DOI: 10.1306/10081413162
Scopus记录号: 2-s2.0-84923539943
论文题名: Structural and chemical controls of deformation bands on fluid flow: Interplay between cataclasis and diagenetic alteration
作者: Lommatzsch M. ; Exner U. ; Gier S. ; Grasemann B.
刊名: AAPG Bulletin
ISSN: 0149-1476
EISSN: 1558-9206
出版年: 2015
发表日期: 2015
卷: 99, 期: 4 起始页码: 689
结束页码: 710
语种: 英语
Scopus关键词: Deformation
; Grain growth
; Mica
; Porosity
; Quartz
; Sediments
; Silicate minerals
; Silicates
; Structural geology
; Chemical alteration
; Diagenetic alteration
; Dominant deformation mechanism
; Initial composition
; Kinematic condition
; Localized deformations
; Macroscopic and microscopic
; Mechanical deformation
; Flow of fluids
; albite
; authigenic mineral
; biotite
; cataclasite
; chemical alteration
; deformation mechanism
; feldspar
; fluid flow
; grain size
; outcrop
; porosity
; quartz
; reservoir characterization
; shear band
; structural control
; Austria
Scopus学科分类: Energy
; Earth and Planetary Sciences
英文摘要: We examined cataclastic shear bands (CSB) with, varying degrees of deformation and alteration that formed in uncemented, arkosic sediments under identical kinematic conditions. The investigated outcrop in eastern Austria exposes numerous closely spaced sets of CSB formed at low burial depth. The uncemented host sediment consists of detrital quartz, albite, micas, and metamorphic lithoclasts. We distinguished three types of CSB, which differ in macroscopic and microscopic properties as well as in influence on fluid flow (i.e., single bands, multistrand bands, and band clusters). All band types show preferred fracturing of sericited albite grains and decomposition of biotite through mechanical deformation and subsequent chemical alteration. These mechanisms reduce the mean grain size, increase the amount of phyllosilicates in the matrix, and facilitate later growth of authigenic clay minerals. The dominant deformation mechanisms and influence on fluid flow are controlled by the initial composition and intensity of diagenetic alteration. We identified different evolutionary stages from a high-porosity host rock (porosity [Φ] = 35%) to a deformation band cluster (Φ = 6%) that acts as fluid baffle. The measured reduction in porosity of up to 29% is reflected by retention of fluids along band clusters, along multistrand bands, and between intersecting bands. The timing and direction of the specific fluid flows can be determined by the interaction with the deformation bands. These findings suggest that localized deformation and associated diagenetic alteration in feldsparbearing sediments may promote reservoir compartmentalization. Copyright © 2015. The American Association of Petroleum Geologists. All rights reserved. URL: https://www.scopus.com/inward/record.uri?eid=2-s2.0-84923539943&doi=10.1306%2f10081413162&partnerID=40&md5=8c4d6e7ac1cf17b7a68edf7ed4a4ccc1
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/13047
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:
Lommatzsch M.,Exner U.,Gier S.,et al. Structural and chemical controls of deformation bands on fluid flow: Interplay between cataclasis and diagenetic alteration[J]. AAPG Bulletin,2015-01-01,99(4)