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Artículos de revistas sobre el tema "Plutonic suite"

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Publicado: 4 de junio de 2021
Última modificación: 1 de febrero de 2022

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1

Davis, W. J., and Wouter Bleeker. "Timing of plutonism, deformation, and metamorphism in the Yellowknife Domain, Slave Province, Canada." Canadian Journal of Earth Sciences 36, no. 7 (1999): 1169–87. http://dx.doi.org/10.1139/e99-011.

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U-Pb zircon, titanite, and monazite ages for plutonic rocks are used to constrain the timing of post-2660 Ma deformational and metamorphic events in the Yellowknife Domain, southern Slave Province. Diorite and tonalite plutons of the Defeat Suite yield ages of 2628 ± 3 and 2624 ± 3 Ma, older than previous, less precise estimates for this suite of ca. 2618-2620 Ma. The Defeat Suite plutons crosscut and postdate upright F1 folds in turbidites of the ca. 2680-2660 Ma Burwash Formation. D1 deformation is therefore bracketed between 2660 and 2630 Ma. The D1 event significantly predates deposition o
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2

Greig, C. J., R. L. Armstrong, J. E. Harakal, D. Runkle, and P. van der Heyden. "Geochronometry of the Eagle Plutonic Complex and the Coquihalla area, southwestern British Columbia." Canadian Journal of Earth Sciences 29, no. 4 (1992): 812–29. http://dx.doi.org/10.1139/e92-068.

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New U–Pb, K–Ar, and Rb–Sr dates from the Eagle Plutonic Complex and adjacent map units place timing constraints on intrusive and deformational events along the southwestern margin of the Intermontane Belt. U–Pb zircon minimum dates for Eagle tonalite and gneiss (148 ± 6, 156 ± 4, and 157 ± 4 Ma) document previously unrecognized Middle to Late Jurassic magmatism and syn-intrusive deformation along the eastern margin of the Eagle Plutonic Complex and the southwestern margin of the Intermontane terrane. Widespread mid-Cretaceous (Albian–Cenomanian) resetting of K–Ar and Rb–Sr isotopic systematics
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3

Bédard, L. Paul, and John N. Ludden. "Nd-isotope evolution of Archaean plutonic rocks in southeastern Superior Province." Canadian Journal of Earth Sciences 34, no. 3 (1997): 286–98. http://dx.doi.org/10.1139/e17-026.

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The Opatica plutonic belt, Abitibi greenstone belt, and Pontiac Subprovince represent a major proportion of the southeastern Superior Province, which was formed and accreted rapidly between approximately 2.9 and 2.8 Ga. Plutons in these belts are grouped into four types: (i) trondhjemite–tonalite–granodiorite (TTG) suite (2.82–2.69 Ga), (ii) monzodiorite (MZD) suite (2.697–2.669 Ga), (iii) late alkaline granitoid (ALK) suite (2.68–2.67 Ga), and (iv) anatectic granite and monzonite (ANA) suite (2.69–2.64 Ga). The four suites are represented in all belts and show similar petrography and geochemi
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4

Azadbakht, Zeinab, Christopher E. M. McFarlane, and David R. Lentz. "Precise U-Pb ages for the cogenetic alkaline Mount LaTour and peraluminous Mount Elizabeth granites of the South Nepisiguit River Plutonic Suite, northern New Brunswick, Canada." Atlantic Geology 52 (October 24, 2016): 189. http://dx.doi.org/10.4138/atlgeol.2016.009.

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The South Nepisiguit River Plutonic Suite consists of various phases of felsic to mafic plutonic rocks of early Devonian age in northern New Brunswick. The felsic portion of this intrusive suite includes a large pluton of homogeneous, peraluminous biotite granite (the Mount Elizabeth Granite), which is flanked on its western side by the alkaline Mount LaTour Granite. New in situ and mineral separate U-Pb Laser Ablation-Inductively Coupled Plasma Mass Spectro-metry analyses of monazite and zircon grains from both sides of the suite define a crystallization age of 417.3 ± 0.96 Ma for the Mount E
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5

Puchalski, Raya C., Sandra M. Barr, and Chris E. White. "Field relations and petrology of the Trafalgar Plutonic Suite and comparisons with other Devonian granitoid plutons in the Meguma terrane, Nova Scotia, Canada." Atlantic Geology 56 (April 18, 2020): 001–17. http://dx.doi.org/10.4138/atlgeol.2020.001.

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The Trafalgar Plutonic Suite intruded metasedimentary rocks of the Goldenville and Halifax groups in the northeastern part of the Meguma terrane of southern Nova Scotia at about 374 Ma, based on previously published U–Pb and 40Ar/39Ar mineral ages. Using field and petrographic observations, the suite is divided into 20 different plutons on the combined basis of variations in grain size (fine, medium, or coarse), texture (equigranular or porphyritic) and modal mineralogy (quartz diorite/tonalite, granodiorite, monzogranite, and syenogranite). The granodiorite, monzogranite, and syenogranite plu
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6

Lindline, Jennifer, William A. Crawford, and Maria Luisa Crawford. "A bimodal volcanic–plutonic system: the Zarembo Island extrusive suite and the Burnett Inlet intrusive complex." Canadian Journal of Earth Sciences 41, no. 4 (2004): 355–75. http://dx.doi.org/10.1139/e04-009.

