Aeromagnetic map of part of the Naknek quadrangle, Alaska

Andreasen, Gordon E.; Dempsey, William J.; Vargo, J.L.

doi:10.3133/ofr585

Cited by 5 publications

(9 citation statements)

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“…Now that the local geology is better known, it might be profitable to re-examine those traverses which passed onto the Shumagin-Kodiak Shelf. Local aeromagnetic surveys have been made at the head of Bristol Bay (Andreasen and others, 1963a;1963b) which show interesting aspects of the local structure, and an excellent aeromagnetic summary of Cook Inlet has been presented (Grantz, Zietz, and Andreasen, 1963). Peter and others (1965) report residual anomalies of more than 1000 gammas southwest of Kodiak Island and interpret these as the result of mafic intrusions filling a fissure along the axis of the Aleutian Trench.…”

Section: Geophysical Datamentioning

confidence: 99%

“…Such a pattern could account for the distribution of plutons described earlier. There is no evidence in the Aleutian Islands that the longitudinal fractures are an expression of a northward-dipping thrust (Plafker, 1965;and others), and there are no field data on the Alaska Peninsula to suggest that the transverse and oblique faults display strike-slip movement (Menard, 1964, p. 102;and others), nor is there evidence of major wrench faulting parallel to the arc (St. Amand, 1957;and others), or of tensional gravity faults adjacent to the Bering Sea or Shumagin-Kodiak Shelf (Peter and others, 1965). While each or all of these may adequately account for the distribution of volcanoes and earthquakes, none accounts for the depression of crustal segments to receive thick deposits of sediment or for the subsequent uplift and deformation involving vertical movement along steep faults that characterize the history and structure of the Alaska Peninsula.…”

Section: Earthquakes Faults and Volcanoesmentioning

confidence: 99%

See 1 more Smart Citation

Geology of the Alaska Peninsula_ Island Arc and Continental Margin (Part 1)

Burk¹

1965

Geological Society of America Memoirs

130

265

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Section: Geophysical Datamentioning

confidence: 99%

Section: Earthquakes Faults and Volcanoesmentioning

confidence: 99%

Geology of the Alaska Peninsula_ Island Arc and Continental Margin (Part 1)

Burk¹

1965

Geological Society of America Memoirs

130

265

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“…Geophysical data can help to constrain the size of favorable host rocks for certain deposit types. In the Katmai• region, however, aeromagnetic data (Andreasen and others, 1963) are the only regionally extensive, geophysical data that are available, and these are available only for the 1978. Consequently, in 1974 Congress requested that the U.S. Geological Survey (USGS) provide information about the mineral potential of the probable withdrawals in time for Congress to use in the final decisions.…”

Section: Mineral-resource Assessments Definitions and Conceptsmentioning

confidence: 99%

Mineral-resource assessments in Alaska; background information to accompany maps and reports about the geology and undiscovered-mineral-resource potential of the Mount Katmai Quadrangle and adjacent parts of the Naknek and Afognak quadrangles, Alaska Peninsula

Riehle¹,

Church²,

Detterman³

et al. 1994

Circular

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“…No new aeromagnetic data were acquired during the Katmai AMRAP study. Andreasen and others (1963a) published aeromagnetic data from part of the Naknek quadrangle; their results are shown on plate I. The data were compiled along continuous flight lines at about a 3 krn spacing.…”

Section: Interpretation Of Aeromagnetic Data From Part Of the Naknek mentioning

confidence: 99%

Mineral and energy resource assessment maps of the Mount Katmai, Naknek, and western Afognak quadrangles, Alaska

Church¹,

Riehle²,

Magoon³

et al. 1992

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On the basis of new geologic mapping and exploration geochemical studies, we have provided a mineral and energy resource assessment of the Mount Katmai, Naknek, and western Afognak quadrangles, Alaska. We delineate four tracts of ground that have metallic mineral resources. The mineral deposit types considered in each tract are summarized in table 4. Estimates of the number of undiscovered mineral deposits have been made for porphyry copper and polymetallic vein deposits. We estimate that one undiscovered porphyry copper deposit is present in the Katmai study area at the ten percent probability level. Although the sampling density may be too low to give an accurate estimate of the number of undiscovered polymetallic vein deposits, we suggest that, at a minimum, there is a five percent probability for five or more undiscovered polymetallic vein deposits in the Katmai study area. In addition, several areas have potential for undiscovered porphyry molybdenum, massive sulfide, and epithermal gold and mercury deposits. Several placer gold claims have been filed in the area; one is still active. One claim, on American Creek, produced a small but unknown amount of gold. Several source areas for gold are identified in this study and would provide potential sources for gold in stream placer deposits given the right hydrologic conditions. Many of these sites in the Kulik Lake area have been prospected with only limited success. However, the upper reaches of lkagluik Creek and some areas of the Rainbow River in the central part of Katmai National Park may also contain undiscovered placer gold resources. Berryhill (1963) investigated the titanium-rich black sand beach placers along the coast of Bristol Bay at Egegik Bay and concluded that they did not constitute a resource for either titanium or gold. Sand and gravel deposits are locally abundant (Riehle and Detterman, in press) and are adequate to supply local demand. No cinder resources have been delineated. Energy potential evaluated during the study includes geothermal, oil and gas, and coal resources. A few warm springs were found, but no hot springs areas suitable for geothermal development exist within the study area. Better sites for geothermal resources have been identified on the Alaska Peninsula south of the study area (Smith and Shaw, 1975). The potential for commercial accumulations of oil and gas in the Naknek, Mount Katmai, and western Afognak quadrangles is low. Area E1, in the Naknek quadrangle along Bristol Bay, has low potential for thermogenic oil and gas (Church, Detterman, and Wilson, 1989). In area E2, oil seeps are along the anticlinal structures both north and south of the Katmai study area. Studies by Magoon and Anders (1992) indicate that the oil is from lower Mesozoic sedimentary rocks. Surface exposures of the Naknek Formation have uniformly indicated poor reservoir characteristics where studied, both here and in the adjacent quadrangles, and the shallow depth of burial of the Naknek Formation probably would result in flushing of the reservoir by...

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Aeromagnetic map of part of the Naknek quadrangle, Alaska

Cited by 5 publications

References 0 publications

Geology of the Alaska Peninsula_ Island Arc and Continental Margin (Part 1)

Geology of the Alaska Peninsula_ Island Arc and Continental Margin (Part 1)

Mineral-resource assessments in Alaska; background information to accompany maps and reports about the geology and undiscovered-mineral-resource potential of the Mount Katmai Quadrangle and adjacent parts of the Naknek and Afognak quadrangles, Alaska Peninsula

Mineral and energy resource assessment maps of the Mount Katmai, Naknek, and western Afognak quadrangles, Alaska

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