Structural and Stratigraphic Study of the Humber Arm Allochthon of Western Newfoundland: Implications for StableMargin Dev., Obduction, Accretion, and Melange Formation

首席研究员将在加拿大纽芬兰西部的亨伯阿姆特龙进行详细的测绘和结构分析。野外工作将把以前对异土体最高构造切片的详细测绘扩展到较低的沉积构造切片。这种测绘将使进一步的研究能够在严格限定的古生物年龄、砂岩、泥岩和燧石的物源研究以及标准的岩性对比的基础上，从地层学上对异体进行细分。以期对原大西洋型边缘的地层发育，同种异体的组合、搬运和构造发育，同种异体内部混杂岩带的形成，蛇绿岩的逆冲机制有更清晰的认识。

The principal investigator will conduct detailed mapping and structural analysis in the Humber Arm Allochthon of western Newfoundland, Canada. The field work will extend previous detailed mapping in the highest structural slices of the allochthon to the lower sedimentary structural slices. This mapping will allow further studies to stratigraphically subdivide the allochthon on the basis of well-constrained paleontological age fixes, provenance studies of sandstones, mudstones and cherts, in addition to standard lithologic correlation. In this way we hope to gain a clearer insight into the stratigraphic development of the former Atlantic type margin, the assembly, transport and structural development of the allochthon, the formation of melange zones within the allochthon, and the mechanism of ophiolite obduction.