气候变化领域集成服务门户(CCPortal): Potassium-argon timing of episodic mica and illite crystallization in highly indurated Hassi Messaoud (Algeria) hydrocarbonbearing sandstones

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DOI	10.1306/06071816525
	Potassium-argon timing of episodic mica and illite crystallization in highly indurated Hassi Messaoud (Algeria) hydrocarbonbearing sandstones
	Clauer N.; Zwingmann H.; Todd A.; Aubert A.
发表日期	2019
ISSN	0149-1423
卷号	103 期号:1
英文摘要	Nanometer to micrometer mica and illite separates of indurated Cambrian and Ordovician oil-bearing sandstones from the Hassi Messaoud field (Algeria) were extracted, x-rayed, observed by scanning and transmission electron microscopy, and K-Ar dated. Electron microscope observations revealed typical euhedral shapes for the mica to illite particles of most size fractions; almost no odd-shaped detrital crystals were detected. The combined results document several generations of mineralogical and morphological identical mica to illite crystals that could not be differentiated by the traditional identification methods. Illite and mica genesis was multiphased with crystallization episodes at 340 ±10 (ca. Middle Mississippian), 280 ±10 Ma (ca. early Permian), and 170±10 Ma (ca. Middle Jurassic). Younger than the stratigraphic age of the host rocks, which is incompatible with a detrital origin, the two older mica ages confirm that the hydrocarbon generation and emplacement had to start after the Variscan tectonothermal event and before exhumation of the meta-sediments. The younger K-Ar ages at 135 to 110 Ma (ca. Early Cretaceous) relate to further crystallization episodes, whereas those at circa 295, 265, and 210Ma probably correspond to variable mixtures of the older and younger mica to illite endmembers. Three average K-Ar values are statistically significant: The oldest at 340 ±10 Ma corresponds to the start of the Variscan tectonic activity, and the intermediate at 280±10 Ma sets its end, both episodes probably modifying the reservoir capacities of the potential hydrocarbon host rocks. The ages at 170±10 Ma identify a further diagenetic activity characterized by illitization of dickitetype precursors in local reservoirs. These younger ages could correspond to the hydrocarbon charge into reservoirs, which stopped diagenetic illitization at a present-day depth of approximately 4000 m (∼13,000 ft). © 2019. The American Association of Petroleum Geologists.
语种	英语
scopus关键词	Argon; High resolution transmission electron microscopy; Hydrocarbons; Mica; Oil bearing formations; Potassium; Sandstone; Scanning electron microscopy; Silicate minerals; Stratigraphy; Timing circuits; Hassi-messaoud fields; Hydrocarbon generation; Identification method; Reservoir capacity; Scanning and transmission electron microscopy; Stratigraphic age; Tectonic activity; Tectono-thermal event; Potassium compounds; argon; Cambrian; crystallization; detection method; emplacement; Hercynian orogeny; host rock; hydrocarbon generation; hydrocarbon reservoir; illite; mica; Mississippian; Ordovician; potassium; sandstone; Algeria; Hassi Messaoud Oil Field; Ouargla
来源期刊	AAPG Bulletin
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/125085
作者单位	Institut de Physique du Globe de Strasbourg, Universite de Strasbourg, Universite de Strasbourg-Centre National de la Recherche Scientifique (Uds-CNRS), Strasbourg, France; Division of Earth and Planetary Sciences, Graduate School of Science, Kyoto University, Sakyo-ku, Kyoto, Japan; Commonwealth Scientific and Industrial Research Organization Earth Science and Resource Engineering, Bentley, WA, Australia; Laboratoire d'Hydrologie et de Geochimie de Strasbourg, Universite de Strasbourg, UdS-CNRS, Strasbourg, France
推荐引用方式 GB/T 7714	Clauer N.,Zwingmann H.,Todd A.,et al. Potassium-argon timing of episodic mica and illite crystallization in highly indurated Hassi Messaoud (Algeria) hydrocarbonbearing sandstones[J],2019,103(1).
APA	Clauer N.,Zwingmann H.,Todd A.,&Aubert A..(2019).Potassium-argon timing of episodic mica and illite crystallization in highly indurated Hassi Messaoud (Algeria) hydrocarbonbearing sandstones.AAPG Bulletin,103(1).
MLA	Clauer N.,et al."Potassium-argon timing of episodic mica and illite crystallization in highly indurated Hassi Messaoud (Algeria) hydrocarbonbearing sandstones".AAPG Bulletin 103.1(2019).