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Kigluaik dike swarm

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Kigluaik diabase dike swarm is shown in relation to the Cretaceous intrusive rocks in the Kigluaik gneiss dome. Circles indicate localities where dike orientations could not be determined. Density of dikes in the southernmost parts of the map area (the Nome Group) could be higher than shown; exposures are poor. The only reported dike is from a drill hole in the Mount Distin area (circle in the southeast corner). The area east of the broken line was not mapped in detail for diabase dikes, therefore the density of dikes there is unknown. Stereonet shows poles to diabase dikes. pC-Pz, Precambrian–Paleozoic. Geology by Amato (1995) and Amato and Miller (1997).

Kigluaik diabase dike swarm is shown in relation to the Cretaceous intrusiv...

Published: 13 June 2003
Fig. 3. Kigluaik diabase dike swarm is shown in relation to the Cretaceous intrusive rocks in the Kigluaik gneiss dome. Circles indicate localities where dike orientations could not be determined. Density of dikes in the southernmost parts of the map area (the Nome Group) could be higher than
Image
Trace element geochemical data comparing the Kigluaik diabase dike swarm with the mafic to intermediate root of the Kigluaik pluton. The two data sets are very similar, with the dikes displaying a greater compositional range as shown particularly in the Cr/Zr plot. Geochemical data for dikes are provided in Table 1. Data for the pluton are from Amato and Wright (1997).

Trace element geochemical data comparing the Kigluaik diabase dike swarm wi...

Published: 13 June 2003
Fig. 7. Trace element geochemical data comparing the Kigluaik diabase dike swarm with the mafic to intermediate root of the Kigluaik pluton. The two data sets are very similar, with the dikes displaying a greater compositional range as shown particularly in the Cr/Zr plot. Geochemical data
Journal Article

Dike swarms on Seward Peninsula, Alaska, and their implications for the kinematics of Cretaceous extension in the Bering Strait region

Jeffrey M. Amato, Elizabeth L. Miller, James E. Wright, William C. McIntosh
Published: 13 June 2003
Canadian Journal of Earth Sciences (2003) 40 (6): 865–886.
DOI: https://doi.org/10.1139/e03-019
...Fig. 3. Kigluaik diabase dike swarm is shown in relation to the Cretaceous intrusive rocks in the Kigluaik gneiss dome. Circles indicate localities where dike orientations could not be determined. Density of dikes in the southernmost parts of the map area (the Nome Group) could be higher than...
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View PDF for article title, <span class="search-highlight">Dike</span> <span class="search-highlight">swarms</span> on Seward Peninsula, Alaska, and their implications for the kinematics of Cretaceous extension in the Bering Strait region
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Harker diagrams comparing the geochemistry of the Kigluaik diabase dike swarm with the mafic to intermediate root of the Kigluaik pluton. For each of these major elements, the dikes and pluton show very similar concentrations and trends. Dike data are more scattered, probably owing to contamination by country rock xenoliths and xenocrysts. In the Na2O + K2O Harker diagram, the fields delineated are trachybasalt (1), basaltic trachyandesite (2), and trachyandesite (3) (Le Bas et al. 1986). Geochemical data for dikes are shown in Table 1. Data for the pluton are from Amato and Wright (1997).

Harker diagrams comparing the geochemistry of the Kigluaik diabase dike swa...

Published: 13 June 2003
Fig. 6. Harker diagrams comparing the geochemistry of the Kigluaik diabase dike swarm with the mafic to intermediate root of the Kigluaik pluton. For each of these major elements, the dikes and pluton show very similar concentrations and trends. Dike data are more scattered, probably owing
Image
Age spectra for groundmass concentrates (A–D) and biotite (E) from diabase dikes in the Kigluaik Mountains, Alaska. The higher temperature segments of the spectra approached but did not meet plateau criteria. Weighted-mean ages for A–D range from 80.7 ± 1.2 to 83.3 ± 0.9 Ma, and the weighted-mean age for the biotite (E) is 83.6 ± 0.8 Ma. This oldest age (∼84 Ma) is considered to be the minimum age for the dike swarm. See text for details.

Age spectra for groundmass concentrates (A–D) and biotite (E) from diabase ...

Published: 13 June 2003
Fig. 10. Age spectra for groundmass concentrates (A–D) and biotite (E) from diabase dikes in the Kigluaik Mountains, Alaska. The higher temperature segments of the spectra approached but did not meet plateau criteria. Weighted-mean ages for A–D range from 80.7 ± 1.2 to 83.3 ± 0.9 Ma
Image
Index map of the Seward Peninsula, showing the high-grade metamorphic culminations (gneiss domes) flanked by lower grade metamorphic rocks in the Kigluaik, Bendeleben, and Darby mountains. The York Mountains area exposes only low-grade to unmetamorphosed rocks. Cretaceous plutonic rocks in each area are also shown. Dike swarms in each area are displayed in larger scale maps as indicated in the figure.

