A5048392082- Geological and Geochemical Analysis
- earthquake and tectonic studies
- Geology and Paleoclimatology Research
- Geochemistry and Geologic Mapping
- High-pressure geophysics and materials
- Geological formations and processes
- Paleontology and Stratigraphy of Fossils
- Geological and Geophysical Studies Worldwide
- Geological and Tectonic Studies in Latin America
- Hydrocarbon exploration and reservoir analysis
- Geological and Geophysical Studies
- Isotope Analysis in Ecology
- Geochemistry and Elemental Analysis
- Pleistocene-Era Hominins and Archaeology
- Geological Studies and Exploration
- Landslides and related hazards
- Mining and Gasification Technologies
- Climate change and permafrost
- Agricultural and Food Sciences
- Marine and environmental studies
- Livestock and Poultry Management
- Liquid Crystal Research Advancements
- Polar Research and Ecology
- Botany and Geology in Latin America and Caribbean
- thermodynamics and calorimetric analyses
The University of Texas at Austin
2016-2024
University of Kansas
2004-2010
Research Article| March 01, 2009 Did the Kohistan-Ladakh island arc collide first with India? Shuhab D. Khan; Khan † 1Department of Earth and Atmospheric Sciences, University Houston, Texas 77204-5007, USA †E-mail: sdkhan@uh.edu Search for other works by this author on: GSW Google Scholar Douglas J. Walker; Walker 2Department Geology, Kansas, Lawrence, Kansas 66045-7613, Stuart A. Hall; Hall 3Department Kevin C. Burke; Burke Mohammad T. Shah; Shah 4National Center Excellence in Peshawar,...
Soil analyses and terrestrial cosmogenic nuclide exposure dating are combined a conceptual model proposed to explain altitudinal weathering contrasts in high-latitude highlands. We show that summits the Torngat Kaumajet mountains were covered by ice during Last Glacial Maximum, their felsenmeer cover probably survived multiple glaciation events. For similar lithologies, soils on signigicantly more weathered than those below limit, displaying higher concentrations of crystalline iron,...
Abstract The juxtaposition of wet‐based erosive ice in valleys and cold‐based, non‐erosive atop felsenmeer‐covered interfluve plateaus has generated relief the Torngat Mountains northeastern Canada. Measurements situ terrestrial cosmogenic nuclide (TCN) concentrations from 31 bedrock sites, coupled with soils geomorphology, indicate that erosion been >2 m during a single glacial–interglacial cycle. However, on summit long‐term (over several cycles) rate is <1·4 Ma −1 . TCN ratios...
During the Holocene, bison ( Bison bison) were key components of Great Plains landscape. This study utilizes serial stable isotope analyses (tooth enamel carbonate) 29 individuals from five middle Holocene (∽ 7–8.5·ka) archaeological sites to address seasonal variability in movement patterns and grazing behavior populations eastern Plains. Stable carbon isotopes δ 13 C) indicate a diet that is similar C3/C4 composition modern tallgrass prairies, while 87 Sr/ 86 Sr values generally very...
Research Article| June 01, 2016 The ancestral Mississippi drainage archived in the late Wisconsin deep-sea fan A. Fildani; Fildani 1Statoil RDI Center, Austin, Texas 78730, USA *Current address: Statoil R&T (Research and Technology), Search for other works by this author on: GSW Google Scholar M.P. McKay; McKay 2Department of Geography, Geology, Planning, Missouri State University, Springfield, 65897, D. Stockli; Stockli 3Department Geological Sciences, University at 1 Station C1100, 78712,...
Abstract The timing and processes of ductile deformation metasomatism can be documented using apatite petrochronology. We integrated microstructural, U-Pb, geochemical analyses grains from an exhumed mylonitic shear zone in the St. Barthélémy Massif, Pyrenees, France, to understand how are recorded by U-Pb dates patterns. Electron backscatter diffraction (EBSD) documents crystal plastic characterized low-angle boundaries (&lt;5°) associated with dislocation creep evidence multiple slip...
The Eaux-Chaudes massif (ECM) of the French Pyrenees consists a nappe stack located in western Axial Zone formed during Alpine times. It features basement-cored recumbent fold with large overturned limb Upper Cretaceous carbonates ductily deformed. Paleotemperatures ~350&#176;C for an autochthonous succession and limb, ~310&#176;C normal were recorded main deformational event, which is equivalent to burial depths 8-10 km. During deformation, syn- post-deformation calcite veins...
Exposed in large, continuous outcrops Provence, southern France, the Castellas fault formed as a normal Upper Cretaceous and was reactivated left-lateral Eocene. Structural, petrographical, isotopic, geochronological analyses shed light on sequence of deformational-diagenetic stages zone help identify properties that controlled fluid-flow behavior through time. Abrupt contrasts fracture abundance compared to undeformed host rock define damage containing fractures arranged regularly spaced...
Abstract Grenville-age (1.3–0.9 Ga) zircons represent one of the most ubiquitous detrital zircon (DZ) age modes on Earth. In North America, given widespread occurrence Grenville basement, DZs are commonly viewed as nondiagnostic with regard to source region in provenance studies. Systematic recovery DZ core-rim U-Pb ages makes it possible identify and differentiate previously indistinguishable basement terranes by leveraging their multistage tectono-magmatic evolution. Our analysis...
Abstract The geological evolution of orogens is the sum events related to both their cycle generation as well features inherited from basement units. Himalayan Orogen provides a well‐constrained Cenozoic history active plate convergence and orogenic processes overprinting an early Paleozoic orogen. A total 1,627 leucogranite zircons were depth‐profiled showing high resolution (0.6 μm) internal age structures. Zircon rim ages record detailed complex melting deformation, postdating North...
Research Article| January 30, 2019 Reappraisal of Miocene eolian deposition in Tianshui Basin, China, based on an investigation stratigraphy and provenance Shanpin Liu; Liu 1College Earth Environmental Sciences & Key Laboratory Western China’s Systems, Ministry Education, Lanzhou University, 730000, China Search for other works by this author on: GSW Google Scholar Jijun Li; Li † †Corresponding author: lijj@lzu.edu.cn. Daniel F. Stockli; Stockli 2Department Geological Sciences, Jackson...
The late Paleozoic is a period of pronounced climatic and tectonic change, characterized by the onset disappearance continental-scale glaciers across polar Gondwana, formation Pangea, widespread large igneous province volcanism. low-latitude equatorial tropics are assumed to be places persistent warm wet conditions throughout Phanerozoic, which through intense silicate weathering, exert major influence on Earth's climate via consumption atmospheric carbon carbonic hydrolytic clay minerals...
Abstract The tectonic affinity and origins of the Jurassic, siliciclastic San Cayetano Constancia formations exposed in western central Cuba Caribbean region remain debated. scarcity modern geochronologic studies on these Cuban units hampers both sedimentary provenance palinspastic reconstructions, resulting models that tend to oversimplify formation correlate Jurassic strata various regions such as North America, South Yucatán margin, or conceptual Caribeana domain. Using laser...