Relative sea level response to mixed carbonate-siliciclastic sediment loading along the Great Barrier Reef margin
نویسندگان
چکیده
The continental shelf along northeastern Australia is the world's largest mixed carbonate-siliciclastic passive margin and location of Great Barrier Reef (GBR). Following sea-level transgression during last deglaciation, extensive sediment was deposited GBR due to neritic carbonate deposition (including edge reefs, Holocene reefs Halimeda bioherms) fluvial discharge terrigenous siliciclastic sediments. Such loading can alter local relative sea level (RSL) by several metres through isostatic adjustment (SIA) process, a signal that poorly constrained at GBR. In this study, we used glacial (GIA) model develop an ensemble-based history for since Marine Isotope Stage 2 (MIS 2). A Bayesian style framework adopted calibrate ensemble GIA parameters using database. According our results, 1853.7 Gt (1613.1-2078.7 Gt, 95% confidence interval) have been across MIS (28 ka BP), causing spatially variable change with highest magnitude (0.9-1.1 m) found in outer southern central (18.4-21.6∘ S). Because SIA-induced RSL rise unrelated ice mass loss, failing correct will lead systematic overestimation grounded volume up ∼4.3 × 105 km3 Last Glacial Maximum. Additionally, spatial variation coastal environment may explain different documented published fossil coral reef records from Noggin Pass Hydrographer's Passage. These results highlight importance considering SIA any postglacial studies adjacent large systems. Lastly, quantifying both signals, provide temporally complete reconstruction well-suited be as boundary condition study evolution slope sedimentary system.
منابع مشابه
Pii: S0037-0738(00)00027-0
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ژورنال
عنوان ژورنال: Earth and Planetary Science Letters
سال: 2023
ISSN: ['1385-013X', '0012-821X']
DOI: https://doi.org/10.1016/j.epsl.2023.118066