Measurements of tectonic micro-displacements within the Idrija fault zone in the Učja valley (W Slovenia)

Andrej Gosar

doi:10.3986/AGS.7444

Avtorji

Andrej Gosar Slovenian Environment Agency, Seismology and Geology Office, Ljubljana

DOI:

https://doi.org/10.3986/AGS.7444

Ključne besede:

tektonika, geodinamika, prelom, ekstenziometer, Idrijski prelom, Učja, Slovenija

Povzetek

Recentna hitrost premikov ob aktivnem prelomu je zelo pomemben seizmotektonski para meter, ki pa ga ni lahko določiti. Idrijski prelom je z dolžino 120km pomembna geomorfološka struktura z velikim seizmogenim potencialom, ki pa ga je treba še raziskati. Meritve mikro-premikov lahko nudijo vpogled v recentno aktivnost preloma. Dolina Učje poteka prečno na Idrijski prelom, zaradi česar je bila izbrana za namestitev ekstenziometra TM 71. Meritve na razpoki v notranji prelomni coni potekajo od leta 2004.V 14 letih opazovanj je bilo ugotovljeno sistematično vodoravno zmikanje s povprečno hitrostjo 0,21mm/leto in podrejeni vertikalni premiki s hitrostjo 0,06mm/leto, kar dokazuje aktivnost tega preloma. Podan je pregled različnih metod raziskovanja recentnih premikov ob aktivnih prelomih ter novejših interdisciplinarnih raziskav Idrijskega preloma. Ocene hitrosti premikov so poleg geodinamskih interpretacij pomembne predvsem za izboljšanje seizmotektonskih modelov in s tem boljše ocenjevanje potresne nevarnosti.

Prenosi

Podatki o prenosih še niso na voljo.

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