Sequential extension as a record of Corsica Rotation during Apennines slab roll-back
22
Citation
51
Reference
10
Related Paper
Citation Trend
Keywords:
Clockwise
Metamorphic core complex
Isograd
Cite
Citations (2)
Cite
Citations (0)
Cite
Citations (5)
According to an integrated study of the data of regional survey of the1∶50000Xingan Map Se-ries in the Xiajiang area,central Jiangxi ,the authors for the first time propose the view that the Devonian strata in the area are an allochthon and hold that the Devonian was thrust from NW to SE i n the late In-dosinian to early Yanshanian and then again underwent extension and detachment to the SE in the late Yanshanian stage.There are many reports a bout the existence of thrust nappe and sliding nappe structures in northern an d southern Jiangxi but few reports have been read that they exist in central J iangxi.The dis-covery and determination of thrust nappe and sliding nappe str uctures in the Xiajiang area this time have great tectonic significance for th e understanding the relation of the NNE-trending thrust nappe and sliding napp e structures between southern and northern Jiangxi and even the understanding o f the whole.This paper mainly deals with the characteristics of the thrust na ppe and sliding nappe structures with detailed field first-hand data and prelim inarily analyzes their genetic mechanism.
Devonian
Cite
Citations (0)
The Jurassic Scisti Silicei Formation forms part of the Lagonegro superimposed tectonic units I and II that are thought to represent the axial and internal margins of the Mesozoic Lagonegro Basin, prior to nappe formation. Sampling was carried out in the lower (Lagonegro) and upper (Pignola) nappes in two differently oriented anticlines. Single and multi-component magnetizations are present. Isothermal remanence acquisition rates show that magnetite and haematite are present which, in most Lagonegro specimens, show the same direction of magnetization. Comparison of the palaeomagnetic directions with those from Jurassic rocks on the stable African craton indicates a 147° anticlockwise rotation of the lower nappe which is similar to 139° previously reported for the upper nappe at Vietri di Potenza. The same comparisons show a 44° clockwise rotation of the upper nappe at Pignola. These results suggest that the doubled nappe structures, sampled some 50 km apart, resulted from their emplacement by translation with little rotation prior to the opening of the Tyrrhenian Sea and that it was the opening of this Sea that caused the predominantly anticlockwise rotation. This work therefore indicates the way in which palaeomagnetic analyses can be used, even within complex allochthonous areas, as an aid to deciphering their tectonic evolution.
Clockwise
Anticline
Cite
Citations (7)