By means of kerogen purification, the proton induced X-ray emission (PIXE) and instrumental neutron activation analysis (INAA), the authors have studied the org
238 marine carbonate samples were collected from seven sedimentary sections ofthe entire late Palaeozoic (Permian, Carboniferous and Devonian) in the Upper Yangtz
In light of the principle of sequence stratigraphy, detailed analysis of depositionalsequences and systematical carbon isotope measurements were done for the Tr
The Aktubaik gold deposit lies in the Altay middle-high mountains area, Xinjiang, hosted by the Pa-laeo- and Mesoproterozoic Xemirxek Group. It is the first gol