diff --git a/content/authors/admin/_index.md b/content/authors/admin/_index.md index b070464..5cc7e36 100644 --- a/content/authors/admin/_index.md +++ b/content/authors/admin/_index.md @@ -6,28 +6,29 @@ title: "Xiao Xiao" superuser: true # Role/position/tagline -role: PhD candidate of Geophysics +role: Postdoctral Research Fellow # Organizations/Affiliations to show in About widget organizations: -- name: University of Science and Technology of China +- name: Nanyang Technological University url: https://www.ustc.edu.cn/ # Short bio (displayed in user profile at end of posts) -bio: My research interests include seismic tomography and earthquake location. +bio: My research interests include seismic tomography, earthquake location and geodynamic modelling. # Interests to show in About widget interests: -- Seismic tomography -- Seismic ambient noise source analysis -- Earthquake location +- Structure and Evolution of the Earth's Lithosphere +- Theory and Application of Seismic Tomography +- Observations of Seismic Sources +- Geodynamic Modelling # Education to show in About widget education: courses: - course: PhD in Geophysics institution: University of Science and Technology of China - year: 2023 (expected) + year: 2023 - course: BSc in Geophysics institution: Wuhan University year: 2017 @@ -63,8 +64,6 @@ email: "xiaox.seis@gmail.com" # Highlight the author in author lists? (true/false) highlight_name: true --- -**Xiao Xiao** is a PhD candidate in Geophysics at -[University of Science and Technology of China](http://en.ustc.edu.cn/), -supervised by Prof. Lianxing Wen. +**Xiao Xiao** is a Postdoctral Research Fellow at the Nanyang Technological University, supervised by Prof. Ping Tong. He received PhD in Geophysics at [University of Science and Technology of China](http://en.ustc.edu.cn/) under the guidance of Prof. Lianxing Wen. -His research is directed toward understanding the Earth's structure in the crust and upper mantle with seismological tools (e.g., seismic tomography and receiver function analysis). \ No newline at end of file +His research is directed toward understanding the Earth's structure in the crust and upper mantle with seismological (e.g., seismic tomography and receiver function analysis) and geodynamical tools. \ No newline at end of file diff --git a/content/cv/index.md b/content/cv/index.md index 0de74cc..c64e44e 100644 --- a/content/cv/index.md +++ b/content/cv/index.md @@ -8,12 +8,17 @@ title: Curriculum Vitae ### Education -- **2023**: Ph.D in Geophysics (Expected), +- **2023**: Ph.D in Geophysics, [University of Science and Technology of China](http://en.ustc.edu.cn/), Hefei, China - **2017**: B.S. in Geophysics, [Wuhan University](https://en.whu.edu.cn/), Wuhan, China +--- +### Professional Appointments + +- **2023/12 -- present:** Postdoctral Research Fellow at Nanyang Technological University, Singapore + --- ### Professional Societies & Services @@ -22,7 +27,7 @@ title: Curriculum Vitae - **Spring, 2019:** Student Organizer of “Weekly Graduate Student Seminar of Geophysics, USTC” - **2017 -- 2017:** Assist in coordinating exchange meeting of China Seismological Reference Model work group - **2017 -- present:** Member of the American Geophysical Union (AGU) -- **2017 -- present:** Research assistant and database manager for China Seismological Reference Model work group +- **2017 -- present:** Construction member of China Seismological Reference Model - **2016 -- present:** Contributor of GMT China Community --- diff --git a/content/home/contact.md b/content/home/contact.md index c3341b5..772f7c4 100644 --- a/content/home/contact.md +++ b/content/home/contact.md @@ -27,15 +27,15 @@ content: # Contact details (edit or remove options as required) email: xiaox.seis@gmail.com address: - street: Jinzhai Road - city: Hefei - region: Anhui - postcode: '230026' - country: China + street: 50 Nanyang Ave + city: Singapore + region: + postcode: '639798' + country: Singapore country_code: coordinates: - latitude: '31.841339' - longitude: '117.270375' + latitude: '103.5' + longitude: '1.0' design: columns: '2' diff --git a/content/project/CSRM/CSRM-1.0-Vs.png b/content/project/CSRM/CSRM-1.0-Vs.png new file mode 100644 index 0000000..6ac65ce Binary files /dev/null and b/content/project/CSRM/CSRM-1.0-Vs.png