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The Zarembo Island volcanic rocks and the Burnett Inlet plutonic complex in central southeastern Alaska were investigated to determine if they are genetically related. The Zarembo Island volcanic suite consists of basalt, andesite, and rhyolite lava flows, which exhibit features that suggest simultaneous eruptions of mafic and felsic lavas. Five kilometres to the southeast, the broadly layered Burnett Inlet plutonic complex consists of gabbro–diorite and granite plutons that also show characteristics of contemporaneous mafic and felsic magmatism. These bimodal volcanic and plutonic rocks are s
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7

Ketchum, John WF, Sandra M. Barr, Nicholas G. Culshaw, and Chris E. White. "U-Pb ages of granitoid rocks in the northwestern Makkovik Province, Labrador: evidence for 175 million years of episodic synorogenic and postorogenic plutonism." Canadian Journal of Earth Sciences 38, no. 3 (2001): 359–72. http://dx.doi.org/10.1139/e00-085.

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New U–Pb zircon, titanite, and monazite ages reported here, along with existing age data, demonstrate that granitoid bodies in the northwestern segment of the Paleoproterozoic Makkovik Province, Labrador, are of three distinct ages. The redefined Island Harbour Bay plutonic suite consists of varied dioritic to granitic units that were syntectonically emplaced into Archean crust of the Kaipokok domain between ca. 1895 Ma and 1870 ± 2 Ma. This plutonism occurred during the early stages of the Makkovikian Orogeny in an obliquely convergent, Andean continental margin setting. The Hares Islands and
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8

Symons, D. T. A., K. Kawasaki, C. J. R. Hart, and M. J. Harris. "A paleomagnetic test for northward tectonic transport of the eastern Selwyn Basin, northern Canadian Cordillera: data from the mid-Cretaceous Ragged Pluton." Canadian Journal of Earth Sciences 45, no. 7 (2008): 860–69. http://dx.doi.org/10.1139/e08-028.

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Ragged Pluton is a member of the Tungsten Plutonic Suite in the eastern Selwyn Basin. This circular massive 97 Ma granitic pluton is ∼5 km in diameter. It intrudes deformed and metamorphosed clastic strata of the Neoproterozoic to Lower Cambrian Vampire Formation. Thermal and alternating field step demagnetization data for 216 specimens from 21 plutonic sites isolated a stable characteristic remanent magnetization (ChRM) direction at 20 sites of declination D = 325.9°, inclination I = 80.4° (α95 = 2.7°, k = 142). Thermal demagnetization and saturation remanence analysis show that the ChRM is c
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9

Cui, Yao, and J. K. Russell. "Magmatic origins of calc-alkaline intrusions from the Coast Plutonic Complex, southwestern British Columbia." Canadian Journal of Earth Sciences 32, no. 10 (1995): 1643–67. http://dx.doi.org/10.1139/e95-131.

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Major element, trace element, and rare earth element data are presented for Permian to Tertiary calc-alkaline plutonic and volcanic rocks along a transect across the southern Coast Plutonic Complex from Vancouver to Anderson Lake. Late Jurassic to Late Cretaceous plutons are divided into two compositional suites based on mineralogy: (1) the hornblende intrusive suite (tonalite, quartz diorite, diorite, and gabbro) characterized by abundant modal hornblende and little or no K-feldspar, and (2) the K-feldspar intrusive suite (mainly granite and granodiorite) containing significant modal K-feldsp
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10

Selby, David, Robert A. Creaser, and Bruce E. Nesbitt. "Major and trace element compositions and Sr-Nd-Pb systematics of crystalline rocks from the Dawson Range, Yukon, Canada." Canadian Journal of Earth Sciences 36, no. 9 (1999): 1463–81. http://dx.doi.org/10.1139/e99-058.

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Geochemical (major, trace, and rare earth elements) and isotopic (Nd, Sr, and Pb) data of the Devono-Mississippian Wolverine Creek Metamorphic Suite, mid-Cretaceous Dawson Range batholith, mid-Cretaceous Casino Plutonic Suite, and Late Cretaceous plutons provide new information on the origin and evolution of the rocks from the Dawson Range in west-central Yukon, northern Canadian Cordillera. Isotopic and other geochemical data for the Wolverine Creek Metamorphic Suite metasedimentary rocks indicate that the detrital components were derived from two distinct provenances: (1) the North America c
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11

Slaman, L. R., S. M. Barr, C. E. White, and D. van Rooyen. "Age and tectonic setting of granitoid plutons in the Chéticamp belt, western Cape Breton Island, Nova Scotia, Canada." Canadian Journal of Earth Sciences 54, no. 1 (2017): 88–109. http://dx.doi.org/10.1139/cjes-2016-0073.

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Geological mapping in the Chéticamp granitoid belt in combination with petrographic and geochemical studies and U–Pb (zircon) dating by laser ablation inductively coupled plasma mass spectrometry have resulted in major reinterpretation of the geology in the western part of the Ganderian Aspy terrane of Cape Breton Island. Nine new U–Pb (zircon) ages show that the former “Chéticamp pluton” consists of 10 separate plutons of five different ages: late Neoproterozoic (ca. 567 Ma), Cambrian–Ordovician (490–482 Ma), Ordovician–Silurian (442–440 Ma), mid-Silurian (ca. 428 Ma), and late Devonian (366
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12

Hinchey, Alana M., William J. Davis, James J. Ryan, and Léopold Nadeau. "Neoarchean high-potassium granites of the Boothia mainland area, Rae domain, Churchill Province: U–Pb zircon and Sm–Nd whole rock isotopic constraintsThis article is one of a series of papers published in this Special Issue on the theme of Geochronology in honour of Tom Krogh." Canadian Journal of Earth Sciences 48, no. 2 (2011): 247–79. http://dx.doi.org/10.1139/e10-071.

