2 research outputs found
ΠΠ΅ΡΡ Π½Π΅ΠΌΠ΅Π»ΠΎΠ²ΡΠ΅ ΡΠΈΠΎΠ»ΠΈΡΠΎΠ²ΡΠ΅ ΠΏΠ΅ΠΏΠ»Ρ ΠΠ΅ΡΠ΅Π²ΡΠ½Π½ΡΡ ΠΠΎΡ (ΠΎΡΡΡΠΎΠ² ΠΠΎΠ²Π°Ρ Π‘ΠΈΠ±ΠΈΡΡ, ΠΠΎΠ²ΠΎΡΠΈΠ±ΠΈΡΡΠΊΠΈΠ΅ ΠΎΡΡΡΠΎΠ²Π°)
The article is concerned with the first finds of rhyolite ashes in Upper Cretaceous sediments of Novaya Sibir Island. In the course of the field work in the area of cape Utes Derevyannykh Gor in 2016, four layers of unlithified fine-grained ashes were found in the Turonian-Coniacian coal-bearing Derevyannye Gory Formation. The article presents the results of petrographic, X-ray diffractometric and microprobe analysis of pyroclastics from ash layers. A typification of volcanogenic-terrigenous deposits is proposed. Thin section of the samples were investigated on a polarizing microscope. X-ray phase analysis of the clay fraction was carried out using a DRON-3 diffractometer. X-ray microanalysis of vitroclasts were carried out on a scanning electron microscope βJeol JSM-6480LVβ with the microprobe analyzer βOxford Instruments INCA-Energy 350β. It was established that Derevyannye Gory Formation is composed of rhyolitic tuffites, among which fine-grained crystal-vitroclastic and vitroclastic ashes of low and normal alkaline high-potassium rhyolites