Research Activities

 

The ACCRETE project

Some Recent Publications:

1995           

The geological framework of the ACCRETE seismic transect. M. L. Crawford and the ACCRETE science team, EOS, Transactions American Geophysical Union, 76, F594.

1998

Structural History of the crustal-scale Coast shear zone north of Portland Canal, southeast Alaska and British Columbia. Klepeis, K.A., Crawford, M.L. and Gehrels, G.E. Journal of Structural Geology, v. 20, p. 883-904

1999

Batholith emplacement at mid-crustal levels and its exhumation within an obliquely convergent margin. Crawford, M.L., Klepeis, K.A., Gehrels , G.E. and Isachsen , C., Tectonophysics, v. 312, p. 57-78.

High-temperature arc-parallel normal faulting and transtension at the roots of an obliquely convergent orogen. Keith A. Klepeis and Maria Luisa Crawford, 1999, Geology, v. 27, p. 7-10

Early Miocene or younger normal faults and other Tertiary structures in west Nass River map area, northwest British Columbia, and adjacent parts of Alaska. Evenchick, D.A., Crawford, M.L., McNicoll, V.J., Currie, L.D. and O’Sullivan, P.B. Current Research 1999-A; Geological Survey of Canada, p. 1-11.

Precambrian and Lower Paleozoic -- Selected metamorphic and igneous rocks of the Piedmont Upland, Crawford, M.L., Crawford, W.A., Hoersch, A.L. and Wagner, M.E., in: Shultz, C., ed. The Geology of Pennsylvania. Geological Survey of Pennsylvania and Pittsburgh Geological Society, Geological Survey of Pennsylvania Special Publication 1, Chapter 3a, p. 26-35.

Piedmont Upland, Crawford, M.L., Crawford, W.A., Hoersch, A.L. and Wagner, M.E., in: Shultz, C., ed. The Geology of Pennsylvania. Geological Survey of Pennsylvania and Pittsburgh Geological Society, Geological Survey of Pennsylvania Special Publication 1, Chapter 16, p. 234-241.

Precambrian, Crawford, M.L., Crawford, W.A., Hoersch, A.L. and Wagner, M.E., in: Shultz, C., ed. The Geology of Pennsylvania. Geological Survey of Pennsylvania and Pittsburgh Geological Society, Geological Survey of Pennsylvania Special Publication 1, Chapter 32, p. 414-417.

Distribution of overprinting metamorphic mineral assemblages in the Wissahickon group, southeastern Pennsylvania. Bosbyshell, H, Crawford, M.L. and Srogi, L. In Valentino, D.W. and Gates, A.E., eds., The Mid-Atlantic Piedmont: Tectonic Missing Link of the Appalachians. Geological Society of America Special Paper 330, p. 41-57.

2000           

Terrane assembly and structural relationships in the eastern Prince Rupert Quadrangle, British Columbia. Crawford, M.L., Crawford, W.A.and Gehrels, G.E., In: Stowell, H.H. and McClelland, W.C. eds., Tectonics of the Coast Mountains, Southeastern Alaska and British Columbia. Geological Society of America Special Paper 343, p. 1-21.

Metamorphic history of the Coast Mountains orogen, western British Columbia and southeastern Alaska., Stowell, H.H. and Crawford, M.L., In: Stowell, H.H. and McClelland, W.C. eds., Tectonics of the Coast Mountains, Southeastern Alaska and British Columbia. Geological Society of America Special Paper 343, p. 257-283.

Post-accretion magmatism within the Kuiu-Etolin igneous belt, southeastern Alaska, Lindline, J., Crawford, W.A., Crawford, M.L. and Omar, G.I., Canadian Mineralogist, v. 38, p. 951-974.

