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Document Type:Latin Dissertation
Language of Document:English
Record Number:54105
Doc. No:TL24059
Call number:‭1455503‬
Main Entry:Angela E. Ribeiro
Title & Author:Geological transect through the Hangay-Hentey Basin: Implications for the contraction of the Mongol-Okhotsk Ocean, MongoliaAngela E. Ribeiro
College:California State University, Long Beach
Date:2008
Degree:M.S.
student score:2008
Page No:160
Abstract:The Hangay Hentey (H-H) Basin may hold key evidence of the tectonic setting and history of the Mongol-Okhotsk (M-O) ocean basin. Due to the tectonic complexity of the region, the history, basin type, closure and location of the M-O ocean are key to unraveling the tectonic history of the Central Asian Orogenic Belt. This study provides lithologic and sedimentological evidence through a series of measured stratigraphic sections distributed across ∼400 kilometers of the H-H Basin. These data are used in conjunction with petrographic analyses and high-precision geochronologic dating of detrital-zircon. Approximately 75% of the zircon grains are Lower Carboniferous age; the source being the Carboniferous calc-alkaline magmatic arc located in northern Mongolia and southern Russia. This age distribution characterizes the sediment package of the H-H Basin as being deposited in an isolated forearc that was subsequently incorporated into a subduction-accretion complex along the northern edge of the Mongolian continental block.
Subject:Earth sciences; Geology; 0372:Geology
Added Entry:T. Kelty
Added Entry:California State University, Long Beach