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003 OCoLC;

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008 150831s2015 ncuab ob 000 0 eng d;

035 a| (Sirsi) o919448360;

035 a| (OCoLC)919448360;

043 a| n-us-ut;

049 a| EREE;

090 a| QE611;

100 1 a| Maurer, Elizabeth Anna,e| author.?| UNAUTHORIZED;

245 10 a| Geometry and construction history of the Copper Ridge laccolith, Mount Ellen, Henry Mountains, Utah /c| by Elizabeth Anna Maurer.;

264 1 a| [Greenville, N.C.] :b| [East Carolina University],c| 2015.;

300 a| 122 pages :b| illustrations (some color), maps (some color);

336 a| textb| txt2| rdacontent;

337 a| computerb| c2| rdamedia;

338 a| online resourceb| cr2| rdacarrier;

347 a| text fileb| PDFc| 9.87Mb2| rda;

538 a| System requirements: Adobe Reader.;

538 a| Mode of access: World Wide Web.;

502 b| M.S.c| East Carolina Universityd| 2015.;

500 a| Presented to the faculty of the Department of Geological Sciences.;

500 a| Advisor: Eric Horsman.;

500 a| Title from PDF t.p. (viewed September 22, 2015).;

520 3 a| The Copper Ridge laccolith is an asymmetric tongue-shaped intrusion located on the southeastern margin of Mount Ellen in the Henry Mountains, Utah. The late-Oligocene to early-Miocene igneous rocks have no syn- or post-emplacement tectonic overprint. In addition, exposure of the laccolith is exceptional: well-preserved sedimentary strata cap the intrusion, the lower contact is locally exposed, and numerous natural cross sections can be studied. These characteristics make the Copper Ridge laccolith an ideal location to study emplacement of magma in the shallow crust. Field mapping shows the intrusion is about 3.5 km wide, 2.0 km long and, at its thickest point, 425 m thick. The estimated magma volume is about 2.9 km³. Field work, crystal size distribution, and geochemistry, suggest that the intrusion was built incrementally through the injection of two separate magma batches, resulting in an upper and a lower sheet. Field work shows that the upper sheet is separated from the lower sheet by well-preserved, variably metamorphosed Cretaceous Tununk shale. Data from anisotropy of magnetic susceptibility analysis suggest a subhorizontal sill fed the intrusion from the west-northwest, and magma flowed to the southeast in a fanning pattern. X-ray diffraction data show that the preserved Tununk experienced low-grade contact metamorphism. Multiple data sets suggest a construction model in which the upper sheet intruded first, lifting and deforming the sedimentary strata. The lower sheet intruded second and off center relative to the upper sheet. The asymmetric lifting caused the upper sheet to fracture adjacent to the southern margin of the lower sheet. The fractures likely facilitated weathering and erosion, causing the upper sheet to appear segmented in current exposure.;

504 a| Includes bibliographical references.;

650 0 a| Intrusions (Geology)z| Utahz| Henry Mountains.=| ^A203662;

650 0 a| Laccoliths.=| ^A235978;

650 0 a| Magmas.=| ^A403158;

650 0 a| Geologyz| Utahz| Henry Mountains.=| ^A21512;

650 0 a| Igneous rocksz| Utahz| Henry Mountains.=| ^A16487;

651 0 a| Henry Mountains (Utah)=| ^A80899;

653 a| Geology;

700 1 a| Horsman, Eric,e| degree supervisor.?| UNAUTHORIZED;

710 2 a| East Carolina University.b| Department of Geological Sciences.=| ^A1066239;

856 40 z| Access via ScholarShipu| http://hdl.handle.net/10342/5020;

949 o| jgml;

994 a| C0b| ERE;

596 a| 1 4;

998 a| 3808162;

999 a| CLICK ON WEB ADDRESSw| ASISc| 1i| 3808162-1001l| JNETm| JOYNERr| Ys| Yt| JNE3ETDu| 8/31/2015x| ETDz| JERESOURCE;

999 a| CLICK ON WEB ADDRESSw| ASISc| 1i| 3808162-2001l| HSLELECm| HSLr| Ys| Yt| HEETDu| 8/31/2015x| ETDz| HERESOURCE;

Geometry and construction history of the Copper Ridge laccolith, Mount Ellen, Henry Mountains, Utah / by Elizabeth Anna Maurer.

Author/creator	Maurer, Elizabeth Anna author.
Other author	Horsman, Eric, degree supervisor.
Other author	East Carolina University. Department of Geological Sciences.
Format	Theses and dissertations
Publication	[Greenville, N.C.] : [East Carolina University], 2015.
Description	122 pages : illustrations (some color), maps (some color)
Supplemental Content	Access via ScholarShip
Subjects	Intrusions (Geology)--Utah. --Henry Mountains. Laccoliths. Magmas. Geology--Utah. --Henry Mountains. Igneous rocks--Utah. --Henry Mountains. Henry Mountains (Utah)

Summary	The Copper Ridge laccolith is an asymmetric tongue-shaped intrusion located on the southeastern margin of Mount Ellen in the Henry Mountains, Utah. The late-Oligocene to early-Miocene igneous rocks have no syn- or post-emplacement tectonic overprint. In addition, exposure of the laccolith is exceptional: well-preserved sedimentary strata cap the intrusion, the lower contact is locally exposed, and numerous natural cross sections can be studied. These characteristics make the Copper Ridge laccolith an ideal location to study emplacement of magma in the shallow crust. Field mapping shows the intrusion is about 3.5 km wide, 2.0 km long and, at its thickest point, 425 m thick. The estimated magma volume is about 2.9 km³. Field work, crystal size distribution, and geochemistry, suggest that the intrusion was built incrementally through the injection of two separate magma batches, resulting in an upper and a lower sheet. Field work shows that the upper sheet is separated from the lower sheet by well-preserved, variably metamorphosed Cretaceous Tununk shale. Data from anisotropy of magnetic susceptibility analysis suggest a subhorizontal sill fed the intrusion from the west-northwest, and magma flowed to the southeast in a fanning pattern. X-ray diffraction data show that the preserved Tununk experienced low-grade contact metamorphism. Multiple data sets suggest a construction model in which the upper sheet intruded first, lifting and deforming the sedimentary strata. The lower sheet intruded second and off center relative to the upper sheet. The asymmetric lifting caused the upper sheet to fracture adjacent to the southern margin of the lower sheet. The fractures likely facilitated weathering and erosion, causing the upper sheet to appear segmented in current exposure.
General note	Presented to the faculty of the Department of Geological Sciences.
General note	Advisor: Eric Horsman.
General note	Title from PDF t.p. (viewed September 22, 2015).
Dissertation note	M.S. East Carolina University 2015.
Bibliography note	Includes bibliographical references.
Technical details	System requirements: Adobe Reader.
Technical details	Mode of access: World Wide Web.

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Geometry and construction history of the Copper Ridge laccolith, Mount Ellen, Henry Mountains, Utah / by Elizabeth Anna Maurer.

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