New age, petrochemical and structural data indicate that the Banda Terrane is a remnant of a Jurassic to Eocene arc–trench system that formed the eastern part of the Great Indonesian arc. The arc system rifted apart during Eocene to Miocene supra-subduction zone sea floor spreading, which dispersed ridges of Banda Terrane embedded in young oceanic crust as far south as Sumba and Timor. In Timor...

Recent field and geochronological investigations. in conjunction with LITHOPROBE seismic surveys, have led to the recognition of crust&scale, low to moderate-angle, Eocene extensional faults and shear ZOIIL‘S in the southern Omineca Belt. The present study focuses on documentation of the Eagle River fault, an extensional shear zone that delineates the western boundary of the Shuswap metamorphic...

Thermal history and apatite fission-track ages were determined for the Kaleybar, Razgah and Bozqush alkaline intrusions which display Eocene-Oligocene stratigraphic age. These subduction-related intrusions are located in the Alborz-Azarbaijan magmatic belt which is characterized by a Paleogene magmatic flare-up associated with extensional/transtensional tectonism. The mean of Uranium content an...

[1] Uppermost Cretaceous to Eocene marine sedimentary sequences occur both to the south and north of the Yarlung Zangbo suture in south central Tibet. They consist of Indian-margin strata of the northern Tethyan Himalaya and Asian-margin strata of the Gangdese forearc. Both assemblages are characterized by major changes in depositional environment and sedimentary provenance at 65 Ma and an appe...

Since the acceptance of plate tectonics, presence calc-alkaline magmatic rocks has been recognized as evidence subduction. But under specific geodynamic circumstances, subduction may occur without generating magmas. Here, we investigate Cenozoic northern Lesser Antilles arc where, from sparsely exposed records, Eocene?Oligocene and Pliocene flare-ups a Miocene lull were postulated. Nevertheless...

The Southern Rhodope Core Complex is a wide metamorphic dome exhumed in the northern Aegean as a result of large-scale extension from mid-Eocene to mid-Miocene times. Its roughly triangular shape is bordered on the SW by the Jurassic and Cretaceous metamorphic units of the Serbo-Macedonian in the Chalkidiki peninsula and on the N by the eclogite bearing gneisses of the Sideroneron massif. The m...

Clowes et al. presented an informative article on the results of seismic reflection experiments conducted along four lines for LITHOPROBE on southern Vancouver Island. The various reflections indicated in the profiles, which are distributed as deep as the Mohorovicic discontinuity, formed the basis for proposing various scenarios for the tectonic development of the crust. Two of these hypothese...