Upper Mantle P and S Wave Velocity Structure of the Kalahari Craton and Surrounding Proterozoic Terranes, Southern Africa
Abstract New broadband seismic data from Botswana and South Africa have been combined with existing data from the region to develop improved P and S wave velocity models for investigating the upper mantle structure of southern Africa. Higher craton‐like velocities are imaged beneath the Rehoboth Pro...
Saved in:
| Main Authors: | , , , , , , , , |
|---|---|
| Format: | Article |
| Language: | English |
| Published: |
Wiley
2019-08-01
|
| Series: | Geophysical Research Letters |
| Online Access: | https://doi.org/10.1029/2019GL084053 |
| Tags: |
Add Tag
No Tags, Be the first to tag this record!
|
| _version_ | 1850200416458899456 |
|---|---|
| author | Kameron Ortiz Andrew Nyblade Mark van derMeijde Hanneke Paulssen Motsamai Kwadiba Onkgopotse Ntibinyane Raymond Durrheim Islam Fadel Kyle Homman |
| author_facet | Kameron Ortiz Andrew Nyblade Mark van derMeijde Hanneke Paulssen Motsamai Kwadiba Onkgopotse Ntibinyane Raymond Durrheim Islam Fadel Kyle Homman |
| author_sort | Kameron Ortiz |
| collection | DOAJ |
| description | Abstract New broadband seismic data from Botswana and South Africa have been combined with existing data from the region to develop improved P and S wave velocity models for investigating the upper mantle structure of southern Africa. Higher craton‐like velocities are imaged beneath the Rehoboth Province and parts of the northern Okwa Terrane and the Magondi Belt, indicating that the northern edge of the greater Kalahari Craton lithosphere lies along the northern boundary of these terranes. Lower off‐craton velocities are imaged beneath the Damara‐Ghanzi‐Chobe Belt, and may in part reflect thinning of the lithosphere beneath the incipient Okavango Rift. Lower velocities are also imaged to the north and northwest of the Bushveld Complex beneath parts of the Okwa Terrane, Magondi Belt, and Limpopo Belt, indicating that cratonic upper mantle in some areas beneath these terranes may have been modified by the 2.05‐Ga Bushveld and/or 1.1‐Ga Umkondo magmatic events. |
| format | Article |
| id | doaj-art-86b4f15722fe4380938698d3c8b13637 |
| institution | OA Journals |
| issn | 0094-8276 1944-8007 |
| language | English |
| publishDate | 2019-08-01 |
| publisher | Wiley |
| record_format | Article |
| series | Geophysical Research Letters |
| spelling | doaj-art-86b4f15722fe4380938698d3c8b136372025-08-20T02:12:20ZengWileyGeophysical Research Letters0094-82761944-80072019-08-0146169509951810.1029/2019GL084053Upper Mantle P and S Wave Velocity Structure of the Kalahari Craton and Surrounding Proterozoic Terranes, Southern AfricaKameron Ortiz0Andrew Nyblade1Mark van derMeijde2Hanneke Paulssen3Motsamai Kwadiba4Onkgopotse Ntibinyane5Raymond Durrheim6Islam Fadel7Kyle Homman8Department of Geosciences Pennsylvania State University University Park PA USADepartment of Geosciences Pennsylvania State University University Park PA USAFaculty for Geo‐information Science and Earth Observation (ITC) University of Twente Enschede NetherlandsDepartment of Earth Sciences, Faculty of Geosciences Utrecht University Utrecht NetherlandsBotswana Geoscience Institute Lobatse BotswanaBotswana Geoscience Institute Lobatse BotswanaSchool of Geosciences The University of the Witwatersrand Johannesburg South AfricaFaculty for Geo‐information Science and Earth Observation (ITC) University of Twente Enschede NetherlandsDepartment of Geosciences Pennsylvania State University University Park PA USAAbstract New broadband seismic data from Botswana and South Africa have been combined with existing data from the region to develop improved P and S wave velocity models for investigating the upper mantle structure of southern Africa. Higher craton‐like velocities are imaged beneath the Rehoboth Province and parts of the northern Okwa Terrane and the Magondi Belt, indicating that the northern edge of the greater Kalahari Craton lithosphere lies along the northern boundary of these terranes. Lower off‐craton velocities are imaged beneath the Damara‐Ghanzi‐Chobe Belt, and may in part reflect thinning of the lithosphere beneath the incipient Okavango Rift. Lower velocities are also imaged to the north and northwest of the Bushveld Complex beneath parts of the Okwa Terrane, Magondi Belt, and Limpopo Belt, indicating that cratonic upper mantle in some areas beneath these terranes may have been modified by the 2.05‐Ga Bushveld and/or 1.1‐Ga Umkondo magmatic events.https://doi.org/10.1029/2019GL084053 |
| spellingShingle | Kameron Ortiz Andrew Nyblade Mark van derMeijde Hanneke Paulssen Motsamai Kwadiba Onkgopotse Ntibinyane Raymond Durrheim Islam Fadel Kyle Homman Upper Mantle P and S Wave Velocity Structure of the Kalahari Craton and Surrounding Proterozoic Terranes, Southern Africa Geophysical Research Letters |
| title | Upper Mantle P and S Wave Velocity Structure of the Kalahari Craton and Surrounding Proterozoic Terranes, Southern Africa |
| title_full | Upper Mantle P and S Wave Velocity Structure of the Kalahari Craton and Surrounding Proterozoic Terranes, Southern Africa |
| title_fullStr | Upper Mantle P and S Wave Velocity Structure of the Kalahari Craton and Surrounding Proterozoic Terranes, Southern Africa |
| title_full_unstemmed | Upper Mantle P and S Wave Velocity Structure of the Kalahari Craton and Surrounding Proterozoic Terranes, Southern Africa |
| title_short | Upper Mantle P and S Wave Velocity Structure of the Kalahari Craton and Surrounding Proterozoic Terranes, Southern Africa |
| title_sort | upper mantle p and s wave velocity structure of the kalahari craton and surrounding proterozoic terranes southern africa |
| url | https://doi.org/10.1029/2019GL084053 |
| work_keys_str_mv | AT kameronortiz uppermantlepandswavevelocitystructureofthekalaharicratonandsurroundingproterozoicterranessouthernafrica AT andrewnyblade uppermantlepandswavevelocitystructureofthekalaharicratonandsurroundingproterozoicterranessouthernafrica AT markvandermeijde uppermantlepandswavevelocitystructureofthekalaharicratonandsurroundingproterozoicterranessouthernafrica AT hannekepaulssen uppermantlepandswavevelocitystructureofthekalaharicratonandsurroundingproterozoicterranessouthernafrica AT motsamaikwadiba uppermantlepandswavevelocitystructureofthekalaharicratonandsurroundingproterozoicterranessouthernafrica AT onkgopotsentibinyane uppermantlepandswavevelocitystructureofthekalaharicratonandsurroundingproterozoicterranessouthernafrica AT raymonddurrheim uppermantlepandswavevelocitystructureofthekalaharicratonandsurroundingproterozoicterranessouthernafrica AT islamfadel uppermantlepandswavevelocitystructureofthekalaharicratonandsurroundingproterozoicterranessouthernafrica AT kylehomman uppermantlepandswavevelocitystructureofthekalaharicratonandsurroundingproterozoicterranessouthernafrica |