气候变化领域集成服务门户(CCPortal): Dating of anatase-forming diagenetic reactions in Rotliegend sandstones of the North German Basin

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DOI	10.1007/s00531-019-01705-x
	Dating of anatase-forming diagenetic reactions in Rotliegend sandstones of the North German Basin
	Sindern S.; Havenith V.; Gerdes A.; Meyer F.M.; Adelmann D.; Hellmann A.
发表日期	2019
ISSN	14373254
起始页码	1275
结束页码	1292
卷号	108 期号:4
英文摘要	Diagenetic conditions controlling authigenic formation of anatase and in situ LA-ICP-MS U–Pb isotope dating of this phase are studied in Upper Rotliegend II sandstones from two wells in NW-Germany. Anatase grew after breakdown of detrital Ti-phases (e.g. ilmenite) although local scale Ti transport and mobilization from detrital clay-hematite coats or condensed hydrocarbons cannot be ruled out. The anatase-forming reaction marks the change from a regime of reducing conditions imposed by first hydrocarbon generation to oxidizing conditions, probably caused by influx of a fluid from evaporitic Zechstein rocks. This change in fluid influx is interpreted as response to enhanced normal faulting and halokinesis during accelerated burial in Triassic times. Isotope data of U and Pb indicate incorporation of crustal common Pb from Mesozoic pore fluids but precisely mark diagenetic growth of anatase at 224.3 + 5.1/− 5.6 Ma in a Tera-Wasserburg plot. Locally, U–Pb isotope signatures are consistent with either additional incorporation of U and Pb from detrital precursor phases or with uptake of uranogenic Pb from hydrocarbons generated prior to 224 Ma. Anatase is shown to be a valuable authigenic phase suitable for U–Pb chronometry of diagenetic events, which appears to be unaffected by protracted burial and temperatures exceeding temperatures of crystallization. © 2019, Geologische Vereinigung e.V. (GV).
英文关键词	Anatase; Diagenesis; North-West German Basin; Rotliegend; Sandstone; U–Pb dating
语种	英语
scopus关键词	anatase; authigenesis; chemical reaction; crystallization; inductively coupled plasma method; sandstone; uranium-lead dating; North German Basin
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/147841
作者单位	Institute of Applied Mineralogy and Economic Geology, RWTH Aachen University, Wüllnerstr. 2, Aachen, 52062, Germany; ShinEtsu, SE Tylose GmbH & Co. KG, Rheingaustr. 190-196, Wiesbaden, 65203, Germany; Institut für Geowissenschaften, Goethe University Frankfurt, Altenhoeferallee 1, Frankfurt, 60438, Germany; Wintershall Holding GmbH, Friedrich-Ebert-Str. 160, Kassel, 34119, Germany
推荐引用方式 GB/T 7714	Sindern S.,Havenith V.,Gerdes A.,et al. Dating of anatase-forming diagenetic reactions in Rotliegend sandstones of the North German Basin[J],2019,108(4).
APA	Sindern S.,Havenith V.,Gerdes A.,Meyer F.M.,Adelmann D.,&Hellmann A..(2019).Dating of anatase-forming diagenetic reactions in Rotliegend sandstones of the North German Basin.International Journal of Earth Sciences,108(4).
MLA	Sindern S.,et al."Dating of anatase-forming diagenetic reactions in Rotliegend sandstones of the North German Basin".International Journal of Earth Sciences 108.4(2019).