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首页> 外文期刊>Geology, Geophysics & Environment >A palynology and paleoenvironmental study of a section from the Amansiodo-1 well, Anambra Basin, southeastern Nigeria
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A palynology and paleoenvironmental study of a section from the Amansiodo-1 well, Anambra Basin, southeastern Nigeria

机译：尼日利亚东南部的Anambra盆地的Amansiodo-1井的一部分腭学和古环境研究

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摘要

Palynological analysis was carried out on twenty (20) ditch cutting samples from a section (1284.73- 1496.57 m) of the Amansiodo-1 well, Anambra Basin, southeastern Nigeria with the aim of determining the age, biozone, and depositional environment of the sediments within the depth interval. The laboratory techniques of digesting sediments in hydrochloric and hydrofluoric acids for silicates and carbonates removal were followed to process the samples for the recovery of palynomorphs. Fifty two (52) palynomorph specimens were recovered. An assemblage zone of Echitriporites trianguliformis Zone has been established. The section was dated to the upper Maastrichtian due to the occurrences of age diagnostic marker species such as: Cingulatisporites ornatus, Distaverrusporites simplex, Proteacidites sigalii, Dinogymnium cf auclaense, Echitriporites trianguliformis and Retidiporites magdalensis. Based on the palynomorph marine index and environmental indicator flora, the section was inferred to be deposited in marine to brackish (coastal) environments with little influence of fresh water.
机译：来自尼日利亚东南部的Amansiodo-1井的一部分（1284.73-1496.57米）的二十（20）张切割样品进行了术语分析，​​目的是确定沉积物的年龄，生物波西和沉积环境在深度间隔内。随后盐酸盐和氢氟酸消化沉积物的实验室技术，然后进行碳酸酯去除，从而处理捕获野生鱼的样品。恢复五十二（52）次捕捞的野生猴样品。已经建立了Echitriporites Triangulificis区的组合区域。由于年龄诊断标志物种，如：Cingulatisporites Ornatus，Distaverruspority Simplex，Proteacidites Sigalii，二硫胺，乙酸曲线肌，Echitriporites Triangulificis和Retidiporites Magdalensis，该截面截图所述部分。基于Palynomorph Marine指数和环境指标Flora，该部分被推断为在海洋海军陆战队中沉积，淡水影响很小。

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