Processing And Analysis To Borehole Magnetic & Geothermal Data Of China Continent Scientific Drilling

China Continent Scientific Drilling (CCSD) Project sunk the first 5km deep well using the ultra-deep drilling technology in the east Dabie-Sulu ultra-high-pressure metamorphic (UHPM) zone in China generated by the collision of China-Korea plate and Yangtze plate in mesozoic which has a global geosciences significance. It also has an important significance to the research study of geosciences in China and important to the solution of many key problems of China continent. Geophysical logging is the basic component of CCSD. Plenty of the high precision primary information of borehole temperature, pressure, magnetic field, gravity field, thermal field and self potential data provided by logging is propitious to gathering and study of characters of rocks in the original circumstances. It provides the basal data and information for the study of mechanism of UHPM's generation and return, component and structure of deep mass, process of geodynamics, mutual actions of the crust and mantle, exploration of resources, mechanism of earthquake and so on.Two pilot holes (CCSD-PP1 and CCSD-PP2) were drilled experimentally by CCSD orderly. The drilling of primary hole (CCSD-1) was start at June of 2001 and finished at April of 2005 with the 5118.20m total depth. Much valuable geophysical and geological data was obtained by times logging in the period.A series of data processing and analysis was carried out here based on the borehole temperature data, borehole susceptibility data and magnetic data of 100-3600m. Many parameters of the borehole magnetic field, thermal field and rock properties were calculated and much valuable basic data and information was obtained. The primary anomaly of the borehole magnetic field and thermal field was interpreted. The relationship between the thermal field, the magnetic field and the rock properties was discussed and some problems need much more study was brought out.The primary processing here includes:(1) Preprocessing of the logging data. It mostly includes the depth correction from 100 to 2000m, the consistency processing and coherence processing of the data from 0 to 3600m.