TY - JOUR
T1 - Complex polytypism
T2 - relationships between serpentine structural characteristics and deformation
AU - Banfield, J. F.
AU - Bailey, S. W.
AU - Barker, W. W.
AU - Smith, R. C.
PY - 1995
Y1 - 1995
N2 - Serpentinite from Woods Chrome Mine, Lancaster County, Pennsylvania, consists of planar serpentine, randomly interstratified serpentine-chlorite, a series of phases based on regular interstratification of serpentine and chlorite, minor chlorite, polygonal serpentine, and antigorite. The assemblage contains planar serpentines with long-range order in octahedral cation sequences but with random b/3 (and possibly a/3) displacements between adjacent layers. The strong lineation in the foliation defined by the silicate sheets parallels either a or b, suggesting serpentine crystals were rotated, recrystallized, or both during shear deformation. The paper suggests that for crystals with b parallel to the lineation, deformation induced regular layer displacements. For crystals with a parallel to the lineation, periodic displacements of OH planes may have promoted development of regular octahedral cation sequences. -from Authors
AB - Serpentinite from Woods Chrome Mine, Lancaster County, Pennsylvania, consists of planar serpentine, randomly interstratified serpentine-chlorite, a series of phases based on regular interstratification of serpentine and chlorite, minor chlorite, polygonal serpentine, and antigorite. The assemblage contains planar serpentines with long-range order in octahedral cation sequences but with random b/3 (and possibly a/3) displacements between adjacent layers. The strong lineation in the foliation defined by the silicate sheets parallels either a or b, suggesting serpentine crystals were rotated, recrystallized, or both during shear deformation. The paper suggests that for crystals with b parallel to the lineation, deformation induced regular layer displacements. For crystals with a parallel to the lineation, periodic displacements of OH planes may have promoted development of regular octahedral cation sequences. -from Authors
UR - http://www.scopus.com/inward/record.url?scp=0029542390&partnerID=8YFLogxK
U2 - 10.2138/am-1995-11-1203
DO - 10.2138/am-1995-11-1203
M3 - Article
AN - SCOPUS:0029542390
SN - 0003-004X
VL - 80
SP - 1116
EP - 1131
JO - American Mineralogist
JF - American Mineralogist
IS - 11-12
ER -