GEOCHEMICAL BEHAVIORS AND CHARACTERISTICS OF IRON ISOTOPE IN THE FERROAN DOLOMITE FROM WELL XIYONG 2

The dolomite was discovered more than 200 years ago, and its research is still one of the frontier subjects in Earth Sciences. The study of dolomite on Xisha Islands is over 35 a, and ferroan dolomite was found for 10 a, which are the research hotspots. On the basis of earlier study of dolomites in well Xiyong 2, the core samples of typical ferroan dolomite are further collected for Fe isotope analysis in this study. By comparing characteristics of Fe isotope of various geological reservoirs, the properties, characteristics and the parent sources of the Fe isotope of dolomites from well Xiyong 2 are elaborated. It is suggested to strengthen the investment and correlate the geochemical characteristics with the Fe isotope test results of the volcanic rock samples from the Gajianshi Island. This study is of great value for the study of the genetic characteristics and mechanism of ferroan dolomite.