However, whether the sulfide remains stable in recycled altered oceanic crust (AOC) in the mantle is unclear, and the influence of AOC-derived metasomatic agents on the extraction efficiency of chalcophile elements from the deep mantle remains poorly understood. Here we report whole-rock Cu-Ag-Au...
1). These Fe–Mn oxide samples have a dull metallic luster and are not accompanied by substrate rocks or cores (Fig. 2). These features clearly distinguish them from the Fe–Mn oxides of hydrogenetic origin previously reported from petit-spot volcanoes17. Although the basaltic crust of the ...
Chemical, physical and biological processes within the mantle, crust, atmosphere and oceans fractionate sulphur isotopes, and material exchanges among these geological reservoirs lead to characteristic sulphur isotope signatures that have varied over time1. Sulphur isotope heterogeneity in the mantle, as sa...
The187Os/188Os composition of seawater (187Os/188Ossw) reflects the sources of osmium to the ocean: rivers that drain continents (187Os/188Oscont≈ 1.4) and aeolian dust (187Os/188Osaeol≈ 1.04) represent a radiogenic end-member, and alteration of juvenile ocean crust or from the mantle ...
(i) geodynamic con- ditions driving elemental cycling at ocean-crust-mantle interface, (ii) petrogenetic implications for the mantle and crustal sections of NHO, (iii) melt-rock interactions and mantle refertilisation processes, and (iv) transition and evolution of Tethyan oceanic lithosphere from ...
(Fig.1b). The ophiolite is subdivided into two superimposed ophiolite nappes that contain mantle peridotites, lower crust gabbroic rocks, subvolcanic mafic rocks, basalts, and cherts (Iturralde-Vinent1996). The mantle section of the ophiolitic sequence is made up of mostly harzburgites, and ...
Patten CGC, Pitcairn IK, Teagle DAH (2017) Hydrothermal mobi- lisation of Au and other metals in supra-subduction oceanic crust: Insights from the Troodos ophiolite. Ore Geol Rev 86:487-508Patten, C.G.C., Pitcairn, I.K. and Teagle, D.A.H. (2017). Hydrothermal mobilisation of Au ...