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Metadata Files

Data Publication

Magnetotelluric measurements in the Mérida Andes, western Venezuela

Ritter, Oliver | Cruces-Zabala, José | Weckmann, Ute | Tietze, Kristina | Schmitt, Reinhard | Schmitz, Michael

GFZ Data Services

(2021)

Descriptions

The 100 km wide Mérida Andes extend from the Colombian/Venezuelan border to the Caribbean coast. To the north and south, the Mérida Andes are bound by hydrocarbon-rich sedimentary basins. This mountain chain and its associated major strike-slip fault systems formed by the oblique convergence of the Caribbean with the South American Plate and the north-eastwards expulsion of the North Andean Block in western Venezuela. In 2013, the Integrated Geoscience of the Mérida Andes Project (the GIAME project) was initiated to image the Mérida Andes on a lithospheric scale and to develop a dynamic model of their evolution by integrating wide-angle seismic, magnetotelluric and potential field data. Magnetotelluric (MT) dataset was acquired in 2015 along a 240 km long profile across the Mérida Andes. MT studies of orogens often reveal complex resistivity structures, typically associated with active deformation and characterized by high electrical conductivity zones. Fluids in fault systems and fluids derived from remineralization reactions of hydrous minerals often characterise high conductivity in active tectonic regimes. Cruces-Zabala et al. (2020) identified conductive zones with up to 10 km depth for the Maracaibo Basin and 5 km for the Barinas - Apure Basin. The Mérida Andes are charaterized by high resistivity separated by several conductive anomalies that corelate spatialy to the fault systems at the surface. A conductive zone a great depth (>50km) was identified as a projection of the detachment surface of the Trujillo Block to the east. This data publication encompasses a detailed report in pdf format with a description of the project, information on the experimental setup, data collection, instrumentation used, recording configuration and data quality. The folder structure and content of the data repository are described in detail in Ritter et al. (2019). Time-series data are provided in EMERALD format (Ritter et al., 2015).
The Geophysical Instrument Pool Potsdam (GIPP) provides field instruments for (temporary) seismological studies (both controlled source and earthquake seismology) and for magnetotelluric (electromagnetic) experiments. The GIPP is operated by the GFZ German Research Centre for Geosciences. The instrument facility is open for academic use. Instrument applications are evaluated and ranked by an external steering board. See Haberland and Ritter (2016) and https://www.gfz-potsdam.de/gipp for more information.

Keywords


Originally assigned keywords
Magnetotellurics
MT inversion
continental tectonics
strike slip
transform fault
EARTH SCIENCE > SOLID EARTH > GEOMAGNETISM > MAGNETIC FIELD > GEOMAGNETIC INDUCTION

Corresponding MSL vocabulary keywords
transform fault

MSL enriched keywords
tectonic plate boundary
divergent tectonic plate boundary
plate spreading
transform fault
minerals
silicate minerals
cyclosilicates
beryl
Measured property
electrical properties
electrical conductivity
Inferred deformation behavior
microphysical deformation mechanism
fluid desorption
tectonic deformation structure
tectonic fault
strike-slip fault

MSL enriched sub domains i

rock and melt physics

Source

https://dataservices.gfz-potsdam.de/panmetaworks/showshort.php?id=aa26681a-5758-11ec-958d-ed2b0fcbcc9b

Source publisher

GFZ Data Services


DOI

10.5880/gipp-mt.201527.1


Creators

Ritter, Oliver

GFZ German Research Centre for Geosciences, Potsdam, Germany

ORCID:

https://orcid.org/0000-0002-2227-9503

Cruces-Zabala, José

GFZ German Research Centre for Geosciences, Potsdam, Germany

ORCID:

https://orcid.org/0000-0001-8673-2605

Weckmann, Ute

GFZ German Research Centre for Geosciences, Potsdam, Germany

ORCID:

https://orcid.org/0000-0002-4142-1018

Tietze, Kristina

GFZ German Research Centre for Geosciences, Potsdam, Germany

ORCID:

https://orcid.org/0000-0001-9679-245X

Schmitt, Reinhard

GFZ German Research Centre for Geosciences, Potsdam, Germany

Schmitz, Michael

FUNVISIS, Fundación Venezolana de Investigaciones Sismológicas, Venezuela

ORCID:

https://orcid.org/0000-0003-4543-2352


Contributors

Ritter, Oliver

ContactPerson

GFZ German Research Centre for Geosciences, Potsdam, Germany

ORCID:

https://orcid.org/0000-0002-2227-9503

Cruces-Zabala, José

ContactPerson

GFZ German Research Centre for Geosciences, Potsdam, Germany

ORCID:

https://orcid.org/0000-0001-8673-2605

Fundación Venezolana De Investigaciones Sismológicas (Funvisis)

DataCollector

Fundación Venezolana de Investigaciones Sismológicas (Funvisis)

GIPP-MT Team

ContactPerson

GFZ German Research Centre for Geosciences, Potsdam, Germany


References

https://gfzpublic.gfz-potsdam.de/pubman/item/item_5008890

10.2312/gfz.b103-19065

10.2312/gfz.b103-15082

10.1093/gji/ggaa266

10.17169/refubium-30489

10.17815/jlsrf-2-128

https://www.gfz-potsdam.de/gipp


Citation

Ritter, O., Cruces-Zabala, J., Weckmann, U., Tietze, K., Schmitt, R., & Schmitz, M. (2021). Magnetotelluric measurements in the Mérida Andes, western Venezuela [Data set]. GFZ Data Services. https://doi.org/10.5880/GIPP-MT.201527.1


Dates

Issued:

2021


Funding References

Funder name: Fondo Nacional de Ciencia Tecnología e Innovación

Funder identifier: https://doi.org/10.13039/501100007708

Funder identifier type: Crossref Funder ID

Award number: FONACIT-2012002202


Rights

Creative Commons Attribution 4.0 International


Geo location(s)

Study area in the Mérida Andes, western Venezuela


Spatial coordinates