Author(s)

Jordan Wofsy

Affiliation(s)

Department of Earth and Planetary Sciences, Harvard University, Cambridge, Massachusetts, USA.

Corresponding Author

Jordan Wofsy

ABSTRACT

Opening and closing tectonics is a new hypothesis that studies the opening and closing movement of the earth and its tectonic characteristics, analyzes the formation mechanism of the opening and closing tectonic system, and explores the origin and evolution of the earth. Opening and closing structures at different spatial and temporal scales have different geological manifestations and require research from different angles. Taking the giant open-closed tectonic area in Asia, Europe and Africa, the large-scale open-closed tectonic area in the Mediterranean, and the medium-sized open-closed tectonic area in East Dabie as examples, the application of the open-closed tectonic theory in geotectonic zoning, seismic activity, and interpretation of modern geodetic survey results was studied. applications. Research shows that: (1) Based on the perspective of open-closed tectonics, the giant open-closed structures in the Asia-Europe-Africa neighborhood can be divided into the Russian tectonic cluster, the African tectonic cluster, the North Asian tectonic cluster, the Central Asian tectonic cluster, the South Asian tectonic cluster and the East Asian tectonic cluster; (2) Strong seismic activity in Asia, Europe and Africa is closely related to the Cenozoic opening and closing tectonic transition zones between tectonic clusters; (3) Seismic profiles and focal mechanisms in the large opening and closing tectonic areas of the Mediterranean reveal the Mediterranean-Turkey-Iran — The current tectonic movement in the Afghan tectonic transition zone is mainly coalescence; (4) The ground tilt and ground strain, peripheral GNSS and flowing gravity observations of Shizishan, Huangmei, Macheng and other stations around the East Dabie medium-sized opening and closing structure reveal that It is found that there is a trend transition from "closing" to "opening" with short time scale and weak magnitude around this area. The opening and closing movement is a common mechanism for the quasi-synchronous changes in the trends of many recent observation data.

KEYWORDS

Geotectonic division; Opening and closing structures; Earthquakes; Crustal deformation observation; Dabie orogenic belt

CITE THIS PAPER

Jordan Wofsy. Geophysical manifestations of opening and closing structures at different spatial and temporal scales. Academic Journal of Earth Sciences. 2024, 2(2): 13-20. DOI: 10.61784/ajesv2n272.

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