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Volume 46, Number 4
1 April 2018
Issue Cover
ISSN: 0091-7613
EISSN: 1943-2682
In this Issue

Articles

Overwriting of sedimentary magnetism by bacterially mediated mineral alteration
Yael Ebert; Ron Shaar; Simon Emmanuel; Norbert Nowaczyk; Mordechai Stein
View articletitled, Overwriting of sedimentary magnetism by bacterially mediated mineral alteration
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3.2 Ga detrital uraninite in the Witwatersrand Basin, South Africa: Evidence of a reducing Archean atmosphere
Ian Burron; Giuliana da Costa; Ryan Sharpe; Mostafa Fayek; Christoph Gauert; Axel Hofmann
View articletitled, 3.2 Ga detrital uraninite in the Witwatersrand Basin, South Africa: Evidence of a reducing Archean atmosphere
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Connections between subducted sediment, pore-fluid pressure, and earthquake behavior along the Alaska megathrust
Jiyao Li; Donna J. Shillington; Demian M. Saffer; Anne Bécel; Mladen R. Nedimović; Harold Kuehn; Spahr C. Webb; Katie M. Keranen; Geoffrey A. Abers
View articletitled, Connections between subducted sediment, pore-fluid pressure, and earthquake behavior along the Alaska megathrust
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A 4463 Ma apparent zircon age from the Jack Hills (Western Australia) resulting from ancient Pb mobilization
Rongfeng Ge; Simon A. Wilde; Alexander A. Nemchin; Martin J. Whitehouse; Jeremy J. Bellucci; Timmons M. Erickson; Adam Frew; Eric R. Thern
View articletitled, A 4463 Ma apparent zircon age from the Jack Hills (Western Australia) resulting from ancient Pb mobilization
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Cordilleran ice-sheet growth fueled primary productivity in the Gulf of Alaska, northeast Pacific Ocean
Juliane Müller; Oscar Romero; Ellen A. Cowan; Erin L. McClymont; Matthias Forwick; Hirofumi Asahi; Christian März; Christopher M. Moy; Itsuki Suto; Alan Mix; Joseph Stoner
View articletitled, Cordilleran ice-sheet growth fueled primary productivity in the Gulf of Alaska, northeast Pacific Ocean
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Geomorphic stasis and spatiotemporal scales of stratigraphic completeness
Kyle M. Straub; Brady Z. Foreman
View articletitled, Geomorphic stasis and spatiotemporal scales of stratigraphic completeness
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Protracted heating of the orogenic crust in Death Valley, California, USA
Rodrigo D. Lima; Michael G. Prior; Daniel F. Stockli; Nicholas W. Hayman
View articletitled, Protracted heating of the orogenic crust in Death Valley, California, USA
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Appalachian-style multi-terrane Wilson cycle model for the assembly of South China
Shoufa Lin; Guangfu Xing; Donald W. Davis; Changqing Yin; Meiling Wu; Longming Li; Yang Jiang; Zhihong Chen
View articletitled, Appalachian-style multi-terrane Wilson cycle model for the assembly of South China
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Genesis of the world’s largest rare earth element deposit, Bayan Obo, China: Protracted mineralization evolution over ∼1 b.y.
Wenlei Song; Cheng Xu; Martin P. Smith; Anton R. Chakhmouradian; Marco Brenna; Jindřich Kynický; Wei Chen; Yueheng Yang; Miao Deng; Haiyan Tang
View articletitled, Genesis of the world’s largest rare earth element deposit, Bayan Obo, China: Protracted mineralization evolution over ∼1 b.y.
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Congruent Permian-Triassic δ238U records at Panthalassic and Tethyan sites: Confirmation of global-oceanic anoxia and validation of the U-isotope paleoredox proxy
Feifei Zhang; Thomas J. Algeo; Stephen J. Romaniello; Ying Cui; Laishi Zhao; Zhong-Qiang Chen; Ariel D. Anbar
View articletitled, Congruent Permian-Triassic δ<sup>238</sup>U records at Panthalassic and Tethyan sites: Confirmation of global-oceanic anoxia and validation of the U-isotope paleoredox proxy
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Diatom ooze: Crucial for the generation of submarine mega-slides?
Morelia Urlaub; Jacob Geersen; Sebastian Krastel; Tilmann Schwenk
View articletitled, Diatom ooze: Crucial for the generation of submarine mega-slides?
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Conservation of deep crustal heat production
Kiara L. Alessio; Martin Hand; David E. Kelsey; Megan A. Williams; Laura J. Morrissey; Karin Barovich
View articletitled, Conservation of deep crustal heat production
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Stromatolites below the photic zone in the northern Arabian Sea formed by calcifying chemotrophic microbial mats
Tobias Himmler; Daniel Smrzka; Jennifer Zwicker; Sabine Kasten; Russell S. Shapiro; Gerhard Bohrmann; Jörn Peckmann
View articletitled, Stromatolites below the photic zone in the northern Arabian Sea formed by calcifying chemotrophic microbial mats
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Generation of alkaline magmas in subduction zones by partial melting of mélange diapirs—An experimental study
Alicia M. Cruz-Uribe; Horst R. Marschall; Glenn A. Gaetani; Véronique Le Roux
View articletitled, Generation of alkaline magmas in subduction zones by partial melting of mélange diapirs—An experimental study
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A mineralogical signature for Burgess Shale–type fossilization
Ross P. Anderson; Nicholas J. Tosca; Robert R. Gaines; Nicolás Mongiardino Koch; Derek E.G. Briggs
View articletitled, A mineralogical signature for Burgess Shale–type fossilization
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Polar desert chronologies through quantitative measurements of salt accumulation
Joseph A. Graly; Kathy J. Licht; Gregory K. Druschel; Michael R. Kaplan
View articletitled, Polar desert chronologies through quantitative measurements of salt accumulation
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Warm and cold wet states in the western United States during the Pliocene–Pleistocene
Daniel E. Ibarra; Jessica L. Oster; Matthew J. Winnick; Jeremy K. Caves Rugenstein; Michael P. Byrne; C. Page Chamberlain
View articletitled, Warm and cold wet states in the western United States during the Pliocene–Pleistocene
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Characterization of kerogenous films and taphonomic modes of the Sirius Passet Lagerstätte, Greenland
Timothy P. Topper; Francesco Greco; Axel Hofmann; Andrew Beeby; David A.T. Harper
View articletitled, Characterization of kerogenous films and taphonomic modes of the Sirius Passet Lagerstätte, Greenland
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Centennial-scale trends in the Southern Annular Mode revealed by hemisphere-wide fire and hydroclimatic trends over the past 2400 years
Michael-Shawn Fletcher; Alexa Benson; David M.J.S. Bowman; Patricia S. Gadd; Hendrik Heijnis; Michela Mariani; Krystyna M. Saunders; Brent B. Wolfe; Atun Zawadzki
View articletitled, Centennial-scale trends in the Southern Annular Mode revealed by hemisphere-wide fire and hydroclimatic trends over the past 2400 years
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Seamount chain–subduction zone interactions: Implications for accretionary and erosive subduction zone behavior
Alexander P. Clarke; Paola Vannucchi; Jason Morgan
View articletitled, Seamount chain–subduction zone interactions: Implications for accretionary and erosive subduction zone behavior
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Breakdown of residual zircon in the Izu arc subducting slab during backarc rifting
Yasuhiro Hirai; Takanori Yoshida; Satoshi Okamura; Yoshihiko Tamura; Izumi Sakamoto; Ryuichi Shinjo
View articletitled, Breakdown of residual zircon in the Izu arc subducting slab during backarc rifting
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Intracrystalline deformation of calcite in the upper brittle crust
H. Bauer; A. Rogowitz; B. Grasemann; K. Decker
View articletitled, Intracrystalline deformation of calcite in the upper brittle crust
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Unique occurrence of a folded in-vent dike: New insights on magma-water mixing
Jozua van Otterloo; Michael H. Ort; Alexander R. Cruden
View articletitled, Unique occurrence of a folded in-vent dike: New insights on magma-water mixing
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RESEARCH FOCUS

