Interpretation of an Aeromagnetic Strip across the Northwestern United States

Zietz, Isadore; Hearn, B.C.; Higgins, Michael W.; Robinson, G. D; Swanson, Donald A.

doi:10.1130/0016-7606(1971)82[3347:ioaasa]2.0.co;2

Cited by 28 publications

(8 citation statements)

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“…Mayhew (1985) shows a minor northwest excursion of this high that trends across southeastern Washington, reflecting the position of the Rattlesnake-Wallula alignment segment of the OWL proposed by Raisz (1945). Zietz et al (1971) also show generally higher magnetic intensities in this area that extends from near Yakima, Washington, toward the Walla Walla, Washington, and Pendleton, Oregon, areas, and then northeastward to Clarkston, Washington. Zietz et al (1971) refer to this feature as the Columbia arc and attribute the eastern high to the presence of pre-Tertiary basement lithologies (e.g., Clearwater Embayment of .…”

Section: Regional Magnetic Settingmentioning

confidence: 72%

“…General magnetic characteristics of the area surrounding the Columbia Basin include a broad, magnetic low associated with most of Idaho (Sexton et al 1982;Mayhew and Galliher 1982). The extension of this low into the Columbia Basin (see Zietz et al 1971) suggests some similarities between the subsurface lithologies of Idaho and the Columbia Basin as far as 120°W longitude. This magnetic low is probably a reflection of the cratonic rocks in this area.…”

Section: Regional Magnetic Settingmentioning

confidence: 97%

“…In summary, the Columbia Basin does not exhibit any strong magnetic response in the abovementioned data sets, although regional trends are apparent. Zietz et al (1971) present the results of an aeromagnetic survey that was flown at 4,600 m over the Columbia Basin and surrounding regions. Their data show the same general characteristics as the MAGNET aeromagnetic data reported by Sexton et al (1982), except that the data compiled by Zietz et al exhibit higher amplitude anomalies.…”

Section: Regional Magnetic Settingmentioning

confidence: 99%

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Natural Gas Storage in Basalt Aquifers of the Columbia Basin, Pacific Northwest USA: A Guide to Site Characterization

Reidel¹,

Spane²,

Johnson³

2002

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Section: Regional Magnetic Settingmentioning

confidence: 72%

Section: Regional Magnetic Settingmentioning

confidence: 97%

Section: Regional Magnetic Settingmentioning

confidence: 99%

See 1 more Smart Citation

Natural Gas Storage in Basalt Aquifers of the Columbia Basin, Pacific Northwest USA: A Guide to Site Characterization

Reidel¹,

Spane²,

Johnson³

2002

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“…3) is the Alleghanian suture between Africa or South America and North America. Hatcher (1978), Zietz and Higgins (1980), and Bobyarchick (1980) have suggested that the suture is somewhere in this general vicinity beneath the Coastal Plain.…”

Section: Interpretationsmentioning

confidence: 99%

Geologic interpretation of geophysical maps of the pre-Cretaceous “basement” beneath the Coastal Plain of the Southeastern United States

Higgins¹,

Zietz²

1983

Geological Society of America Memoirs

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Salient features of the new aeromagnetic map of the Southeastern UnitedStates (Zietz and Gilbert, 1980) are: (1) the Charleston magnetic terrane that is generally high magnetically and has numerous distinct, very high magnetic anomalies within it; (2) the northern Florida magnetic terrane that is virtually identical magnetically to the Charleston magnetic terrane; (3) a linear series of magnetic low anomalies within a continuous magnetic low anomaly, collectively called the Altamaha magnetic anomaly, that is more than 1,150 km long and that arcs across the Continental Shelf, from about 33°30'N., 76°30'W., to the Georgia coastline at the mouth of the Altamaha River and trends inland across southern Georgia and Alabama; (4) the southern end of the East Coast anomaly and its shoreward branch, the Brunswick anomaly, which is part of the northern Florida terrane; (5) the characteristic magnetic terranes of the Piedmont and Valley and Ridge provinces; (6) the southern end of the New York-Alabama lineament and the magnetically high terrane west of it; and (7) the lineament formed by the nearly straight northwestern margin of the Charleston magnetic terrane in South Carolina and Georgia, the northwestern margin of the Altamaha anomaly, and the southern margin of the magnetically high terrane northwest of the New York-Alabama lineament in Alabama.A newly compiled gravity map of part of the Southeastern United States shows that the Charleston and northern Florida magnetic terranes have mixed gravity expression, with gravity high anomalies coinciding with the distinct, very high anomalies on the aeromagnetic map. In general, the trace of the Altamaha magnetic anomaly either coincides with or lies just south of gravity low anomalies that are linear and form a linear series along or closely parallel to the magnetic anomaly. Near its northeastern end, the Altamaha magnetic anomaly lies along a relatively steep, northwestward-sloping gravity gradient. The East Coast anomaly coincides with linear gravity high anomalies.The Charleston and northern Florida magnetic terranes are interpreted as being virtually the same geologic terrane, a predominantly mafic terrane, intruded 125 on June 21, 2015 memoirs.gsapubs.org Downloaded from 126 M. W. Hìggins and I. Zietz by mafic plutons of batholithic proportions, that, until late Paleozoic time, was part of the African or African/South American plate. The northwestern margin of the Charleston terrane is interpreted as the Alleghanian suture between Africa and North America, and also as a major strike-slip fault, the Carolina-Mississippi fault, that extends to the southwest along the northwestern border of the Altamaha anomaly and the southern border of the magnetically high terrane northwest of the New York-Alabama lineament. The Altahama anomaly is interpreted as being caused by a fault-bounded, sediment-filled trough, locally as deep as 6 km, that divides the Charleston-northern Florida terrane. The Carolina-Mississippi fault truncates the Charleston terrane, the Piedmont and Valley a...

