and others, 1983)

Intrusive rocks (Cretaceous and Jurassic) (Jurassic to Cretaceous)

Hornblende and biotite quartz diorite (tonalite), trondhjemite, granodiorite, and small amounts of norite, in batholithic masses and large dikelike bodies. Includes Bald Mountain Tonalite and Anthony Lake Granodiorite of Taubeneck (1957), tonalite and trondhjemite of Wallowa batholith and Cornucopia stock (Taubeneck, 1964; Nolf, 1966), quartz diorite intrusion in the Snake River area (Morrison, 1963), quartz diorite and minor other intrusive rocks in the Caviness quadrangle (Wolff, 1965), quartz diorite northeast of John Day and southeast of Ironside Mountain (Thayer and Brown, 1964), quartz diorite in the Sparta and Durkee quadrangles (Prostka, 1962; 1967), and granodiorite and related rocks of the Pueblo Mountains (Roback and others, 1987). Rubidium-strontium and potassium-argon ages indicate an age range from about 94 to 160 Ma (Taubeneck, 1963; Thayer and Brown, 1964; Armstrong and others, 1976)

Rhode Island

Esmond Igneous Suite - mafic/intermediate rock (Late Proterozoic)

Esmond Igneous Suite - mafic/intermediate rock - Dark-gray, purple, or black, medium- to coarse-grained rock that may contain plagioclase, quartz, clinopyroxene, hornblende, olivine, and accessory biotite, epidote, sphene, zircon, apatite, and opaque minerals; secondary chlorite, sericite, and saussurite. Massive to variably foliated. Composition includes tonalite, quartz diorite, diorite, and gabbro. Includes rock mapped formerly as quartz diorite.

gabbro/diorite (Late Proterozoic? to Devonian?)

gabbro/diorite - Dark-gray to black, fine- to medium-grained, equigranular, faintly foliated rock, composed of plagioclase, clinopyroxene, hornblende, biotite, and accessory sphene, apatite, and opaque minerals. Includes quartz diorite, diorite, and gabbro.

Scituate Igneous Suite - diorite/gabbro (Devonian)

Scituate Igneous Suite - diorite/gabbro - Fine- to medium-grained, equigranular, massive to slightly foliated rock, composed of plagioclase, hornblende, clinopyroxene, and quartz, with accessory biotite, sphene, apatite, and opaque minerals; secondary chlorite, epidote, and saussurite. Varieties include quartz diorite, diorite, and gabbro.

South Carolina

Metamorphosed quartz diorite to diorite (Early Paleozoic-Neoproterozoic)

Metamorphosed quartz diorite to diorite

Utah

Tertiary intrusive rocks in central Utah (Late Eocene to Oligocene)

Tertiary intrusive rocks in southeastern Utah (Oligocene)

Tertiary intrusive rocks in western Utah (Late Eocene to Early Miocene)

Virginia

Buckingham Complex - Quarz diorite. (Proterozoic Z-Pennsylvanian)

Buckingham Complex - Quarz diorite.

Diorite and Quartz Diorite (Proterozoic)

Diorite and quartz diorite.

Green Springs Pluton - Quartz diorite and granite. (Proterozoic Z-Pennsylvanian)

Green Springs Pluton - Quartz diorite and granite.

Melrose Granite (Cambrian)

Melrose Granite - Granite

Metatonalite (Proterozoic)

Metatonalite

Washington

Mesozoic granitic rocks, undivided (Mostly Cretaceous-Jurassic)

Granite, quartz monzonite, quartz diorite, granodiorite, and trondhjemite. Includes diorite in southeastern Washington; diorite and gabbro near Concunully in Okanogan County; gneiss, schist, and migmatites in areas of Chelan, Colville, and Okanogan batholiths. Includes high-grade metamorphic rocks of Precambrian age in Spokane area.

Pre-Carboniferous crystalline complex (Devonian)

Metahornblendite, amphibolite, gneiss, metadiorite, meta-quartz diorite, and trondhjemite. As klippes along western slope of northern Cascade Mountains.

Pre-Carboniferous intrusive rocks (Paleozoic)

Meta-quartz diorite, hypersthene diorite, and gneissose and directionless quartz diorite of eastern Skagit County. Quartz diorite and diorite in the San Juan Islands. Includes amphibolite and gneiss locally.

Pre-Upper Jurassic metamorphic rocks of the medium and high-grade zone (Early Jurassic-Triassic)

Schist, amphibolite, and minor lime-silicate rocks, marble, quartzite, and metaconglomerate.

Tertiary-Cretaceous granitic intrusive rocks (Early Tertiary-Late Cretaceous)

Granite, granodiorite, trondhjemite, and quartz diorite. Late Cretaceous and/or early Tertiary.

Tertiary dikes, sills, and small intrusive bodies (Middle to Late Tertiary)

Dikes are commonly diabase; plugs and sills are generally andesite porphyry and dacite.

Tertiary granitic rocks (Probably mostly Eocene; ranges from Miocene to Paleocene)

Granite, quartz monzonite, quartz diorite, granodiorite, and trondhjemite. Includes dacite porphyry and granite breccia near Bumping Lake, Yakima County.

Wisconsin

Quartz diorite (Early Proterozoic)

Quartz diorite - Includes Marinette Quartz Diorite of Dunbar Dome (Sims and others, 1985a) and nearby Twelve Foot Falls Quartz Diorite

Wyoming

Quartz diorite (Proterozoic | Paleoproterozoic )

QUARTZ DIORITE. Sierra Madre--Encampment River Granodiorite 4; age 1,800 Ma. Medicine Bow Mountains--Keystone Quartz Diorite 5. Hartville uplift--Diorite of Twin Hills 6.