
[土壤] 风化壳
In north of China, Latosol-like soils which were exposed to the earths surface were developed from red Paleosol and red paleo-weathered crust.
现今出露于中国北方地表的红色土壤是在红色古土壤和红色古风化壳上发育的,而且大多经历了不连续的成土过程。
The gas of central gas field of Shan-Gan-Ning basin is produced from paleo-weathered crust dolostone reserviors of Majiagou formation on top Ordovician.
陕甘宁盆地中部气田的天然气产于奥陶系顶部古风化亮马家沟组白云岩储层中,储集空间的形成是不同期次溶蚀作用和充填作用相互作用的结果。
Gas sources of Ordovician weathered crust gas reservoirs in Central gas Field in the Ordos basin are an important problem that has not been completely solved.
鄂尔多斯盆地中部气田奥陶系风化壳天然气藏的气源问题是迄今尚有争议的重要问题。
The long-term palaeokarstification in different stages resulted in the gas reservoir of weathered crust of Ordovician in the central part of Shaanganning Basin.
陕甘宁盆地中部奥陶系风化壳天然气储集层的形成,是不同期次古岩溶长期作用的结果。
The giant central gas field in E′erduosi Basin is a stratigraphic gas reservoirs developed in the ancient weathered crust of carbonate rocks on the top of the Ordovician.
鄂尔多斯盆地中部大气田是发育在奥陶系顶碳酸盐岩古风化壳中的地层油气藏。
"weathered crust"是地质学术语,中文译为"风化壳",指地表岩石经长期物理、化学和生物作用形成的松散表层物质。其形成需要三个核心条件:母岩暴露地表、持续风化作用、残留物堆积。根据中国地质科学院《工程地质手册》,典型风化壳包含四层结构:①腐殖质层(0-0.3米),②残积层(0.3-2米),③半风化层(2-5米),④基岩层。美国地质调查局(USGS)研究显示,花岗岩风化壳厚度在热带地区可达150米,而干旱区仅1-3米。风化壳对工程建设具有双重影响:一方面可作为天然地基持力层,另一方面其渗透性差异可能导致地基不均匀沉降。中国西北地区黄土风化壳中发现的稀土元素富集现象,已被《中国科学:地球科学》证实为重要矿产资源。
Weathered Crust 的详细解释
1. 定义与基本概念
"Weathered crust" 译为风化壳,指地表岩石经过长期风化作用后,残留的碎屑物质和新生成的化学残余物质形成的表层结构。这一地质结构覆盖在未风化的基岩之上,是岩石物理、化学和生物风化过程的综合产物。
2. 构成与分类
3. 相关术语与实例
4. 形成过程
风化壳的形成需经历物理崩解(如温差导致岩石破裂)和化学分解(如水解、氧化)等阶段,最终残留物质堆积形成稳定表层。
示例:
"The softer rock has been weathered away into soil, leaving a weathered crust on the surface."
(较软的岩石风化成土壤,地表残留风化壳。)
总结
"Weathered crust" 是地质学中描述岩石风化残留层的术语,其形态和成分受气候、岩性等因素影响。如需进一步了解具体案例或分类细节,可参考地质学专业文献。
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