依-舒地堑汤原断陷自然伽马能谱与岩性及矿物成分的关系

Relationships Between Natural Gamma Ray Spectrometry (NGS) and Rock Property and Mineralogical Composition

根据依舒地堑汤原断陷区汤参２井的７４块取芯岩样自然伽马能谱数据，以及室内测量和分析的岩样岩性参数，建立了自然伽马能谱的数据库管理系统，在讨论了该地区的放射性核素钍（Ｔｈ），铀（Ｕ）和钾（Ｋ）的分布规律的基础上，从地质和物理条件入手，通过数据库管理系统得到了自然伽马能谱与岩性、粘土矿物类型间的关系，从而为该地区的地层评价和自然伽马能谱测井解释提供充分的理论依据。

According to natural Gamma ray spectrometry (NGS) data of 74 rock specimen of Tangyuan well 2 and according to measured and analysed rock character parameters of rock specimen in the laboratory, we have discussed the content distribution law of thorium (Th), uranium (U) and potassium (K) in this graben. We have built the ralationships between NGS and rock property and mineralogical composition, which will provide scientific basis for the information about NGSL.