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The Boothia mainland region of the north-central Rae domain is underlain by remnants of a Neoarchean volcano sedimentary sequence dismembered by two regionally extensive Neoarchean high-potassium granitoid suites with rare occurrences of a structurally interleaved, Paleoproterozoic sedimentary cover sequence. The granitoids and their gneissic equivalents are dominated by variably deformed and metamorphosed I-type, metaluminous, polyphase, commonly porphyritic to augen, biotite ± hornblende monzogranite, and subordinate granodiorite, with rare tonalite. New geochronological results, the first f
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13

Greig, Charles J. "Jurassic and Cretaceous plutonic and structural styles of the Eagle Plutonic Complex, southwestern British Columbia, and their regional significance." Canadian Journal of Earth Sciences 29, no. 4 (1992): 793–811. http://dx.doi.org/10.1139/e92-067.

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The Eagle Plutonic Complex is an elongate north-northwest-trending body of deformed Middle to Late Jurassic and middle Cretaceous rocks which underlies the southwestern margin of the Intermontane terrane. New mapping of the complex and its country rocks, in concert with geochronometry, has defined episodes of contractional, ductile deformation in the Middle to Late Jurassic and middle Cretaceous, as well as brittle deformation in Tertiary time. Synkinematic Middle to Late Jurassic Eagle tonalite at the eastern margin of the Eagle Complex intrudes mylonitic Nicola Group rocks and structurally o
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14

Wilkin, Richard T., and Theodore J. Bornhorst. "Geology and geochemistry of granitoid rocks in the Archean Northern complex, Michigan, U.S.A." Canadian Journal of Earth Sciences 29, no. 8 (1992): 1674–85. http://dx.doi.org/10.1139/e92-132.

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The Northern complex, located in the Upper Peninsula of Michigan, is an Archean greenstone–granite terrane that lies at the southern margin of the Superior Province. The origin of the plutonic suites in the Northern complex can be interpreted within a plate tectonic model proposed for the Superior Province and related to northward-directed subduction and subsequent collision along the Great Lakes tectonic zone. The following plutonic suites are recognized based on intrusive relationships, as well as textural and compositional differences: (i) gneissic tonalite suite; (ii) foliated tonalite sui
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15

Johnston, Stephen T., James K. Mortensens, and Philippe Erdmer. "Igneous and metaigneous age constraints for the Aishihik Metamorphic suite, southwest Yukon." Canadian Journal of Earth Sciences 33, no. 11 (1996): 1543–55. http://dx.doi.org/10.1139/e96-117.

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The pericratonic Aishihik metamorphic suite occurs outboard of accreted oceanic and oceanic-arc terranes in southwest Yukon. It consists of a structurally lower unit of feldspathic quartz mica schist and a heterogeneous upper unit of carbonaceous quartzite, micaceous quartzite, marble, and metaigneous rods. The metaigneous rocks include volcanic protoliths and crystallized between 351.5 ± 2.0 and 343.8 ± 0.8 Ma, suggesting correlation of the upper unit with the Nasina assemblage. The lower unit may be correlative with the pre-Mississippian Nisling assemblage. The metaigneous rocks and Early Ju
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16

Corrigan, David, and Otto van Breemen. "U – Pb age constraints for the lithotectonic evolution of the Grenville Province along the Mauricie transect, Quebec." Canadian Journal of Earth Sciences 34, no. 3 (1997): 299–316. http://dx.doi.org/10.1139/e17-027.

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New U–Pb zircon and monazite ages on 12 samples from the Mauricie transect in Quebec provide constraints on the lithologic and tectonic evolution of the south-central Grenville Province. From lowest to highest structural levels, the Mékinac, Shawinigan, and Portneuf – St. Maurice domains are identified on the basis of protolith age, tectonic overprint, and plutonism. The structurally highest Portneuf – St. Maurice domain consists of remnants of an island arc (Montauban Group) that was deformed and metamorphosed before and during the intrusion of continental arc plutons (La Bostonnais complex).
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17

Hart, Craig J. R., John L. Mair, Richard J. Goldfarb, and David I. Groves. "Source and redox controls on metallogenic variations in intrusion-related ore systems, Tombstone-Tungsten Belt, Yukon Territory, Canada." Earth and Environmental Science Transactions of the Royal Society of Edinburgh 95, no. 1-2 (2004): 339–56. http://dx.doi.org/10.1017/s0263593300001115.

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ABSTRACTThe Tombstone, Mayo and Tungsten plutonic suites of granitic intrusions, collectively termed the Tombstone-Tungsten Belt, form three geographically, mineralogically, geochemically and metallogenically distinct plutonic suites. The granites (sensu lato) intruded the ancient North American continental margin of the northern Canadian Cordillera as part of a single magmatic episode in the mid-Cretaceous (96–90 Ma). The Tombstone Suite is alkalic, variably fractionated, slightly oxidised, contains magnetite and titanite, and has primary, but no xenocrystic, zircon. The Mayo Suite is sub-alk
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18

Hébert, Claude, Anne-Marie Cadieux, and Otto van Breemen. "Temporal evolution and nature of Ti–Fe–P mineralization in the anorthosite–mangerite–charnockite–granite (AMCG) suites of the south-central Grenville Province, Saguenay – Lac St. Jean area, Quebec, Canada." Canadian Journal of Earth Sciences 42, no. 10 (2005): 1865–80. http://dx.doi.org/10.1139/e05-050.