Index map of the Seward Peninsula, showing the high-grade metamorphic culmi...

Published: 13 June 2003
in each area are also shown. Dike swarms in each area are displayed in larger scale maps as indicated in the figure.
Journal Article

Syntectonic 1.46 Ga magmatism and rapid cooling of a gneiss dome in the southern Mazatzal Province: Burro Mountains, New Mexico

Jeffrey M. Amato, Matthew T. Heizler, Andre O. Boullion, Amos E. Sanders, Jaime Toro, Virginia T. McLemore, Christopher L. Andronicos
Journal: GSA Bulletin
Published: 01 September 2011
GSA Bulletin (2011) 123 (9-10): 1720–1744.
DOI: https://doi.org/10.1130/B30337.1
.... (2003) . Abundant diabase dikes are inferred to be part of the ca. 1.1 Ga dike swarm that is exposed throughout the southwest United States ( Howard, 1991 ). Another intrusive unit in the area mapped as Mesoproterozoic, the “Yd” diorite of Hedlund (1980a) , was later determined to be Cretaceous in age...
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View PDF for article title, Syntectonic 1.46 Ga magmatism and rapid cooling of a gneiss dome in the southern Mazatzal Province: Burro Mountains, New Mexico
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Journal Article

Geochronologic Constraints on the Tectonic Evolution and Exhumation of Nanga Parbat, Western Himalaya Syntaxis, Revisited

D. A. Schneider, P. K. Zeitler, W. S. F. Kidd, M. A. Edwards
Published: 01 September 2001
The Journal of Geology (2001) 109 (5): 563–583.
DOI: https://doi.org/10.1086/322764
.... 1 ). In the apparently localized “dike swarm” in the northern valley wall (the Rupal face), we sampled three leucogranite dikes from the walls above Tap meadow and one dike from Lotbo meadow to the west. The predominantly undeformed, structurally discordant tourmaline-pegmatitic dikes are 1–2 m...
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View PDF for article title, Geochronologic Constraints on the Tectonic Evolution and Exhumation of Nanga Parbat, Western Himalaya Syntaxis, Revisited
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Journal Article

The Lower Cretaceous sequence of western Alaska—demise of the Koyukuk terrane?

Travis L. Hudson, Robert B. Blodgett, Frederic H. Wilson
Published: 14 December 2022
Canadian Journal of Earth Sciences (2023) 60 (4): 422–441.
DOI: https://doi.org/10.1139/cjes-2022-0041
...) . The plutonic rocks of the western YKB form five plutons as large as about 900 km 2 in exposed area and many smaller intrusions, including 12 ultrapotassic complexes or dike swarms. These intrusions are in an arcuate belt 250 km long extending westward from the central Shungnak quadrangle to the western Candle...
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Journal Article

Continental collisions and the creation of ultrahigh-pressure terranes: Petrology and thermochronology of nappes in the central Scandinavian Caledonides

Bradley R. Hacker, Philip B. Gans
Journal: GSA Bulletin
Published: 01 January 2005
GSA Bulletin (2005) 117 (1-2): 117–134.
DOI: https://doi.org/10.1130/B25549.1
... character is indicated by the dominance of mica schist, amphibolite, and quartzofeldspathic gneisses, and they have been suggested to be higher-grade equivalents of rocks within the Middle Allochthon ( Dallmeyer, 1988 ); this correlation is reinforced by the presence of 608 Ma crosscutting mafic dikes...
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View PDF for article title, Continental collisions and the creation of ultrahigh-pressure terranes: Petrology and thermochronology of nappes in the central Scandinavian Caledonides
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Journal Article

Young and Old Granulites: A Volatile Connection

Robert C. Newton
Published: 01 September 2020
The Journal of Geology (2020) 128 (5): 395–413.
DOI: https://doi.org/10.1086/711026
... lithospheric plate, with profound thermal effects. A major change of lithospheric motion is associated with swarms of carbonatite dikes in the beginning of transcurrent faulting on the Alpine Fault of South Island, New Zealand (Cooper et al. 1987 ) and in the opening of the Labrador Sea between Canada...
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Journal Article

Apatite fission-track evidence for regional exhumation in the subtropical Eocene, block faulting, and localized fluid flow in east-central Alaska

Cynthia Dusel-Bacon, Charles R. Bacon, Paul B. O’Sullivan, Warren C. Day
Published: 27 January 2016
Canadian Journal of Earth Sciences (2016) 53 (3): 260–280.
DOI: https://doi.org/10.1139/cjes-2015-0138
.... Geological Society of America, Special Paper 434, pp. 233–264. Trop , J.M. Benowitz , J.A. Cole , R.B. O’Sulivan , P. 2014 . The Alaska Range suture zone: latest Cretaceous arc volcanism and Oligocene strike-slip basin development and coeval dike swarms [abstract] . Geological...
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