Reconstructing the level of the central Red Sea evaporites at the end of the Miocene
Reconstructing the level of the central Red Sea evaporites at the end of the Miocene
复制标题
重建中新世末红海中部蒸发岩的水平
DOI:
10.1111/bre.12513
复制
发表时间:
2020
期刊:
影响因子:
3.2
通讯作者:
Mitchell N
中科院分区:
文献类型:
--
作者:
Mitchell N
Reconstructing the original depositional level of the Mesozoic and older c‘salt giants’ can reveal if their basins became filled to global sea level, but is complicated by dissolution, diapirism and because the time elapsed is so great. This is less of a problem in the Red Sea, a young rift basin that is transitioning to an ocean basin and where the evaporites away from coastal fringes are less affected by diapirism. In this study, we explore vertical movements of the evaporite surface of the central Red Sea imaged with deep seismic profiling, for the period of time after most evaporite deposition ended at 5.3 Ma (the Miocene‐Pliocene boundary). This boundary is readily mapped across the basin as a prominent reflection in seismic data correlated with stratigraphy at three DSDP sites. We quantify changes in the average elevation of the evaporite surface due to (a) thermal lithospheric subsidence, (b) isostatic loading by Plio‐Pleistocene sediments and water, (c) deflation needed to balance the volume of evaporites overflowing oceanic crust of 5.3 Ma age, (d) loss of halite by dissolution and (e) dynamic topography. Our best estimate of the evaporite level (−132 m air‐loaded or −192 m water‐loaded) lies below the range of estimated global sea level towards the end of the Miocene, suggesting that the basin remained under‐filled. If geological interpretations of shallow water conditions existing at the end of the Miocene (Zeit Formation) are correct, this implies that the water level of the Red Sea declined and was unstable. These calculations illustrate how spreading of evaporites can enhance thermal subsidence to cause rapid development of accommodation space above major evaporite bodies, which in the Red Sea case has remained largely unfilled.
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影响因子:
5.8
作者:
L. R. Tedeschi;H. Jenkyns;S. Robinson;A. Sanjinés;M. C. Viviers;C. Quintaes;J. C. Vazquez
通讯作者:
L. R. Tedeschi;H. Jenkyns;S. Robinson;A. Sanjinés;M. C. Viviers;C. Quintaes;J. C. Vazquez
DOI:
--
发表时间:
2015
期刊:
影响因子:
--
作者:
N. Rasul;I. F. Stewart
通讯作者:
I. F. Stewart
DOI:
--
发表时间:
1993
期刊:
影响因子:
--
作者:
M. Sultan;R. Becker;R. Arvidson;P. Shore;R. Stern;Z. Alfy;R. Attia
通讯作者:
R. Attia
DOI:
--
发表时间:
2011
期刊:
影响因子:
--
作者:
M. Ligi;E. Bonatti;F. Tontini;A. Cipriani;L. Cocchi;A. Schettino;G. Bortoluzzi;V. Ferrante;S. Khalil;N. Mitchell;N. Rasul
通讯作者:
N. Rasul
DOI:
--
发表时间:
1970
期刊:
Philosophical transactions of the Royal Society of London. Series A: Mathematical and physical sciences
影响因子:
--
作者:
D. Davies;C. Tramontini
通讯作者:
C. Tramontini