a1/ Magmatic flow is responsible for variation in the thickness of the mafic dike, the elongation of schlierens (aggregates of dark minerals) and for the shearing of the dike. a2-3/ Close up on a magmatic shear responsible for the apparent sinistral offset of the mafic dike.
www.geosci.usyd.edu.au/users/prey/FieldTrips/Kimberleys... www.geosci.usyd.edu.au/users/prey/FieldTrips/Kimberleys/kimberleys.html
Given problems associated with the Rb-Sr and K-Ar dating of mafic dikes observed in many mafic dike studies, modern geochronologic methods, especially the high-precision dating of dikes by the U-Pb method, combined with geochemistry, petrology and paleomagnetism are needed to better understand the age and distribution...
mason.gmu.edu/~sharlan/mafic_dikes_beartooth_mountains.... mason.gmu.edu/~sharlan/mafic_dikes_beartooth_mountains.htm
The overall characteristics of the FH dikes are consistent with intrusion at shallow crustal levels along distinct fractures. Detailed documentation of the dike system at FH provides insight into the behavior of mafic magmas at a depth comparable to the proposed high-level nuclear waste repository at Yucca Mountain...
gsa.confex.com/gsa/2005AM/finalprogram/abstract_94610.h... gsa.confex.com/gsa/2005AM/finalprogram/abstract_94610.htm
subswarms of near parallel dikes are commonly 20-75 km long. Longer dikes are typically basaltic andesites (53 -56 wt. % SiO2). Within the NW-striking Pie Town subswarm, exposed dike length (75, 24 and 2 ... Cross cutting relationships of undated dikes near Riley and La Joya imply a westerly migrating focus of mafic magmatism.
gsa.confex.com/gsa/2002AM/finalprogram/abstract_43856.h... gsa.confex.com/gsa/2002AM/finalprogram/abstract_43856.htm
The occurrence of mafic dike swarms in Archean and Paleoproterozoic terranes is often cited as evidence for mantle plume activity associated with abnormally ...
linkinghub.elsevier.com/retrieve/pii/S0012821X04004030
Certain other dikes/sills, chiefly mafic microdiorites, cut the calc-alkaline plutons but are themselves deuterically altered; at least two of these mafic microdiorites near the English Peak body possess hornfelsic textures.
petrology.oxfordjournals.org/cgi/content/abstract/34/1/... petrology.oxfordjournals.org/cgi/content/abstract/34/1/63
turally different from those mafic dikes lacking such joints. ... A, Circular and elliptical cylindrical columnar joints in mafic dike roughly 4 miles due ...
www.jstor.org/stable/30063944
Complex swarms of mafic dikes extend across New England and Atlantic Canada. ... Mafic dike swarms have intruded the Appalachian orogen work which has ...
pages.cthome.net/gregmchone/McHone_GSASpPaper92.pdf
A mafic dike cuts the west end of the northern outcrop. We discussed with students the ease of assigning it a Keweenawan age. ... Figure of a mafic dike cutting the leuco gabbro, in turn intruded by a pegmatitic granitoid along the same plane, then cross cut by several other pegmatitic granitoids.
maps.unomaha.edu/Maher/Fieldtrip99/
Metamorphism of the dikes in the foreland occurred shortly after their emplacement, within the resolution of the argon system. We suggest that crustal heating during dike emplacement or heat derived from the individual dikes caused the development of metamorphic minerals and textures.
geology.geoscienceworld.org/cgi/content/abstract/27/9/7... geology.geoscienceworld.org/cgi/content/abstract/27/9/775