differ diff --git a/content/project/CSRM/featured.png b/content/project/CSRM/featured.png new file mode 100644 index 0000000..f85aec6 Binary files /dev/null and b/content/project/CSRM/featured.png differ diff --git a/content/project/CSRM/index.md b/content/project/CSRM/index.md new file mode 100644 index 0000000..0cf6512 --- /dev/null +++ b/content/project/CSRM/index.md @@ -0,0 +1,62 @@ +--- +# Documentation: https://wowchemy.com/docs/managing-content/ + +title: 'China Seismological Reference Model' +summary: | + Goal of this project are two folds: 1) constructing a reference seismic model of the crust and uppermost mantle beneath the continental China with multiple seismic constraints where a top-down construction regime is adopted, 2) understanding compositional and thermal states of bedrocks in the crust and uppermost mantle beneath continental China. + +tags: +- China Seismic Structure + +date: 2024-09-13T00:00:00 +weight: 1 +math: true + +# Optional external URL for project (replaces project detail page). +external_link: "" + +# Featured image +# To use, add an image named `featured.jpg/png` to your page's folder. +# Focal points: Smart, Center, TopLeft, Top, TopRight, Left, Right, BottomLeft, Bottom, BottomRight. +image: + caption: "" + focal_point: "" + preview_only: true + +# Custom links (optional). +# Uncomment and edit lines below to show custom links. +# links: +# - name: Follow +# url: https://twitter.com +# icon_pack: fab +# icon: twitter + +url_code: "" +url_pdf: "" +url_slides: "" +url_video: "" + +# Slides (optional). +# Associate this project with Markdown slides. +# Simply enter your slide deck's filename without extension. +# E.g. `slides = "example-slides"` references `content/slides/example-slides.md`. +# Otherwise, set `slides = ""`. +slides: "" +--- + +## CSRM-1.0: A China Seismological Reference Model of the crust and uppermost mantle + + We construct a high-resolution China Seismological Reference Model (CSRM-1.0) in the top 100 km of the crust and uppermost mantle in continental China following a top-down construction process. The employed seismic constraints include P-wave polarization angle from tele-seismic event, short-period Rayleigh wave ellipticity from ambient noise, long-period Rayleigh wave ellipticity from earthquake data, receiver function, empirical Green’s function from ambient noise, Rayleigh wave phase/group velocity dispersion curves from regional earthquakes, and Pn-wave travel time extracted from seismic data of 4435 stations. CSRM-1.0 has a spatial crustal resolution of ~60 km beneath the north-south seismic belt and trans-North China orogen regions and ~120 km beneath the rest of continental China, and a spatial mantle resolution of ~300 km. CSRM-1.0 exhibits prominent velocity heterogeneities in the crust and uppermost mantle and an eastward thinning of the crust, geographically correlating with geological settings. CSRM-1.0 improvements include accurate estimation of shallow seismic structure, increased spatial resolution and improved model accuracy. Crustal composition inferred from CSRM-1.0 exhibits a general transition from a felsic upper crust to a mafic lower crust. Mafic rocks in the lower crust are found predominantly along inter-block boundaries and sporadically within the interiors of blocks, likely resulted from preferential inter-block intrusions of magmas related to various oceanic plate subductions and the Emeishan mantle plume. This study contributes seismic constraints and CSRM-1.0 to the CSRM product center (http://chinageorefmodel.org) as a backbone open-access geophysical cyberinfrastructure. + + +{{< figure src="CSRM-1.0-Vs.png" numbered="true" alt="CSRM-1.0 Vs structure" title="CSRM-1.0 Vs structure" >}} + + + +## Shallow 3D shear wave velocity model of the uppermost crust beneath the continental China + +We construct a high-resolution shallow three-dimensional (3D) seismic model in the top 10 km of the upper crust in the continental China, with constraints of P polarization, Rayleigh wave ellipticity and receiver function obtained from records of 3848 seismic stations. Our 3D seismic model has a spatial resolution of $0.6°-1.2^°$ in the north-south seismic belt and the trans-north China orogen, and $1^°-2^°$ in the rest