2001           

Paleomagnetism of the Quottoon plutonic complex in the Coast Mountains of British Columbia and southeastern Alaska: Evidence for tilting during uplift. Butler, R.F., Gehrels, G.E., Crawford, M.L. and Crawford, W.A., Canadian Journal of Earth Sciences, v. 38, p. 1367-1384

2004

A bimodal volcanic–plutonic system: the Zarembo Island extrusive suite and the Burnett Inlet intrusive complex.  Lindline, Jennifer, Crawford, W.A. and Crawford, M.L.,  Canadian Journal of Earth Sciences, v. 41, p. 355-375.

Neogene tilting of crustal panels near Wrangell, Alaska. Butzer, C., Butler, R.F., Gehrels, G.E., Davidson, S., O’Connell, K., Crawford, M.L.  Geology, v. 32, 1061-1064.

2005

Using incongruent, equilibrium hydration reactions to model latter-stage crystallization in plutons: examples from the Bell Island tonalite, Alaska. Beard, J.S., Ragland, P.C., and Crawford, M.L.  Journal of Geology, v. 113, 589-599.

Reactive bulk assimilation: A model for crust-mantle mixing in silicic magmas. Beard, J.S., Ragland, P.C., and Crawford, M.L.  Geology: v. 33, 681–684.

105 million years of igneous activity, Wrangell, Alaska, to Prince Rupert, British Columbia. Crawford, M.L., Crawford, W.A. and Lindline, J.  Canadian Journal of Earth Sciences, v. 42, p. 1097-1116.

Recent Abstracts:

1998           

Arc construction during high-temperature transpression and orogen parallel extension. M.L. Crawford, Dept. of Geology, Bryn Mawr College, Bryn Mawr, PA 19010 and K.A. Klepeis, Dept. of Geology and Geophysics, University of Sydney, Sydney, NSW 2006, Australia.

High temperature orogen parallel extension during arc construction and exhumation.  M.L. Crawford, Dept. of Geology, Bryn Mawr College, Bryn Mawr, PA 19010 and K.A. Klepeis, Dept. of Geology and Geophysics, University of Sydney, Sydney, NSW 2006, Australia

Early Miocene or Younger Normal Faults and the ACCRETE Seismic Survey, Northwest Canadian Cordillera. Evenchick, C A, Geological Survey of Canada, 101-605 Robson Street Vancouver, BC V6B 5J3 Canada; Crawford, M, Bryn Mawr College Bryn Mawr, PA 19010 United States; McNicoll, V J, Geological Survey of Canada 601 Booth Street Ottawa, ON K1A 0E8 Canada.

1999           

Chronology in the central Appalachian Piedmont – A tie to the Paleozoic clastic sedimentary record. Crawford, M.L., Bosbyshell, H. and Sinha, A.K., Geol. Soc. Am. Abs. with Programs 31, #1, p. A-11.

Electron microprobe age  mapping and dating of monazite: New insights on the timing of polyphase Paleozoic metamorphism in the central Appalachians. Bosbyshell, H., Williams, M.L., Jercinovic, M.J. and Crawford, M.L. Geol. Soc. Am. Abs. with Programs 31, #7, p. A-39.

Petrogenesis of mafic magmatic enclaves in tertiary granitoids, SE Alaska: Crystal fractionation and equilibration processes. Lindline, J., Crawford, W.A. and Crawford, M.L., Geol. Soc. Am. Abs. with Programs 31, p. A-30.

Migmatization in the central gneiss complex, coastal northwestern British Columbia and southeastern Alaska, Sokol, N.K. and Crawford, M.L., in Cook, F. and Erdmer, P. eds. 1999 Slave-Northern Cordilleran Lithospheric Evolution (SNORCLE) Transect and Cordilleran Tectonics Workshop Meeting, Lithoprobe Report No. 69, p. 169-170

2000

Magmatic record of the Eocene shift from convergence to translation in the central Coast Mountains, BC and SE AK. Lindline, J, Mora-Klepeis, G., Crawford, M.L. and Crawford, W.A., Geological Society of America Abstracts with Programs v. 32, #6, p. A-24.