with thickness up to 2.5 m. Low pyroclastics sediments are not widespread. New data on the structure and composition of the Derevyannye Gory Formation confirm the hypothesis of previous researchers, that sedimentation in the Late Cretaceous in the area of Novaya Sibir Island was accompanied by explosive acidic volcanism. The main purpose of the article is to discuss the sources of pyroclastic material for the territory of the New Siberian Islands in the Turonian-Coniacian age. The conclusion is made about the territorial proximity of the paleovolcanic eruption center to the area of sedimentation. It is assumed that the paleovolcanic centers were located within the present territory of Kotelny, Zemlya Bunge, Faddeevsky islands and, probably, were inherited from the Early Albian stage.Π‘ΡΠ°ΡΡΡ ΠΏΠΎΡΠ²ΡΡΠ΅Π½Π° ΠΏΠ΅ΡΠ²ΡΠΌ Π½Π°Ρ
ΠΎΠ΄ΠΊΠ°ΠΌ ΡΠΈΠΎΠ»ΠΈΡΠΎΠ²ΡΡ
ΠΏΠ΅ΠΏΠ»ΠΎΠ² Π² Π²Π΅ΡΡ
Π½Π΅ΠΌΠ΅Π»ΠΎΠ²ΡΡ
ΠΎΡΠ»ΠΎΠΆΠ΅Π½ΠΈΡΡ
ΠΎ. ΠΠΎΠ²Π°Ρ Π‘ΠΈΠ±ΠΈΡΡ. Π Ρ
ΠΎΠ΄Π΅ ΠΏΠΎΠ»Π΅Π²ΡΡ
ΡΠ°Π±ΠΎΡ 2016 Π³. Π² ΡΠ°ΠΉΠΎΠ½Π΅ ΠΌΡΡΠ° Π£ΡΠ΅Ρ ΠΠ΅ΡΠ΅Π²ΡΠ½Π½ΡΡ
ΠΠΎΡ Π±ΡΠ»ΠΎ Π²ΡΡΠ²Π»Π΅Π½ΠΎ ΡΠ΅ΡΡΡΠ΅ ΡΠ»ΠΎΡ ΡΠΎΠ½ΠΊΠΎΠ·Π΅ΡΠ½ΠΈΡΡΡΡ
Π½Π΅Π»ΠΈΡΠΈΡΠΈΡΠΈΡΠΎΠ²Π°Π½Π½ΡΡ