of the continental China (except the Tarim basin and the southwest Tibet). The seismic model exhibits low velocity anomalies of deposits in major sedimentary basins and high velocity anomalies of crustal bedrocks in young orogenic belts and old tectonic blocks. The inferred sediment thickness maps display thick deposits in major sedimentary basins, some compacted sediments in the intermontane basins in young orogenic belts and little sediments in old tectonic blocks. We also discuss compaction effects of the sediments and implications of tectonic history and geological evolution of the major basins in the continental China based on the inferred seismic models. + +{{< figure src="shallowModel.png" numbered="true" alt="Shallow seismic structure beneath the continental China" title="Shallow 3D shear wave velocity model beneath the continental China" >}} \ No newline at end of file diff --git a/content/project/shallow-seismic-structure/shallowModel.png b/content/project/CSRM/shallowModel.png similarity index 100% rename from content/project/shallow-seismic-structure/shallowModel.png rename to content/project/CSRM/shallowModel.png diff --git a/content/project/simulataneous-inversion-phase-velocity-and-source/Joint.inversion.structure.png b/content/project/Seismic-Tomography-Method/Joint.inversion.structure.png similarity index 100% rename from content/project/simulataneous-inversion-phase-velocity-and-source/Joint.inversion.structure.png rename to content/project/Seismic-Tomography-Method/Joint.inversion.structure.png diff --git a/content/project/simulataneous-inversion-phase-velocity-and-source/featured.png b/content/project/Seismic-Tomography-Method/featured.png similarity index 100% rename from content/project/simulataneous-inversion-phase-velocity-and-source/featured.png rename to content/project/Seismic-Tomography-Method/featured.png diff --git a/content/project/Seismic-Tomography-Method/index.md b/content/project/Seismic-Tomography-Method/index.md new file mode 100644 index 0000000..6a7d7e6 --- /dev/null +++ b/content/project/Seismic-Tomography-Method/index.md @@ -0,0 +1,51 @@ +--- +# Documentation: https://wowchemy.com/docs/managing-content/ + +title: "Development and Application of Seismic Tomography Method" +summary: | + This project aims at developing and applying multiple novel seismic tomoghraphy method for better understanding structures in Earth's interior. + +tags: +- Seismic Imaging Method + +date: 2022-09-01T00:00:00 +weight: 1 +math: true + +# Optional external URL for project (replaces project detail page). +external_link: "" + +# Featured image +# To use, add an image named `featured.jpg/png` to your page's folder. +# Focal points: Smart, Center, TopLeft, Top, TopRight, Left, Right, BottomLeft, Bottom, BottomRight. +image: + caption: "" + focal_point: "" + preview_only: true + +# Custom links (optional). +# Uncomment and edit lines below to show custom links. +# links: +# - name: Follow +# url: https://twitter.com +# icon_pack: fab +# icon: twitter + +url_code: "" +url_pdf: "" +url_slides: "" +url_video: "" + +# Slides (optional). +# Associate this project with Markdown slides. +# Simply enter your slide deck's filename without extension. +# E.g. `slides = "example-slides"` references `content/slides/example-slides.md`. +# Otherwise, set `slides = ""`. +slides: "" +--- + +## Simultaneous inversion for surface wave phase velocity and earthquake centroid parameters + + We develope a new method to simultaneously determine surface wave phase velocity and earthquake centroid parameters in three steps: 1) preliminary phase velocity inversion based on seismic ambient noise, 2) preliminary earthquake relocation based on earthquake surface wave data, and 3) simultaneous inversion for phase velocity and earthquake centroid parameters with constraints of inter-station phase velocity measurements based on seismic ambient noise and event-station phase velocity measurements based on earthquake surface wave data. Application of the method in the North South Seismic Belt region in China results in high-resolution Rayleigh wave phase velocity maps and accurate earthquake centroid parameters. The additional earthquake data notably improve resolution of the inverted phase velocity model in west Yunnan and