基于放射测量工具的不符合性定义
S Salazar1, L A Castillo2, L Montes3
1Terrígeno Construcciones, Colombia.
概括
对白纪岩石的放射测量分析揭示了古氧化还原条件和沉积环境. 这项研究发现了八个不一致性,进步了我们对牧场子盆地的理解.
科学领域:
- 地质化学 地质化学
- 沉积物学的沉积物学
- 在平流体学上,平流体学是平流体学.
背景情况:
- 了解古老氧化还原条件对于描述沉积盆地和评估碳化合物潜力至关重要.
- 放射测年法为沉积环境和地质历史提供了洞察力.
研究的目的:
- 使用U-238,Th-232和K-40度在Rancheria亚盆地的白纪岩石进行放射性特征.
- 定义古老-氧化解层面,并确定沉积环境.
- 为了检测白到世的序列中的不一致性.
主要方法:
- 利用便携式马射线光谱仪测量U-238,Th-232和K-40在两个勘探井的切割样本.
- 分析了Th/Ua (自生) 和Th/U比率,以推断古回氧条件.
- 解释K/U和Th/U比率的突然变化以确定序列边界.
主要成果:
- 根据古老-减氧面积定义了12个区域,表明从陆地淡水转移到亚氧和无氧条件.
- 在阿瓜斯·布兰卡斯和莫利诺岩层中确定了无氧和无氧的环境,以和高为证.
- 在La Luna和Molino岩层中发现了高和authigenic,这表明有机物质的保存有利于碳化合物生成.
- 确定了八个白到中纪的不一致性,其中包括三个以前没有报告过的.
结论:
- 放射测量数据有效地描述了兰切里亚子流域的古老氧化还原条件和沉积环境.
- 该研究成功地确定了关键面,包括有利于碳化合物生成的面.
- 这项研究为识别不一致性建立了框架,这对于分层学相关性和流域分析至关重要.
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