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In the south-central Grenville Province, Quebec, Canada, anorthosite–mangerite–charnockite–granite (AMCG) magmatism took place during four distinct episodes between 1327 and 1008 Ma. AMCG rocks crosscut several gneiss complexes composed of ~1506 Ma supracrustal rocks and massive to gneissic igneous rocks that were emplaced during two distinct episodes: ~1434 and 1393–1383 Ma. The four episodes of AMCG magmatism are (i) the 1327 ± 16 Ma labradorite-type De La Blache Mafic Plutonic Suite, (ii) the 1160–1135 Ma labradorite- and andesine-type Lac St. Jean Anorthositic Suite, (iii) a 1082–1045 Ma u
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19

Pigage, Lee C., and Robert G. Anderson. "The Anvil plutonic suite, Faro, Yukon Territory." Canadian Journal of Earth Sciences 22, no. 8 (1985): 1204–16. http://dx.doi.org/10.1139/e85-122.

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The Anvil plutonic suite consists of three phases: a peraluminous muscovite–biotite granite (Mount Mye phase) and two metaluminous to peraluminous hornblende–biotite granodiorite and minor granite intrusions (Orchay and Marjorie phases). The suite is massive or foliated, equigranular or seriate, and contains alkali-feldspar megacrysts. The Marjorie phase is characteristically porphyritic.Geochemical trends are irregular for the suite and for individual phases. High-K2O, low-CaO, and low-MgO compositions typify the silicic, calc-alkaline suite. Hornblende-bearing phases contain less SiO2, K2O,
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20

Powell, Wayne G., and Edward D. Ghent. "Low-pressure metamorphism of the mafic volcanic rocks of the Rossland Group, southeastern British Columbia." Canadian Journal of Earth Sciences 33, no. 10 (1996): 1402–9. http://dx.doi.org/10.1139/e96-105.

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Mafic volcanic rocks of the Rossland Group have been metamorphosed in the subgreenschist to lower amphibolite faciès. Subgreenschist-facies regional metamorphic rocks are subdivided into prehnite–pumpeilyite zone and prehnite–epidote zone. Fluid inclusions in two subgreenschist-facies veins yielded mean homogenization temperatures of 139 and 151 °C. Assuming a reasonable maximum temperature limit of 275 °C for the subgreenschist fades, the fluid-inclusion isochores indicate a pressure <250 MPa for regional metamorphism in the subgreenschist facies. This is consistent with the widespread occ
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21

MacIntyre, D. G., M. E. Villeneuve, and P. Schiarizza. "Timing and tectonic setting of Stikine Terrane magmatism, Babine-Takla lakes area, central British Columbia." Canadian Journal of Earth Sciences 38, no. 4 (2001): 579–601. http://dx.doi.org/10.1139/e00-105.

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New bedrock mapping completed as part of the Nechako NATMAP Project indicates that the area between Babine and Takla lakes in central British Columbia is underlain by rocks of the Early Permian Asitka, Late Triassic Takla, and Early to Middle Jurassic Hazelton volcanic-arc assemblages of the Stikine Terrane. These are cut by large composite stocks of quartz diorite, granodiorite, and quartz monzonite previously mapped as the Late Triassic to Early Jurassic Topley intrusions. New U/Pb (n = 6) and laser 40Ar/39Ar (n = 10) isotopic age dates reported in this paper suggest there are two distinct a
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22

Valley, Peter M., Gregory J. Walsh, Arthur J. Merschat, and Ryan J. McAleer. "Geochronology of the Oliverian Plutonic Suite and the Ammonoosuc Volcanics in the Bronson Hill arc: Western New Hampshire, USA." Geosphere 16, no. 1 (2019): 229–57. http://dx.doi.org/10.1130/ges02170.1.

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Abstract U-Pb zircon geochronology by sensitive high-resolution ion microprobe–reverse geometry (SHRIMP-RG) on 11 plutonic rocks and two volcanic rocks from the Bronson Hill arc in western New Hampshire yielded Early to Late Ordovician ages ranging from 475 to 445 Ma. Ages from Oliverian Plutonic Suite rocks that intrude a largely mafic lower section of the Ammonoosuc Volcanics ranged from 474.8 ± 5.2 to 460.2 ± 3.4 Ma. Metamorphosed felsic volcanic rocks from within the Ammonoosuc Volcanics yielded ages of 460.1 ± 2.4 and 455.0 ± 11 Ma. Younger Oliverian Plutonic Suite rocks that either intru
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23

Pride, Monica J., and George S. Clark. "An Eocene Rb–Sr isochron for rhyolite plugs, Skukum area, Yukon Territory." Canadian Journal of Earth Sciences 22, no. 11 (1985): 1747–53. http://dx.doi.org/10.1139/e85-184.

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A new Rb–Sr whole-rock isochron for the Skukum rhyolite is 53.3 ± 1.1 Ma with an initial ratio of 0.7053. The rhyolite forms small plugs spatially and probably genetically related to the Skukum volcanic complex in the southwestern Yukon. They were intruded into granitic rocks of the Coast Plutonic Belt. The intrusions are coeval and part of an Eocene plutonic, subvolcanic, and volcanic suite correlated with the Bennett Lake cauldron complex. The initial 87Sr/86Sr ratio matches interpretations of the tectonic evolution of Yukon Crystalline Terrane and Coast Plutonic Complex.
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24

Piercey, Stephen J., James K. Mortensen, and Robert A. Creaser. "Neodymium isotope geochemistry of felsic volcanic and intrusive rocks from the Yukon–Tanana Terrane in the Finlayson Lake Region, Yukon, Canada." Canadian Journal of Earth Sciences 40, no. 1 (2003): 77–97. http://dx.doi.org/10.1139/e02-094.

