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American Journal of Science

Founded in 1818 by Benjamin Silliman. The Journal is devoted to geology and related sciences. www.ajsonline.org
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https://ajs.manuscriptmanager.net/ The American Journal of Science (AJS), founded in 1818 by Benjamin Silliman, is the oldest scientific journal in the United States that has been published continuously. The Journal is devoted to geology and related sciences and publishes articles from around the world presenting results of major research from all earth sciences. Readers are primarily earth scient

ists in academia and government institutions. The American Journal of Science considers contributions from any field within the Earth Sciences, however the papers are expected to be of interest to a broad cross section of the scientific community. Consequently, manuscripts more appropriate for regional or specialty journals are often returned to authors without external review. AJS would like to increase its visibility in the broad field of Earth System History that would address the following three broad areas:
1. The coupling of the solid earth, ocean and atmospheric systems through time
2. The relationships and feedbacks between tectonics and climate
3. Deep time coupling of biology to the chemical evolution of Earth
AJS strives to publish papers with maximum impact in their fields. There are no limits on the minimum or maximum sizes of submitted manuscripts.

06/20/2024

New Paper: Controls on the Termination of Cretaceous Oceanic Anoxic Event 2 in the Tarfaya Basin, Morocco by Chiara Krewer, Simon W. Poulton, Robert J. Newton, Christian März, Benjamin J. W. Mills, and Thomas Wagner
Am J Sci 2024; 324:11 https://doi.org/10.2475/001c.118797
https://ajsonline.org/article/118797
"The recovery from OAE2 in the Tarfaya Basin was driven by decreasing chemical weathering, less intensely reducing conditions and pulses of phosphorous drawdown."

06/12/2024

New Paper: The Rare Earth Element Distribution in Marine Carbonates as a Potential Proxy for Seawater pH on Early Earth by Ping-Chun Lin and David C. Catling
Am J Sci 2024; 324:10 https://doi.org/10.2475/001c.118215
https://ajsonline.org/article/118215
"To better understand early Earth's environment, we use rare earth element distributions in marine carbonates to infer Precambrian seawater pH, where pH trends compare favorably with boron isotope pH estimates."

05/24/2024

New Paper: Late Cretaceous Uplift of Grand Canyon: Evidence From Fluid Inclusions by Laura L. Barnett, Peter Copeland, Virginia B. Sisson, and Steve Naruk
Am J Sci 2024; 324:9 https://doi.org/10.2475/001c.116737
https://ajsonline.org/article/116737
"Fluid inclusion entrapment temperatures and burial histories from Grand Canyon suggest major denudation of late Cretaceous strata occurred from 89-58 Ma, consistent with early stages of Grand Canyon Formation."

04/26/2024

New Paper: The Carbon Isotopic Composition of Archean Kerogen and Its Resilience Through the Rock Cycle by Sarah S. Zeichner, Woodward W. Fischer, Noam Lotem, Kelsey R. Moore, Joshua E. Goldford, and John M. Eiler
Am J Sci 2024; 324:8 https://doi.org/10.2475/001c.116058
https://ajsonline.org/article/116058

04/22/2024

New Paper: Thermal Expansion of Metal Oxides in Silicate Melts: A Simple Theoretical Analysis by H. Wayne Nesbitt, Pascal Richet, Grant S. Henderson, and G. Michael Bancroft
Am J Sci 2024; 324:7 https://doi.org/10.2475/001c.115477
https://ajsonline.org/article/115477

04/15/2024

New Paper: Abundant 2480 Ma Detrital Zircons in ∼1740 Ma Vishnu Schist in Northwestern Arizona: Derivation From the Matachewan Large Igneous Province? by Jon E. Spencer, Michael F. Doe, Kenneth J. Domanik
Am J Sci 2024; 324:6 https://doi.org/10.2475/001c.115633
https://ajsonline.org/article/115633

04/05/2024

New Paper: Cenozoic Basin Evolution During Alternating Extension and Shortening in the Southern Central Andes Along the Chile-Argentina Border, 37–38°S by Alfonso Encinas, Eduardo Rosselot, Lucía Sagripanti, Andrés Folguera, Brian K. Horton, Darío Orts, Victor A. Valencia, Gabriel Arriagada, Paz Butikofer, and Andrés Solórzano
Am J Sci 2024; 324:5 https://doi.org/10.2475/001c.115328
https://ajsonline.org/article/115328

