Xiaoming Liu

State Key Laboratory of Continental Dynamics

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Yunpeng Dong

State Key Laboratory of Continental Dynamics

Wenshuai Li

Chongqing University of Science and Technology

Franz Neubauer

University of Salzburg

Huan Cui

Mississippi State University

Menghua Wang

NOAA National Environmental Satellite Data and Information Service

Yongfeng Hu

First Affiliated Hospital of Fujian Medical University

Xiaomin Fang

Chinese Academy of Sciences

Dengfeng He

State Key Laboratory of Continental Dynamics

Alan J. Kaufman

University of Maryland, College Park

Roberta L. Rudnick

University of California, Santa Barbara

Cooperative Institutions

Chinese Academy of Sciences

169

Northwest University

University of Chinese Academy of Sciences

China University of Geosciences

State Key Laboratory of Continental Dynamics

China Geological Survey

Nanjing University

China University of Geosciences (Beijing)

Institute of Tibetan Plateau Research

Institute of Geology and Geophysics

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Examining the Geologic Link of Arsenic Contamination in Groundwater in Orange County, North Carolina

Frontiers in Earth Science (2018)

Ethan Dinwiddie Xiaoming Liu

Ingestion of inorganic arsenic through food and water can have severe adverse health effects on the human body. Therefore, government regulations and health guidelines for arsenic concentrations in water have been established around the world to avoid or mitigate these health effects. In recent decades, analysis of groundwater in many locations around the world have revealed arsenic concentrations that exceed government regulation levels. The section of the Carolina Terrane located in North Carolina is one of such recently discovered areas. This study investigates the relationship between the geologic units of the Carolina Terrane and arsenic concentrations in well water samples in Orange County, North Carolina. Kriging interpolation mapping and multivariate analysis reveals spatial and geochemical connections between wells of detectable arsenic and the "Neoproterozoic epiclastics" unit and geochemical variables such as F-, pH, and alkalinity. These associations imply that arsenic in Orange County, NC is being mobilized from authigenic arsenic-bearing sulfide minerals in the "Neoproterozoic epiclastics" bedrock unit by oxidative release likely associated with increased F-, pH, and alkalinity.

Authigenic

Alkalinity

Sulfide Minerals

Bedrock

10.3389/feart.2018.00111

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Citations (9)

Geochronology, geochemistry and Nd–Hf isotopes of the Xiaokouzi granite from the Helanshan complex: Constraints on the Paleoproterozoic evolution of the Khondalite Belt, North China Craton

Precambrian Research (2018)

Wei Li Yunpeng Dong Xiaoming Liu

Protolith

Geochronology

10.1016/j.precamres.2018.08.021

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Citations (16)

U-Pb and 40Ar/39Ar geochronological constraints on the exhumation history of the North Qinling terrane, China

Gondwana Research (2010)

Yunpeng Dong Johann Genser Franz Neubauer Guowei Zhang Xiaoming Liu

Amphibole

10.1016/j.gr.2010.09.007

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Citations (145)

Primary or secondary? A dichotomy of the strontium isotope anomalies in the Ediacaran carbonates of Saudi Arabia

Precambrian Research (2020)

Huan Cui Alan J. Kaufman Haibo Zou Fayek Kattan Peter Trusler

Radiogenic nuclide

Snowball Earth

Isotopes of strontium

Radiometric dating

10.1016/j.precamres.2020.105720

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Citations (24)

Impacts of VIIRS SDR performance on ocean color products

Journal of Geophysical Research Atmospheres (2013)

Menghua Wang Xiaoming Liu Liqin Tan Lide Jiang SeungHyun Son

Abstract One of the primary goals for the Visible Infrared Imaging Radiometer Suite (VIIRS) on board the Suomi National Polar‐orbiting Partnership is to provide the science and user communities with the data continuity of the Environmental Data Records (EDR) (or Level‐2 products) over global oceanic waters for various research and applications, including assessment of climatic and environmental variations. The ocean color EDR is one of the most important products derived from VIIRS. Since ocean color EDR is processed from the upstream Sensor Data Records (SDR) (or Level‐1B data), the objective of this study is to evaluate the impact of the SDR on the VIIRS ocean color EDR. The quality of the SDR relies on prelaunch sensor characterizations as well as on‐orbit radiometric calibrations, which are used to develop the sensor F‐factor lookup tables (F‐LUTs). VIIRS F‐LUTs derived from solar and lunar calibrations have been used in processing data from the VIIRS Raw Data Records (or Level‐0 data) to SDR. In this study, three sets of F‐LUTs with different generation schemes have been used to reprocess the SDR and then the ocean color EDR for product evaluations. VIIRS ocean color products are compared with in situ data from the Marine Optical Buoy and products from the Moderate Resolution Imaging Spectroradiometer (MODIS) on the satellite Aqua. It is found that the data quality of VIIRS operational ocean color products before 6 February 2012 is poor due to the inappropriate use of the at‐launch F‐LUTs for the SDR calibration, and that the recently updated VIIRS F‐LUTs have significantly improved the SDR and ocean color EDR. Using reprocessed SDR with updated F‐LUTs and including vicarious calibration, VIIRS ocean color EDR products are consistent with those from MODIS‐Aqua in global deep waters. Although there are still some significant issues with VIIRS ocean color EDR, e.g., poor data quality over coastal regions, our results demonstrate that VIIRS has great potential to provide the science and user communities with consistently high‐quality global ocean color data records that are established from heritage ocean color sensors such as MODIS‐Aqua.