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Devonian–Mississippian felsic rocks from the Finlayson Lake region have variable geochemical and Nd isotopic characteristics that provide insights into the tectonic and metallogenic evolution of the Yukon–Tanana terrane (YTT), and the northern Cordillera. Late Devonian (~365–360 Ma) calc-alkaline and tholeiitic arc felsic rocks in the mafic-dominated Fire Lake unit yield εNd350 = –4.8 and +0.1, respectively, and have 1.49–1.94 Ga depleted mantle model ages (TDM). Devonian–Mississippian (~360–356 Ma) felsic volcanic (Kudz Ze Kayah unit, Wolverine succession) and intrusive rocks (Grass Lakes sui
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25

Jackson, V. A., O. van Breemen, L. Ootes, et al. "U–Pb zircon ages and field relationships of Archean basement and Proterozoic intrusions, south-central Wopmay Orogen, NWT: implications for tectonic assignments." Canadian Journal of Earth Sciences 50, no. 10 (2013): 979–1006. http://dx.doi.org/10.1139/cjes-2013-0046.

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New field and U–Pb zircon data from the south-central Wopmay Orogen (south of 65°N) establish crystallization ages of basement and plutonic phases and bring to the forefront questions on the architecture of the orogen. The complex and extensive >3300–2575 Ma basement domain was derived from the adjacent Slave craton. Paleoproterozoic supracrustal rocks, dominated by an extensive pelitic–psammitic sequence with basal arenite, conglomerate, and carbonate, unconformably overlie this basement. Pre- to post-kinematic Paleoproterozoic plutons intrude both basement and overlying strata and crystal
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26

Blum, Joel D. "A petrologic and Rb–Sr isotopic study of intrusive rocks near Fairbanks, Alaska." Canadian Journal of Earth Sciences 22, no. 9 (1985): 1314–21. http://dx.doi.org/10.1139/e85-135.

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Epizonal granodiorite and granite plutons intrude the northwestern portion of the Yukon Crystalline Terrane near Fairbanks, Alaska. Mineralogic, major-oxide, and trace-element studies indicate that the plutons represent a comagmatic fractionation suite. A Rb–Sr whole-rock isochron for one pluton yields an age of 90.9 ± 0.9 Ma, in agreement with previous K–Ar dating of biotite and hornblende and an initial 87Sr/86Sr ratio of 0.71238 ± 0.00014. The elevated initial 87Sr/86Sr ratio suggests that the plutons may have had a different source from that of the belt of subduction-related, mid-Cretaceou
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27

Connelly, J. N., and B. Ryan. "Late Archean evolution of the Nain Province, Nain, Labrador: imprint of a collision." Canadian Journal of Earth Sciences 33, no. 9 (1996): 1325–42. http://dx.doi.org/10.1139/e96-100.

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Archean gneisses of the Nain Province in the Nain area, Labrador, comprise narrow septa between intrusions of the Mesoproterozoic Nain Plutonic Suite. This region occupies a critical position between the northern (Saglek) and southern (Hopedale) blocks of the Nain Province, which experienced distinct thermotectonic histories until the late Archean. Field and geochronological evidence are indicative of a strong late Archean thermotectonic overprint that is absent from most of the remainder of the Nain Province. Archean gneisses were intruded by granites and mafic dykes at 2578 ± 3 and [Formula:
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28

Tettelaar, Tanya, and Aphrodite Indares. "Granulite-facies regional and contact metamorphism of the Tasiuyak paragneiss, northern Labrador: textural evolution and interpretation." Canadian Journal of Earth Sciences 44, no. 10 (2007): 1413–37. http://dx.doi.org/10.1139/e07-029.

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The Tasiuyak paragneiss at the western margin of the Nain Plutonic Suite has been subjected to two granulite-facies metamorphic events: (i) regional metamorphism during the Paleoproterozoic Torngat orogeny, and (ii) contact metamorphism due to emplacement of the Mesoproterozoic Nain Plutonic Suite. Regional metamorphism led to partial melting of pelitic rocks and the development of a locally well-preserved sequence of prograde and retrograde textures. These textures are partly controlled by bulk composition and formed in the pressure–temperature (P–T) field of the continuous reaction: biotite
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29

Cox, Simon C., and Andrew H. Allibone. "Petrogenesis of orthogneisses in the Dry Valleys region, South Victoria Land." Antarctic Science 3, no. 4 (1991): 405–17. http://dx.doi.org/10.1017/s0954102091000500.

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Granitoid gneisses intercalated with Koettlitz Group metasediments in the upper Ferrar, Taylor and Wright valleys of South Victoria Land comprise various hornblende+biotite orthogneisses and biotite orthogneisses, including the km-scale Dun and Calkin plutons. K-feldspar megacryst inclusion textures and discordant cross-cutting relationships with enclosing metasediments are interpreted as firm evidence of an intrusive origin for hornblende+biotite and biotite orthogneiss. The scale of several concordant orthogneiss bodies (including the Dun and Calkin plutons), the presence of mafic enclaves,
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30

Barr, S. M., C. E. White, N. G. Culshaw, and J. WF Ketchum. "Geology and tectonic setting of Paleoproterozoic granitoid suites in the Island Harbour Bay area, Makkovik Province, Labrador." Canadian Journal of Earth Sciences 38, no. 3 (2001): 441–63. http://dx.doi.org/10.1139/e00-086.

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Paleoproterozoic granitoid rocks in the Island Harbour Bay area (Kaipokok domain, Makkovik Province, Labrador) are divided into four separate suites on the basis of field relations, petrology, and age. The redefined Island Harbour Bay plutonic suite consists of ca. 1895–1870 Ma dioritic to granitic (mainly granodioritic and granitic) units. The rocks are variably foliated as a result of emplacement under amphibolite-facies conditions in a dextral transpressive regime during Andean-type subduction. The dominant mafic mineral is biotite, and accessory epidote, allanite, and titanite are abundant
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31

Whalen, Joseph B., Robert G. Anderson, Lambertus C. Struik, and Michael E. Villeneuve. "Geochemistry and Nd isotopes of the François Lake plutonic suite, Endako batholith: host and progenitor to the Endako molybdenum camp, central British Columbia." Canadian Journal of Earth Sciences 38, no. 4 (2001): 603–18. http://dx.doi.org/10.1139/e00-080.

