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Seismic imaging of the lithosphere b...

Yang, Xiaotao.

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Seismic imaging of the lithosphere beneath the southern Illinois Basin and its tectonic implications.

紀錄類型:	書目-電子資源 : Monograph/item
正題名/作者:	Seismic imaging of the lithosphere beneath the southern Illinois Basin and its tectonic implications./
作者:	Yang, Xiaotao.
出版者:	Ann Arbor : ProQuest Dissertations & Theses, : 2016,
面頁冊數:	231 p.
附註:	Source: Dissertation Abstracts International, Volume: 78-05(E), Section: B.
Contained By:	Dissertation Abstracts International78-05B(E).
標題:	Geophysics. -
電子資源:	http://pqdd.sinica.edu.tw/twdaoapp/servlet/advanced?query=10196148
ISBN:	9781369331509

Seismic imaging of the lithosphere beneath the southern Illinois Basin and its tectonic implications.
Yang, Xiaotao.

Seismic imaging of the lithosphere beneath the southern Illinois Basin and its tectonic implications. - Ann Arbor : ProQuest Dissertations & Theses, 2016 - 231 p.

Source: Dissertation Abstracts International, Volume: 78-05(E), Section: B.

Thesis (Ph.D.)--Indiana University, 2016.

The Illinois Basin in North America mid-continent is an intracratonic basin located near the southeastern edge of the North America craton. It is bounded by a series of structural reliefs including the Pascola Arch to the south approximately perpendicular to the Reelfoot Rift, the Ozark Dome to the southwest, the Northeastern Missouri Arch to the west, the Kankakee arch to the northeast, and the Cincinnati arch to the east. The depth of the Precambrian basement in this area varies dramatically from about 0 km in the area of the Ozark Dome to more than 7 km in the Rough Creek Graben in northwestern Kentucky. Inside the basin, the depth of the Precambrian basement top increases towards the basin depocenter around the intersection of the Reelfoot rift and the Rough Creek Graben. For decades, studies have been focused on the origin and evolution of the Illinois Basin, and the seismogenic properties of the crust in this area.

ISBN: 9781369331509Subjects--Topical Terms:

535228
Geophysics.

Seismic imaging of the lithosphere beneath the southern Illinois Basin and its tectonic implications.
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245 1 0 $a Seismic imaging of the lithosphere beneath the southern Illinois Basin and its tectonic implications.
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300 $a 231 p.
500 $a Source: Dissertation Abstracts International, Volume: 78-05(E), Section: B.
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500 $a Adviser: Gary L. Pavlis.
502 $a Thesis (Ph.D.)--Indiana University, 2016.
520 $a The Illinois Basin in North America mid-continent is an intracratonic basin located near the southeastern edge of the North America craton. It is bounded by a series of structural reliefs including the Pascola Arch to the south approximately perpendicular to the Reelfoot Rift, the Ozark Dome to the southwest, the Northeastern Missouri Arch to the west, the Kankakee arch to the northeast, and the Cincinnati arch to the east. The depth of the Precambrian basement in this area varies dramatically from about 0 km in the area of the Ozark Dome to more than 7 km in the Rough Creek Graben in northwestern Kentucky. Inside the basin, the depth of the Precambrian basement top increases towards the basin depocenter around the intersection of the Reelfoot rift and the Rough Creek Graben. For decades, studies have been focused on the origin and evolution of the Illinois Basin, and the seismogenic properties of the crust in this area.
520 $a The results presented in this dissertation are based on the observations from the EarthScope OIINK (Ozarks-Illinois-Indiana-Kentucky) Flexible Array experiment in the southern Illinois Basin area. The following topics were investigated: 1) Seismicity. The presence of the dense OIINK stations lowers the earthquake detection limit from magnitude 2.3 to about 1.8 within the Ste. Genevieve seismic zone (SGSZ). Earthquakes in the SGSZ typically occur at the depth range of 0-22 km, contrasting with the concentration at 5-12 km in the New Madrid seismic zone (NMSZ). The seismicity rate in the SGSZ, comparable to that of the neighboring Wabash Valley seismic zone, is a factor of 3 to 4 times lower than that of the NMSZ. Focal mechanism analysis indicates that seismicity in the SGSZ may be a response to the NE-SW trending regional stress. 2) Receiver function quality control. A quality control method has been developed based on deconvolution attributes, waveform characteristics, and statistical metrics. The automated method is implemented as a computer program name RFeditor, consisting of 13 quality control procedures. This method significantly improves the accuracy, efficiency, and reproducibility of receiver function quality controls. 3) Crustal velocity structures. Seismic imaging results using both Common Conversion Point stacking method and the higher-resolution Plane-Wave Migration technique suggest strong variations of the Moho topography in southern Illinois Basin area. Relatively thick crust is observed beneath the Sparta shelf. The Ste. Genevieve fault zone and the Du Quoin monocline may be surface manifestations of deep crustal-scale structures. High magnetic anomalies in Sparta Shelf region indicate the possibility of lower crust underplating. Relatively thin crust is identified beneath both Ozark plateau and Rough Creek graben, with contrasting crustal thinning mechanisms. In the Rough Creek graben, the crust underwent horizontal stretching under extensional stresses, while the Ozark plateau may result from the upwelling of mantle materials or westward tilting of the whole block.
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