Palaeomagnetic data, late precambrian magnetostratigraphy and tectonic evolution of Eastern China

Abstract

In this paper middle and upper Proterozoic (1900-1600 Ma) APW paths are presented for North and South China based on palaeomagnetic results obtained from the Jixian, Yangzi Gorges, Shennongjia and Fuzhou areas in eastern China. Two or three “loops” are present; the second of these has an age of about 1000-800 Ma and is probably roughly equivalent to the Sveconorwegian and Grenville loops. APW paths, loops, reversed polarity zones and pole positions, combined with geological data, permit definition of several markers that are useful in regional correlation. These form the basis for a proposed stratigraphic subdivision of the middle and upper Proterozoic in China. A tentative palaeogeographic map has been drawn for the North China and Yangzi Blocks for the period from 1700 Ma to 600 Ma.