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The Endako low-F granodiorite-type porphyry Mo deposit is hosted by the Triassic to Eocene Endako batholith, which comprises five temporally distinct plutonic suites, only one of which is mineralized. Pre-mineralization suites range in composition from diorite to granodiorite. The synmineralization Jurassic–Cretaceous François Lake suite includes two granodiorite- to monzogranite-bearing subsuites. Postmineralization phases include the Eocene Sam Ross Creek monzogranite. The batholith spans a silica range of 44–80 wt.% and consists of metaluminous to slightly peraluminous, low- to high-K, I-ty
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32

BITENCOURT, MARIA DE FÁTIMA, EVERTON MARQUES BONGIOLO, RUY PAULO PHILIPP, et al. "Estratigrafia do Batólito Florianópolis, Cinturão Dom Feliciano, na Região de Garopaba-Paulo Lopes, SC." Pesquisas em Geociências 35, no. 1 (2008): 109. http://dx.doi.org/10.22456/1807-9806.17898.

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In southern Brazil, the Florianopolis Batholith results from prolonged, mainly granitic magmatism, as part of the Neoproterozoic Dom Feliciano Belt. Plutonic associations in this belt are related to transpressive tectonism (650-580 Ma) in post-collisional setting, where the translithospheric discontinuities of the Southern Brazilian Shear Belt have triggered magmatism, acting as channels for melts originated in deep crustal or mantle sources. In the region of Garopaba-Paulo Lopes, a fraction of this magmatism was studied, resulting in a formal proposition for its stratigraphic organization in
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33

Ketchum, John W. F., Nicholas G. Culshaw, and Sandra M. Barr. "Anatomy and orogenic history of a Paleoproterozoic accretionary belt: the Makkovik Province, Labrador, Canada." Canadian Journal of Earth Sciences 39, no. 5 (2002): 711–30. http://dx.doi.org/10.1139/e01-099.

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The Makkovik Province is a segment of a Paleoproterozoic accretionary belt (the Makkovik–Ketilidian orogen) that developed on the southern margin of Laurentia at 1.9–1.7 Ga. In contrast to coeval Laurentian orogenic belts that mainly resulted from collision of Archean plates, Makkovikian–Ketilidian orogenesis was dominated by active-margin processes including continental margin arc plutonism and juvenile terrane accretion, both of which were accompanied by regional transpression. In the Makkovik Province, earliest deformation and amphibolite-facies metamorphism of Paleoproterozoic rift–drift a
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34

Sevigny, J. H., and R. R. Parrish. "Age and origin of Late Jurassic and Paleocene granitoids, Nelson Batholith, southern British Columbia." Canadian Journal of Earth Sciences 30, no. 12 (1993): 2305–14. http://dx.doi.org/10.1139/e93-200.

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In the Middle Jurassic Nelson Batholith, southern British Columbia, young 40Ar/39Ar ages (i.e., 50–60 Ma) and distorted isobaric surfaces in the batholith suggest the possibility of Paleocene granitic plutonism. We present the results of a study undertaken to evaluate this possibility. Geochemical criteria successfully distinguish a suite of granitoids within the Nelson Batholith that differ from Nelson granites of similar SiO2 content. The granitoid suite is composed of 71.6–75.7 wt.% SiO2 leucocratic biotite granite and quartz monzonite with strong enrichments in alkaline, alkaline earth, an
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35

King, J. E., W. J. Davis, and C. Relf. "Late Archean tectono-magmatic evolution of the central Slave Province, Northwest Territories." Canadian Journal of Earth Sciences 29, no. 10 (1992): 2156–70. http://dx.doi.org/10.1139/e92-171.

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An early tectono-stratigraphic and late plutonic assemblage are distinguished in the central part of the Archean Slave Province (Contwoyto Lake area) on the basis of their relationship to deformation and metamorphic episodes, and by geochemical characteristics. The older assemblage, which predates the onset of intense deformation and the thermal peak of metamorphism, comprises 2.68–2.65 Ga calc-alkaline volcanic and plutonic rocks, as well as extensive turbidites. The younger assemblage comprises ca. 2.61–2.58 Ga plutonic units that were emplaced during and after deformation (D,–D3) and the th
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36

AUGLAND, LARS EIVIND, ARILD ANDRESEN, FERNANDO CORFU, and HANS KRISTIAN DAVIKNES. "Late Ordovician to Silurian ensialic magmatism in Liverpool Land, East Greenland: new evidence extending the northeastern branch of the continental Laurentian magmatic arc." Geological Magazine 149, no. 4 (2011): 561–77. http://dx.doi.org/10.1017/s0016756811000781.

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AbstractNew U–Pb ID-TIMS geochronological and whole-rock geochemical data from the Hurry Inlet Plutonic Terrane in Liverpool Land provide evidence of a Late Ordovician to Silurian magmatic arc in the East Greenland Caledonides. These voluminous granitoid rocks range from meladiorite to monzonite and granite, they are alkali-calcic to calc-alkaline and magnesian, and have characteristic arc granitoid trace element signatures. Zircon data give ages of 446 ± 2 and 438 ± 4 Ma for two phases of the Hurry Inlet Composite Pluton, 426 ± 1 Ma for a meladioritic xenolith in the anatectic Triaselv granit
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37

Wyborn, D., and B. W. Chappell. "The petrogenetic significance of chemically related plutonic and volcanic rock units." Geological Magazine 123, no. 6 (1986): 619–28. http://dx.doi.org/10.1017/s0016756800024134.

