气候变化领域集成服务门户(CCPortal): Onshore-offshore correlations of cretaceous fluvial-deltaic sequences; southern Baltimore Canyon trough

CCPortal

DOI	10.1306/05061918197
	Onshore-offshore correlations of cretaceous fluvial-deltaic sequences; southern Baltimore Canyon trough
	Schmelz W.J.; Miller K.G.; Mountain G.S.; Browning J.V.; Baldwin K.E.
发表日期	2020
ISSN	0149-1423
起始页码	411
结束页码	448
卷号	104 期号:2
英文摘要	We evaluate Cretaceous depositional sequences on approximately 4400 km (~2700 mi) of newly released multichannel seismic profiles and five wells on the continental shelf in the southern Baltimore Canyon trough and tie the data to three wells drilled onshore in the Maryland coastal plain. Seismic geometries coupled with facies and biostratigraphy from the wells are used to delineate mid-Cretaceous (Aptian-Turonian) depositional sequences and paleogeography. Beneath these sequences, 400-1000 m (1300-3300 ft) of Lower Cretaceous sedimentary rocks underlie the modern shelf. They thicken along strike to the southwest, implying a southern sediment source. Aptian to Cenomanian sediments were deposited in shelf to nearshore settings. A landward movement of the depocenter and a shift toward facies indicative of deeper paleodepths marks a 107-yr mid-Cretaceous transgression, within which we identify five sequences. A composite maximum flooding surface (MFS) within the uppermost of these retrogradational units is associated with the Cenomanian-Turonian boundary and ocean anoxic event 2. Shingled, lower Turonian seismic reflections prograde across the outer shelf, downlapping onto the composite MFS, and are truncated by a mid-Turonian sequence boundary. The Upper Cretaceous section thickens seaward and along strike to the northeast, implying a northern source and little Late Cretaceous accommodation beneath the modern shelf. Mid-Cretaceous strata offshore Maryland are likely sand-prone, considering their proximity to the correlative fluvial facies of the onshore Potomac Group. These potential reservoir sands are capped by regional confining units generated by 107-yr global mean sea-level flooding events and are excellent targets for supercritical carbon storage. © 2020 American Association of Petroleum Geologists. All rights reserved.
语种	英语
scopus关键词	Digital storage; Floods; Offshore oil well production; Reservoirs (water); Sea level; Sedimentary rocks; Seismic waves; Seismology; Continental shelves; Depositional sequences; Global mean sea levels; Maximum flooding surfaces; Multi-channel seismic; Ocean anoxic event 2; Onshore-offshore correlation; Supercritical carbon; Deposition; carbon storage; Cretaceous; deltaic deposit; fluvial deposit; fluvial morphological feature; sequence stratigraphy; supercritical flow; transgression; Turonian; Atlantic Ocean; Baltimore Canyon
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/143721
作者单位	Department of Earth and Planetary Sciences, Rutgers University, Piscataway, NJ, United States; Institute of Earth, Ocean, and Atmospheric Sciences, Rutgers University, Piscataway, NJ, United States
推荐引用方式 GB/T 7714	Schmelz W.J.,Miller K.G.,Mountain G.S.,et al. Onshore-offshore correlations of cretaceous fluvial-deltaic sequences; southern Baltimore Canyon trough[J],2020,104(2).
APA	Schmelz W.J.,Miller K.G.,Mountain G.S.,Browning J.V.,&Baldwin K.E..(2020).Onshore-offshore correlations of cretaceous fluvial-deltaic sequences; southern Baltimore Canyon trough.AAPG Bulletin,104(2).
MLA	Schmelz W.J.,et al."Onshore-offshore correlations of cretaceous fluvial-deltaic sequences; southern Baltimore Canyon trough".AAPG Bulletin 104.2(2020).