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Seguam Island

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Journal Article
Journal: GSA Bulletin
Published: 01 July 2006
GSA Bulletin (2006) 118 (7-8): 805-822.
...Brian R. Jicha; Brad S. Singer AbstractNew 40Ar/39Ar dating coupled with detailed field mapping, stratigraphy, and chemical analyses have established an eruptive chronology that reveals and constrains the compositional and volumetric evolution of Seguam Island in the Aleutian Island arc, Alaska...
FIGURES | View All (12)
Journal Article
Published: 01 June 1993
The Canadian Mineralogist (1993) 31 (2): 459-466.
Image
(A) Profile 1232E994 crosses the forearc offshore of <b>Seguam</b> <b>Island</b>. HRSZ—Ha...
in > Geosphere
Published: 01 December 2012
Figure 9. (A) Profile 1232E994 crosses the forearc offshore of Seguam Island. HRSZ—Hawley Ridge shear zone. (B) Close-up of area shown in box in A. Normal offset faults deform elevated area of Aleutian Terrace. No mass transport deposits are imaged within the forearc basin. Dark blue—base
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TABLE 3. COMPARISON OF K-Ar AND  40 Ar&#x2F; 39 Ar AGES OF <b>SEGUAM</b> <b>ISLAND</b> LAVAS
Published: 01 July 2006
TABLE 3. COMPARISON OF K-Ar AND 40 Ar/ 39 Ar AGES OF SEGUAM ISLAND LAVAS
Image
Figure 2. Digital elevation models (DEMs) of <b>Seguam</b> <b>Island</b> with shaded area...
Published: 01 July 2006
Figure 2. Digital elevation models (DEMs) of Seguam Island with shaded areas indicating the three main stages of eruptive activity over the past 318 k.y. Dots represent sample locations and are shown with corresponding 40 Ar/ 39 Ar ages reported in ka. The ages of 6.0 and 1.7 ka shown
Image
Figure 4. Geologic map of <b>Seguam</b> <b>Island</b>. Topographic base map is compiled f...
Published: 01 July 2006
Figure 4. Geologic map of Seguam Island. Topographic base map is compiled from National Oceanic and Atmospheric Administration (NOAA) (1972) maps T-10322, T-10323, T-10324, and T-10325. The oldest of the 34 units are shown in shades of brown, orange, and gray. Lava flows flanking the Wilcox volcano
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Figure 10. Cumulative eruptive volume versus time for the <b>Seguam</b> <b>Island</b> vol...
Published: 01 July 2006
Figure 10. Cumulative eruptive volume versus time for the Seguam Island volcanic complex showing the total volume of each magma type erupted over the past 318 k.y. The total volume of erupted material is denoted by the black line. The oldest volcanism is primarily basaltic; however, >30
Image
Figure 12. Minimum cumulative volume versus time for <b>Seguam</b> <b>Island</b> and othe...
Published: 01 July 2006
Figure 12. Minimum cumulative volume versus time for Seguam Island and other well-dated Pleistocene to Holocene arc volcanoes. Data are restricted to the volume erupted at each volcano over the last 400 k.y. Data from Katmai volcanic cluster encompass seven frontal arc volcanoes and five rear-arc
Journal Article
Journal: Geology
Published: 01 November 1990
Geology (1990) 18 (11): 1050-1053.
...Bradley S. Singer; James D. Myers AbstractNew geologic, petrologic, and Sr isotope data from Seguam Island, Alaska, reveal substantial variation in the composition of magmas of the central Aleutian arc. The data indicate that variable magmatic processes occur along the strike of the arc. Seguam...
Journal Article
Published: 01 April 2015
American Mineralogist (2015) 100 (4): 806-823.
... of the vapor bubbles in MI from the 1959 Kilauea Iki (Hawaii), 1960 Kapoho (Hawaii), 1974 Fuego volcano (Guatemala), and 1977 Seguam Island (Alaska) eruptions. We found that the bubbles typically contain 40 to 90% of the total CO2 in the MI. Reconstructing the original CO2 content by adding the CO2...
FIGURES | View All (9)
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Figure 9. Evolution of ( 230 Th&#x2F; 232  Th) 0  ratios measured in <b>Seguam</b> Isla...
