V2EX diamicton

Diamicton

释义 Definition

diamicton(杂基沉积物/混杂沉积物):一种颗粒大小极不均一的未固结沉积物,通常由泥、砂到砾石甚至巨砾混合组成,常见于冰川环境(如冰碛物),但也可能由碎屑流、滑塌等过程形成。(相关术语:固结后的岩石常称 diamictite。)

发音 Pronunciation (IPA)

/damktn/

例句 Examples

The valley floor is covered by diamicton left by the retreating glacier.
山谷底部覆盖着退缩冰川留下的杂基沉积物。

In the drill cores, the diamicton contains striated clasts, suggesting deposition in a glacial setting rather than by a simple landslide.
在钻孔岩芯中,这种杂基沉积物含有带擦痕的砾石,提示其更可能形成于冰川环境,而非普通滑坡堆积。

词源 Etymology

diamicton由希腊语词根构成:**dia-**(“穿过、不同/混合”)+ -mict-(来自 mikte/mix,“混合”)+ -on(名词后缀)。整体强调其“混杂、粒径跨度很大”的特征,用于描述一种不分选或弱分选的混合沉积物。

相关词 Related Words

文学与著作中的用例 Literary Works

  • Glacial Geology: Ice Sheets and Landforms(Bennett & Glasser):讨论冰川沉积体系时常使用 diamicton 来描述冰碛相关的混杂沉积。
  • Principles of Sedimentology and Stratigraphy(Sam Boggs Jr.):在沉积物分类与成因解释中提及 diamicton/diamictite 等术语。
  • Sedimentology and Stratigraphy(Nichols):涉及不分选沉积与重力流过程时,会用 diamicton 作为描述性术语。
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