Dongsheng Ma
Nanjing University
Publications 3
#1Bernd LehmannH-Index: 34
#2Thomas F. Nägler (University of Bern)H-Index: 47
Last.Peter DulskiH-Index: 11
view all 8 authors...
We report evidence for the seawater origin of an extremely metal-enriched sulfide- and organic carbon–rich marker bed in a transgressive Early Cambrian black shale sequence along the passive margin of the Yangtze platform. The element concentration pattern in this marker bed suggests that it formed in a sediment-starved, stratified basin with a euxinic water column below an oxic surface layer. Biological activity was high in the surface layer, which was resupplied by communication with oxic ocea...
141 CitationsSource
#1Jia-Yong PanH-Index: 1
#2Dongsheng MaH-Index: 2
Last.WUKaiH-Index: 3
view all 7 authors...
#1Jingwen MaoH-Index: 35
#2Bernd LehmannH-Index: 34
Last.Robert Kerrich (U of S: University of Saskatchewan)H-Index: 55
view all 8 authors...
Black shales of the basal Lower Cambrian Niutitang Formation, southeast China, host a regionally distributed concordant, several centimeter-thick, sulfide layer which displays extreme metal enrichment, i.e., Mo-NiSe-Re-Os-As-Hg-Sb >1,000 times enriched and Ag-Au-Pt-Pd >100 times enriched over bulk continental crust. Mineable portions have about 5.5 wt percent Mo, 3.5 wt percent Ni, and 1 g/t PGE + Au. A six-point 187 Os/ 188 Os versus 187 Re/ 188 Os isochron on molybdenum-nickel ore samples defi...
150 CitationsSource