Published: 01 July 2006
Figure 9. Evolution of ( 230 Th/ 232 Th) 0 ratios measured in Seguam Island lavas as a function of eruptive age (expressed as e λ t ) (after Jicha et al., 2005 ). These ratios were obtained from the intercepts of mineral-glass whole-rock isochrons with the equiline. The lavas that erupted
Journal Article
Journal: Geology
Published: 01 April 1992
Geology (1992) 20 (4): 367-370.
...Bradley S. Singer; James R. O'Neil; James G. Brophy AbstractThe first measurement of 18O/16O ratios of plagioclase, clinopyroxene, orthopyroxene, and titanomagnetite phenocrysts from modern Aleutian island-arc lavas provides new insight and independent constraints on magma sources and intracrustal...
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Figure 1. Bathymetric map of the Aleutian <b>Island</b> arc showing the location o...
Published: 01 July 2006
Figure 1. Bathymetric map of the Aleutian Island arc showing the location of Seguam Island and several other well-known islands and volcanic centers. Contour interval is 400 m. The Aleutian trench lies ∼170 km seaward of the volcanic axis. Subduction of the Pacifi c plate becomes increasingly
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TABLE 2. REPRESENTATIVE WHOLE-ROCK MAJOR- AND TRACE-ELEMENT COMPOSITIONS OF...
Published: 01 July 2006
TABLE 2. REPRESENTATIVE WHOLE-ROCK MAJOR- AND TRACE-ELEMENT COMPOSITIONS OF SEGUAM ISLAND LAVAS
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Figure 3. FeO*/MgO and K 2 O variation versus SiO 2  (wt%) for 141 samples ...
Published: 01 July 2006
Figure 3. FeO*/MgO and K 2 O variation versus SiO 2 (wt%) for 141 samples from Seguam Island. Analyses by inductively coupled plasma–mass spectrometry (ICP-MS) at Actlabs in Ontario, Canada ( n = 51), X-ray fluorescence (XRF) at the Universität Göttingen, Germany ( n = 40), and XRF from
Image
Photomicrographs of representative MI from this study. ( a ) a typical glas...
Published: 01 April 2015
) A typical glassy, bubble-bearing MI (Seguam 14.1) hosted by olivine from tephras erupted on Pyre Peak (1977), Seguam Island, Alaska. This MI shows the “wrinkled” texture that is common in the larger MI (~100 μm or larger) from these samples. ( e ) An olivine-hosted MI from Seguam Island, Alaska (SEG 7.1
Journal Article
Journal: GSA Bulletin
Published: 01 September 2007
GSA Bulletin (2007) 119 (9-10): 1027-1051.
...J.C. Carracedo; E. Rodríguez Badiola; H. Guillou; M. Paterne; S. Scaillet; F.J. Pérez Torrado; R. Paris; U. Fra-Paleo; A. Hansen AbstractThe Teide and Pico Viejo stratocones and the Northwest and Northeast Rifts are products of the latest eruptive phase of the island of Tenerife, initiated...
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Relationship between the density of CO 2  measured in the vapor bubbles of ...
Published: 01 April 2015
volcano (Guatemala), and ( c ) the 1977 Pyre Peak eruption of Seguam Island (Alaska). The contours show the proportion of the total amount of CO 2 in the MI that is contained in the bubble, assuming a bulk glass density of 2.75 g/cm 3 and CO 2 concentrations in the glass of 300 ppm CO 2 ( a ), 700 ppm
Series: Geological Society, London, Special Publications
Published: 01 January 2018
DOI: 10.1144/SP460.9
EISBN: 9781786203410
... the Lomonosov Ridge (near the North Pole), across the Amerasia Basin, Chukchi Sea and Bering Sea, and ending at the subducting Pacific plate margin in the Aleutian Islands. We propose a new plate tectonic model in which the AACM originated as part of a re-entrant in the palaeo-Pacific margin and moved to its...
FIGURES | View All (16)
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H 2 O and CO 2  contents of MI from ( a ) the 1959 Iki eruption at the summ...
Published: 01 April 2015
Figure 5 H 2 O and CO 2 contents of MI from ( a ) the 1959 Iki eruption at the summit of Kilauea (Hawaii), ( b ) the 1960 Kapoho eruption on the East Rift Zone of Kilauea, ( c ) the 1974 eruption of Fuego volcano (Guatemala), and ( d ) the 1977 eruption of Seguam Island (Alaska). ( a – d