干旱区生态环境知识资源中心(Arid): Submarine Salt Karst Terrains

Arid

DOI	10.3934/geosci.2016.2.182
	Submarine Salt Karst Terrains
	Talbot, Christopher; Augustin, Nico
通讯作者	Talbot, C
来源期刊	AIMS GEOSCIENCES
ISSN	2471-2132
出版年	2016
卷号	2 期号:2 页码:182-200
英文摘要	Karst terrains that develop in bodies of rock salt (taken as mainly of halite, NaCl) are special not only for developing in one of the most soluble of all rocks, but also for developing in one of the weakest rocks. Salt is so weak that many surface-piercing salt diapirs extrude slow fountains of salt that that gravity spread downslope over deserts on land and over sea floors. Salt fountains in the deserts of Iran are usually so dry that they flow at only a few cm/yr but the few rain storms a decade so soak and weaken them that they surge at dm/day for a few days. We illustrate the only case where the rates at which different parts of one of the many tens of subaerial salt karst terrains in Iran flows downslope constrains the rates at which its subaerial salt karst terrains form. Normal seawater is only 10% saturated in NaCl. It should therefore be sufficiently aggressive to erode karst terrains into exposures of salt on the thousands of known submarine salt extrusions that have flowed or are still flowing over the floors of hundreds of submarine basins worldwide. However, we know of no attempt to constrain the processes that form submarine salt karst terrains on any of these of submarine salt extrusions. As on land, many potential submarine karst terrains are cloaked by clastic and pelagic sediments that are often hundreds of m thick. Nevertheless, detailed geophysical and bathymetric surveys have already mapped likely submarine salt karst terrains in at least the Gulf of Mexico, and the Red Sea. New images of these two areas are offered as clear evidence of submarine salt dissolution due to sinking or rising aggressive fluids. We suggest that repeated 3D surveys of distinctive features (+/- fixed seismic reflectors) of such terrains could measure any downslope salt flow and thus offer an exceptional opportunity to constrain the rates at which submarine salt karst terrains develop. Such rates are of interest to all salt tectonicians and the many earth scientists seeking hydrocarbons associated with salt bodies.
英文关键词	salt karst terrains submarine Gulf of Mexico Red Sea
类型	Article
语种	英语
开放获取类型	DOAJ Gold, Green Accepted, Green Published
收录类别	ESCI
WOS记录号	WOS:000404164600005
WOS关键词	ORCA BASIN ; GULF ; EXTRUSION
WOS类目	Geosciences, Multidisciplinary
WOS研究方向	Geology
Scopus学科分类	14 Dinglederry, Olney MK46 5ES, England.
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/331836
作者单位	[Talbot, Christopher] Uppsala Univ, Hans Ramberg Tecton Lab, S-75236 Uppsala, Sweden; [Talbot, Christopher] 14 Dinglederry, Olney MK46 5ES, England; [Augustin, Nico] GEOMAR Helmholtz Ctr Ocean Res Kiel, Kiel, Germany
推荐引用方式 GB/T 7714	Talbot, Christopher,Augustin, Nico. Submarine Salt Karst Terrains[J],2016,2(2):182-200.
APA	Talbot, Christopher,&Augustin, Nico.(2016).Submarine Salt Karst Terrains.AIMS GEOSCIENCES,2(2),182-200.
MLA	Talbot, Christopher,et al."Submarine Salt Karst Terrains".AIMS GEOSCIENCES 2.2(2016):182-200.