¡¡¡¡Mechanisms of the UHPM belt by interpretating the analyzed data from the drill core, liquid aand gas samples taken from the hole,the in-situ logging data and information. The further aims are to reveal the deep materials constitution of the convergent plate margin,its mineralexation and fluid action,and to establish a deep laboratory for long-term cbser-vation and a base for research on deep crust materials,The project is listed as one of the National key science Enginering projects in the period of the ninth Five-Year-Plan. ¡¡¡¡
The Dabie-sulu region is located in the structurally deepest part of the orogenic belt.In this region, rocks of various types are widely distributed. Therefore accruate coring bits and high speed top drive system are required. To drill a 5000-meter-deep borehcle in crystalling rock demands bits with high efficiency, long-durability and less abrasion, The coring bits produced by Guilin DiamondIndustral LTD meet the requirement of the CCDS NO.1 pit project. Thus it has been appointed as of the main suppliers of CCDS project.
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