Faculty Works, Department of Geosciences

Can NanoSIMS probe quantitatively the geochemical composition of ancient organic-walled microfossils? A case study from the early Neoproterozoic Liulaobei Formation

Delarue, Frederic; Robert, Francois; Tartese, Romain; Sugitani, Kenichiro; Tang, Qing; Duhamel, Remi; Pont, Sylvain; Xiao, Shuhai (2018-07)

Assessing the biogenicity of Precambrian putative remnants of life requires solid criteria. Among possible criteria, searching for evidence of pristine biological signatures and identifying various biological organic matter ...

How Precisely Can the Temperature of a Fluid Event be Constrained Using Fluid Inclusions?

Fall, Andras; Bodnar, Robert J. (2018-12)

Fluid inclusions in clearly defined fluid inclusion assemblages (FIAs) from various geologic environments were examined to assess the uncertainty associated with determining the temperature of a fluid event based on fluid ...

A Geodetic Strain Rate and Tectonic Velocity Model for China

Rui, X.; Stamps, D. Sarah (2019-03)

The conjoining and interfering influence of the Circum-Pacific zone and the Tethys-Himalayan zone make China a country of intense intracontinental seismicity. Here we provide three new quantitatively assessed products and ...

Application of the Linkam TS1400XY heating stage to melt inclusion studies

Esposito, Rosario; Klébesz, Rita; Bartoli, Omar; Klyukin, Yury I.; Moncada, Daniel; Doherty, Angela L.; Bodnar, Robert J. (De Gruyter, 2012-05-13)

Melt inclusions (MI) trapped in igneous phenocrysts provide one of the best tools available for characterizing magmatic processes. Some MI experience post-entrapment modifications, including crystallization of material on ...

Composition and origin of nodules from the ≈20 ka Pomici di Base (PB)-Sarno eruption of Mt. Somma – Vesuvius, Italy

Klébesz, Rita; Bodnar, Robert J.; De Vivo, Benedetto; Török, Kálmán; Lima, Annamaria; Petrosino, Paola (De Gruyter, 2012-05-13)

Nodules (coarse-grain “plutonic” rocks) were collected from the ca. 20 ka Pomici di Base (PB)-Sarno eruption of Mt. Somma-Vesuvius, Italy. The nodules are classified as monzonite-monzogabbro based on their modal composition. ...

Gangue mineral textures and fluid inclusion characteristics of the Santa Margarita Vein in the Guanajuato Mining District, Mexico

Moncada, Daniel; Bodnar, Robert J. (De Gruyter, 2012-05-13)

Successful exploration for mineral deposits requires tools that the explorationist can use to distinguish between targets with high potential for mineralization and those with lower economic potential. In this study, we ...

Quartz precipitation and fluid inclusion characteristics in sub-seafloor hydrothermal systems associated with volcanogenic massive sulfide deposits

Steele-MacInnis, Matthew; Han, Liang; Lowell, Robert P.; Rimstidt, J. Donald; Bodnar, Robert J. (De Gruyter, 2012-05-13)

Results of a numerical modeling study of quartz dissolution and precipitation in a sub-seafloor hydrothermal system have been used to predict where in the system quartz could be deposited and potentially trap fluid inclusions. ...

Detrital zircons reveal sea-level and hydroclimate controls on Amazon River to deep-sea fan sediment transfer

Mason, Cody C.; Romans, Brian W.; Stockli, Daniel F.; Mapes, Russel W.; Fildani, Andrea (2019-06)

We use new U-Pb detrital zircon (DZ) geochronology from the Pleistocene Amazon submarine fan (n = 1352 grains), integrated with onshore DZ age data, to propose a sedimentary model for sea level-modulated and hydroclimate-modulated ...

Natural, incidental, and engineered nanomaterials and their impacts on the Earth system

Hochella, Michael F., Jr.; Mogk, David W.; Ranville, James; Allen, Irving C.; Luther, George W.; Marr, Linsey C.; McGrail, B. Peter; Murayama, Mitsu; Qafoku, Nikolla P.; Rosso, Kevin M.; Sahai, Nita; Schroeder, Paul A.; Vikesland, Peter; Westerhoff, Paul; Yang, Yi (2019-03-29)

Nanomaterials are critical components in the Earth system's past, present, and future characteristics and behavior. They have been present since Earth's origin in great abundance. Life, from the earliest cells to modern ...

The axial skeleton of Poposaurus langstoni (Pseudosuchia: Poposauroidea) and its implications for accessory intervertebral articulation evolution in pseudosuchian archosaurs

Stefanic, Candice M.; Nesbitt, Sterling J. (PeerJ, 2018-02-14)

Dinosaurs and their close relatives grew to sizes larger than any other terrestrial animal in the history of life on Earth, and many enormous dinosaurs (e.g., Diplodocus, Spinosaurus, Tyrannosaurus) have accessory ...

Under the armor: X-ray computed tomographic reconstruction of the internal skeleton of Coahomasuchus chathamensis (Archosauria: Aetosauria) from the Upper Triassic of North Carolina, USA, and a phylogenetic analysis of Aetosauria

Hoffman, Devin K.; Heckert, Andrew B.; Zanno, Lindsay E. (PeerJ, 2018-02-13)

Aetosauria is a clade of heavily armored, quadrupedal omnivorous to herbivorous archosaurs known from the Late Triassic across what was the supercontinent of Pangea. Their abundance in many deposits relative to the paucity ...

Integrating gross morphology and bone histology to assess skeletal maturity in early dinosauromorphs: new insights from Dromomeron (Archosauria: Dinosauromorpha)

Griffin, Christopher T.; Bano, Lauren S.; Turner, Alan H.; Smith, Nathan D.; Irmis, Randall B.; Nesbitt, Sterling J. (PeerJ, 2019-02-11)

Understanding growth patterns is central to properly interpreting paleobiological signals in tetrapods, but assessing skeletal maturity in some extinct Glades may be difficult when growth patterns are poorly constrained ...

Links between physical and chemical weathering inferred from a 65-m-deep borehole through Earth's critical zone

Holbrook, W. Steven; Marcon, Virginia; Bacon, Allan R.; Brantley, Susan L.; Carr, Bradley J.; Flinchum, Brady A.; Richter, Daniel D.; Riebe, Clifford S. (Springer Nature, 2019-03-14)

As bedrock weathers to regolith -defined here as weathered rock, saprolite, and soil - porosity grows, guides fluid flow, and liberates nutrients from minerals. Though vital to terrestrial life, the processes that transform ...

High density oilfield wastewater disposal causes deeper, stronger, and more persistent earthquakes

Pollyea, Ryan M.; Chapman, Martin C.; Jayne, Richard S.; Wu, Hao (Nature, 2019)

Oilfield wastewater disposal causes fluid pressure transients that induce earthquakes. Here we show that, in addition to pressure transients related to pumping, there are pressure transients caused by density differences ...

The formation of spinel-group minerals in contaminated soils: the sequestration of metal(loid)s by unexpected incidental nanoparticles

Schindler, Michael; Mantha, Haley; Hochella, Michael F. Jr. (2019-03-13)

Abstract Mineralogical studies of contaminated soils affected by smelter emission and dust from mining activities indicate that minerals of the spinel group are one of the common hosts of metal-bearing ...