03/25/2024

New Paper: Petrogenesis of the Early Paleogene North Island Syenite Complex, Seychelles by J. Gregory Shellnutt, Tung-Yi Lee, Yoshiyuki Iizuka, Hao-Yang Lee, Chi Thi Pham, and Kenshi Suga
Am J Sci 2024; 324:4 https://doi.org/10.2475/001c.94773
https://ajsonline.org/article/94773
"The North Island Syenite complex was derived by fractional crystallization of a mafic alkaline parental magma and is representative of an Early Paleogene closed system magma chamber."

02/26/2024

New Paper: Late Ediacaran to Early Cambrian Breakup Sequences and Establishment of the Eastern Laurentian Passive Margin, Newfoundland, Canada by Maya Soukup, Luke P. Beranek, Stefanie Lode, Dylan Goudie, and David Grant
Am J Sci 2024; 324:3 https://doi.org/10.2475/001c.93038
https://ajsonline.org/article/93038
"The magma-poor, eastern Laurentian margin resulted from polyphase rifting, which culminated with the deposition of Ediacaran to Cambrian breakup sequences that formed in response to crust and mantle rupture events."

02/22/2024

New Paper:Fluid-mineral Equilibrium Under Nonhydrostatic Stress: Insight From Molecular Dynamics by Mattia L. Mazzucchelli, Evangelos Moulas, Boris J. P. Kaus, and Thomas Speck
Am J Sci 2024; 324:2 https://doi.org/10.2475/001c.92881
https://ajsonline.org/article/92881
"The direct effect of nonhydrostatic stress on mineral reactions is evaluated with molecular dynamics simulations of solid-fluid systems, with implications on the use of thermodynamic pressure in geodynamic models."

01/25/2024

New Paper:One Million Years of Climate-Driven Rock Uplift Rate Variation on the Wasatch Fault Revealed by Fluvial Topography by Adam G. G. Smith, Matthew Fox, Jeffrey R. Moore, Scott R. Miller, Liran Goren, Matthew C. Morriss, Andrew Carter
Am J Sci 2024; 324:1 https://doi.org/10.2475/001c.92194
https://ajsonline.org/article/92194
"Rock uplift rate histories derived from fluvial topography reveal that pluvial lakes influenced Wasatch Fault behavior throughout the mid-late Pleistocene, and that bedload/bedrock contrasts predict differences in erodibility."

01/12/2024

New Paper:The World’s Highest-Grade Cobalt Mineralization at Bou Azzer Associated With Gondwana Supercontinent Breakup, Serpentinite and Kellwasser Hydrocarbon Source Rocks by Nicolas J. Saintilan, Moha Ikenne, Stefano M. Bernasconi, Jonathan Toma, Robert A. Creaser, Mustafa Souhassou, Julien M. Allaz, Abdelaq Karfal, Lhou Maacha, Jorge E. Spangenberg

Am J Sci 2023; 323:12 https://doi.org/10.2475/001c.91400
https://ajsonline.org/article/91400

"We combine mineralogy and geochemistry/geochronology to constrain the temporal framework and geodynamic trigger for cobalt arsenide mineralization in the world’s highest-grade cobalt resource associated with Neoproterozoic serpentinite at Bou Azzer."

01/12/2024

New Paper:Resetting of Shallow-Water Carbonate Boron Isotope Values During Marine Burial Diagenesis by Mingyu Zhao, Brian Beaty, Lidya Tarhan, Noah Planavsky
Am J Sci 2023; 323:11 https://doi.org/10.2475/001c.91398
https://ajsonline.org/article/91398

"Our results demonstrate resetting of boron isotopic signatures in bulk carbonates during recrystallization, highlighting the potential utility of boron isotopes as a proxy for carbonate recrystallization or neomorphism."

12/07/2023

New Paper:A Cenozoic Record of Deep Oceanic Zn Isotopic Composition in Ferromanganese Crusts by Mingyu Zhao, Noah Planavsky, Xiangli Wang, Yiyue Zhang, James R. Hein
Am J Sci 2023; 323:10 https://doi.org/10.2475/001c.89628
https://ajsonline.org/article/89628

A reconstruction on the evolution of deep-ocean d66Zn values suggests limited d66Zn shifts and thus limited changes in the extent of organic zinc burial through the Cenozoic.

