TY - JOUR
T1 - Backflow and margin-parallel shear within an ancient subduction complex
AU - Hansen, V. L.
PY - 1992/1/1
Y1 - 1992/1/1
N2 - Lineated and foliated tectonics of the Teslin suture zone, Yukon, represent the deep-seated part of a west-dipping subduction complex that formed seaward of western North America in Permian-Triassic time. The tectonites were progressively underplated onto the hanging-wall plate during B-type subduction. With continued subduction and underplating, the boundary between the hanging wall and subduction channel migrated oceanward, resulting in "growth' of the hanging-wall plate at depth. These tectonites preserve a progressive record of backflow, dextral margin-parallel shear, and downflow within the subduction channel. Early Jurassic A-type subduction of the leading edge of western North America resulted in eastward overthrusting of the tectonites as a coherent block onto North American strata. These tectonites provide empirical evidence that backflow, margin-parallel displacement, and downflow can all occur within the deeper parts of subduction zones. -Author
AB - Lineated and foliated tectonics of the Teslin suture zone, Yukon, represent the deep-seated part of a west-dipping subduction complex that formed seaward of western North America in Permian-Triassic time. The tectonites were progressively underplated onto the hanging-wall plate during B-type subduction. With continued subduction and underplating, the boundary between the hanging wall and subduction channel migrated oceanward, resulting in "growth' of the hanging-wall plate at depth. These tectonites preserve a progressive record of backflow, dextral margin-parallel shear, and downflow within the subduction channel. Early Jurassic A-type subduction of the leading edge of western North America resulted in eastward overthrusting of the tectonites as a coherent block onto North American strata. These tectonites provide empirical evidence that backflow, margin-parallel displacement, and downflow can all occur within the deeper parts of subduction zones. -Author
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U2 - 10.1130/0091-7613(1992)020<0071:BAMPSW>2.3.CO;2
DO - 10.1130/0091-7613(1992)020<0071:BAMPSW>2.3.CO;2
M3 - Article
AN - SCOPUS:84879887026
SN - 0091-7613
VL - 20
SP - 71
EP - 74
JO - Geology
JF - Geology
IS - 1
ER -