On the occurrence of basalt dikes in the upper Paleozoic series in central Appalachian Virginia; with notes on the petrography by J. S. Diller

Darton, Nelson Horatio; Diller, Joseph Silas

doi:10.2475/ajs.s3-39.232.269

Cited by 6 publications

(4 citation statements)

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“…Mafic igneous rocks of probable Trlassic age have been known in Pendleton County, W. Va. and in neighboring Highland County, Va., since they were first publicized by Darton and Diller (1890). Igneous activity continued intermittently on the Virginia side with the intrusion in Jurassic time of felsic alkalic rocks and in Eocene time of more mafic rocks once again (Garnar, 1956;Dennison and Johnson, 1969;Rader and others, 1986).…”

Section: Geologymentioning

confidence: 99%

Evidence for a titaniferous diatreme or alkalic igneous rock in the subsurface, Harrison, Taylor, and Doddridge Counties, West Virginia

Watts¹,

Hinkle²,

Griffitts³

1992

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Fe, and V; (2) elliptical in plan on the basis of a contour plot, and crosscuts the regional stratigraphic trends; (4) located on the edge of the Silurian evaporite basin; (5) associated with large-scale, northwesterly-trending LANDSAT lineaments; (6) localized on an intersection of a major northeasterly zone of right-lateral transcurrent faulting, and a northwesterly-trending zone of cross-faulting, fracturing, and jointing manifested by abrupt changes in strike of major structural elements; (7) between two large aeromagnetic highs, reflecting mafic basement rocks. (8) associated with gamma-ray anomalies in deep subsurface oil and gas well logs, and (8) associated with a linear zone of fluorine anomalies in water wells entering the area from the south parallel to the transcurrent faults and fold axes. At the regional scale (1:1,000,000) anomaly A is defined by a cluster of discrete titanium highs that coincide with a regional anomaly zone of cerium, lanthanum, thorium, iron, and manganese. Northeasterly-trending regional anomalies of lanthanum and thorium make a sharp departure to the northwest in the area of anomaly A, coinciding with crossfaults of like trend and deflection of fold axes. In detail, recontoured at a 1:500,000 scale, the circular clusters of regional titanium highs become a spectacularily high contrast, elliptical titanium pattern with a northwest-trending long axis of about 38 miles. Mafic-ultramafic igneous occurrences in the region could have affinities to anomaly A. (1) To the northeast in Pennsylvania, on structural alignment with anomaly A, mica peridotite dikes intrude the coal measure sequence. One of these occurrences at Masontown, Fayette County is dated at about 185 Ma. The second dike occurrence in the coal measure sequence at Dixonville, Pennsylvania has not been dated to our knowledge. Both occurrences in Pennsylvania are on the flanks of the Chestnut Ridge anticline, which also crosses anomaly A. (2) Several occurrences of northwesterly-trending alkalic mafic and felsic dikes of Jurassic to Eocene age are intruded into joint sets southeast of anomaly A in Pendleton County, West Virginia. This same structural trend crosses anomaly A. The many geological and geochemical similarities of anomaly A to the rift-related alkalic intrusions, carbonatites, and diatremes of the Illinois-Kentucky mining district, southeastern Missouri, and Magnet Cove, Arkansas leads us to conclude that the anomaly is due to a diatreme in the subsurface. We discuss several recommendations for follow-up investigation. Anomaly A warrants further investigation for possible diatreme-related mineralization (fluorite, sulfides, barite, REE, niobium, and tin, as well as Ti). The titanium distribution suggests that titanium minerals and associated REE minerals are being shed from bedrock near the upper reaches of tributary streams. Titanium and rare earth-bearing minerals are then distributed down-drainage to form placers at stream confluences, and in downstream areas where gradient flattens.

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Section: Geologymentioning

confidence: 99%

Evidence for a titaniferous diatreme or alkalic igneous rock in the subsurface, Harrison, Taylor, and Doddridge Counties, West Virginia

Watts¹,

Hinkle²,

Griffitts³

1992

Open-File Report

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“…Mafic igneous rocks of probable Triassic age have been found in Pendleton County, West Virginia and neighboring Highland County, Virginia (Darton and Diller, 1890). The intrusion of felsic alkalic rocks during the Jurassic and the intrusion of more mafic rocks once again during the Eocene (Garnar, 1956;Dennison and Johnson, 1971;Rader and others, 1986) indicate the continuation of intermittent igneous activity in eastern West Virginia and adjacent Virginia over a long time span.…”

Section: Geologymentioning

confidence: 98%

Summary and interpretive geochemical maps of West Virginia

Watts¹,

Hinkle²,

Griffitts³

1994

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“…The igneous rocks were first recognized by Rogers (1884) and have been studied by Darton and Diller (1890), Darton (1894Darton ( , 1899, Darton and Keith (1898) (1933), Johnson and Milton (1955), Garner (1956), Core (1971), Johnson and others (1971), Sutler (1976), Gray and Diecchio (1983;unpub. data, 1992), Rader and others (1986), and Gray and Gottfried (1986).…”

Section: Eocene Intrusive Igneous Rocksmentioning

confidence: 99%

“…2). These intrusive rocks were long thought to be Mesozoic (Darton and Diller, 1890;Johnson and Milton, 1955;and Zartman and others, 1967). However, in an attempt to date the Devonian Tioga Ash Bed (Johnson and others, 1971;Dennison, 1975), Fullagar and Bottino (1969) dated an andesite sill (fig.…”

mentioning

confidence: 98%

Principal oil and gas plays in the Appalachian Basin (Province 131)

Witt¹

1993

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FIGURES 1,2. Maps showing: 1. The surface extent of the Appalachian basin 12 2. Locations of some structural features and places mentioned in the text 14 3. Generalized geologic map of the Appalachian basin 16 4. Penetration chart showing age and position of source beds, reservoir rocks, and principal oil and gas plays in the Appalachian basin 17 5. Schematic cross section athwart the Appalachian basin 110 6-13. Maps showing: 6. The structure on top of the autochthonous Precambrian basement complex under the Appalachian basin 111 7. Conodont color alteration index isograds in the Appalachian basin 112 8. The Upper Devonian sandstone play 117 9. The Lower Devonian Oriskany play 120 10. The Lower Silurian sandstone play 123 11. The Ordovician carbonate shelf play 127 12. The Upper Cambrian and Lower Ordovician Knox carbonate shelf play 130 13. The Rome trough play 133TABLE 1. The relative stratigraphic position of rock units mentioned in the text 18 Contents III EVOLUTION OF SEDIMENTARY BASINS-APPALACHIAN BASIN Principal Oil and Gas Plays in the Appalachian Basin (Province 131

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On the occurrence of basalt dikes in the upper Paleozoic series in central Appalachian Virginia; with notes on the petrography by J. S. Diller

Cited by 6 publications

References 0 publications

Evidence for a titaniferous diatreme or alkalic igneous rock in the subsurface, Harrison, Taylor, and Doddridge Counties, West Virginia

Evidence for a titaniferous diatreme or alkalic igneous rock in the subsurface, Harrison, Taylor, and Doddridge Counties, West Virginia

Summary and interpretive geochemical maps of West Virginia

Principal oil and gas plays in the Appalachian Basin (Province 131)

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