Comprehensive application of digital borehole camera in the geological survey of coral reefs

摘要

Despite the significance of coral reefs as resources for development and research, only a limited amount of drilling surveys have been done on coral reefs, and obtaining comprehensive geological information remains difficultly to obtained.In the Chenhang Island survey, the digital borehole camera technology was utilized for the first time in China to provide guidance and acquire firsthand information of coral reefs, including anomalies in the rock body (e.g.fissures, cavities, traces of biological activities, interfaces, foreign strata and substances, color variations, etc), which also helped determine the causes of low or zero coring rates.In addition, data acquired by borehole camera can be used to evaluate the integrity of coral reefs.It can be concluded that: (1) the borehole camera system is an accurate and effective tool for determining the geological characteristics of coral reefs;(2) the system can serve important purposes in the geological survey of coral reefs.