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Itsaq Complex

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Journal Article
Published: 01 July 2005
The Journal of Geology (2005) 113 (4): 375–397.
...Clark R. L. Friend; Allen P. Nutman Abstract The Itsaq Gneiss Complex of the Nuuk region, southern West Greenland, is dominated by 3850–3690 Ma tonalites intruded into and intercalated with lesser amounts of different ≥3850–3700 Ma supracrustal units. Published whole-rock Sr and Nd isotopic studies...
FIGURES | View All (13)
Journal Article
Published: 18 January 2010
Canadian Journal of Earth Sciences (2011) 48 (2): 141–160.
...Yuri Amelin; Sandra L. Kamo; Der-Chuen Lee Abstract Zircon grains in rocks collected from the Itsaq Gneiss Complex, southwest Greenland, were analyzed for U–Pb and Lu–Hf in the same grain using isotope dilution – thermal ionization mass spectrometry (TIMS) and multicollector – inductively coupled...
Series: Geological Society, London, Special Publications
Published: 01 January 2009
DOI: 10.1144/SP318.5
EISBN: 9781862395664
... Abstract Eoarchaean crust in West Greenland (the Itsaq Gneiss Complex, 3870–3600 Ma) is >80% by volume orthogneisses derived from plutonic tonalite–trondhjemite–granodiorite (TTG) suites, <10% amphibolites derived from basalts and gabbros, <10% crustally derived granite, <1...
FIGURES | View All (10)
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Schematic evolution for the <span class="search-highlight">Itsaq</span> Gneiss <span class="search-highlight">Complex</span>, southwest Greenland. This...
Published: 01 August 2006
FIGURE 2 Schematic evolution for the Itsaq Gneiss Complex, southwest Greenland. This interpretation is based on extensive fieldwork coupled with zircon dating of more than 100 rocks ( Friend and Nutman 2005 ). The figure illustrates the complexity of crustal evolution shown by all surviving
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<span class="search-highlight">Itsaq</span> Gneiss <span class="search-highlight">Complex</span> rocks.  A , Segregation consisting of     plagioclase ...
Published: 01 July 2005
Figure 2. Itsaq Gneiss Complex rocks. A , Segregation consisting of plagioclase  +  quartz and large orthopyroxenes in metakomatiites, east side of Innersuartuut, an extremely rare example that escaped total retrogression during later Archean amphibolite facies metamorphisms
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Summary histograms and relative probability plots (in background) for zirco...
Published: 01 May 2004
Fig. 2.  Summary histograms and relative probability plots (in background) for zircon U–Pb dating of tonalitic rocks and granites ( sensu stricto ) from the Itsaq Gneiss Complex. This contains dates on >70 rocks, based on >2500 zircon analyses. It should be noted that the youngest granitic
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Geological map of the Nuuk district, West Greenland, showing extent of the ...
Published: 01 July 2005
Figure 1. Geological map of the Nuuk district, West Greenland, showing extent of the early Archean Itsaq Gneiss Complex and location of samples studied in this article.
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Geological map of the Nuuk district, West Greenland, showing extent of the ...
Published: 01 May 2004
Fig. 1.  Geological map of the Nuuk district, West Greenland, showing extent of the early Archaean Itsaq Gneiss Complex and location of dated Ameralik dykes.
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Summary histograms and relative probability plots (in background) for zirco...
Published: 01 July 2005
Figure 10. Summary histograms and relative probability plots (in background) for zircon U/Pb dating of tonalite-trondhjemite-granodiorite, mafic intrusions, granites (sensu stricto), and early high-grade metamorphism from the Itsaq Gneiss Complex.
Journal Article
Published: 01 May 2004
Journal of the Geological Society (2004) 161 (3): 421–430.
...Fig. 2.  Summary histograms and relative probability plots (in background) for zircon U–Pb dating of tonalitic rocks and granites ( sensu stricto ) from the Itsaq Gneiss Complex. This contains dates on >70 rocks, based on >2500 zircon analyses. It should be noted that the youngest granitic...
FIGURES | View All (6)
Series: GSA Special Papers
Published: 01 January 2006
DOI: 10.1130/2006.2405(05)
... distributions obtained in this study with known terranes with intact Paleoarchean rocks, most similarity is observed with the Itsaq Gneiss Complex of western Greenland. A lack of ca. 3.6–3.3 Ga igneous crystallization and detrital zircon ages is apparent in the data from the western Rae Province and from...
