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Table of Contents - Special Paper 431

Tectonic Growth of a Collisional Continental Margin: Crustal Evolution of Southern Alaska

edited by Kenneth D. Ridgway, Jeffrey M. Trop, Jonathan M.G. Glen, and J. Michael O’Neill

Preface

Regional Crustal Structure and Geologic Framework Studies
1. The geophysical character of southern Alaska—Implications for crustal evolution
R.W. Saltus, T.L. Hudson, and F.H. Wilson		 1
2. Crustal structure of Wrangellia and adjacent terranes inferred from geophysical studies along a transect through the northern Talkeetna Mountains
J.M.G. Glen, J. Schmidt, L. Pellerin, D.K. McPhee, and J.M. O’Neill		 21
3. Crustal structure of the Alaska Range orogen and Denali fault along the Richardson Highway
M.A. Fisher, L. Pellerin, W.J. Nokleberg, N.A. Ratchkovski, and J.M.G. Glen		 43
4. Mesozoic and Cenozoic tectonic growth of southern Alaska: A sedimentary basin perspective
J.M. Trop and K.D. Ridgway		 55
5. The Border Ranges fault system, southern Alaska
T.L. Pavlis and S.M. Roeske		 95
6. Origin of narrow terranes and adjacent major terranes occurring along the Denali fault in the Eastern and Central Alaska Range, Alaska
W.J. Nokleberg and D.H. Richter		 129
7. Detrital zircon geochronology of some Neoproterozoic to Triassic rocks in interior Alaska
D.C. Bradley, W.C. McClelland, J.L. Wooden, A.B. Till, S.M. Roeske, M.L. Miller, S.M. Karl, and J.G. Abbott		 155

Mesozoic Magmatism, Deformation, and Basin Development
8. Upper Triassic continental margin strata of the central Alaska Range: Implications for paleogeographic reconstruction
A.B. Till, A.G. Harris, B.R. Wardlaw, and M. Mullen		 191
9. Structure, Cr-chemistry, and age of the Border Ranges Ultramafic-Mafic Complex: A suprasubduction zone ophiolite complex
T.M. Kusky, A. Glass, and R. Tucker		 207
10. The Tlikakila complex in southern Alaska: A suprasubduction-zone ophiolite between the Wrangellia Composite terrane and North America
J.M. Amato, M.J. Bogar, G.E. Gehrels, G.L. Farmer, and W.C. McIntosh		 227
11. U-Pb geochronology of volcanic rocks from the Jurassic Talkeetna Formation and detrital zircons from prearc and postarc sequences: Implications for the age of magmatism and inheritance in the Talkeetna arc
J.M. Amato, M.E. Rioux, P.B. Kelemen, G.E. Gehrels, P.D. Clift, T.L. Pavlis, and A.E. Draut		 253
12. The restricted Gemuk Group: A Triassic to Lower Cretaceous succession in southwestern Alaska
M.L. Miller, D.C. Bradley, T.K. Bundtzen, R.B. Blodgett, E.A. Pessagno, Jr., R.D. Tucker, and A.G. Harris		 273
13. Stratigraphy, depositional systems, and provenance of the Lower Cretaceous Kahiltna assemblage, western Alaska Range: Basin development in response to oblique collision
J.L. Kalbas, K.D. Ridgway, and G.E. Gehrels		 307
14. Sedimentary record of the tectonic growth of a collisional continental margin: Upper Jurassic–Lower Cretaceous Nutzotin Mountains sequence, eastern Alaska Range, Alaska
J.D. Manuszak, K.D. Ridgway, J.M. Trop, and G.E. Gehrels		 345
15. The White Mountain Granitoid Suite: Isotopic constraints on source reservoirs for Cretaceous magmatism within the Wrangellia Terrane
D.C. Snyder and W.K. Hart		 379
16. Pre-, syn-, and postcollisional stratigraphic framework and provenance of Upper Triassic–Upper Cretaceous strata in the northwestern Talkeetna Mountains, Alaska
B.A. Hampton, K.D. Ridgway, J.M. O’Neill, G.E. Gehrels, J. Schmidt, and R.B. Blodgett		 401
17. Along strike variations in metamorphism and deformation of the strata of the Kahiltna basin, south-central Alaska
C. Davidson and D. McPhillips		 439

Cenozoic Magmatism, Deformation, and Basin Development
18. 40Ar/39Ar and U-Pb geochronology, geochemistry, and tectonic setting of three episodes of Cretaceous-Eocene calc-alkaline magmatism in the Lake Clark Region, southwestern Alaska
J.M. Amato, C. Foley, M. Heizler, and R. Esser		 455
19. Magmatism and deformation in a terrane suture zone south of the Denali fault, northern Talkeetna Mountains, Alaska
R.B. Cole, P.W. Layer, B. Hooks, A. Cyr, and J. Turner		 477
20. Neogene transpressional foreland basin development on the north side of the central Alaska Range, Usibelli Group and Nenana Gravel, Tanana basin
K.D. Ridgway, E.E. Thoms, P.W. Layer, M.E. Lesh, J.M. White, and S.V. Smith		 507
21. Neotectonic framework of the north-central Alaska Range foothills
S.P. Bemis and W.K. Wallace		 549
22. Geomorphic evidence of active transpressional deformation in the Tanana foreland basin, south-central Alaska
M.E. Lesh and K.D. Ridgway		 573

Tectonic Configuration of Southern Alaska—Bearings on Mineral Exploration
23. Gravity and magnetic character of south-central Alaska: Constraints on geologic and tectonic interpretations, and implications for mineral exploration
J.M.G. Glen, J. Schmidt, and R. Morin		 593
24. Metallogeny of the Nikolai large igneous province (LIP) in southern Alaska and its influence on the mineral potential of the Talkeetna Mountains
J.M. Schmidt and R.K. Rogers		 623

Index