Geochemistry, petrogenesis, and tectonic significance of amphibolites in the Wilmington Complex and Wissahickon Formation, Central Appalachian Piedmont, Delaware Co., PA. Bosbyshell, H., Srogi, L.A., and Crawford, M.L. Geol. Soc. Am. Abs. with Programs 32, #1, p. A-6.

Geochemistry and tectonic implications of early Paleozoic boninitic and arc-related magmatism in the Wissahickon Formation and Wilmington Complex, Central Appalachian Piedmont. Bosbyshell, H., Srogi, L.A., and Crawford, M.L., Geol. Soc. Am. Abs. with Programs 32, #7, p. A-216.

A bimodal volcanic-plutonic system: the Zarembo Island extrusive suite and the Deer-Etolin Island intrusive complex. Lindline, J., Crawford, W.A. and Crawford, M.L., Geol. Soc. Am. Abs. with Programs 32, #7, p. A-147.

2001

Electron microprobe age mapping and dating of monazite: deconvoluting polyphase Paleozoic tectonism in the Central Appalachians. Bosbyshell, H., Crawford, M.L. and Williams, M.L.,  Geol. Soc. Am. Abs. with Programs 33, #1, p. A-82.

Tectonic synthesis of recent geochronological and geochemical data in the central Appalachian Piedmont of SE PA and N Del.  Bosbyshell, H., Srogi, L., Aleinikoff, J., Plank, M.O., Schenck, W.S., Crawford, M.L. and Williams, M.L., Geol. Soc. Am. Abs. with Programs 33, #7, p.

Crawford, M.L. Integrating CARIS GIS into a geological field research program – CARIS users group conference - INVITED PAPER.

2002

Syntectonic tonalite magma emplacement during crustal thickening – the Bell Island Pluton, SE Alaska. Crawford, M.L., Lindline, J., Crawford, W.A., and Sinha, A.K. Geol. Soc. Am. Abs. with Programs 34, #7, p. 44.

Mineral zoning in the Bell Island pluton, SE Alaska, with implications for the behavior of REE in igneous rocks. Beard, J., Sinha, A.K., and Crawford, M.L. Geol. Soc. Am. Abs. with Programs 34, #7, p. 269.

Textural and Compositional Distinctions between Mid-Cretaceous tonalites of the Southeastern Petersburg Quadrangle, Alaska. Krembs, F. J., Lindline, J., Bosbyshell, H., and Crawford, M. L., Geol. Soc. Am. Abs. with Programs 34, #1, p.

Petrogenesis of tonalites based on 3-D architecture of Bell Island pluton, SE Alaska. Sinha, A.K., Crawford, M.L., and Beard, J. Geol. Soc. Am. Abs. with Programs 34, #7, p. 44.

2004

Hydrous Arc Magmatism Associated with Accretion, the Central Coast Mountains Orogen of Southeastern Alaska and Northern Coastal British Columbia, Crawford, M.L., Crawford, W.A., and Beard, J.S. Geol. Soc. Am. Abs. with Programs 36, #5, p. 343.

Bulk Assimilation, Reactive Crystallization and the Cryptic Nature of Crust-Mantle Mixing in Plutons: A Conceptual Model, Beard, J.S., Ragland, P.C., and Crawford, M. L., Geol. Soc. Am. Abs. with Programs 36, #5, 343.

2005

Crustal Evolution during the last 105 Million years, Central Coast Orogen, BC and Southeastern Alaska. Crawford, M.L. Geol. Soc. Am. Abs. with Programs 37, #4, p. 51.

Mid-crustal transtension and its relationship to arc magmatism and rheological heterogeneity in an ancient orogen. Klepeis, K.A., Crawford, M.L. and Gehrels, G.E. Geol. Soc. Am. Abs. with Programs 37, #7, p. 422.

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