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题名: Mossbauer spectroscopic study on vertical distribution of iron species in sediments from Qinghai Lake, China
作者: Kuno, A ; Zheng, GD ; Matsuo, M ; Takano, B ; Shi, JA ; Wang, Q
刊名: HYPERFINE INTERACTIONS
出版日期: 2002
卷号: 141, 期号:41278, 页码:321-326
关键词: Mossbauer spectroscopy ; Qinghai Lake ; salt lake sediment ; vertical distribution ; iron speciation
学科分类: Physics, Atomic, Molecular & Chemical ; Physics, Condensed Matter ; Physics, Nuclear
英文摘要: The Xifeng oilfield is the largest newly-discovered oilfield in the Ordos basin. In order to determine the possible source, crude oils collected systematically from the oilfield and an adjacent oilfield have been examined isotopically and molecularly. The predominance of long-chain n-alkanes, high abundance of C-29 sterane, lower ratios of C-25/C-26 tricyclic terpane and C-25 tricyclic terpane/C-24 tetracyclic terpane and high C-24 tetracyclic terpane/(C-24 tetracyclic terpane + C-26 tricyclic terpanes ratio in the studied oils suggest generation from a source with mixed terrigenous and algal-bacterial organic matter. The presence of diterpenoid hydrocarbon with abietane skeletons is characteristic of the main contribution of higher land plants to the oils. The biomarker distributions in the oils show that they were formed under a weakly reducing freshwater environment. Molecular maturity parameters indicate that the crude oils are mature. The oil-source rock correlation and oil migration investigation suggest that the oils in the Xifeng oilfield originated from the source rocks of the Yanchang formation deposited in a shallow to deep freshwater lacustrine environment, especially Chang-7 source rocks. The data from the distribution of pyrrolic nitrogen compounds indicate that the charging direction of the Chang-8 crude oils is mainly from the Zhuang 12 well northeast of the oilfield toward the southwest. This direction of oil migration is consistent with that indicated by regional geological data. (c) 2007 Elsevier Ltd. All rights reserved.
收录类别: SCI
语种: 英语
内容类型: 期刊论文
URI标识: http://ir.lig.ac.cn/handle/132962/2109
Appears in Collections:油气地球化学研究室_期刊论文

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Kuno, A; Zheng, GD; Matsuo, M; Takano, B; Shi, JA; Wang, Q.Mossbauer spectroscopic study on vertical distribution of iron species in sediments from Qinghai Lake, China,HYPERFINE INTERACTIONS,2002,141(41278):321-326
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