Geometric relationship between the Scrip Nappe and metamorphic isograds in the northern Adams River area, Monashee Mountains, British Columbia
Geometric relationship between the Scrip Nappe and metamorphic isograds in the northern Adams River area, Monashee Mountains, British Columbia
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不列颠哥伦比亚省莫纳西山脉亚当斯河北部地区斯克里普推覆体与变质等梯度之间的几何关系
DOI：
10.1139/e89-051
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发表时间：
1989
影响因子：
1.4
通讯作者：
P. Simony
中科院分区：
文献类型：
--
作者：
J. Sevigny;P. Simony
在不列颠哥伦比亚省莫纳西山脉的北部亚当斯河地区，Scrip推覆体的轴线可以向上追踪，穿过晚元古代马贼溪群的所有地层单位，向西延伸到始新世北汤普森断层截断的地方。Scrip推覆体被北东向的等斜F2同轴褶皱所褶皱，轴面向西南倾斜，振幅约6 Km。由白云母出露等值线的表面痕迹定义的变质顶峰，由一系列西北-东南走向的等径反形体和同源异形体组成，晚于早白垩世F2褶皱，早于始新世51-45 Ma的正断层。
In the northern Adams River area of the Monashee Mountains, British Columbia, the axial trace of the Scrip Nappe, a megascopic southwest-verging recumbent F1 anticline, can be traced upward through all stratigraphic units of the Late Proterozoic Horsethief Creek Group westward to where it is truncated by the Eocene North Thompson Fault. The Scrip Nappe has been coaxially folded by a northeast-verging, isoclinal F2 synform with a southwest-dipping axial surface and an amplitude of about 6 km. A metamorphic culmination, defined by the surface trace of the muscovite-out isograd and consisting of a series of northwest–southeast-striking isogradic antiforms and synforms, postdates Early Cretaceous F2 folding and predates Eocene normal faulting at 51–45 Ma.