Death Valley has a number of localities where this can be seen, some very clear, others subject to interpretation. Depends a bit on what scale you want to consider this--numerous dikes follow old faults for example. At larger scale, we suggested some time ago that the well known Death Valley turtlebacks are the floor of intrusive sheets that were injected along an active, mid-crustal detachment--I'll shamelessly paste in some references below. Marli Miller also has a little paper (could have been just an abstract though?) describing a small intrusion she thought was injected along the Amargosa fault--brittle low-angle normal fault system of the Death Valley "chaos". She is an avid photographer, and I'm sure could get you a spectacular photo if that is your main wish.

Terry Pavlis

Miller, Martin G., and Pavlis, T.L, The Black Mountains turtlebacks: Rosetta stones of Death Valley Tectonics, Earth Science Reviews, v.73, 115-138, 2005.

Serpa, Laura, and Pavlis, T.L., Three-dimensional model of the late Cenozoic history of the Death Valley region, southeastern California, Tectonics, 15, 1113-1128, 1996.

Pavlis, T.L., Fabric development in syn-tectonic intrusive sheets as a consequence of melt-dominated flow and thermal softening of the crust, Tectonophysics, 253, 1-31, 1996.

Mancktelow, N.S. and Pavlis, T.L., Fold-fault relationships in low-angle detachment systems, Tectonics, 13, 668-685, 1994.

From: Tectonics & structural geology discussion list [mailto:[log in to unmask]] On Behalf Of Magee, Craig
Sent: Monday, January 16, 2012 6:13 AM
To: [log in to unmask]
Subject: intrusions into normal faults

Hi everyone,

Apologies to those to whom this e-mail doesn’t apply, but I was wondering if anyone could point me in the direction of good field locations or papers where igneous intrusions exploiting pre-existing normal faults can be seen. Literature seems a bit sparse on this, particularly in terms of field outcrops.

Any suggestions are welcome.

Many thanks,

Craig Magee

Post-doctorate Research Associate,

Room 440/26

Petroleum Geoscience and Engineering Research Group,

Department of Earth Science & Engineering,

Imperial College,

LONDON,

SW7 2BP,

Phone: +44 (0)20 7594 9983