Akademik Veri Yönetim Sistemi
Yerbilimleri/ Earth Sciences, cilt.28, sa.2, ss.113-126, 2007 (Scopus)
The study area is located approximately 16 km SE of Sulucaova village in Çamardi (Niǧde), to the west the Eastern Taurides and is observed within the Siyah Aladaǧ nappe. The investigated area is bounded by the sinistral Ecemiş fault to the west, the ophiolitic melange of the Beyaz Aladaǧ nappe to the south and the Siyah Aladaǧ nappe to the east and north. The Aladaǧ mountains exhibit a nappe structure that occurred during the Late Cretaceous-Paleocene time interval. The tectono-stratigraphic units in the Aladaǧ mountains are called Yahyali, Siyah Aladaǧ, Mineratepeler, Çataloturan, Beyaz Aladaǧ (ophiolitic melange), and Aladaǧ (ophiolite nappe) from bottom to top. Lithologic units of the Siyah Aladaǧ nappe have an age range from Devonian to Late Cretaceous. In the study area, Late Devonian units do not crop out whereas Carboniferous to Late Cretaceous units are common. Carboniferous and Triassic rock units were investigated as the part of the Siyah Aladaǧ nappe. This thrust sheet is tectonically overlain by the Jurassic-Cretaceous Çobandaǧ nappe. The rock units of the Siyah Aladaǧ nappe have two distinct fold-axes in the study area. The first one, that occurred during Late Cretaceous-Early Jurassic, shows a N-S trend. The second one, that occurred during the Late Cretaceous-Paleocene, presents a NE-SW trend, and nappe structure in the region occurred at the same time. These folding affects are seen in the Çobandaǧ nappe. The E-W fold-axes are presently dominant as a result of a N-S compressional regime in the study area. The lithostratigraphy of the Siyah Aladaǧ nappe clearly shows permanent sedimentation until Early-Middle Triassic. At the end of the Middle Triassic, N-S trending fold-axes were developed due to tectonic activity. Late Triassic units are absent in the study area. Due to compressional tectonism during the Late Cretaceous-Paleocene, ductile structures occurred firstly and then the Jurassic-Cretaceous units thrusted over Middle Triassic or older units. The base of the Jurassic units is characterized by a 5-6 m thick brechiated zone that is the indication of a decollement structure of thrust sheet.