ΠΏΠ΅ΠΏΠ»ΠΎΠ² Π² ΡΠΎΡΡΠ°Π²Π΅ ΡΡΡΠΎΠ½-ΠΊΠΎΠ½ΡΡΠΊΡΠΊΠΎΠΉ ΡΠ³Π»Π΅Π½ΠΎΡΠ½ΠΎΠΉ Π΄Π΅ΡΠ΅Π²ΡΠ½Π½ΠΎΠ³ΠΎΡΡΠΊΠΎΠΉ ΡΠ²ΠΈΡΡ. Π ΡΡΠ°ΡΡΠ΅ ΠΏΡΠ΅Π΄ΡΡΠ°Π²Π»Π΅Π½Ρ ΡΠ΅Π·ΡΠ»ΡΡΠ°ΡΡ ΠΏΠ΅ΡΡΠΎΠ³ΡΠ°ΡΠΈΡΠ΅ΡΠΊΠΎΠ³ΠΎ, ΡΠ΅Π½ΡΠ³Π΅Π½-Π΄ΠΈΡΡΠ°ΠΊΡΠΎΠΌΠ΅ΡΡΠΈΡΠ΅ΡΠΊΠΎΠ³ΠΎ ΠΈ ΠΌΠΈΠΊΡΠΎΠ·ΠΎΠ½Π΄ΠΎΠ²ΠΎΠ³ΠΎ Π°Π½Π°Π»ΠΈΠ·Π° ΠΏΠΈΡΠΎΠΊΠ»Π°ΡΡΠΈΠΊΠΈ ΠΈΠ· ΠΏΠ΅ΠΏΠ»ΠΎΠ²ΡΡ
ΡΠ»ΠΎΠ΅Π². ΠΡΠ΅Π΄Π»ΠΎΠΆΠ΅Π½Π° ΡΠΈΠΏΠΈΠ·Π°ΡΠΈΡ Π²ΡΠ»ΠΊΠ°Π½ΠΎΠ³Π΅Π½Π½ΠΎ-ΡΠ΅ΡΡΠΈΠ³Π΅Π½Π½ΡΡ
ΠΎΡΠ»ΠΎΠΆΠ΅Π½ΠΈΠΉ. ΠΠ±ΡΠ°Π·ΡΡ ΠΈΡΡΠ»Π΅Π΄ΠΎΠ²Π°Π½Ρ Π² ΠΏΡΠΎΠ·ΡΠ°ΡΠ½ΡΡ
ΡΠ»ΠΈΡΠ°Ρ
ΠΏΡΠΈ ΠΏΠΎΠΌΠΎΡΠΈ ΠΏΠΎΠ»ΡΡΠΈΠ·Π°ΡΠΈΠΎΠ½Π½ΠΎΠ³ΠΎ ΠΌΠΈΠΊΡΠΎΡΠΊΠΎΠΏΠ°. Π Π΅Π½ΡΠ³Π΅Π½ΠΎΡΠ°Π·ΠΎΠ²ΡΠΉ Π°Π½Π°Π»ΠΈΠ· Π³Π»ΠΈΠ½ΠΈΡΡΠΎΠΉ ΡΡΠ°ΠΊΡΠΈΠΈ ΠΏΡΠΎΠ²ΠΎΠ΄ΠΈΠ»ΡΡ Ρ ΠΏΠΎΠΌΠΎΡΡΡ ΡΠ΅Π½ΡΠ³Π΅Π½ΠΎΠ²ΡΠΊΠΎΠ³ΠΎ Π΄ΠΈΡΡΠ°ΠΊΡΠΎΠΌΠ΅ΡΡΠ° ΠΠ ΠΠ-3. ΠΠΈΠΊΡΠΎΡΠ΅Π½ΡΠ³Π΅Π½ΠΎΡΠΏΠ΅ΠΊΡΡΠ°Π»ΡΠ½ΡΠ΅ Ρ
ΠΈΠΌΠΈΡΠ΅ΡΠΊΠΈΠ΅ Π°Π½Π°Π»ΠΈΠ·Ρ Π²ΠΈΡΡΠΎΠΊΠ»Π°ΡΡΠΎΠ² Π²ΡΠΏΠΎΠ»Π½Π΅Π½Ρ Π½Π° ΡΠΊΠ°Π½ΠΈΡΡΡΡΠ΅ΠΌ ΡΠ»Π΅ΠΊΡΡΠΎΠ½Π½ΠΎΠΌ ΠΌΠΈΠΊΡΠΎΡΠΊΠΎΠΏΠ΅ Jeol JSM-6480LV Ρ ΠΌΠΈΠΊΡΠΎΠ°Π½Π°Π»ΠΈΠ·Π°ΡΠΎΡΠΎΠΌ Oxford Instruments INCA-Energy 350. Π£ΡΡΠ°Π½ΠΎΠ²Π»Π΅Π½ΠΎ, ΡΡΠΎ Π΄Π΅ΡΠ΅Π²ΡΠ½Π½ΠΎΠ³ΠΎΡΡΠΊΠ°Ρ ΡΠ²ΠΈΡΠ° ΡΠ»ΠΎΠΆΠ΅Π½Π° ΡΠΈΠΎΠ»ΠΈΡΠΎΠ²ΡΠΌΠΈ ΡΡΡΡΠΈΡΠ°ΠΌΠΈ, ΡΡΠ΅Π΄ΠΈ ΠΊΠΎΡΠΎΡΡΡ
Π·Π°Π»Π΅Π³Π°ΡΡ ΡΠΎΠ½ΠΊΠΎΠ·Π΅ΡΠ½ΠΈΡΡΡΠ΅ ΠΊΡΠΈΡΡΠ°Π»Π»ΠΎ-Π²ΠΈΡΡΠΎΠΊΠ»Π°ΡΡΠΈΡΠ΅ΡΠΊΠΈΠ΅ ΠΈ Π²ΠΈΡΡΠΎΠΊΠ»Π°ΡΡΠΈΡΠ΅ΡΠΊΠΈΠ΅ ΠΏΠ΅ΠΏΠ»Ρ Π½ΠΈΠ·ΠΊΠΎΠΈ Π½ΠΎΡΠΌΠ°Π»ΡΠ½ΠΎΡΠ΅Π»ΠΎΡΠ½ΡΡ
Π²ΡΡΠΎΠΊΠΎΠΊΠ°Π»ΠΈΠ΅Π²ΡΡ
