Seafloor-spreading processes in protoarc-forearc settings
- 出版日期：2004.
- 页数：1 v. :
- 第一责任说明：Charity M. Phillips.
- 分类号：a242.1 ; a360
- ISBN：0496253840(ebk.) :
MARC全文
02h0029359 20120611164458.0 cr un||||||||| 120611s2004 xx ||||f|||d||||||||eng | 1420636 0496253840(ebk.) : CNY371.35 NGL NGL NGL a242.1 ; a360 Phillips, Charity M. Seafloor-spreading processes in protoarc-forearc settings [electronic resource] : eastern Albanian ophiolite as a case study / Charity M. Phillips. 2004. 1 v. : digital, PDF file. Adviser: Dilek, Yildirim. AAdviser: Dilek, Yildirim. Thesis (M.S.)--Miami University, 2004. Northern Albania's Mirdita ophiolite displays two distinct belts of Jurassic Neotethyan oceanic crust that developed between the Apulian and Pelagonian margins. The western belt consists of an &sim；3km-thick MORB pseudostratigraphy, in which pillow lavas overlie serpentinized peridotites, suggesting tectonic extension dominated early stages of seafloor spreading. The eastern belt includes an &sim；10-km-thick complete pseudostratigraphy with extrusives that show increasing IAT chemistry upsection. Mutually intrusive relations between crustal units indicate robust magmatic spreading occurred. Four dike generations (D1--D4) exist based on structure, crosscutting relations, and texture. D1--D4 are composed of diabase dikes. D1 strike 030--060°；, dips SE, and is crosscut by NE dipping D2 dikes oriented 290--340°；. D3--D4 crosscut D1--D2 and strike of 240--290°； with northerly dips. Boninite and rhyodacite dikes intruded throughout the SDC's history because of complex magmatic processes. These relations suggest the spreading direction changed from NNE--SSW to NW--SE because of the incipient Mirdita-Pelagonia collision in the South. Sea-floor spreading. ; Ophiolites. ; Hydrothermal vents. Electronic dissertations. aeBook. aCN bNGL http://pqdt.bjzhongke.com.cn/Detail.aspx?pid=m3hVay7VNXk%3d NGL Bs1463 rCNY371.35 ; h1 bs1204