3D characterisation and quantification of an offshore freshened groundwater system in the Canterbury Bight
3D characterisation and quantification of an offshore freshened groundwater system in the Canterbury Bight
复制标题
坎特伯雷湾离岸淡水地下水系统的 3D 表征和量化
DOI:
10.1038/s41467-020-14770-7
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发表时间:
2020
影响因子:
16.6
通讯作者:
Tiwari
中科院分区:
文献类型:
--
作者:
Micallef;Person;Haroon;Weymer;Schwalenberg;Faghih;Mountjoy;Averes;Tiwari
Although offshore freshened groundwater (OFG) systems have been documented in numerous continental margins worldwide, their geometry, controls and emplacement dynamics remain poorly constrained. Here we integrate controlled-source electromagnetic, seismic reflection and borehole data with hydrological modelling to quantitatively characterise a previously unknown OFG system near Canterbury, New Zealand. The OFG system consists of one main, and two smaller, low salinity groundwater bodies. The main body extends up to 60 km from the coast and a seawater depth of 110 m. We attribute along-shelf variability in salinity to permeability heterogeneity due to permeable conduits and normal faults, and to recharge from rivers during sea level lowstands. A meteoric origin of the OFG and active groundwater migration from onshore are inferred. However, modelling results suggest that the majority of the OFG was emplaced via topographically-driven flow during sea level lowstands in the last 300 ka. Global volumetric estimates of OFG will be significantly revised if active margins, with steep coastal topographies like the Canterbury margin, are considered.
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影响因子:
3.5
作者:
M. Person;John L. Wilson;N. Morrow;V. Post
通讯作者:
M. Person;John L. Wilson;N. Morrow;V. Post
影响因子:
5.2
作者:
H. Michael;K. Scott;Mohammad Koneshloo;Xuan Yu;M. R. Khan;Katie Li
通讯作者:
H. Michael;K. Scott;Mohammad Koneshloo;Xuan Yu;M. R. Khan;Katie Li
DOI:
--
发表时间:
1996
期刊:
影响因子:
--
作者:
A. Bal
通讯作者:
A. Bal
DOI:
--
发表时间:
2002
期刊:
影响因子:
--
作者:
P. White;R. Reeves
通讯作者:
R. Reeves
DOI:
--
发表时间:
1974
期刊:
影响因子:
--
作者:
S. Mandel
通讯作者:
S. Mandel