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“…Faults can also affect the potentiometric surface. However, except for the Weldon fault to the north and a fault associated with the Cedar Creek anticline on the east, the only evidence for faulting in this area is Zietz, Hearn, Higgins, Robinson, and Swanson (1971) and Brinkworth and Kleinkopf (1972). Their aeromagnetic and gravity maps show anomalies that might be interpreted as faults, which occur along the western and southwestern parts of the potentiometric low on plate 1A.…”

Section: Potentiometric Surface and Movement Of Watermentioning

confidence: 96%

Water in carbonate rocks of the Madison Group in southeastern Montana: A preliminary evaluation

Miller¹

1976

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The Madison Group of Mississippian age comprises, from oldest to youngest, the Lodgepole and Mission Canyon Limestones and the Charles Formation. The Madison crops out in the Bighorn and Pryor Mountains and in the mountains west of the study area. These rocks consist of cyclically deposited normal-marine carbonates and restricted-marine carbonates and evaporites. The Madison ranges in thickness from about 700 feet (210 metres) in the Bighorn Mountains to about 2,000 feet (610 metres) in the Williston basin. The top of the Madison ranges in depth from land surface in the mountains to about 10,000 feet (3,000 metres) below land surface along the Montana-Wyoming border. The potentiometric surface of water in the Madison Group slopes northeastward from the outcrops. Potentiometric lows occur in the Cat Creek anticline-Porcupine dome area along the Bighorn River and at the north end of Powder River basin. Potentiometric highs occur in outcrop areas, on the interstream divide between the Bighorn, Tongue, and Yellowstone Rivers, and along the Cedar Creek anticline. The potentiometric surface ranges from 1,200 feet (370 metres) below land surface in the topographically high areas in the southern part of the area to 1,000 feet (300 metres) above land surface along the Yellowstone River. Yields from wells range from about 50 gallons per minute (3 litres per second) at several places to a reported 1,400 gallons per minute (88 litres per second) from a flowing well on the north side of the Porcupine dome. Yields estimated or reported from drill-stem tests range from about 1 to 157 gallons per minute (0.1 to 9.9 litres per second). Water from the Madison generally contains less than 3,000 milligrams per litre dissolved solids south of T. IN., and from 3,000 to 10,000 milligrams per litre in most of the remaining area; in the Williston basin the concentration increases to more than 100,000 milligrams per litre. In the southeastern and southwestern parts of the area, calcium, magnesium, and sulfate ions constitute more than 75 percent of the dissolved constituents, in milliequivalents per litre. North of about T. 8 N., sodium, potassium, and chloride ions constitute more than 50 percent of the dissolved constituents; in the Williston basin, sodium, potassium, and chloride ions constitute more than 75 percent of the total.

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Interpretation of an Aeromagnetic Strip across the Northwestern United States

Cited by 28 publications

References 0 publications

Natural Gas Storage in Basalt Aquifers of the Columbia Basin, Pacific Northwest USA: A Guide to Site Characterization

Natural Gas Storage in Basalt Aquifers of the Columbia Basin, Pacific Northwest USA: A Guide to Site Characterization

Geologic interpretation of geophysical maps of the pre-Cretaceous “basement” beneath the Coastal Plain of the Southeastern United States

Water in carbonate rocks of the Madison Group in southeastern Montana: A preliminary evaluation

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