气候变化领域集成服务门户(CCPortal): Mixed siliciclastic-carbonate systems and their impact for the development of deep-water turbidites in continental margins: A case study from the late jurassic to early cretaceous shelburne subbasin in offshore Nova Scotia

CCPortal

DOI	10..1306/02151917318
	Mixed siliciclastic-carbonate systems and their impact for the development of deep-water turbidites in continental margins: A case study from the late jurassic to early cretaceous shelburne subbasin in offshore Nova Scotia
	Moscardelli L.; Ochoa J.; Lunt I.; Zahm L.
发表日期	2019
ISSN	0149-1423
卷号	103 期号:10
英文摘要	Progradation of deltaic systems that reach the shelf edge is considered a primary mechanism to deliver sand to continental margins. Sediment bypass processes can dominate the outer shelf to upper slope transition, causing poor preservation of reservoir quality sandstones. Turbidites can carry the bulk of the coarse fraction downdip where a thicker sand pile can be deposited once the channel-to-lobe transition is reached. Predicting this lateral and vertical variability along the slope is challenging. This configuration can be further complicated when mixed siliciclastic-carbonate systems are present. The Roseway-Missisauga case study from Nova Scotia is used here to explore potential implications associated with the development of deep-water turbidites that are time equivalent to outer-shelf mixed siliciclastic-carbonate units. Two scenarios are possible: (1) The carbonate factory is dominant, and the development of carbonate reefs and pinnacles on the outer shelf prevents the passage of siliciclastic systems beyond the shelf break; in this case, the siliciclastic component is sequestered within the inner-outer shelf. (2) Favorable conditions for carbonate production gradually deteriorate by the activation of fluviodeltaic systems that prograde outboard reaching the slope region. In this last scenario, low relief and lateral discontinuous carbonate shoals are ubiquitous in the outer shelf representing the last outboard remnants of the carbonate factory. Shelf-edge deltas circumvent or breach these carbonate shoals, establishing sedimentary pathways on the shelf-break region that connect with deep-water turbidites. Observations suggest that this last scenario is the most likely in this part of the Scotian margin during the Late Jurassic to Early Cretaceous. Copyright ©2019,.
语种	英语
scopus关键词	Offshore oil well production; Piles; Coarse fractions; Continental margin; Early Cretaceous; Favorable conditions; Fluvio-deltaic; Primary mechanism; Reservoir quality; Siliciclastic carbonates; Carbonation; carbonate rock; continental shelf; fluvial deposit; Jurassic; lithostratigraphy; preservation; progradation; reservoir rock; sandstone; shelf break; turbidite
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/125042
作者单位	Equinor Research and Technology, Austin, TX, United States; Equinor Exploration Regional Access, Calgary, AL, Canada; Equinor Drilling and Production International, Austin, TX, United States
推荐引用方式 GB/T 7714	Moscardelli L.,Ochoa J.,Lunt I.,et al. Mixed siliciclastic-carbonate systems and their impact for the development of deep-water turbidites in continental margins: A case study from the late jurassic to early cretaceous shelburne subbasin in offshore Nova Scotia[J],2019,103(10).
APA	Moscardelli L.,Ochoa J.,Lunt I.,&Zahm L..(2019).Mixed siliciclastic-carbonate systems and their impact for the development of deep-water turbidites in continental margins: A case study from the late jurassic to early cretaceous shelburne subbasin in offshore Nova Scotia.AAPG Bulletin,103(10).
MLA	Moscardelli L.,et al."Mixed siliciclastic-carbonate systems and their impact for the development of deep-water turbidites in continental margins: A case study from the late jurassic to early cretaceous shelburne subbasin in offshore Nova Scotia".AAPG Bulletin 103.10(2019).