New insights on sediment magnetic remanence acquisition point out complexity of magnetic mineral diagenesis
Leonardo Sagnotti
View articletitled, New insights on sediment magnetic remanence acquisition point out complexity of magnetic mineral diagenesis
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Forum

The Sabine block, Gulf of Mexico: Promontory on the North American margin?: COMMENT
Harm J.A. Van Avendonk; Ian W.D. Dalziel
View articletitled, The Sabine block, Gulf of Mexico: Promontory on the North American margin?: COMMENT
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The Sabine block, Gulf of Mexico: Promontory on the North American margin?: REPLY
Peter D. Clift; Paul Heinrich; Dennis Dunn; Andrew Jacobus; Jerzy Blusztajn
View articletitled, The Sabine block, Gulf of Mexico: Promontory on the North American margin?: REPLY
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  • Cover Image

    Cover Image

    issue cover

    COVER: An exceptionally well-preserved orthopyroxene megacryst containing garnet lamellae, juxtaposed against granular harzburgite, from the Bultfontein pans, Kaapvaal craton. Garnet lamellae are homogeneously distributed within the host orthopyroxene and occur at an orientation that is unrelated to orthopyroxene cleavage, strongly indicating that they formed by exsolution. See “An exsolution origin for Archean mantle garnet” by Tomlinson et al., p. 123–126 in the February 2018 issue of Geology.

    Image by: Mags Duncan

    Cover design by: Heather L. Sutphin

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