1 Introduction The ophiolitic and slightly metamorphic complexes in northeastern Jiangxi have been traditionally considered to be related to the Proterozoic “Banxi (=Penhsi) Group” of the Jiangnan Uplift in South China and have become a classic area for the study of pre-Sinian stratigraphy. However, since Zhao et al. (1995, 1996) and He et al. (1996, 2000) (the Zhao-He research group) reported their discoveries of Paleozoic Radiolaria from the siliceous rocks in the ophiolitic and meta…