ΡΠΈΠΎΠ»ΠΈΡΠΎΠ² ΠΌΠΎΡΠ½ΠΎΡΡΡΡ Π΄ΠΎ 2,5 ΠΌ. ΠΡΠ»ΠΎΠΆΠ΅Π½ΠΈΡ Ρ Π½ΠΈΠ·ΠΊΠΈΠΌ ΡΠΎΠ΄Π΅ΡΠΆΠ°Π½ΠΈΠ΅ΠΌ ΠΏΠΈΡΠΎΠΊΠ»Π°ΡΡΠΈΠΊΠΈ ΡΠ°ΡΠΏΡΠΎΡΡΡΠ°Π½Π΅Π½Ρ Π½Π΅Π·Π½Π°ΡΠΈΡΠ΅Π»ΡΠ½ΠΎ. ΠΠΎΠ²ΡΠ΅ Π΄Π°Π½Π½ΡΠ΅ ΠΎ ΡΡΡΠΎΠ΅Π½ΠΈΠΈ ΠΈ ΡΠΎΡΡΠ°Π²Π΅ Π΄Π΅ΡΠ΅Π²ΡΠ½Π½ΠΎΠ³ΠΎΡΡΠΊΠΎΠΉ ΡΠ²ΠΈΡΡ ΠΏΠΎΠ΄ΡΠ²Π΅ΡΠΆΠ΄Π°ΡΡ Π³ΠΈΠΏΠΎΡΠ΅Π·Ρ ΠΏΡΠ΅Π΄ΡΠ΄ΡΡΠΈΡ
ΠΈΡΡΠ»Π΅Π΄ΠΎΠ²Π°ΡΠ΅Π»Π΅ΠΉ ΠΎ ΡΠΎΠΌ, ΡΡΠΎ ΠΎΡΠ°Π΄ΠΊΠΎΠ½Π°ΠΊΠΎΠΏΠ»Π΅Π½ΠΈΠ΅ Π² ΡΠ°ΠΉΠΎΠ½Π΅ ΠΎ. ΠΠΎΠ²Π°Ρ Π‘ΠΈΠ±ΠΈΡΡ Π² ΠΏΠΎΠ·Π΄Π½Π΅ΠΌ ΠΌΠ΅Π»Ρ ΡΠΎΠΏΡΠΎΠ²ΠΎΠΆΠ΄Π°Π»ΠΎΡΡ ΡΠΊΡΠΏΠ»ΠΎΠ·ΠΈΠ²Π½ΡΠΌ ΠΊΠΈΡΠ»ΡΠΌ Π²ΡΠ»ΠΊΠ°Π½ΠΈΠ·ΠΌΠΎΠΌ. ΠΡΠ½ΠΎΠ²Π½ΠΎΠΉ ΡΠ΅Π»ΡΡ ΡΡΠ°ΡΡΠΈ ΡΠ²Π»ΡΠ΅ΡΡΡ ΠΎΠ±ΡΡΠΆΠ΄Π΅Π½ΠΈΠ΅ ΠΈΡΡΠΎΡΠ½ΠΈΠΊΠΎΠ² ΠΏΠΈΡΠΎΠΊΠ»Π°ΡΡΠΈΡΠ΅ΡΠΊΠΎΠ³ΠΎ ΠΌΠ°ΡΠ΅ΡΠΈΠ°Π»Π° Π½Π° ΡΠ΅ΡΡΠΈΡΠΎΡΠΈΠΈ ΠΠΎΠ²ΠΎΡΠΈΠ±ΠΈΡΡΠΊΠΈΡ
ΠΎΡΡΡΠΎΠ²ΠΎΠ² Π² ΡΡΡΠΎΠ½-ΠΊΠΎΠ½ΡΡΠΊΡΠΊΠΎΠ΅ Π²ΡΠ΅ΠΌΡ. Π‘Π΄Π΅Π»Π°Π½ Π²ΡΠ²ΠΎΠ΄ ΠΎ ΡΠ΅ΡΡΠΈΡΠΎΡΠΈΠ°Π»ΡΠ½ΠΎΠΉ Π±Π»ΠΈΠ·ΠΎΡΡΠΈ ΠΏΠ°Π»Π΅ΠΎΠ²ΡΠ»ΠΊΠ°Π½ΠΈΡΠ΅ΡΠΊΠΎΠ³ΠΎ ΡΠ΅Π½ΡΡΠ° ΠΈΠ·Π²Π΅ΡΠΆΠ΅Π½ΠΈΠΉ ΠΊ ΠΎΠ±Π»Π°ΡΡΠΈ ΠΎΡΠ°Π΄ΠΊΠΎΠ½Π°ΠΊΠΎΠΏΠ»Π΅Π½ΠΈΡ. ΠΡΠ΅Π΄ΠΏΠΎΠ»ΠΎΠΆΠ΅Π½ΠΎ, ΡΡΠΎ ΠΏΠ°Π»Π΅ΠΎΠ²ΡΠ»ΠΊΠ°Π½ΠΈΡΠ΅ΡΠΊΠΈΠ΅ ΡΠ΅Π½ΡΡΡ Π½Π°Ρ
ΠΎΠ΄ΠΈΠ»ΠΈΡΡ Π² ΠΏΡΠ΅Π΄Π΅Π»Π°Ρ
ΡΠΎΠ²ΡΠ΅ΠΌΠ΅Π½Π½ΠΎΠΉ ΡΠ΅ΡΡΠΈΡΠΎΡΠΈΠΈ ΠΎΡΡΡΠΎΠ²ΠΎΠ² ΠΠΎΡΠ΅Π»ΡΠ½ΡΠΉ, ΠΠ΅ΠΌΠ»Ρ ΠΡΠ½Π³Π΅, Π€Π°Π΄Π΄Π΅Π΅Π²ΡΠΊΠΈΠΉ ΠΈ, Π²Π΅ΡΠΎΡΡΠ½ΠΎ, Π±ΡΠ»ΠΈ ΡΠ½Π°ΡΠ»Π΅Π΄ΠΎΠ²Π°Π½Ρ Ρ ΡΠ°Π½Π½Π΅Π°Π»ΡΠ±ΡΠΊΠΎΠ³ΠΎ Π²ΡΠ΅ΠΌΠ΅Π½ΠΈ