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all geography including DSDP/ODP Sites and Legs
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Africa
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South Africa (1)
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West Africa
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Cameroon
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potassium (4)
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magnesium
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aluminum (1)
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lead
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Pb-206/Pb-204 (4)
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Primary terms
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Africa
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West Africa
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Cameroon
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Mount Cameroon (1)
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Qiangtang Terrane (2)
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Russian Pacific region (4)
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1-20 OF 331 RESULTS FOR
Adak
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Journal Article
THE FIRST FINDING OF A (ADAK)-TYPE MAGNESIAN ANDESITES ON THE KAMCHATKA PENINSULA
O. N. Volynets, A. N. Ovcharenko, M. E. Boyarinova, R. W. Kay, G. N. Anoshin, A. A. Agapova, Yu. V. Gol’tsman
Journal: Russian Geology and Geophysics
Publisher: Novosibirsk State University
Published: 01 November 1998
Russ. Geol. Geophys. (1998) 39 (11): 1552–1564.
... 2 O contents. Nevertheless, the geochemical composition of these rocks remained the same, and in trace-element composition (La/Yb, K/La, Rb/La, and La/Cs) they are close to A -type magnesian andesites from Adak Island (Central Aleutians). Geochemical data suggest that there is no genetic...
Journal Article
A comparison of seismicity rates near Adak Island, Alaska, September 1988 through May 1990 with rates before the 1982 to 1986 apparent quiescence
Publisher: Seismological Society of America
Published: 01 October 1994
Bulletin of the Seismological Society of America (1994) 84 (5): 1560–1570.
...
C.
(1985) .
Seismicity associated with a cluster of earthquakes of m b ≧ 4.5 near Adak, Alaska: evidence for an asperity? Bull. Seism. Soc. Am. 75 ,
223 -
236 .
Das
S.
Kostrov...
Journal Article
Eocene diatom chert from Adak Island, Alaska
Journal: Journal of Sedimentary Research
Publisher: SEPM Society for Sedimentary Geology
Published: 01 March 1990
Journal of Sedimentary Research (1990) 60 (2): 250–257.
...James R. Hein; Hsueh-Wen Yeh; John A. Barron Abstract Bedded quartz cherts that contain recognizable diatoms are rare in the geologic record and are described here for the first time. The Eocene Andrew Lake Formation on Adak Island, Alaska consists of about 800 m of sedimentary and volcanogenic...
Journal Article
Seismicity associated with a recent earthquake of m b 5.8 beneath Adak Canyon, central Aleutian islands
Publisher: Seismological Society of America
Published: 01 December 1985
Bulletin of the Seismological Society of America (1985) 75 (6): 1853–1858.
....
(1979) .
Tectonic implications of seismicity in the Adak Canyon region, central Aleutians ,
Bull. Seism. Soc. Am. 69 ,
1515 -
1532 .
Minster
J. B.
Jordan
T. H...
Journal Article
Coda Q in the Adak seismic zone
Publisher: Seismological Society of America
Published: 01 April 1985
Bulletin of the Seismological Society of America (1985) 75 (2): 615–620.
... with a cluster of earthquakes of m b ≧ 4.5 near Adak, Alaska: evidence for an asperity ?
Bull. Seism. Soc. Am. 75 ,
223 -
236 .
Byrkit
D. R.
(1980) .
Elements of Statistics ,
3rd ed. ,
D. van Nostrand Company ,
New York ,
482 pp...
Journal Article
Seismicity associated with a cluster of earthquakes of m b ≧ 4.5 near Adak, Alaska: Evidence for an asperity?
Publisher: Seismological Society of America
Published: 01 February 1985
Bulletin of the Seismological Society of America (1985) 75 (1): 223–236.
...J. Roger Bowman; Carl Kisslinger Abstract An area of the main thrust zone south of Adak, Alaska, in the central Aleutian island arc is characterized by clustering of hypocenters of earthquakes of m b ≧ 4.5 and by low b -value relative to the rest of the thrust zone. The location and dimension...