12/01/2023

New Paper: Insights Into the Terminal Ediacaran Marine Carbonate Record From Shale-Hosted Carbonate Carbon Isotopes by Fred Bowyer, Mariana Yilales, Rachel Wood, Simon W. Poulton
Am J Sci 2023; 323:9 https://doi.org/10.2475/001c.88082
https://ajsonline.org/article/88082

10/26/2023

New Paper: Oxygen Isotopes of Iron Oxides as a Diagnostic Tool for Iron Formation-Hosted High-Grade Magnetite-Hematite Deposits by Flávia Cristina Silveira Braga, Carlos Alberto Rosière, Andreas Pack, Steffen G. Hagemann, João Orestes Schneider Santos
Am J Sci 2023; 323:8 https://doi.org/10.2475/001c.88909
https://ajs.scholasticahq.com/article/88909

Magmatic fluids from pegmatite intrusions have imprinted a distinct oxygen isotope signature in the studied hypogene iron formation hosted high-grade iron deposits.

10/04/2023

New Paper: Chemical Alteration of Riverine Particles in Seawater and Marine Sediments: Effects on Seawater Composition and Atmospheric CO2 by Klaus Wallmann, Sonja Geilert, Florian Scholz
Am J Sci 2023; 323:7 https://doi.org/10.2475/001c.87455
https://ajs.scholasticahq.com/article/87455

This work provides insights into geochemical processes that occur when riverine particles enter the ocean and provides new estimates of global element fluxes that are induced by these processes.

10/04/2023

New Paper: The Influence of Warming on Phosphorus Burial in Continental Margin Sediments by JMingyu Zhao, Lidya Tarhan, Noah Planavsky, Terry Isson
Am J Sci 2023; 323:6 https://doi.org/10.2475/001c.85110 https://ajs.scholasticahq.com/article/85110

Temperature has an important impact on marine phosphorus burial and should therefore be considered when determining how the P cycle has changed or will change in the face of warming.

08/15/2023

New Paper: Isotope Ratio – Discharge Relationships of Solutes Derived From Weathering Reactions by Jennifer L. Druhan and Paolo Benettin
Am J Sci 2023; 323:5 https://doi.org/10.2475/001c.84469
https://ajs.scholasticahq.com/article/84469

A new reactive transport model framework merges chemical weathering, stable isotope fractionation and StorAge Selection functions to produce characteristic concentration - discharge (C-Q) and isotope ratio - discharge (δ-Q) relationships

06/05/2023

New Paper: Integrated Litho-, Chemo- and Sequence Stratigraphy of the Ediacaran Gametrail Formation Across a Shelf-Slope Transect in the Wernecke Mountains, Yukon, Canada
by James F. Busch, Thomas H. Boag, Erik A. Sperling, Alan D. Rooney, Xiahong Feng, David P. Moynihan, Justin V. Strauss
Am J Sci 2023; 323:4 https://doi.org/10.2475/001c.74874
https://ajs.scholasticahq.com/article/74874

06/05/2023

New Paper: The Geometry and Kinematics of the Latest Paleozoic Allatoona Fault, One of the Youngest Thrusts in the Southernmost Appalachian Hinterland, Alabama and Georgia, U.S.A.
by James F. Tull, Christopher S. Holm-Denoma, Nawwaf A. Almuntshry, Ericka L. McMahan
Am J Sci 2023; 323:3 https://doi.org/10.2475/001c.72988
https://ajs.scholasticahq.com/article/72988

06/02/2023

New Paper: Large-strain Elastic and Elasto-Plastic Formulations for Host-Inclusion Systems and Their Applications in Thermobarometry and Geodynamics
by Evangelos Moulas, Yury Podladchikov, Konstantin Zingerman, Anatoly Vershinin, Vladimir Levin
Am J Sci 2023; 323:2 https://doi.org/10.2475/001c.68195
https://ajs.scholasticahq.com/article/68195

