A5048123653- Geology and Paleoclimatology Research
- Geological and Geochemical Analysis
- Planetary Science and Exploration
- Astro and Planetary Science
- earthquake and tectonic studies
- Geological and Geophysical Studies Worldwide
- Paleontology and Stratigraphy of Fossils
- Space Exploration and Technology
- Geochemistry and Geologic Mapping
- High-pressure geophysics and materials
- Methane Hydrates and Related Phenomena
- Geological formations and processes
- Hydrocarbon exploration and reservoir analysis
- Aeolian processes and effects
- Geological Studies and Exploration
- Seismology and Earthquake Studies
- Peatlands and Wetlands Ecology
- Geochemistry and Elemental Analysis
- Ecosystem dynamics and resilience
- Geological and Geophysical Studies
- Atmospheric and Environmental Gas Dynamics
- Geotechnical and construction materials studies
- Lichen and fungal ecology
- Isotope Analysis in Ecology
- Geodetic Measurements and Engineering Structures
Carleton University
2004-2024
National Research Tomsk State University
2022-2023
University of Ottawa
2004
Large igneous provinces (LIPs) are considered a relevant cause for mass extinctions of marine life throughout Earth's history. Their flood basalts and associated intrusions can significant release SO4 CO2 consequently, major environmental disruptions. Here, we reconstruct the long-term periodic pattern LIP emplacement its impact on ocean chemistry biodiversity from δ34Ssulfate last 520 Ma under particular consideration preservation limits records. A combination cross-wavelet other...
The Great Dyke of Atla Regio (GDAR) is traced for ~3700 km on Venus, as a surface graben (narrow trough) interpreted to overlie continuous laterally-emplaced underlying mafic dyke (vertical magma-filled crack). GDAR belongs giant radiating swarm associated with Ozza Mons (volcano), plume, and was fed from magma reservoir ~600 south the centre. A 50-degree counter-clockwise swing at 1200 centre consistent radius plume head, stress link 10,000 long Parga Chasmata rift system. Our discovery...
Abstract Atla Regio, Venus, is interpreted as a young major mantle plume centre, and we address whether it at head or tail stage. Our approach uses graben-fissure lineaments, the surface expression of dykes. Mapping > 40,000 such lineaments reveals giant radiating dyke swarms associated with volcanic centres Maat (>1500 km swarm radius), Ozza (>2000 km), Ongwuti (>1100 km) Unnamed montes indicating that each due to magmatism rather than (maximum length ~ 100 km). The size an...
Abstract A 90° change in stress orientation has been previously proposed as the trigger for final emplacement of world-class Norilsk-Talnakh magmatic sulfide mineralization via migration accumulated melts from elsewhere within plumbing system Siberian Traps large igneous province (LIP). We propose that this does not require and was triggered by a distal plate boundary stresses, but instead can be explained both temporally spatially changes recorded dike swarm patterns LIP, namely transition...
Atira Mons is a large (∼300,000 km2) low-relief (1.8 km) shield volcano, with individual flows extending up to ∼700 km from the central caldera. It located about 3000 NW major plume center Beta Regio. Detailed mapping of (at 1:500,000 scale, 10x more detailed than previous mapping) has identified fifty-three flow units which are grouped into eleven packages. Flow distinguished based on radar brightness, topography, morphology, continuity, structural modification, and sources, while packages...
Coronae are enigmatic, quasi-circular/elliptical tectono-magmatic features, common across the surface of Venus ranging in size from 60 to 2600 km and with a mean diameter 270 ± 190 km. This study undertook detailed mapping (1:500,000 scale) Heng-o Corona, second largest on Venus. 24,600 graben-fissure lineaments were mapped, interpreted be underlain by mafic dykes, grouped into radiating, circumferential linear swarms. A series 5 nearly-concentric rings identified unflooded or partially...
Parga Chasmata is a 10,000 km long rift system on Venus with abundant coronae (enigmatic circular tectonomagmatic features). In order to further investigate the rift-corona relationship, detailed 1:500,000 geological mapping was focused Onenhste Corona and surrounding region (16°-24° S, 145°-131° W). More than 46,000 extensional lineaments were mapped grouped into 50 sets, comprising 17 radiating, 28 circumferential 5 linear sets (interpreted overlie mafic dyke swarms). Radiating swarms are...
Abstract Planetary geologic maps are crucial tools for understanding the geological features and processes of solid bodies in Solar System. Over past six decades, best practices planetary mapping have emphasized clear objective observation, interpretation, multi‐sensor fusion, iterative revision based on new data. We summarize here four ways which serve as indispensable instruments scientific investigation, from enhancing observations to interrogating surface processes. With respect space...
We present a ~9200 yr high-resolution oxygen isotope record of plant cellulose (δ 18 O cel ) from the peat deposits Mer Bleue Bog, Ontario and apply it as proxy for paleotemperature reconstruction in Eastern Canada. The results show that δ Sphagnum follows general pattern Northern Hemisphere reconstructed last 2000 years at ratio ~2‰δ /°C. ombrotrophic phase Bog is also accordance with major features Holocene sunspot number reconstruction. Three distinct time intervals have low values:...
Abstract The Chuanlinggou Formation in the northern North China preserves world's earliest multicellular eukaryote microfossils. Here we present a high‐precision zircon U–Pb CA–ID–TIMS age of 1,641.7 ± 1.2 Ma for tuff layer within black shales Formation. new is similar to those obtained from Cuizhuang southern China, and Barney Creek Fraynes formations Australia, indicating synchronous deposition large volumes across both Australia at ca. 1640 Ma. Global correlations analysis spatial...