Journal Article
Variations of apparent stresses and stress drops prior to the earthquake of 6 May 1984 ( m b = 5.8) in the Adak Seismic Zone
Publisher: Seismological Society of America
Published: 01 December 1984
Bulletin of the Seismological Society of America (1984) 74 (6): 2577–2592.
...Frank Scherbaum; Carl Kisslinger Abstract On 6 May 1984, a m b = 5.8 earthquake occurred within a subregion of the Adak Seismic Zone that had shown clustering of m b >4.5 earthquakes during the last 3 yr. This region has been examined for premonitory variations in stress drop and apparent...
Journal Article
Revised focal depths and velocity model for local earthquakes in the Adak Seismic zone
Publisher: Seismological Society of America
Published: 01 August 1984
Bulletin of the Seismological Society of America (1984) 74 (4): 1349–1360.
...Thomas Toth; Carl Kisslinger Abstract A technique suggested by Hales et al. (1981) for determining hypocentral depths that are relatively independent of the velocity model originally used to locate the earthquakes is applied to a carefully selected set of earthquakes located with the Adak Seismic...
Journal Article
Metamorphism in the Aleutian Arc; the Finger Bay Pluton, Adak, Alaska
Journal: The Canadian Mineralogist
Publisher: Mineralogical Association of Canada
Published: 01 November 1983
The Canadian Mineralogist (1983) 21 (4): 665–681.
Journal Article
Tectonic significance of early Oligocene plutonism on Adak Island, central Aleutian Islands, Alaska
Journal: Geology
Publisher: Geological Society of America
Published: 01 August 1980
Geology (1980) 8 (8): 375–379.
...G. P. Citron; R. W. Kay; S. Mahlburg Kay; L. W. Snee; J. F. Sutter Abstract Six biotite and two hornblende separates from the Hidden Bay pluton, Adak Island, yielded K-Ar dates that cluster about an average of 33.13 ± 0.41 m.y. B.P. This average is interpreted as the time of intrusion of the pluton...
Journal Article
Tectonic implications of seismicity in the Adak Canyon region, central Aleutians
Publisher: Seismological Society of America
Published: 01 October 1979
Bulletin of the Seismological Society of America (1979) 69 (5): 1515–1532.
...R. LaForge; E. R. Engdahl abstract Adak local-network and teleseismically recorded data are used to describe shallow seismicity and tectonics in the Adak Canyon region of the central Aleutians. An examination of the locations and focal mechanisms of earthquakes up to 50 km in depth, occurring...
Journal Article
Eocene Age of the Adak ‘Paleozoic (?)’ Rocks, Aleutian Islands, Alaska
Journal: GSA Bulletin
Publisher: Geological Society of America
Published: 01 December 1970
GSA Bulletin (1970) 81 (12): 3583–3592.
...DAVID W SCHOLL; H. GARY GREENE; MICHAEL S MARLOW Abstract In 1948, several specimens identified as the plant genus Annularia, a primitive horsetail of Pennsylvanian or Permian age, were found in tuffaceous sandstone exposed near the northern end of Adak Island, Alaska. These beds form the basal...
Journal Article
Adak “Paleozoic” Site, Aleutians—In Fact of Eocene Age: ABSTRACT
David W. Scholl, H. Gary Greene, Warren O. Addicott, William R. Evitt, Richard L. Pierce, Sergius H. Mamay, Michael S. Marlow
Journal: AAPG Bulletin
Publisher: American Association of Petroleum Geologists
Published: 01 February 1969
AAPG Bulletin (1969) 53 (2): 459.
... by Robert R. Coats of the U.S. Geological Survey in tuffaceous sandstone exposed near Andrew Lake, northern Adak Island, Alaska. Because of the geographic position of these upper Paleozoic fossils near the middle of the Aleutian insular chain, it has been a challenging if not a vexing problem to fit...
Journal Article
BATHYMETRY OF ADAK CANYON, ALEUTIAN ARC, ALASKA
Journal: GSA Bulletin
Publisher: Geological Society of America
Published: 01 March 1965
GSA Bulletin (1965) 76 (3): 365–370.
