泸沽湖沉积物正构烷烃分布特征及其古植被意义
泸沽湖沉积物正构烷烃分布特征及其古植被意义
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WANG, Zixiang , WANG, Yongli , WU Baoxiang , WANG, Gen , SUN Zepeng , XU, Liang and SUN, Lina
Publisher
Beijing: Marine Geology and Quaternary Geology
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Chinese
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Beijing: Marine Geology and Quaternary Geology
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利用气相色谱-质谱联用仪从泸沽湖沉积物中检测出丰富的正构烷烃系列分子化石,泸沽湖沉积物正构烷烃分布特征可归纳为双峰前峰型和双峰后峰型,说明泸沽湖沉积有机质母质来源为混源。较高丰度的中等长度正构烷烃及Paq和(C15+C17+C19)/(C27+C29+C31)比值等指标指示挺水植物及沉水/漂浮植物等水生植物贡献量较大,同时,也说明较大的内源输入可能是泸沽湖TOC含量较高的原因之一。主峰碳及正构烷烃代用指标(C27+C29)/(C31+C33)比值和ACL指示泸沽湖沉积有机质木本植物输入量占优势,这与现今泸沽湖流域植被类型特征相符。纵向上,(C27+C29)/(C31+C33)比值和ACL没有明显的阶段性和趋势性变化,反映出正构烷烃记录的泸沽湖流域草本植被与木本植被相对变化不明显。不同沉积时期...
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泸沽湖沉积物正构烷烃分布特征及其古植被意义
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TN_cdi_proquest_journals_2766290120
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https://devfeature-collection.sl.nsw.gov.au/record/TN_cdi_proquest_journals_2766290120
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ISSN
0256-1492
DOI
10.3724/SP.J.1140.2015.02169
