高校地质学报Issue(2)：230-238,9.
海相碳酸盐台地含钾层段旋回地层学响应和识别--以川中广安地区三叠系为例
Identification of the Potassium-rich Member in Carbonate Platform and Its Response to the Gamma Ray Well Logging from the Perspective of Cyclostratigraphy:A Case Study in Triassic of Guangan Area, in the Central Sichuan Basin
摘要
Abstract
To identify favorable salt-and potash-forming layer, we mainly rely on logging interpretation and coring verification. The continuously carbonate platform shows cyclical growing and recorded valuable information about the facies transition of carbonate rocks, which was synchronized with the relative sea-level cycles. This paper presents a method to preliminarily judge favorable potassium-rich intervals. By using natural gamma ray logging data and numerical simulation, high-frequency sedimentary cycles could be identified effectively from the sedimentary record. Then, we can inverse the distribution model and stacking patterns of these cycles, restore the ancient relative sea-level trends, and finally deduce the favorable salt-and potash-forming phases from the low-stand depositional system. On the basis of these principles, a case study has been taken in the Triassic strata of the Guang’an area, in the central Sichuan Basin. Our result show that the interval between the Fifth Member of the Jialingjiang Formation to the First Member of the Leikoupo Formation is the most potential salt-and potash-forming layer, which is consistent with the potassium-rich layer recognized in the drill cores. It shows that this method could effectively identify potassium rich layer from the marine carbonate platform.关键词
海相碳酸盐岩台地/沉积旋回/含钾层段/测井响应/三叠系/川中地区Key words
marine carbonate platform/depositional cycles/potassium-rich layer/well logging response/triassic/sichuan basin分类
天文与地球科学引用本文复制引用
龚大兴,周家云,陈科贵,李春梅,李萌..海相碳酸盐台地含钾层段旋回地层学响应和识别--以川中广安地区三叠系为例[J].高校地质学报,2014,(2):230-238,9.基金项目
国家973项目“中国陆块海相成钾规律及预测研究”（2011CB403000）；国家自然科学基金（41102060）资助 （）
