Intra-arc Tectonics in the S.E. Coast Plutonic Complex, B.C.: The Role of Plutonism vs. Regional Deformation

9406690收敛边缘环境中的棕色造山作用通常涉及基岩侵位、深部埋藏和表壳岩石的巴罗夫变质作用、地体的逆冲堆积和走滑位移。然而，这些过程之间的联系并没有完全解决。深部埋藏和变质作用的原因通常被归因于逆冲加载；这一提议考虑了大体积岩浆侵位也可以完成所需加载的想法。同样，大体积的钚很难解释它们如何被安置在会聚的边缘，因为它们可能需要膨胀空间。该项目将与加拿大地质调查局的工作人员一起，在不列颠哥伦比亚省的海岸深成复合体中批判性地研究这些问题。结果将检验岩浆加载想法的可行性，并将有助于解决大型浴场的空间问题。

9406690 Brown In convergent margin settings orogensis commonly involves emplacement of batholiths, deep burial and Barovian metamorphism of supracrustal rocks, thrust stacking of terranes and strike-slip displacements. The connection between theses processes is not entirely resolved however. The cause of deep burial and metamorphism is commonly ascribed to thrust loading; this proposal entertains the idea that large-volume magma emplacement could also accomplish the required loading. Similarly, large-volume plutons present difficulties in explaining how they could be emplaced in a convergent margin, as they presumably require dilatational space. This project will critically examine these issues in the Coast Plutonic Complex of British Columbia in conjunction with personnel of the Geological Survey of Canada. Results will test the viability of the magma loading idea and will contribute to the resolution of the space problem for large batholiths.