Investigation of Crustal Contraction Mechanisms in the Brittle/Ductile Transition Zone

脆塑过渡带地壳收缩机制研究

• 批准号: 8721302
• 负责人: Sharon Mosher
• 金额: $ 7.39万
• 依托单位: University of Texas at Austin
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 1988
• 资助国家: 美国
• 起止时间: 1988-04-15 至 1991-03-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=8721302&HistoricalAwards=false
• 关键词: Investigation; Crustal; Contraction; Mechanisms; Brittle

Considerable research effort has been directed at understanding the controls on initiation and propagation of thrust faults in contractional deformation environments. Much of this work has been done on upper crustal, thin-skinned thrust belts. This proposal will extend this work to a thrust zone that formed at intermediate crustal levels near the brittle/ductile transition. The zone lies within the Tuscan nappe of the Northern Apennines, Italy, and is exposed in a window through the Liquride sequences located west of the Apuane Alps. The study will focused on the mechanism that accommodate the contractional deformation and will include study of environmental conditions and the role of fluids. Results of this research should contribute to understanding of how thrust zones at mid-crustal levels initiate and propagate hand thus allow better interpretation of deep crustal structure.

相当多的研究工作是为了了解 逆冲断层的形成和扩展控制 收缩变形环境 这项工作的大部分是 形成于地壳上部的薄皮冲断带。 这项建议会 将这一工作扩展到形成于中地壳的逆冲带， 脆性/韧性转变附近的水平。 该区域位于 位于意大利亚平宁山脉北方的托斯卡纳推覆体， 通过位于Apuane阿尔卑斯山以西的Liquride层序的窗口。 这项研究将集中于适应 收缩变形，并将包括环境的研究 条件和流体的作用。 这项研究的结果应该 有助于了解地壳中层的逆冲带 从而允许更好地解释深度 地壳结构