06/02/2023

New Paper: Using Homogenized Models to Explore the Effect of Fracture Densities on Weathering
by Marina I. Lebedeva, Susan L. Brantley
Am J Sci 2023; 323:1 https://doi.org/10.2475/001c.68308
https://ajs.scholasticahq.com/article/68308-

06/02/2023

New Paper: Assessing the Long-Term Low-Temperature Thermal Evolution of the Central Indian Bundelkhand Craton With a Complex Apatite and Zircon (U-Th)/He Dataset
by Cody L. Colleps, N. Ryan Mckenzie, Peter Van Der Beek, William R. Guenthner, Mukund Sharma, Adam R. Nordsvan, Daniel F. Stockli
Am J Sci 2022; 322:1089-1123 https://doi.org/10.2475/10.2022.01
https://ajs.scholasticahq.com/article/67946

06/02/2023

New Paper: The PATCH Lab v1.0: A Database and Workspace for Cenozoic Terrestrial Paleoclimate and Environment Reconstruction
by Tyler Kukla, Jeremy K. C. Rugenstein, Elizabeth Driscoll, Daniel E. Ibarra, C. Page Chamberlain
Am J Sci 2022; 322:1124-1158 https://doi.org/10.2475/10.2022.02
https://ajs.scholasticahq.com/article/68058

12/09/2022

New Paper: Structure and thermochronology of basement/cover relations along the Defiance uplift (AZ and NM), and implications regarding Laramide tectonic evolution of the Colorado Plateau
by George H. Davis, Lauren J. Reeher, Gilby Jepson, Barbara Carrapa, Peter G. Decelles and Kayla M. Chaudoir
Am J Sci 2022; 322:1047-1087 doi:10.2475/09.2022.02
https://www.ajsonline.org/content/322/9/1047.abstract

12/09/2022

New Paper: Guadalupian carbon isotope stratigraphy indicates extended interval of carbon cycle stability
by Sakineh Arefifard, Jonathan L. Payne and Malgorzata Rizzi
Am J Sci 2022; 322:1019-1046 doi:10.2475/09.2022.01
https://www.ajsonline.org/content/322/9/1019.abstract

12/09/2022

New Paper: Late Permian plume and Neoproterozoic subduction-modified mantle interaction: Insights from geochronology and Sr-Nd-O isotopes of mafic dikes of the western Emeishan large igneous province by Yanning Wang, Shengchao Xue, Reiner Klemd, Lin Yang, Feng Zhao and Qingfei Wang
Am J Sci 2022; 322:993-1018 doi:10.2475/08.2022.02
https://www.ajsonline.org/content/322/8/993.abstract

12/09/2022

New Paper: The Assabet barcode: Mesoproterozoic detrital zircons in Neoproterozoic strata from Mauritania, West Africa by Dwight C. Bradley, David A. D. Evans, Paul O'Sullivan, Cliff D. Taylor and Bruce M. Eglington
Am J Sci 2022; 322:939-992 doi:10.2475/08.2022.01
https://www.ajsonline.org/content/322/8/939.abstract

09/28/2022

New Paper: Post-depositional transformations in sedimentary rocks and implications for paleoenvironmental studies: evidence from the Mesoproterozoic (∼1.1 Ga) of the Taoudeni Basin, Mauritania by Mohamed Ghnahalla, Abderrazak El Albani, Ahmed Abd Elmola, Olabode M. Bankole, Claude Fontaine, Mohamed Salem Sabar, Alain Trentesaux, Claude Laforest, Alain Meunier, Celine Boissard, Chenyi Tu and Timothy W. Lyons
Am J Sci 2022; 322:898-937 doi:10.2475/07.2022.02
https://www.ajsonline.org/content/322/7/898.abstract

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New paper: "The complex response of continental silicate rock weathering to the colonization of the continents by vascular plants in the Devonian" by Pierre Maffre, Yves Godderis, Alexandre Pohl, Yannick Donnadieu, Sebastien Carretier and Guillaume Le Hir The colonization of the continents by vascular plants in the devonian was previously identified as an accelerator of the CO2 pump by silicate rock weathering. Here we show that, accounting for the geographical context of the colonization, and for the accumulation of weathering products above the bedrock, it is possible that the rise of land plants has modulated the Devonian climate evolution, starting with a warming phase, and followed by a long term global cooling. https://www.ajsonline.org/content/322/3/461.abstract