砂岩岩脉(岩墙、岩床)的一种可能成因——冲蚀沟槽的充填

基金项目:

中国石油大学资助重点课题部分成果

FILLING OF GULLIES BY EOLIAN SAND-A POSSIBLE GENESIS OF SANDSTONE VEINS (DIKES AND SILLS)

摘要: 黄河三角洲的边滩、心滩上发育了大量冲蚀沟槽(冲槽)。这些冲蚀沟槽深数厘米至1m~2m,宽数厘米至数米,长数十厘米至十几、二十余米,但以深数十厘米,宽数厘米至十余厘米,长数米者多见。形态多样,有直立板片状、直立楔状、"上"状、梯形状、"U"形状及树枝状等,其内有时被风成砂充填。经成岩作用后,它们便会转变成砂岩岩脉(岩墙、岩床)。因此,冲蚀沟槽的(砂)充填可能是一种砂岩岩脉(岩墙、岩床)的形成方式。
- 砂岩岩脉(岩墙、岩床) /
- 成因 /
- 冲蚀沟槽 /
- 风成砂 /
- 充填
Abstract: A great number of gullies have been recognized in the Huanghe River delta.These gullies range in depth from several cm to more than 1 m(usually tens of cm),in width from several cm to several m(usually ten cm or so),and in length from a few decades of cm to twenty m or so (usually several m).They also have diverse morphologies:erect tabular-flaky,vertical wedge-shaped,"⊥"-and "U"-shaped,trapezoidal and dendritic forms,which are usually filled by eolian sand and then turned into sandstone veins (dikes and sills) through diagenesis.The author interpretes the sand filling of alluvial gullies as a possible genesis of sandstone veins (dikes and sills) in the study area.
- sandstone veins (dikes and sills) /
- genesis /
- gully /
- eolian sand /
- filling