The lacustrine fine-grained sedimentary rocks in the upper interval of fourth member Eocene Shahejie Formation (Es4s) Dongying Depression are important shale oil exploration targets Bohai Bay Basin. They widely distributed and rich organic matter. In this study, samples were observed under optical microscope FESEM, combined with geochemical test physical property analysis to study characteristi...

In the Palaeoproterozoic Nagssugtoqidian orogen of West Greenland reworked Archaean and juvenile Proterozoic orthogneisses occur side by side and are difficult to differentiate in the field. Archaean gneisses have tonalitic to trondhjemitic compositions with relatively low Al2O3 and Sr, and may have been derived from magmas formed by melting of basaltic or amphibolitic rocks at moderate pressur...

During the last stages of the eruption of syn-rift basalts along the East Greenland Margin, debris flows and/or pyroclastic deposits were emplaced at Ocean Drilling Program Sites 915 and 916. The deposits and the tops of the lava flows at Site 918 were altered by subaerial weathering processes as indicated by downhole changes in mineral and chemical composition, and by the mineral paragenesis. ...

The Isua greenstone belt (Fig. 1) contains the oldest known, relatively well preserved, metavolcanic and metasedimentary rocks on Earth. The rocks are all deformed and many were substantially altered by metasomatism, but both the deformation and metasomatism were heterogeneous. Transitional stages can be seen from relatively well preserved primary volcanic and sedimentary structures to schists ...

We present three-dimensional (3D) models of the present-day steady-state conductive thermal field and strength distribution in lithosphere beneath Central Andes. Our primary objective was to investigate influence that structure Andean has on its rheological state, relationship between latter active deformation region. used our previous data-driven gravity-constrained 3D density model as startin...