Please use this identifier to cite or link to this item:
http://hdl.handle.net/2122/9502
Authors: | Isola, I.* Mazzarini, F.* Bonini, M.* Corti, G.* |
Title: | Spatial variability of volcanic features in early-stage rift settings: the case of the Tanzania Divergence, East African rift system | Other Titles: | Variability of volcanic features in early-stage rifting | Journal: | Terra Nova | Series/Report no.: | /26 (2014) | Publisher: | Wiley-Blackwell | Issue Date: | 2014 | DOI: | 10.1111/ter.12121 | Keywords: | East Africa Rift System, Tanzania-Kenia, structures and volcanism | Subject Classification: | 04. Solid Earth::04.07. Tectonophysics::04.07.02. Geodynamics | Abstract: | Close relationships between deformation and volcanism are well documented in relatively late evolutionary stages of con- tinental rifting, whereas these are poorly constrained in less mature rifting stages. To investigate the control of inherited structures on faulting and volcanism, we present a statistical analysis of volcanic features, faults and pre-rift fabric in the Tanzania Divergence, where volcanic features occur exten- sively in in-rift and off-rift areas. Our results show that in mature rift sectors (Natron), magma uprising is mostly con- trolled by fractures/faults responding to the far-field stress, whereas the distribution of volcanism during initial rifting (Eyasi) is controlled by inherited structures oblique to the regional extension direction. Off-rift sectors show a marked control of pre-rift structures on magma emplacement, which may not respond to the regional stress field. Thus, the use of off-rift magmatic features as stress indicators should take into account the role of pre-existing structures. |
Appears in Collections: | Article published / in press |
Files in This Item:
File | Description | Size | Format | Existing users please Login |
---|---|---|---|---|
ter12121.pdf | Main Article | 3.3 MB | Adobe PDF |
WEB OF SCIENCETM
Citations
18
checked on Feb 10, 2021
Page view(s) 50
166
checked on Apr 17, 2024
Download(s)
23
checked on Apr 17, 2024