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(A) Superior Province, showing location of inset (B) of Minto Block. Number...
Published: 01 January 2009
Figure 1. (A) Superior Province, showing location of inset (B) of Minto Block. Numbers 1–6 refer to localities discussed in text: (1) Isua greenstone belt and Itsaq Gneiss Complex, Greenland; (2) Assean Lake, Manitoba; (3) Northern Superior Superterrane, Ontario; (4) Minnesota River Valley
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( A ) Typical banded gneiss (bgn) consisting of older tonalite (&gt;3.7 Ga,...
Published: 01 August 2006
FIGURE 1 ( A ) Typical banded gneiss (bgn) consisting of older tonalite (>3.7 Ga, grey) and younger granite (3.65 Ga, white), Itsaq Gneiss Complex, Greenland. The gneiss was cut by a mid-Archean dyke, now an amphibolite (ad), which was strongly deformed at 2.7 Ga. ( B ) Cathodoluminescence
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( A ) Typical banded gneiss (bgn) consisting of older tonalite (&gt;3.7 Ga,...
Published: 01 August 2006
FIGURE 1 ( A ) Typical banded gneiss (bgn) consisting of older tonalite (>3.7 Ga, grey) and younger granite (3.65 Ga, white), Itsaq Gneiss Complex, Greenland. The gneiss was cut by a mid-Archean dyke, now an amphibolite (ad), which was strongly deformed at 2.7 Ga. ( B ) Cathodoluminescence
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Time-series analysis of Jack Hills (Western Australia) zircon. (A) Jack Hil...
Published: 26 April 2022
cycle interpreted from the Itsaq Gneiss Complex of Greenland ( Nutman, 2006 ) are indicated. (D) Bootstrap resampling of Jack Hills zircon (blue; error bars show 2 s.e.m. [standard error of the mean] uncertainties; Fig. S3) compares favorably to the bandpass filter of the supercontinent cycle (red
Journal Article
Journal: Elements
Published: 01 August 2006
Elements (2006) 2 (4): 223–227.
...FIGURE 2 Schematic evolution for the Itsaq Gneiss Complex, southwest Greenland. This interpretation is based on extensive fieldwork coupled with zircon dating of more than 100 rocks ( Friend and Nutman 2005 ). The figure illustrates the complexity of crustal evolution shown by all surviving...
FIGURES | View All (6)
Journal Article
Journal: Geology
Published: 01 April 2012
Geology (2012) 40 (4): 383–384.
... in partially molten, mafic, compositions with modeling of trace-element fractionation between melt and residual phases. They compare the derived trace-element composition of the melt phase with those of tonalites in the Eoarchean (3.7–3.8 Ga) Itsaq Complex, southwest Greenland. It is clear that these TTGs...
FIGURES
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Candidates for the oldest volcanic and sedimentary rocks from the <span class="search-highlight">Itsaq</span> Gne...
Published: 01 August 2006
FIGURE 3 Candidates for the oldest volcanic and sedimentary rocks from the Itsaq Gneiss Complex, southwest Greenland. ( A ) Rare pillow lava structure in Isua amphibolites (discovered by Komiya et al. 1999 ). The shape of the pillows is well-enough preserved to allow determination of the top
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(A) Locations of zircon trace element data examined in this study, highligh...
Published: 16 December 2021
Figure 1. (A) Locations of zircon trace element data examined in this study, highlighting the Barberton suite, South Africa. (1) Acasta Gneiss Complex ( Reimink et al., 2020 ); (2) Kola ( Vetrin et al., 2016 ); (3) Itsaq Gneiss Complex ( Whitehouse and Kamber, 2002 ; Nutman et al., 2007
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Major Precambrian elements from North America and Greenland (modified from ...
Published: 01 January 2009
Superior Superterrane, Ontario; 4—Nuvvuagittuq, Quebec; 5—Minnesota River Valley gneisses; 6—Saglek-Hebron area, Northern Labrador; 7—Itsaq Gneiss Complex, Greenland; 8—Acasta Gneiss, Slave Province, Northwest Territories. See text for discussion. BO—Baffin orogen; KO—Ketillidian orogen; NO—Nagssugtoqidian