| DOI: | 10.1306/10210909102
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| Scopus记录号: | 2-s2.0-79951523805
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| 论文题名: | Dating petroleum emplacement by illite40Ar/39Ar laser stepwise heating |
| 作者: | Yun J.-B.; Shi H.-S.; Zhu J.-Z.; Zhao L.-H.; Qiu H.-N.
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| 刊名: | AAPG Bulletin
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| ISSN: | 0149-1931
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| EISSN: | 1558-9661
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| 出版年: | 2010
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| 发表日期: | 2010
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| 卷: | 94, 期:6 | | 起始页码: | 759
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| 结束页码: | 771
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| 语种: | 英语
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| Scopus关键词: | AR method
; Ar-laser
; Authigenic
; Clean up
; Forming process
; Gas fields
; High temperature
; Hydrocarbon accumulation
; K-feldspar
; Low temperatures
; Organic gas
; Pearl River Mouth basin
; Sandstone samples
; South China Sea
; Stepwise heating
; Weighted mean
; Zhujiang
; Argon
; Clay minerals
; Feldspar
; Gas industry
; Heating
; Hydrocarbons
; Petroleum prospecting
; Sandstone
; Silicate minerals
; Structural geology
; Argon lasers
; argon isotope
; argon-argon dating
; data set
; feldspar
; heating
; hydrocarbon
; illite
; low temperature
; petroleum
; plateau
; sandstone
; China
; Guangdong
|
| Scopus学科分类: | Energy
; Earth and Planetary Sciences
|
| 英文摘要: | The timing of petroleum emplacement is crucial in understanding petroleum-forming processes and predicting new prospecting regions. This study investigates the possibility of determining the age of petroleum emplacement by an illite 40Ar/39Ar laser stepwise heating technique. A specially designed apparatus has been used to clean up the organic gases in samples contaminated with residues from oil or gas fields, resulting in credible 40Ar/39Ar data. The sandstone samples are from the Zhuhai and Zhujiang formations in the Huizhou sag in the Pearl River Mouth Basin, South China Sea. Illite 40Ar/39Ar laser stepwise heating consistently yields gradually rising age spectra at the low-temperature steps until reaching age plateaus at high-temperature steps. The first-step apparent ages of the six samples from the Zhujiang formation give a weighted mean age of 11.4 ± 0.5 Ma (1σ), in agreement with an age of 12.1 ± 1.1 Ma in the first three steps of the sample from the Zhuhai Formation. These dates are interpreted as being caused by the formation of fine authigenic illite and therefore indicative of the maximum age of petroleum emplacement in the Huizhou sag because illite is commonly one of the latest forming minerals prior to hydrocarbon accumulation. The plateau ages ranging from 58 to 276 Ma in high laser-output steps are interpreted as being caused by variable contributions from detrital K feldspar in the sandstones. The older total ages based on the illite 40Ar/39Ar stepwise heating results are equal to the K-Ar ages and are not usable in delineating petroleum emplacement because they represent mixtures with variable contributions from authigenic illite and detrital K feldspar. The 40Ar/39Ar stepwise heating technique thus can be applied to resolve important petroleum emplacement age information from illite samples that otherwise cannot be provided by traditional K-Ar methods. Copyright ©2010. The American Association of Petroleum Geologists. All rights reserved. |
| URL: | https://www.scopus.com/inward/record.uri?eid=2-s2.0-79951523805&doi=10.1306%2f10210909102&partnerID=40&md5=b429535364e0c70504558a44bb62a8f8
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| Citation statistics: |
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| 资源类型: | 期刊论文
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| 标识符: | http://119.78.100.158/handle/2HF3EXSE/13500
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| Appears in Collections: | 过去全球变化的重建
影响、适应和脆弱性
科学计划与规划
气候变化与战略
全球变化的国际研究计划
气候减缓与适应
气候变化事实与影响
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| Recommended Citation: | |
Yun J.-B.,Shi H.-S.,Zhu J.-Z.,et al. Dating petroleum emplacement by illite40Ar/39Ar laser stepwise heating[J]. AAPG Bulletin,2010-01-01,94(6)
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