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DOI	10.1007/s00531-018-01675-6
	Interpretation of source rock depositional environment and age from seep oil; east coast of New Zealand
	Burton Z.F.M.; Moldowan J.M.; Magoon L.B.; Sykes R.; Graham S.A.
发表日期	2019
ISSN	14373254
起始页码	1079
结束页码	1091
卷号	108 期号:4
英文摘要	Biomarker fingerprints of crude oil samples from four onshore East Coast Basin oil seeps were analyzed to assess source rock characteristics including type of organic matter input, redox conditions, sedimentary facies, and age. Results show that samples generally form two groups, correlating with geographic location: a northern and a southern group. Source rocks associated with all seep samples are interpreted to be marine. However, results suggest northern samples had more terrigenous organic matter input to their source rock(s), while southern samples had more marine input. Results suggest northern sample source rock(s) had more oxic depositional environments, whereas southern sample source rock had more reducing environments. A shale source rock sedimentary facies was indicated for all samples. These observations suggest that southern samples may be derived from slightly higher quality source rocks (higher HI, deposited in more reducing conditions), although source rocks in both regions are oil prone. Biomarker age parameters suggest that the northern oil samples are from a younger (Cenozoic) source rock, whereas the southern oil samples are from an older (Cretaceous) source rock. Source rock characteristics (depositional environment and age) point to the presence of two different source rocks. We postulate that northern oils samples from younger source rock with more terrigenous organic matter input represent the upper Paleocene Waipawa Formation, whereas southern oil samples from older source rock with more marine organic matter input represent the Upper Cretaceous to Paleocene Whangai Formation. © 2019, Geologische Vereinigung e.V. (GV).
英文关键词	Age; Depositional environment; East Coast Basin; New Zealand; Oil seeps; Source rock
语种	英语
来源期刊	International Journal of Earth Sciences
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/147848
作者单位	Department of Geological Sciences, Stanford University, Stanford, CA 94305, United States; Biomarker Technologies Incorporated, Rohnert Park, CA 94928, United States; GNS Science, Lower Hutt, 5040, New Zealand
推荐引用方式 GB/T 7714	Burton Z.F.M.,Moldowan J.M.,Magoon L.B.,et al. Interpretation of source rock depositional environment and age from seep oil; east coast of New Zealand[J],2019,108(4).
APA	Burton Z.F.M.,Moldowan J.M.,Magoon L.B.,Sykes R.,&Graham S.A..(2019).Interpretation of source rock depositional environment and age from seep oil; east coast of New Zealand.International Journal of Earth Sciences,108(4).
MLA	Burton Z.F.M.,et al."Interpretation of source rock depositional environment and age from seep oil; east coast of New Zealand".International Journal of Earth Sciences 108.4(2019).