central Tibetan blocks, the regions with sparse seismic station coverage. The inverted phase velocity model exhibits high-velocity anomalies in cratonic regions and the Emeishan Large Igneous Province, and low-velocity anomalies in the interior and surrounding regions of the Tibetan Plateau. Relocation places earthquakes in shallow depths with geotherm above the crustal rock’s brittle-ductile transition temperature of ~400℃, revealing thermal control on thickness of the seismogenic zone. With earthquake centroid parameters constrained, earthquake data are expected to provide further constraints on the deep seismic structure that is beyond the sampling limit of seismic ambient noise. + + {{< figure src="Joint.inversion.structure.png" numbered="true" alt="Inverted Rayleigh wave phase velocity and earthquake centroid parameters" title="Inverted Rayleigh wave phase velocity and earthquake centroid parameters" >}} diff --git a/content/project/shallow-seismic-structure/featured.png b/content/project/shallow-seismic-structure/featured.png deleted file mode 100644 index 56a9b9e..0000000 Binary files a/content/project/shallow-seismic-structure/featured.png and /dev/null differ diff --git a/content/project/shallow-seismic-structure/index.md b/content/project/shallow-seismic-structure/index.md deleted file mode 100644 index 397b787..0000000 --- a/content/project/shallow-seismic-structure/index.md +++ /dev/null @@ -1,52 +0,0 @@ ---- -# Documentation: https://wowchemy.com/docs/managing-content/ - -title: Shallow seismic structure beneath the contiental China -summary: | - Goal of this project are two folds: 1) understanding the compositional and thermal states of bedrocks in the upper crust of the Contiental China and 2) constructing a reference shallow seismic model for future studies of imaging deeper seismic structure. - -tags: -- China Seismic Structure - -date: 2021-05-20T00:00:00 -weight: 1 -math: true - -# Optional external URL for project (replaces project detail page). -external_link: "" - -# Featured image -# To use, add an image named `featured.jpg/png` to your page's folder. -# Focal points: Smart, Center, TopLeft, Top, TopRight, Left, Right, BottomLeft, Bottom, BottomRight. -image: - caption: "" - focal_point: "" - preview_only: true - -# Custom links (optional). -# Uncomment and edit lines below to show custom links. -# links: -# - name: Follow -# url: https://twitter.com -# icon_pack: fab -# icon: twitter - -url_code: "" -url_pdf: "" -url_slides: "" -url_video: "" - -# Slides (optional). -# Associate this project with Markdown slides. -# Simply enter your slide deck's filename without extension. -# E.g. `slides = "example-slides"` references `content/slides/example-slides.md`. -# Otherwise, set `slides = ""`. -slides: "" ---- - -### Shallow 3D shear wave velocity model of the uppermost crust beneath the continental China - -{{< figure src="shallowModel.png" numbered="true" alt="Shallow seismic structure beneath the continental China" title="Shallow 3D shear wave velocity model beneath the continental China" >}} - -In this study, we construct a high-resolution shallow three-dimensional (3D) seismic model in the top 10 km of the upper crust in the continental China, with constraints of P polarization, Rayleigh wave ellipticity and receiver function obtained from records of 3848 seismic stations. Our 3D seismic model has a spatial resolution of $0.6°-1.2^°$ in the north-south seismic belt and the trans-north China orogen, and $1^°-2^°$ in the rest of the continental China (except the Tarim basin and the southwest Tibet). The seismic model exhibits low velocity anomalies of deposits in major sedimentary basins and high velocity anomalies of crustal bedrocks in young orogenic belts and old tectonic blocks. The inferred sediment thickness maps display thick deposits in major sedimentary basins, some compacted sediments in the intermontane basins in young orogenic belts and little sediments in old tectonic blocks. We also discuss compaction effects of the sediments and implications of tectonic history and geological evolution of the major basins in the continental China based on the inferred seismic models. - diff --git a/content/project/simulataneous-inversion-phase-velocity-and-source/index.md