Thoughts…... of an MT mind

12/30/98


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Table of Contents

Thoughts of an MT mind

Roadmap...

EM methods (1)...

EM methods (2)...

Theory

Maxwell’s Equations

Ampere’s & Gauss’ Laws

Faraday-Henry Law

Faraday’s announcement

Other relationships….

Ohm’s Law….

Parameter measured: electrical resistivity Range...

Conduction mechanisms...

Electronic conduction - sulphides: THOT/NACP

Electronic conduction - graphite: AB

MT method...

MT advantages...

MT signals….

MT time series

PPT Slide

Skin Depth….

MT 1D response….

Shallow studies….

AMT signal analysis

AMT signal variation

Crustal studies….

EMSLAB: ElectroMagnetic Study of the Lithosphere, Asthenosphere and Beyond: Juan de Fuca

Southern Appalachians: Conductivity Model

INDEPTH: INternational DEep Profiling of Tibet and the Himalaya

INDEPTH: Tibet topography

INDEPTH-MT

INDEPTH-MT model

INDEPTH model

Western Churchill

WC: teleseismic results

WC: MT results

Western Churchill - MT model

Western Churchill - Results

Mantle studies….

Lithosphere….?

Partial melt…

Asthenosphere below NW Baltic Shield

Diamonds are forever….

Geophysical problem….

SNORCLE

Slave craton EM studies….

Site 106 1D Models

Site 106 1D Model with 70-80 km layer

Tibbet Lake - Nahanni lithospheric resistivity

Tibbet Lake - Nahanni lithospheric anisotropy

MT mantle conclusions

Carty Lake experiment…

Carty Lake GA inversions…

Conclusions…

Merry chrisTmas

Author: Alan G. Jones, GSC

Email: [email protected]

Home Page: http://www.cg.nrcan.gc.ca/staff/jones