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AbstractComagmatic granitic and volcanic rocks are divided into two types depending on whether or not the primary magma contains restite crystals. Examples of both of these types are discussed from the Lachlan Fold Belt of southeastern Australia.Volcanic rocks containing restite phenocrysts are chemically identical to the associated plutonic rocks containing the same amount of restite. The more mafic granitic rocks correspond in composition to the most phenocryst-rich volcanics (up to 60% phenocrysts), and thus cannot be cumulate rocks produced by fractional crystallization, but must represent
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38

Bowers, Nancy E., and Kevin R. Chamberlain. "Precambrian history of the eastern Ferris Mountains and Bear Mountain, south-central Wyoming Province." Canadian Journal of Earth Sciences 43, no. 10 (2006): 1467–87. http://dx.doi.org/10.1139/e06-091.

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The eastern Ferris Mountains and Bear Mountain area of south-central Wyoming contain a complex assemblage of Archean and Proterozoic rock units, including a metasedimentary and metavolcanic supracrustal sequence named the Spanish Mine metamorphic suite, three granitic plutons (Turkey Creek, Ferris Mountains, Bear Mountain), and at least three sets of mafic dikes. The Spanish Mine metamorphic suite was deposited, intruded by mafic sills and (or) dikes, and underwent amphibolite-grade metamorphism and folding just prior to, or synkinematic with, the intrusion of the Turkey Creek metaplutonic sui
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39

Mamberti, Marc, Henriette Lapierre, Delphine Bosch, Etienne Jaillard, Jean Hernandez, and Mireille Polvé. "The Early Cretaceous San Juan Plutonic Suite, Ecuador: a magma chamber in an oceanic plateau?" Canadian Journal of Earth Sciences 41, no. 10 (2004): 1237–58. http://dx.doi.org/10.1139/e04-060.

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Sections through an oceanic plateau are preserved in tectonic slices in the Western Cordillera of Ecuador (South America). The San Juan section is a sequence of mafic–ultramafic cumulates. To establish that these plutonic rocks formed in an oceanic plateau setting, we have developed criteria that discriminate intrusions of oceanic plateaus from those of other tectonic settings. The mineralogy and crystallization sequence of the cumulates are similar to those of intra-plate magmas. Clinopyroxene predominates throughout, and orthopyroxene is only a minor component. Rocks of intermediate composit
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40

Brown, Edwin H., and George E. Gehrels. "Detrital zircon constraints on terrane ages and affinities and timing of orogenic events in the San Juan Islands and North Cascades, Washington." Canadian Journal of Earth Sciences 44, no. 10 (2007): 1375–96. http://dx.doi.org/10.1139/e07-040.

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Detrital zircon geochronology of this report pertains to Cretaceous orogeny in northwest Washington, an event that involved blueschist metamorphism and emplacement of nappes in the San Juan Islands – northwest Cascades thrust system and continental arc magmatism and associated Barrovian metamorphism in the neighboring Coast Plutonic Complex. Structurally low in the thrust system, quartzose gneiss of the Yellow Aster Complex yields an entirely Precambrian suite of detrital zircons, with an age pattern that is similar to that of Ordovician miogeoclinal rocks and the outboard Yukon–Tanana, Yreka,
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41

Dorais, M. J. "The petrogenesis and emplacement of the New Hampshire plutonic suite." American Journal of Science 303, no. 5 (2003): 447–87. http://dx.doi.org/10.2475/ajs.303.5.447.

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42

Benn, K., and R. Laurent. "Intrusive suite documented in the Troodos ophiolite plutonic complex, Cyprus." Geology 15, no. 9 (1987): 821. http://dx.doi.org/10.1130/0091-7613(1987)15<821:isditt>2.0.co;2.

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43

Higgins, Michael D., Mohcine Ider, and Otto van Breemen. "U-Pb ages of plutonism, wollastonite formation, and deformation in the central part of the Lac-Saint-Jean anorthosite suite." Canadian Journal of Earth Sciences 39, no. 7 (2002): 1093–105. http://dx.doi.org/10.1139/e02-033.

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The Lac-Saint-Jean anorthosite suite (LSJAS) is the largest ensemble of plutons in the Grenville Province. Zircons from a pluton in the central part of the LSJAS yield an age of 1140+10–5 Ma, which accords with existing 1157–1142 Ma ages determined from the southern part of the LSJAS. The Du Bras granite is a linear pluton emplaced into the dominantly dextral Pipmuacan shear zone (PSZ). The U–Pb zircon age of 1148 ± 2 Ma for the Du Bras granite confirms earlier proposals that it is a granophyre, formed at greater depths by partial melting of paragneiss by the heat of the crystallizing anorthos
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44

Pharaoh, T. C., T. S. Brewer, and P. C. Webb. "Subduction-related magmatism of late Ordovician age in eastern England." Geological Magazine 130, no. 5 (1993): 647–56. http://dx.doi.org/10.1017/s0016756800020951.