...RICHARD B PERRY; HAVEN NICHOLS Abstract Bathymetric analysis of hydrographic data taken in the region of Adak Canyon on the southern slope of the Aleutian Ridge off Alaska indicates that the canyon is a distinct and important boundary between an essentially regular, convex slope to the east...
Journal Article
Analysis of Fracture Trace Pattern of Adak and Kagalaska Islands, Alaska: GEOLOGICAL NOTES
Journal: AAPG Bulletin
Publisher: American Association of Petroleum Geologists
Published: 01 February 1961
AAPG Bulletin (1961) 45 (2): 249–251.
... to publication of this analysis of their map, and to Professor John C. Griffiths for his very helpful advice. © 1961 American Association of Petroleum Geologists 1961 American Association of Petroleum Geologists Introduction .—Adak and Kagalaska Islands, in the Aleutians, have been studied...
Journal Article
MAGMATIC DIFFERENTIATION IN TERTIARY AND QUATERNARY VOLCANIC ROCKS FROM ADAK AND KANAGA ISLANDS, ALEUTIAN ISLANDS, ALASKA
Journal: GSA Bulletin
Publisher: Geological Society of America
Published: 01 May 1952
GSA Bulletin (1952) 63 (5): 485–514.
...ROBERT R COATS Abstract Samples of 17 volcanic rocks of Tertiary and Quaternary age from Adak and Kanaga islands have been chemically analyzed and studied microscopically. Spectrograms have been made of 10 of them. The rocks from Adak represent one center of possibly older Tertiary age and two...
Image
Petrogenetic discrimination and magma mixing modeling diagrams for the adak...
in Crust-Mantle Interaction Controls the Formation of High-Mg Adakitic Rocks: Evidence from Early Cretaceous Intrusive Complexes in Luxi Terrane, North China Craton
> Lithosphere
Published: 11 September 2023
Figure 11 Petrogenetic discrimination and magma mixing modeling diagrams for the adakitic porphyry samples. ( a ) Sr/Y versus SiO 2 diagram. ( b ) La/Yb versus SiO 2 diagram. ( c ) Th (ppm) versus Th/V diagram showing that the geochemical variations in the samples from the Luxi Terrane are domin
Journal Article
Genesis of coronae and implications of an early Neoproterozoic thermal event: a case study from SE Chotanagpur Granite Gneissic Complex, India
Journal: Geological Magazine
Publisher: Cambridge University Press
Published: 05 May 2020
Geological Magazine (2021) 158 (2): 199–218.
...Vedanta Adak; Upama Dutta Abstract Partial equilibrium textures such as corona provide information on changing pressure–temperature ( P - T ) conditions experienced by a rock during its geological evolution. Coronae layers may form in single or multiple stages; understanding the genesis of each...
Image
MgO vs. SiO 2 ( a ) and Mg# vs. SiO 2 ( b ) diagrams for the studied adak...
in Early Cretaceous Xiuyan adakitic granitoids in the Liaodong Peninsula, eastern China: petrogenesis and implications for lithospheric thinning of the North China Craton
> Canadian Journal of Earth Sciences
Published: 07 July 2020
Fig. 10. MgO vs. SiO 2 ( a ) and Mg# vs. SiO 2 ( b ) diagrams for the studied adakitic rocks from the Xiuyan pluton. Field of adakites inferred to be of subducting oceanic crust origin are after Defant and Drummond (1990) , Kay et al. (1993) , Xu et al. (2000) , and Yogodzinski et al. (2001)
Journal Article
Alum mud; phase identification and catalytic potential for aqueous-phase decomposition of hydrogen peroxide
Journal: Clays and Clay Minerals
Publisher: Clay Minerals Society
Published: 01 April 1999
Clays and Clay Minerals (1999) 47 (2): 234–238.
...Amit Adak; Durjoy Mallik; Swapan Khandra; Swades K. Chaudhuri GeoRef, Copyright 2004, American Geological Institute. 1999 ...
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