DOI: 10.1306/08191414024
Scopus记录号: 2-s2.0-84919341272
论文题名: Characterization and development of subsurface fractures observed in the Marcellus Formation, Appalachian Plateau, north-central Pennsylvania
作者: Wilkins S. ; Mount V. ; Mahon K. ; Perry A. ; Koenig J.
刊名: AAPG Bulletin
ISSN: 0149-1587
EISSN: 1558-9317
出版年: 2014
发表日期: 2014
卷: 98, 期: 11 起始页码: 2301
结束页码: 2346
语种: 英语
Scopus关键词: Stratigraphy
; Associated sets
; Central Pennsylvania
; Direction change
; Homogenization temperatures
; Horizontal stress
; Sub-surface fractures
; Subsurface deformation
; Valley and Ridge
; Deformation
; Alleghanian orogeny
; bedding plane
; deformation mechanism
; fluid inclusion
; fold belt
; fracture
; homogeneity
; outcrop
; reverse fault
; stylolite
; Appalachians
; Pennsylvania
; United States
Scopus学科分类: Energy
; Earth and Planetary Sciences
英文摘要: We report on subsurface deformation features measured from recently acquired core and image logs from the Marcellus Formation in north-central Pennsylvania, supplemented with data collected from Valley and Ridge outcrop. The subsurface data are from an area that bridges a gap in existing published data between outcrop in the Valley and Ridge province of Pennsylvania and the relatively undeformed outcrop exposed on the Appalachian Plateau of New York. We find one distinct set of vertical veins that strike orthogonal to Appalachian Plateau fold axes and an associated set of low-angle reverse faults and stylolites that strike parallel to fold axes. As the trend of the fold axes changes around the Pennsylvania salient, the trend of associated mesostructures changes to maintain kinematic compatibility with the shortening direction change along the salient. These structures are interpreted to support a single, although possibly protracted, strain event during Alleghanian deformation, as opposed to multiple events previously interpreted to occur in different regions and stratigraphic levels within the fold belt. The veins are associated with clusters of bedding-plane slip surfaces, which are found at distinct mechanical stratigraphic positions where the competence contrast between shale and stiff limestone units is greatest. We interpret this association to indicate that bed parallel-shear within detachment zones provides the sufficient driving force required to nucleate vertical veins, and the decoupling of beds accommodates extension orthogonal to the shortening direction. Although these veins are oriented orthogonal to the present-day maximum principal horizontal stress, they remain propped open by crystalline cements. Homogenization temperatures of fluid inclusions trapped in the veins, combined with one-dimensional burial and thermal history models, suggest that the pervasive vein set formed during the Late Pennsylvanian-Permian during the Alleghanian orogeny. Copyright © 2014. The American Association of Petroleum Geologists. All rights reserved. URL: https://www.scopus.com/inward/record.uri?eid=2-s2.0-84919341272&doi=10.1306%2f08191414024&partnerID=40&md5=85e5f73ece10774a72ff476da4973707
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/13158
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:
Wilkins S.,Mount V.,Mahon K.,et al. Characterization and development of subsurface fractures observed in the Marcellus Formation, Appalachian Plateau, north-central Pennsylvania[J]. AAPG Bulletin,2014-01-01,98(11)