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Multi-tiered, disrupted crust of a sheet lava flow from the Diveghat Formation of Deccan Traps: Implications on emplacement mechanisms
Journal of Earth System Science ( IF 1.9 ) Pub Date : 2020-07-08 , DOI: 10.1007/s12040-020-01418-9
Gauri Dole , Shilpa Patil-Pillai , Vivek S Kale

The crust is a vesicular layer that caps the compact core of sheet lava flows. We describe for the first time, a crust composed of multiple layers (each distinguished by a chilled glassy rind) from the Diveghat Formation in the western Deccan Volcanic Province. The multiple layers of crust developed over a single compact core of a single sheet lava flow, are shown to have been sequentially deformed in multiple phases. This is interpreted to have resulted from the endogenous emplacement of lava in successive pulses (rather than as a continuous stream) during the extrusion of the sheet lava flow. This model has several implications on the mechanism of emplacement of sheet flows in continental flood basalt provinces.

中文翻译:

Deccan陷阱的Diveghat地层的片状熔岩流的多层破裂地壳:对安置机制的影响

地壳是一个囊泡层,覆盖了片状熔岩流的致密核心。我们第一次描述了由西德干火山省西部Diveghat组的多层组成的地壳(每个地壳以冷玻璃质外皮为特征)。在单层熔岩流的单个致密岩心上形成的多层地壳,显示已在多个阶段依次变形。可以认为这是由于在片状熔岩流挤压过程中,熔岩以连续脉冲(而不是连续流)的内生性定位而产生的。该模型对大陆洪水玄武岩省表层水流的入渗机制有一些影响。
更新日期:2020-07-08
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