气候变化领域集成服务门户(CCPortal): Burial Diagenesis and Tectonism Inferred From Paleomagnetism and Magnetic Fabrics in the Wolfcamp Shale, Midland Basin, Texas, USA

CCPortal

DOI	10.1029/2019JB019046
	Burial Diagenesis and Tectonism Inferred From Paleomagnetism and Magnetic Fabrics in the Wolfcamp Shale, Midland Basin, Texas, USA
	Heij G.W.; Elmore R.D.
发表日期	2020
ISSN	21699313
卷号	125 期号:5
英文摘要	An integrated rock magnetic, paleomagnetic, geochemical, and electron microscopy study was performed on three cores penetrating the Wolfcamp Shale interval in the Midland Basin, West Texas. This work presents a temporally constrained diagenetic history of the Wolfcamp Shale, refines our understanding of tectonic influences in the Midland Basin, and postulates an interplay of late diagenetic processes that may contribute to the formation of authigenic magnetite on the surfaces of chlorite/illite. Paleomagnetic results indicate a well constrained, lithofacies independent, Jurassic-aged chemical remanent magnetization carried by SD-PSD magnetite. 1D basin modeling suggests that the Jurassic chemical remanent magnetization occurred within the oil window (100–120 °C) during a tectonically quiescent phase. Burial temperatures, electron microscopy, and inorganic geochemistry provide lines of evidence for maturation/migration of hydrocarbons, dissolution of carbonates, and chloritization/illitization. We interpret that the interaction of these processes may have created conditions suitable for the neoformation of magnetite on the surfaces of chlorite/illite. Anisotropy of magnetic susceptibility (AMS) fabrics are carried by paramagnetic clays, and ferroan dolomite is observed in all cores. Geographically corrected data show NE-SW lineations among normal AMS fabrics and streaked inverse AMS fabrics trending NW-SE. Textural observations indicate that authigenic ferroan dolomite formed in undercompacted conditions and likely behaved as passive structural markers. The orientation of AMS fabrics and the relative timing of ferroan dolomite authigenesis suggest that layer-parallel shorting occurred shortly after the deposition of the Wolfcamp Shale and likely corresponds with the timing of Marathon-Ouachita suturing. ©2020. American Geophysical Union. All Rights Reserved.
英文关键词	anisotropy of magnetic susceptibility (AMS); chemical Remanent magnetizations; Midland Basin; paleomagnetism; Wolfcamp
语种	英语
来源期刊	Journal of Geophysical Research: Solid Earth
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/187873
作者单位	School of Geology and Geophysics, The University of Oklahoma, Norman, OK, United States
推荐引用方式 GB/T 7714	Heij G.W.,Elmore R.D.. Burial Diagenesis and Tectonism Inferred From Paleomagnetism and Magnetic Fabrics in the Wolfcamp Shale, Midland Basin, Texas, USA[J],2020,125(5).
APA	Heij G.W.,&Elmore R.D..(2020).Burial Diagenesis and Tectonism Inferred From Paleomagnetism and Magnetic Fabrics in the Wolfcamp Shale, Midland Basin, Texas, USA.Journal of Geophysical Research: Solid Earth,125(5).
MLA	Heij G.W.,et al."Burial Diagenesis and Tectonism Inferred From Paleomagnetism and Magnetic Fabrics in the Wolfcamp Shale, Midland Basin, Texas, USA".Journal of Geophysical Research: Solid Earth 125.5(2020).