A5048335845- Geological and Geochemical Analysis
- earthquake and tectonic studies
- Geochemistry and Geologic Mapping
- High-pressure geophysics and materials
- Astro and Planetary Science
- Geology and Paleoclimatology Research
- Geological and Geophysical Studies Worldwide
- Geochemistry and Elemental Analysis
- Archaeological and Geological Studies
- Paleontology and Stratigraphy of Fossils
- Planetary Science and Exploration
- Clay minerals and soil interactions
- Historical Astronomy and Related Studies
- Hydrocarbon exploration and reservoir analysis
- Radioactive element chemistry and processing
- Geological and Geophysical Studies
- Mineralogy and Gemology Studies
- Software Engineering Techniques and Practices
- Parallel Computing and Optimization Techniques
- Mining and Gasification Technologies
- Geochemistry and Geochronology of Asian Mineral Deposits
- Archaeological and Historical Studies
- Geoscience and Mining Technology
- Spacecraft and Cryogenic Technologies
- Geomagnetism and Paleomagnetism Studies
Chinese Academy of Sciences
2006-2023
Institute of Geology and Geophysics
2019-2023
Universitat de Barcelona
2016-2023
Zhejiang Ocean University
2023
Zhejiang University
2023
Central South University
2023
State Key Laboratory of Lithospheric Evolution
2022
Guangzhou Institute of Geochemistry
2006
Oxygen isotope ratios in mantle-derived magmas that differ from typical mantle values are generally attributed to crustal contamination, deeply subducted material the source or primordial heterogeneities. Here we provide an alternative view for origin of light oxygen-isotope signatures using kimberlites, carbonate-rich assimilate debris during ascent. Olivine grains kimberlites commonly zoned between a core and magmatic rim, thus constraining compositions both wall-rocks melt phase....
High-quality oxygen isotope analysis of composition-variable minerals (e.g., ubiquitous carbonates) using secondary ion mass spectrometry (SIMS) is extremely challenging. The classical off-line procedure, which requires additional electron probe microanalyzer (EPMA) chemical compositions for calibrating instrumental fractionation (IMF), inherently inaccurate and analytically inefficient. In this study, the first accurate paired SIMS δ18O Fe# [molar Fe/(Mg + Fe)] in dolomite reported. Based...
Abstract Kimberlites are deep and relatively rare mantle‐derived igneous rocks, which provide key insights into the lithospheric mantle composition beneath continents (i.e., from entrained materials) at time of magma emplacement. In addition, temporal distribution kimberlites throughout Earth's history may reveal secular changes in global geodynamics. However, alteration abundant exotic material xenoliths xenocrysts) different ages, both typical kimberlites, often hinder reliable dating...
The sequence of replacement in groundmass perovskite and spinel from SK-1 SK-2 kimberlites (Eastern Dharwar craton, India) has been established. Two types occur the studied Indian kimberlites. Type 1 is found groundmass, crystallized directly kimberlite magma, it light rare-earth elements (LREE)-rich Fe-poor its ΔNNO calculated value −3.82 to −0.73. second generation (type 2 perovskite) replacing atoll spinel, was formed hydrothermal fluids, LREE-free Fe-rich very high (from 1.03 10.52). may...
The Eureka deposit in Castell-estaó the Catalan Pyrenees is a Cu–U–V deposit, hosted by Triassic red-bed sandstones, and classified here as low-temperature, sandstone-hosted stratabound metamorphite U deposit. main mineralisation stratabound, related to coal-bearing units produced during Alpine deformation migration of hydrothermal fluids. In this stage, original sedimentary diagenetic components (quartz calcite, micas, hematite locally apatite) were replaced complex sequence roscoelite,...
espanolLa mineria de los recursos hierro del area Gava (Cataluna) fue activa forma intermitente durante las epocas Iberica y Romana, la Edad Media, hasta era industrial, lo cual se ha probado mediante datos arqueologicos documentos historicos. Es posible que, inclusive, en el haya existido periodo Neolitico. Las mineralizaciones formaron dos estadios: (1) alteracion hidrotermal regional asociada a cabalgamientos Hercinicos que produjo ankeritizaciones calizas series Paleozoico, (2)...
Abstract The pyroclastic carbonatitic rocks from the Catanda volcanic area (Angola) contain annite and phlogopite grains which have been affected to a significant extent by vermiculitization. A mineralogical study of these micas has revealed that was altered K-vermiculite while vermiculitization generated Ca-vermiculite. Intermediate alteration products such as intergrowths phlogopite/Ca-vermiculite were also found, but interstratified crystals phlogopite/ vermiculite, common intermediate...
We present the results of a detailed petrographic study fresh coherent samples Menominee kimberlite sampled at site 73, located in County, MI, USA. Our objective is to account for its unusual and complex paragenetic sequence. Several generations olivine, ilmenite, spinel-group minerals are described. Early olivine ilmenite xenocrystic were replaced or overgrown by primary minerals. Zoned microcrysts have core mantled first rim which rutile, geikielite, spinel s.s. (spinel sensu stricto)...
Climate change is a growing concern and paleoclimate reconstruction provides important information on current climate change. Paleoclimate through the analysis of climatic proxies large-scale numerical simulations involves calculation insolation, for which reliable convenient tool important. This study developed cross-platform graphical interface program calculating mean annual insolation using MATLAB. method employs elliptic integral method, based analytical expression offers both high...
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