English  |  正體中文  |  简体中文  |  Items with full text/Total items : 67621/67621 (100%)
Visitors : 23046882      Online Users : 356
RC Version 7.0 © Powered By DSPACE, MIT. Enhanced by NTU Library IR team.
Scope Tips:
  • please add "double quotation mark" for query phrases to get precise results
  • please goto advance search for comprehansive author search
  • Adv. Search
    HomeLoginUploadHelpAboutAdminister Goto mobile version


    Please use this identifier to cite or link to this item: http://ir.lib.ncu.edu.tw/handle/987654321/50538


    Title: Nitrogen as the carrier gas for helium emission along an active fault in NW Taiwan
    Authors: Hong,WL;Yang,TF;Walia,V;Lin,SJ;Fu,CC;Chen,YG;Sano,Y;Chen,CH;Wen,KL
    Contributors: 地球科學系
    Keywords: GREAT ARTESIAN BASIN;TATUN-VOLCANO GROUP;SOIL-GAS;NORTHERN TAIWAN;SW TAIWAN;EARTHQUAKE PREDICTION;KOBE EARTHQUAKE;SOUTHERN TAIWAN;MASS-TRANSPORT;NOBLE-GASES
    Date: 2010
    Issue Date: 2012-03-27 17:36:24 (UTC+8)
    Publisher: 國立中央大學
    Abstract: Variations of He gas concentration are widely applied in studies devoted to the location of faults and to monitor seismic activities. Up to now, its migration mechanism in soil is not fully understood. A systematic soil gas survey across an active fault in NW Taiwan provides the opportunity to closely examine the mechanism of He migration in the fault zone. Significant spatial and temporal correlations observed between soil N(2) and He gas support the hypothesis that N(2) is the probable carrier gas for He emission in the studied area. Based on N(2)/Ar ratios and N(2) isotopic results, the excess soil N(2) in this study is considered to be largely derived from ancient atmospheric air which was dissolved in groundwater. Furthermore, observations rule out the possibility of CO(2) being the dominant carrier gas for He in the studied area based on the C and He isotopic compositions and the relationship between concentrations of these gases. At least two soil gas sources. A and B, can be identified in the studied area. Source A is an abiogenic gas source characterized by excess N(2) and He, and very low O(2) and CO(2) content. Source B, on the other hand, is a mixture of biogenic gas and atmospheric air. The development of the fault system is an important factor affecting the degree of mixture between sources A and B. Therefore, variations of soil gas composition, in particular those derived from source A, could be a useful proxy for tracing faults in the area. (C) 2010 Elsevier Ltd. All rights reserved.
    Relation: APPLIED GEOCHEMISTRY
    Appears in Collections:[地球科學學系] 期刊論文

    Files in This Item:

    File Description SizeFormat
    index.html0KbHTML523View/Open


    All items in NCUIR are protected by copyright, with all rights reserved.

    社群 sharing

    ::: Copyright National Central University. | 國立中央大學圖書館版權所有 | 收藏本站 | 設為首頁 | 最佳瀏覽畫面: 1024*768 | 建站日期:8-24-2009 :::
    DSpace Software Copyright © 2002-2004  MIT &  Hewlett-Packard  /   Enhanced by   NTU Library IR team Copyright ©   - Feedback  - 隱私權政策聲明