A Study on the Classification and Well-Logging Identification of Eclogite in the Main Hole of Chinese Continental Scientific Drilling Project
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- 作者：Jing Jian'en ; Wei Wenbo ; Jin Sheng ; Ye Gaofeng ; Deng Ming
- 关键词：Chinese Continental Scientific Drilling (CCSD) ; ultrahigh pressure metamorphic rock ; eclogite ; well-logging ; lithology identification ; classification
- 刊名：Journal of China University of Geosciences
- 出版年：2007
- 出版时间：December 2007
- 年：2007
- 卷：18
- 期：4
- 页码：357-365
文摘
Eclogite, one of the important lithologies in the main hole of the Chinese Continental Scientific Drilling (CCSD) Project, exists above the depth of 3 245 m and has distinctive responses of gamma-ray, compensating density and neutron well-logging, and so on. In this study, according to the diversities of minerals and chemical components and well-logging responses, eclogites are classified from three aspects of origin, content of oxygen, and sub-mineral. We studied the logging identification method for eclogite sub-classes based on multi-element statistics and reconstructed 11 kinds of eclogite. As a result, eclogites can be divided into 6 types using well logs. In the light of this recognition, the eclogite in the main hole is divided into 20 sections, and the distribution characters of all sub-classes of eclogite are analyzed, which will provide important data for geological research of CCSD.