大陆深钻超高压变质岩中可溶有机质的提取研究

目前可溶有机质的研究大多集中在沉积岩中。研究超高压变质岩中有机质有助于探索和研究超高压这种极端地质条件下有机质的来源、分布、保存和演化等一系列问题。由于大陆深钻超高压变质岩中可溶有机质含量非常低，为防止泥浆、钻井液及碎样、提取、分析等过程带来污染，尽可能获取岩心样品原始的有机质信息，提高样品可溶有机质的提取效率，本文采用超声-试剂、超声-有机试剂等清洗手段消除可能污染，利用索氏抽提、超声抽提等连续抽提的方法提高抽提效率，并与可能存在的污染物类型进行对比研究，确保岩心抽提有机物为样品原始有机物，为进一步研究超高压变质岩中可溶有机质的赋存状态提供前提保证。

The extraction of soluble organic matter in UHP metamorphic rock from the main drill hole of the Chinese Continental Scientific Drilling Project

At present, the extraction of the soluble organic matter is mainly applied to sedimentary rocks for exploring oil and gas. The contents of the soluble organic matter in UHP metamorphic rocks from CCSD are usually at the level of trace amounts. It is therefore very important to prevent pollution from drilling mud, sample preparation and processing analysis and to improve extraction efficiency. This paper has dealt with the removal of external contaminants, the improvement of the extraction efficiency by ultrasonic wash, Soxhlet extraction and ultrasonic extraction, and the elimination of pollution in core samples by comparing total ion chromatogram between the samples and the pollutants.