DOI: 10.1306/10151312171
Scopus记录号: 2-s2.0-84907000545
论文题名: High-resolution sequence stratigraphy of the upper Ordovician Montoya Group, southern New Mexico and western Texas: Outcrop analog of an unconventional chert and carbonate reservoir
作者: Pope M.C.
刊名: AAPG Bulletin
ISSN: 0149-1548
EISSN: 1558-9278
出版年: 2014
发表日期: 2014
卷: 98, 期: 8 起始页码: 1577
结束页码: 1597
语种: 英语
Scopus关键词: Carbonation
; Deposition
; Regional planning
; Sandstone
; Sea level
; Carbonate ramps
; Carbonate reservoir
; Depositional sequences
; High resolution sequence stratigraphy
; Highstand systems tract
; Maximum flooding surfaces
; Regional development
; Relative sea level
; Stratigraphy
; chert
; depositional sequence
; dolomitization
; dolostone
; facies
; grainstone
; highstand
; Ordovician
; outcrop
; sandstone
; sequence stratigraphy
; Silurian
; subtidal environment
; transgression
; New Mexico
; Reeves County
; Texas
; United States
; Ward County [Texas]
; Anthozoa
Scopus学科分类: Energy
; Earth and Planetary Sciences
英文摘要: The Upper Ordovician Montoya Group crops out in southern New Mexico and westernmost Texas and records predominantly subtidal deposition on a gently dipping carbonate ramp that was subsequently almost entirely dolomitized. The Montoya Group is a third-order composite sequence composed of six regionally correlative, shallowing-upward, third-order depositional sequences (M0-M5). Sequence MO has sandstone at its base that is overlain by skeletal packstone-grainstone. Sequence MO occurs only locally and was likely deposited in a topographic low formed during regional development of the unconformity following El Paso Group deposition. Sequence Ml, marking the initial widespread transgression over the Ellenburger unconformity, consists of sandstone updip that passes downramp into skeletal packstone. The highstand systems tract (HST) of Ml consists of a prograding skeletal grainstone that was subaerially exposed upramp. Sequence M2, which contains the second-order maximum flooding surface, has abundant subtidal cherty carbonate at its base, which shallows upward into a widespread, prograding coral pack-stone-grainstone in the HST. Sequence M3 also contains abundant downramp chert that passes upramp into an aggrading crinoidal shoal and farther upramp into peritidal mudstone. Sequence M4 records an extensive basinward shift in facies as peritidal burrowed and cryptalgalaminated mudstone prograded over subtidal carbonate. Sequence M5 is only locally developed downramp and consists of crinoidal grainstone with abundant evidence of subaerial exposure. A regional unconformity separates the Montoya Group from the Silurian Fusselman Dolostone or younger units. Parasequences (meter-scale cycles) recording low- to moderateamplitude relative sea level fluctuations are ubiquituous features at individual outcrops but are difficult to correlate regionally. The abundance of syn- or early depositional chert in the subtidal facies indicates that the Montoya Group was deposited within a region of strong regional upwelling along southern Laurentia. This early formed chert was the reservoir facies in a successful Upper Ordovician gas play in Ward and Reeves Counties, Texas. Copyright ©2014. The American Association of Petroleum Geologists. All rights reserved. URL: https://www.scopus.com/inward/record.uri?eid=2-s2.0-84907000545&doi=10.1306%2f10151312171&partnerID=40&md5=65c9ee8c26569949ee62773b2c74bce9
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/13119
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:
Pope M.C.. High-resolution sequence stratigraphy of the upper Ordovician Montoya Group, southern New Mexico and western Texas: Outcrop analog of an unconventional chert and carbonate reservoir[J]. AAPG Bulletin,2014-01-01,98(8)