Density of UHP Metamorphic Rocks from CCSD Main Hole
For learning the densities of UHP metamorphic rocks and the differences between logging and core test density, this study displayed the density profiles obtained by well logging and core test at the 5 000 m deep CCSD-MH (Chinese Continental Scientific Drilling Main Hole), compared log density with cores. The upper section (100-700 and 1 600-2 000 m) of CCSD-MH, which consists of mainly eclogite and amphibolite, displays high densities (2.8-3.6 g/cm3). The lower section (2 000-5 000 m), which consists of mainly orthogneiss and paragneiss, displays low densities (2.6-2.7 g/cm3). The retrogression lowered the density of eclogite. Thus the density profile of CCSD-MH was mainly governed by lithologies. The variation of log density was coherent with that of core test on the whole, and the log density was a little lower than cores. The density log is severely affected by the cavings and breakouts of borehole, so it is necessary to correct the density log properly.
density well logging core test UHP metamorphic rocks CCSD Mam Hole.
Luo Miao Pan Heping Zhang Hongjie Ahmed M A Salim
Institute of Geophysics and Geomatics, China University of Geosciences, Wuhan 430074, China Faculty of Earth Resources, China University of Geosciences, Wuhan 430074, China
国际会议
The IPACES 6th Annual Meeting(“现代地球科学，交流与合作国际学术研讨会暨第六届IPACES学术年会)
武汉
英文
13-15
2007-04-25（万方平台首次上网日期，不代表论文的发表时间）