Granites, orogeny, and the Deblois Pluton Complex in eastern Maine, United States
- 出版日期：2004.
- 页数：1 v. :
- 第一责任说明：Dean Nolan Riley.
- 分类号：a361.1 ; a243
- ISBN：0496887157(ebk.) :
MARC全文
02h0029413 20120613155755.0 cr un||||||||| 120613s2004 xx ||||f|||d||||||||eng | 3141635 0496887157(ebk.) : CNY371.35 NGL NGL NGL a361.1 ; a243 Riley, Dean Nolan. Granites, orogeny, and the Deblois Pluton Complex in eastern Maine, United States [electronic resource] / Dean Nolan Riley. 2004. 1 v. : digital, PDF file. Adviser: Barton, Michael. Thesis (Ph.D.)--The Ohio State University, 2004. Granites represent probes of the earths interior and provide information on the compositional, lithologic, and thermal characteristics of the earth, in addition to the processes that occur within the earth. They are especially useful because they occur in a variety of tectonic environments, including regions at destructive plate margins, in regions characterized by crustal extension and rifting, and within ophiolite complexes formed at divergent plate margins. Some even occur within plates, far from plate boundaries. The Northern Appalachians is an orogenic belt that contains many granitic and gabbroic plutons that intruded at various times, and provide a window into a significant part of the earths crust and mantle. The focus of this dissertation is the Deblois Pluton Complex DPC) and the associated sedimentary and metamorphic rocks. The DPC outcrops over 1680 km2 and cross-cuts two major terrane boundaries, the Turtle Head Fault, and the Sennebec Pond Fault. Furthermore, the DPC has been affected by shearing from the Norumbega Fault System. The objective of the research is to constrain the tectonic models for the Acadian-Salinic orogenies in eastern Maine. This study of the DPC involved geological mapping, structural geology, igneous and metamorphic petrology, geochemistry, geographic information system and remote sensing. The consists of DPC has Mantled Feldspar, Porphyritic, and Medium-grained granites, and a suite of two-mica granites. Feldspar accumulation appears to be the mechanism for formation of the DPC, whereas, the two-mica granites appear to formed through fractionation. The DPC intruded the crust at a shallow depth, 0.5--2.0 kbar. Medium- to high-grade metamorphic assemblages indicating Barrovian metamorphism were discovered and document the first occurrence of Kyanite in south-eastern Maine. Landsat TM and Shuttle Imaging Radar were used to aid mapping in forested areas, and they document a correlation between vegetation, mineral alteration, and outcrop location. Remote sensing methods also help unravel the structural history of the region. Granite ; Orogeny Maine. ; Maine. aeBook. aCN bNGL http://pqdt.bjzhongke.com.cn/Detail.aspx?pid=KhEawTGaiBo%3d NGL Bs1482 rCNY371.35 ; h1 bs1204