COLLABORATIVE RESEARCH: Strain Distribution within the Lewis Thrust Sheet and Northern Sawtooth Thrust Belt: Compatibility with Critical Wedge Model

合作研究：刘易斯冲断片和北部锯齿冲断带内的应变分布：与临界楔模型的兼容性

• 批准号: 9405557
• 负责人: Gautam Mitra
• 金额: $ 8.76万
• 依托单位: University of Rochester
• 依托单位国家: 美国
• 项目类别: Continuing Grant
• 财政年份: 1994
• 资助国家: 美国
• 起止时间: 1994-09-15 至 1998-08-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=9405557&HistoricalAwards=false
• 关键词: COLLABORATIVE; RESEARCH; Strain; Distribution; within

9405557 Mitra This collaborative project will test the generally accepted critical wedge theory for the development of fold and thrust belts, by an integrated field and laboratory study of rocks in the Lewis thrust sheet in northwest Montana. According to the theory, strain should vary within the thrust belt as a function of the geometry of the sedimentary prism. The stratigraphy of the area is well known and lends itself to a test of the model. The geometry of the pre- deformational Proterozoic, Paleozoic and lower Mesozoic sedimentary basins will be determined and the amount and distribution of strain will be compared with that predicted by the model. Whether the existing theory is upheld or not, the results will have far- reaching significance for other fold and thrust belts, and for the prediction and recovery of oil and natural gas reserves in similar tectonic settings.

9405557 Mitra 该合作项目将通过对蒙大拿州西北部路易斯冲断层岩石的综合现场和实验室研究，测试普遍接受的褶皱和冲断带发育的临界楔理论。 根据该理论，冲断带内的应变应随沉积棱柱的几何形状而变化。 该地区的地层众所周知，适合对模型进行测试。 将确定变形前的元古代、古生界和下中生界沉积盆地的几何形状，并将应变的量和分布与模型预测的进行比较。 无论现有理论是否成立，该成果对于其他褶皱冲断带以及类似构造背景下的石油天然气储量预测和采收率都将具有深远的意义。