b/content/project/simulataneous-inversion-phase-velocity-and-source/index.md deleted file mode 100644 index c2f9185..0000000 --- a/content/project/simulataneous-inversion-phase-velocity-and-source/index.md +++ /dev/null @@ -1,51 +0,0 @@ ---- -# Documentation: https://wowchemy.com/docs/managing-content/ - -title: "Simultaneous inversion for surface wave phase velocity and earthquake centroid parameters" -summary: | - Our goals are two folds: 1) to develop and test a strategy of combining seismic ambient noise and regional earthquake surface wave data in constraining seismic structure of the Earth and 2) to provide high-resolution phase velocity maps and earthquake centroid parameters in the North South Seismic Belt region in the continental China and gain insights on evolutional histories of the region. - -tags: -- Seismic Imaging Method - -date: 2022-09-01T00:00:00 -weight: 1 -math: true - -# Optional external URL for project (replaces project detail page). -external_link: "" - -# Featured image -# To use, add an image named `featured.jpg/png` to your page's folder. -# Focal points: Smart, Center, TopLeft, Top, TopRight, Left, Right, BottomLeft, Bottom, BottomRight. -image: - caption: "" - focal_point: "" - preview_only: true - -# Custom links (optional). -# Uncomment and edit lines below to show custom links. -# links: -# - name: Follow -# url: https://twitter.com -# icon_pack: fab -# icon: twitter - -url_code: "" -url_pdf: "" -url_slides: "" -url_video: "" - -# Slides (optional). -# Associate this project with Markdown slides. -# Simply enter your slide deck's filename without extension. -# E.g. `slides = "example-slides"` references `content/slides/example-slides.md`. -# Otherwise, set `slides = ""`. -slides: "" ---- - -### Simultaneous inversion for surface wave phase velocity and earthquake centroid parameters - -{{< figure src="Joint.inversion.structure.png" numbered="true" alt="Inverted Rayleigh wave phase velocity and earthquake centroid parameters" title="Inverted Rayleigh wave phase velocity and earthquake centroid parameters" >}} - - In this study, we address this issue by developing a new method to simultaneously determine surface wave phase velocity and earthquake centroid parameters in three steps: 1) preliminary phase velocity inversion based on seismic ambient noise, 2) preliminary earthquake relocation based on earthquake surface wave data, and 3) simultaneous inversion for phase velocity and earthquake centroid parameters with constraints of inter-station phase velocity measurements based on seismic ambient noise and event-station phase velocity measurements based on earthquake surface wave data. Application of the method in the North South Seismic Belt region in China results in high-resolution Rayleigh wave phase velocity maps and accurate earthquake centroid parameters. The additional earthquake data notably improve resolution of the inverted phase velocity model in west Yunnan and central Tibetan blocks, the regions with sparse seismic station coverage. The inverted phase velocity model exhibits high-velocity anomalies in cratonic regions and the Emeishan Large Igneous Province, and low-velocity anomalies in the interior and surrounding regions of the Tibetan Plateau. Relocation places earthquakes in shallow depths with geotherm above the crustal rock’s brittle-ductile transition temperature of ~400℃, revealing thermal control on thickness of the seismogenic zone. With earthquake centroid parameters constrained, earthquake data are expected to provide further constraints on the deep seismic structure that is beyond the sampling limit of seismic ambient noise. diff --git a/content/publication/2024_CSRM-1.0/featured.png b/content/publication/2024_CSRM-1.0/featured.png new file mode 100644 index 0000000..f85aec6 Binary files /dev/null and b/content/publication/2024_CSRM-1.0/featured.png differ diff --git a/content/publication/2024_CSRM-1.0/index.md b/content/publication/2024_CSRM-1.0/index.md new file mode 100644 index 0000000..e34b8d2 --- /dev/null +++ b/content/publication/2024_CSRM-1.0/index.md @@ -0,0 +1,90 @@ +--- +# Documentation: https://wowchemy.com/docs/managing-content/ + +title: "CSRM-1.0: A China Seismological Reference Model" +authors: +- admin +- Shihua Cheng +- Jianping Wu +- Weilai Wang +- Li Sun +- Xiaoxin Wang +- Jiayu Ma +- Yinghua Tong +- Xiaofeng Liang +- Xiaobo Tian +- Hongyi Li +- Qi-fu Chen +- Sheng Yu +- Lianxing Wen + +date: "2024-09-13T00:00:00Z" +doi: "10.1029/2024JB029520" + +# Schedule page publish date (NOT publication's date). +publishDate: "2024-09-13T00:00:00Z" + +# Publication type. +# Legend: 0 = Uncategorized; 1 = Conference paper; 2 = Journal article; +# 3 = Preprint / Working Paper; 4 = Report; 5 = Book; 6 = Book section; +# 7 = Thesis; 8 = Patent +publication_types: ["2"] + +# Publication name and optional abbreviated publication name. +publication: "*Journal of Geophysical Research: Solid Earth*" +publication_short: "" + +abstract: | + High-resolution seismic model is crucial for advancing our understandings on geological processes and enhancing seismic hazard mitigation programs. We construct a high-resolution China Seismological Reference Model (CSRM-1.0) in the top 100 km of the crust and uppermost mantle in continental China following a top-down construction process. The employed seismic constraints include P-wave polarization angle from tele-seismic event, short-period Rayleigh wave ellipticity from ambient noise, long-period Rayleigh wave ellipticity from earthquake data, receiver function, empirical Green’s function from ambient noise, Rayleigh wave phase/group velocity dispersion curves from regional earthquakes, and Pn-wave travel time extracted from seismic data of 4435 stations. CSRM-1.0 has a spatial crustal resolution of ~60 km beneath the north-south seismic belt and trans-North China orogen regions and ~120 km beneath the rest of continental China, and a spatial mantle resolution of ~300 km. CSRM-1.0 exhibits prominent velocity heterogeneities in the crust and uppermost mantle and an eastward thinning of the crust, geographically correlating with geological settings. CSRM-1.0 improvements include accurate estimation of shallow seismic structure, increased spatial resolution and improved model accuracy. Crustal composition inferred from CSRM-1.0 exhibits a general transition from a felsic upper crust to a mafic lower crust. Mafic rocks in the lower crust are found predominantly along inter-block boundaries and sporadically within the interiors of blocks, likely resulted from preferential inter-block intrusions of magmas related to various oceanic plate subductions and the Emeishan mantle plume. This study contributes seismic constraints and CSRM-1.0 to the CSRM product center (http://chinageorefmodel.org) as a backbone open-access geophysical cyberinfrastructure. + + +# Summary. An optional shortened abstract. +summary: | + 1. CSRM-1.0 is constructed with various seismic constraints from data of 4435 stations using a self-consistent top-down construction process + 2. CSRM-1.0 improvements include accurate estimation of shallow seismic structure, increased spatial resolution, and enhanced model accuracy + 3. CSRM-1.0 reveals major crustal mafic rocks related to the past subductions, an Emeishan mantle plume and geological inter-block boundaries + +tags: [] +categories: [] +featured: true + +# Custom links (optional). +# Uncomment and edit lines below to show custom links. +# links: +# - name: Follow +# url: https://twitter.com +# icon_pack: fab +# icon: twitter +url_google_scholar: "" +url_pdf: +url_code: +url_dataset: "https://doi.org/10.5281/zenodo.8103561" +url_poster: +url_project: +url_slides: +url_source: +url_video: + +# Featured image +# To use, add an image named `featured.jpg/png` to your page's folder. +# Focal points: Smart, Center, TopLeft, Top, TopRight, Left, Right, BottomLeft, Bottom, BottomRight. +image: + caption: "" + focal_point: "" + preview_only: false + +# Associated Projects (optional). +# Associate this publication with one or more of your projects. +# Simply enter your project's folder or file name without extension. +# E.g. `internal-project` references `content/project/internal-project/index.md`. +# Otherwise, set `projects: []`. +projects: +- "China Seismic Structure" + +# Slides (optional). +# Associate this publication with Markdown slides. +# Simply enter your slide deck's filename without extension. +# E.g. `slides: "example"` references `content/slides/example/index.md`. +# Otherwise, set `slides: ""`. +slides: "" +---