Ocean color

Buoy

Moderate-resolution imaging spectroradiometer

10.1002/jgrd.50793

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Citations (141)

The source of halogens in geothermal fluids from the Taupo Volcanic Zone, North Island, New Zealand

Geochimica et Cosmochimica Acta (2013)

Nelson F. Bernal Sarah A. Gleeson Abbie Dean Xiaoming Liu P. W. O. Hoskin

Fumarole

Hot spring

10.1016/j.gca.2013.11.003

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Citations (57)

Re-Os geochronology, O isotopes and mineral geochemistry of the Neoproterozoic Songshugou ultramafic massif in the Qinling Orogenic Belt, China

Gondwana Research (2019)

Shengsi Sun Yunpeng Dong Yali Sun Chao Cheng Xiaoxiao Huang

Ultramafic rock

Massif

Peridotite

10.1016/j.gr.2018.12.016

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Citations (25)

Tracing Earth’s O2 evolution using Zn/Fe ratios in marine carbonates

Geochemical Perspectives Letters (2015)

Xiaoming Liu Linda C. Kah Andrew H. Knoll Huan Cui A.J. Kaufman

Through Earth history, atmospheric oxygen has increased from initial values near zero to its present day level of about 21% by volume; concomitantly, changes in ocean redox conditions have fundamentally altered global biogeochemical cycles.While there is a reasonable understanding of where oxygen history begins and ends, the quantitative timetable of oxygenation that links the endpoints has proven contentious.Equilibrium between marine surface environments and the overlying atmosphere suggests that carbonate-based redox proxies could refine paleoredox records in time and space.Here we explore the use of Zn/Fe ratios to infer the evolution of atmospheric O 2 through time, based on marine carbonate rocks that are well characterized in terms of depositional age, environmental setting, and diagenetic history.While Fe and Zn in the shallow ocean is mainly sourced from hydrothermal inputs, their redox sensitivities differ significantly, so that geological intervals with higher O 2 would be characterized by stepped increases in Zn/Fe as preserved in shallow marine carbonates.Therefore, Zn/Fe analyses of ancient carbonates allow us to constrain past atmospheric pO 2 levels, providing a secular record of atmospheric O 2 over the past 3.5 billion years.In particular, we corroborate an earlier proposal that for much of the Proterozoic Eon, O 2 levels were as low as 0.1-1% of present atmospheric level.We conclude that Zn/Fe in shallow marine carbonate rocks has potential to provide a quantitative tracer for the long-term redox evolution of the oceans and the rise of atmospheric O 2 .

Tracing

10.7185/geochemlet.1603

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Citations (73)

Cerium anomaly as a tracer for paleo-oceanic redox conditions: A thermodynamics-based Ce oxidation modeling approach

Frontiers in Earth Science (2022)

Cheng Cao Xiaoming Liu Jun Chen

Reconstructing redox conditions in the paleo-ocean is essential to understand the Earth’s biogeochemical evolution. Cerium (Ce) anomaly in marine sediments has been used to distinguish oxic versus anoxic depositional environments in the Paleo-ocean. Previous studies suggested that dissolved oxygen is indispensable to cerium oxidation. Therefore, this reaction can be thermodynamically modeled to quantify oxygen contents in the ocean. This study presents a series of thermodynamics-based models to relate Ce anomaly to dissolved oxygen level. We then evaluated these models in two representatively settings, including an oxic ocean and anoxic basin. Finally, we examined the modeled relationship on a compiled dataset of cerium anomaly and dissolved oceanic oxygen content. These models suggest that the cerium anomaly is quantitatively related to oceanic oxygen, pH, and phosphate concentration. Notably, the results suggest that cerium anomaly is not sensitive to changes in dissolved oxygen in oxic environments. By contrast, Ce anomaly is well correlated with dissolved oxygen in anoxic environments, and it was less affected by pH and phosphate concentration. This research has significant implications for using lanthanide patterns in ancient marine carbonates to quantify dissolved oxygen level, especially during anoxic events in the Paleo-ocean.

Biogeochemical Cycle

Anomaly (physics)

10.3389/feart.2022.927826

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Citations (12)

Limitations of source-sink relationships deduced from provenance studies: U-Pb zircon vs. 40Ar/39Ar mica ages of recent river sands of the Eastern Alps

EGU General Assembly Conference Abstracts (2010)

Franz Neubauer Xiaoming Liu Johann Genser Yunpeng Dong Gertrude Friedl

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Citations (1)