Siderophile-enriched sediments from the Cretaceous–Tertiary boundary
Siderophilic element concentrations are high in sediments from the Cretaceous–Tertiary
boundary. An extraterrestrial source is indicated. Concentrations are too high to be …
boundary. An extraterrestrial source is indicated. Concentrations are too high to be …
An extraterrestrial event at the Cretaceous–Tertiary boundary
J Smit, J Hertogen - Nature, 1980 - nature.com
Closely spaced samples from an uninterrupted calcareous pelagic sequence across the
Cretaceous–Tertiary boundary reveal that the extinction of planktonic Foraminifera and …
Cretaceous–Tertiary boundary reveal that the extinction of planktonic Foraminifera and …
Sanidine spherules at the Cretaceous–Tertiary boundary indicate a large impact event
J Smit, G Klaver - Nature, 1981 - nature.com
The hypothesis that a catastrophic impact of an extraterrestrial body caused the terminal
Cretaceous mass extinctions of dinosaurs, planktonic foraminfera and other species is now …
Cretaceous mass extinctions of dinosaurs, planktonic foraminfera and other species is now …
High noble metal concentrations in a late Pliocene sediment
Abstract A 2.3-Myr-old layer in a sediment from the Antarctic Ocean contains Ir and Au at
levels comparable with those at the Cretaceous–Tertiary boundary. A sizable fraction of the …
levels comparable with those at the Cretaceous–Tertiary boundary. A sizable fraction of the …
Siderophile-rich magnetic spheroids from the Cretaceous–Tertiary boundary in Umbria, Italy
The magnetic fraction of some Cretaceous–Tertiary (K–T) boundary sediments sampled at
two locations in Italy, contains a spheroidal component which has retained some relict …
two locations in Italy, contains a spheroidal component which has retained some relict …
Source of Precambrian chemical and clastic sediments
RG Miller, RK O'nions - Nature, 1985 - nature.com
The Nd isotope composition of chemical and clastic sediments surviving from the Archaean
provides no evidence for the existence of pre-4,000-Myr continental crust. Either the …
provides no evidence for the existence of pre-4,000-Myr continental crust. Either the …
Preservation of organic matter in sediments promoted by iron
The biogeochemical cycles of iron and organic carbon are strongly interlinked. In oceanic
waters, organic ligands have been shown to control the concentration of dissolved iron. In …
waters, organic ligands have been shown to control the concentration of dissolved iron. In …
Non-chondritic distribution of the highly siderophile elements in mantle sulphides
The abundances of highly siderophile (iron-loving) elements (HSEs) in the Earth's mantle
provide important constraints on models of the Earth's early evolution. It has long been …
provide important constraints on models of the Earth's early evolution. It has long been …
Metal remobilization at a spreading centre studied using lead isotopes
B Dupré, G Blanc, J Boulègue, CJ Allègre - Nature, 1988 - nature.com
The metalliferous sediment deposits of the Atlantis II Deep in the Red Sea are an example of
submarine hydrothermal deposits at a spreading centre. The brine salinities (∼ 270% for the …
submarine hydrothermal deposits at a spreading centre. The brine salinities (∼ 270% for the …
Post-depositional mobility of platinum, iridium and rhenium in marine sediments
DC Colodner, EA Boyle, JM Edmond, J Thomson - Nature, 1992 - nature.com
THE discovery of high concentrations of iridium in Cretaceous/Tertiary boundary sediments
engendered the hypothesis1 that a meteorite collided with the Earth 65 million years ago …
engendered the hypothesis1 that a meteorite collided with the Earth 65 million years ago …