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AbstractDeep boreholes show that plutonic and volcanic igneous rocks comprise an important component of the Caledonian basement in eastern England. The isotopic compositions of these rocks reveal that many of them are of late Ordovician age (440–460 Ma), and their geochemical compositions suggest calc–alkaline affinities. The intermediate (diorite-tonalite) plutonic rocks are associated with a prominent northwest–southeast trending belt of aeromagnetic anomalies extending from Derby to St Ives, Hunts., which is interpreted to work the plutonic core of a calc-alkaline magmatic arc. It is inferr
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45

HOU, MING-LAN, YAO-HUI JIANG, SHAO-YONG JIANG, HONG-FEI LING, and KUI-DONG ZHAO. "Contrasting origins of late Mesozoic adakitic granitoids from the northwestern Jiaodong Peninsula, east China: implications for crustal thickening to delamination." Geological Magazine 144, no. 4 (2007): 619–31. http://dx.doi.org/10.1017/s0016756807003494.

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Two suites of granitoids, the Late Jurassic (158 ± 3 Ma) Linglong suite and the Early Cretaceous (130–126 Ma) Guojialing suite, crop out in the northwestern Jiaodong Peninsula, eastern China. The Linglong suite is a monzogranite, comprising alkali feldspar, plagioclase, quartz and Fe-rich biotite. The Guojialing suite includes at least five plutonic bodies of both granodiorite and monzo-granite. The rocks are composed of plagioclase, alkali feldspar, quartz, Mg-rich amphibole and Mg-rich biotite. Both the Linglong and Guojialing suites have adakitic affinity. They are enriched in LREE with hig
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46

Whalen, J. B., J. K. Mortensen, and J. C. Roddick. "Implications of U–Pb and K–Ar geochronology for petrogenesis and cooling history of the McGerrigle Mountains plutonic complex, Gaspé, Quebec." Canadian Journal of Earth Sciences 28, no. 5 (1991): 754–61. http://dx.doi.org/10.1139/e91-065.

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The high-level McGerrigle Mountains plutonic complex consists of a compositionally diverse (gabbro to granite) hybrid suite at its northern end and a relatively homogeneous granite suite in its southern half. Field and geochemical evidence support formation by hybridization between at least three end-member magmas. New U–Pb zircon and titanite ages from these end members indicate that intrusion of all components took place at 391.3 ± 3.4 Ma. Eighteen new K–Ar mineral ages, which cover the range 370–390 Ma, suggest that the granite suite cooled quickly to &lt; 500 °C in less than 2 Ma, whereas
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47

Barker, Abigail, Thor Hansteen, and David Nilsson. "Unravelling the Crustal Architecture of Cape Verde from the Seamount Xenolith Record." Minerals 9, no. 2 (2019): 90. http://dx.doi.org/10.3390/min9020090.

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The Cape Verde oceanic plateau hosts 10 islands and 11 seamounts and provides an extensive suite of alkaline lavas and pyroclastic rocks. The volcanic rocks host a range of crustal and mantle xenoliths. These xenoliths provide a spectrum of lithologies available to interact with magma during transport through the lithospheric mantle and crust. We explore the origin and depth of formation of crustal xenoliths to develop a framework of magma-crust interaction and a model for the crustal architecture beneath the Cape Verde oceanic plateau. The host lavas are phononephelinites to phonolites and th
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48

Patchett, P. J., G. E. Gehrels, and C. E. Isachsen. "Nd isotopic characteristics of metamorphic and plutonic rocks of the Coast Mountains near Prince Rupert, British Columbia." Canadian Journal of Earth Sciences 35, no. 5 (1998): 556–61. http://dx.doi.org/10.1139/e98-007.

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Nd isotopic data are presented for a suite of metamorphic and plutonic rocks from a traverse across the Coast Mountains between Terrace and Prince Rupert, British Columbia, and for three contrasting batholiths in the Omineca Belt of southern Yukon. A presumed metamorphic equivalent of Jurassic volcanic rocks of the Stikine terrane gives epsilon Nd = +6, and a number of other metaigneous and metasedimentary rocks in the core of the Coast Mountains give epsilon Nd values from +3 to +7. A single metasedimentary rock approximately 3 km east of the Work Channel shear zone gives a epsilon Nd value o
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49

Blum, Joel D., Alex E. Blum, Terry E. Davis, and John T. Dillon. "Petrology of cogenetic silica-saturated and -oversaturated plutonic rocks in the Ruby geanticline of north-central Alaska." Canadian Journal of Earth Sciences 24, no. 1 (1987): 159–69. http://dx.doi.org/10.1139/e87-013.

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Felsic plutonic rocks in the northwestern portion of the Ruby geanticline of north-central Alaska occur as two distinct rock suites: (1) silica-saturated monzonite and syenite and (2) silica-oversaturated granite. K–Ar mineral ages for each suite average 107 ± 6 Ma, and both suites plot along a single Rb–Sr whole-rock isochron that yields an age of 112 ± 4 Ma and an initial 87Sr/86Sr ratio of 0.70778 ± 0.00006. Whole-rock δ18O values range from + 6.75 to + 7.30‰. The two suites cannot be related by simple fractionation, yet they appear to have a chemically and isotopically similar parental mag
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50

René, Miloš. "Alteration of Granitoids and Uranium Mineralization in the Blatná Suite of the Central Bohemian Plutonic Complex, Czech Republic." Minerals 10, no. 9 (2020): 821. http://dx.doi.org/10.3390/min10090821.

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The Bohemian magmatic complex belongs to granitoid plutons of the Central European Variscides. Hydrothermal uranium mineralization evolved in the small uranium deposits Nahošín and Mečichov is associated with N–S shear zones occurring on the SW margin of the Central Bohemian plutonic complex formed by amphibole-bearing biotite granodiorites of the Blatná suite. The purpose of presented study is description of uranium mineralization bounded on brittle shear zones, which is coupled with intense low-temperature hydrothermal alteration of granitic rocks. Uranium mineralization, formed predominantl
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