Matches in SemOpenAlex for { <https://semopenalex.org/work/W2800567443> ?p ?o ?g. }
- W2800567443 endingPage "1712" @default.
- W2800567443 startingPage "1690" @default.
- W2800567443 abstract "West African drainage reorganization during Cretaceous opening of the Atlantic Ocean is deciphered here from geochemical provenance studies of Central Atlantic sediments. Changes in the geochemical signature of marine sediments are reflected in major and trace element concentrations and strontium-neodymium radiogenic isotopic compositions of Cretaceous sedimentary rocks from eight Deep Sea Drilling Project (DSDP) sites and one exploration well. Homogeneous major and trace element compositions over time indicate sources with average upper (continental) crust signatures. However, detailed information on the ages of these sources is revealed by neodymium isotopes (expressed as ɛNd). The ɛNd(0) values from the DSDP sites show a three-step decrease during the Late Cretaceous: (1) the Albian-Middle Cenomanian ɛNd(0) values are heterogeneous (–5.5 to −14.9) reflecting the existence of at least three subdrainage basins with distinct sedimentary sources (Hercynian/Paleozoic, Precambrian, and mixed Precambrian/Paleozoic); (2) during the Late Cenomanian-Turonian interval, ɛNd(0) values become homogeneous in the deepwater basin (–10.3 to −12.4), showing a negative shift of 2 epsilon units interpreted as an increasing contribution of Precambrian inputs; (3) this negative shift continues in the Campanian-Maastrichtian (ɛNd(0) = −15), indicating that Precambrian sources became dominant. These provenance changes are hypothesized to be related to the opening of the South and Equatorial Atlantic Ocean, coincident with tectonic uplift of the continental margin triggered by Africa-Europe convergence. Finally, the difference between ɛNd(0)values of Cretaceous sediments from the Senegal continental shelf and from the deepwater basins suggests that ocean currents prevented detrital material from the Mauritanides reaching deepwater areas." @default.
- W2800567443 created "2018-05-17" @default.
- W2800567443 creator A5016108712 @default.
- W2800567443 creator A5019698001 @default.
- W2800567443 creator A5020282158 @default.
- W2800567443 creator A5032246165 @default.
- W2800567443 creator A5041236719 @default.
- W2800567443 creator A5048535429 @default.
- W2800567443 creator A5051201406 @default.
- W2800567443 creator A5070704540 @default.
- W2800567443 date "2018-05-01" @default.
- W2800567443 modified "2023-10-18" @default.
- W2800567443 title "Geochemical Evidence for Large‐Scale Drainage Reorganization in Northwest Africa During the Cretaceous" @default.
- W2800567443 cites W1018411278 @default.
- W2800567443 cites W1124713089 @default.
- W2800567443 cites W1174458397 @default.
- W2800567443 cites W119777211 @default.
- W2800567443 cites W1473370317 @default.
- W2800567443 cites W1496125813 @default.
- W2800567443 cites W1577861980 @default.
- W2800567443 cites W1659967697 @default.
- W2800567443 cites W1839442997 @default.
- W2800567443 cites W1969414340 @default.
- W2800567443 cites W1970797628 @default.
- W2800567443 cites W1971359992 @default.
- W2800567443 cites W1972247628 @default.
- W2800567443 cites W1975042776 @default.
- W2800567443 cites W1975574672 @default.
- W2800567443 cites W1979982652 @default.
- W2800567443 cites W1980364678 @default.
- W2800567443 cites W1980642926 @default.
- W2800567443 cites W1980966991 @default.
- W2800567443 cites W1982576562 @default.
- W2800567443 cites W1983303965 @default.
- W2800567443 cites W1988540193 @default.
- W2800567443 cites W1989087350 @default.
- W2800567443 cites W1989194022 @default.
- W2800567443 cites W1990713790 @default.
- W2800567443 cites W1991149806 @default.
- W2800567443 cites W1994549679 @default.
- W2800567443 cites W1996055672 @default.
- W2800567443 cites W2001037571 @default.
- W2800567443 cites W2001312000 @default.
- W2800567443 cites W2006032174 @default.
- W2800567443 cites W2007612719 @default.
- W2800567443 cites W2007800468 @default.
- W2800567443 cites W2010709374 @default.
- W2800567443 cites W2010809426 @default.
- W2800567443 cites W2011448633 @default.
- W2800567443 cites W2013423238 @default.
- W2800567443 cites W2014997025 @default.
- W2800567443 cites W2015352647 @default.
- W2800567443 cites W2015673067 @default.
- W2800567443 cites W2016223358 @default.
- W2800567443 cites W2017395325 @default.
- W2800567443 cites W2018021159 @default.
- W2800567443 cites W2018539923 @default.
- W2800567443 cites W2019035841 @default.
- W2800567443 cites W2022561496 @default.
- W2800567443 cites W2023477252 @default.
- W2800567443 cites W2023820507 @default.
- W2800567443 cites W2024902876 @default.
- W2800567443 cites W2026425563 @default.
- W2800567443 cites W2029014434 @default.
- W2800567443 cites W2029401070 @default.
- W2800567443 cites W2030643444 @default.
- W2800567443 cites W2033584953 @default.
- W2800567443 cites W2035061083 @default.
- W2800567443 cites W2037080634 @default.
- W2800567443 cites W2037146927 @default.
- W2800567443 cites W2044134956 @default.
- W2800567443 cites W2053777680 @default.
- W2800567443 cites W2054153880 @default.
- W2800567443 cites W2056037346 @default.
- W2800567443 cites W2060019940 @default.
- W2800567443 cites W2061914851 @default.
- W2800567443 cites W2063781521 @default.
- W2800567443 cites W2071179138 @default.
- W2800567443 cites W2071864469 @default.
- W2800567443 cites W2072229475 @default.
- W2800567443 cites W2074935405 @default.
- W2800567443 cites W2076566162 @default.
- W2800567443 cites W2076797628 @default.
- W2800567443 cites W2077409733 @default.
- W2800567443 cites W2078140135 @default.
- W2800567443 cites W2079746234 @default.
- W2800567443 cites W2080973065 @default.
- W2800567443 cites W2081357546 @default.
- W2800567443 cites W2081656012 @default.
- W2800567443 cites W2081936979 @default.
- W2800567443 cites W2086159836 @default.
- W2800567443 cites W2087650411 @default.
- W2800567443 cites W2088884103 @default.
- W2800567443 cites W2090455350 @default.
- W2800567443 cites W2093980733 @default.
- W2800567443 cites W2094995088 @default.
- W2800567443 cites W2098442602 @default.
- W2800567443 cites W2105640894 @default.