A bief introduction to our group

Rocking Mantle Group, NJU

  • The Rocking Mantle Group in Nanjing University are mainly engaged in the research of Igneous Petrology and Mantle Geochemistry.

  • Based on the field investigation, petrographic observation and geochemical study utilizing integrated tracer of elements and isotopes (e.g.,Sr, Nd, Pb, Hf and Mg) of mantle-derived volcanic rocks , we are aiming to study: (1) the chemical composition and evolution of mantle, (2) the melting process occurred in mantle, and (3) the deep and shallow evolution of magma.

  • For the past years, our research primarily focused on the Intraplate Magmatism, including Cenozoic basalt in eastern China and oceanic island basalt (OIB) on the Pacific Plate.

        1, Cenozoic basalts in northeastern China

    The Cenozoic basalts in eastern China are mostly located in the northeast of China (Fig. 1). Recently, we have transferred our study area from northern and southern China to northeastern China. The type of Cenozoic magmatism in northeastern China is various, which varies from monogenetic volcanoes (mainly alkaline basalts) to small-scale flood basalts (mainly tholeiites) and from sodic to potassic, even ultra-potassic in chemical compositions. Simultaneously, their distribution patterns over time and space are also distinctive. Thus, we will systematically study these basalts at the respects of their spacious and temporal distributions, magmatic source features, melting conditions and corresponding background and processes in the deep.

    Figure 1.  The distribution diagram of the Cenozoic basalts in northeastern China

    2, Oceanic basalts

    Through the participation in International Ocean Discovery Project (IODP), we commenced researches on source compositions and deep processes of OIB samples which from Hawaii Islands, Louisville seamount chain and South China Sea seamounts (Fig. 2). Furthermore, based on these oceanic samples, the study of magnesium (Mg) isotopic geochemistry has been undertaken.

    Figure 2. The distribution diagram of our oceanic samples