TY  - GEN
A1  - Terbishalieva, Baiansuluu
A1  - Timmerman, Martin Jan
A1  - Mikolaichuk, Alexander
A1  - Altenberger, Uwe
A1  - Slama, Jiri
A1  - Schleicher, Anja Maria
A1  - Sudo, Masafumi
A1  - Sobel, Edward
A1  - Cichy, Sarah Bettina
T1  - Calc-alkaline volcanic rocks and zircon ages of the late Tonian
BT  - Early Cryogenian arc-related Big Naryn Complex in the Eastern Djetim-Too Range, Middle Tianshan block, Kyrgyzstan
T2  - Zweitveröffentlichungen der Universität Potsdam : Mathematisch-Naturwissenschaftliche Reihe
N2  - The Big Naryn Complex (BNC) in the East Djetim-Too Range of the Kyrgyz Middle Tianshan block is a tectonized, at least 2 km thick sequence of predominantly felsic to intermediate volcanic rocks intruded by porphyric rhyolite sills. It overlies a basement of metamorphic rocks and is overlain by late Neoproterozoic Djetim-Too Formation sediments; these also occur as tectonic intercalations in the BNC. The up to ca. 1100 m thick Lower Member is composed of predominantly rhyolites-to-dacites and minor basalts, while the at least 900 m thick pyroclastic Upper Member is dominated by rhyolitic-to-dacitic ignimbrites. Porphyric rhyolite sills are concentrated at the top of the Lower Member. A Lower Member rhyolite and a sill sample have LA-ICP-MS U-Pb zircon crystallization ages of 726.1 +/- 2.2 Ma and 720.3 +/- 6.5 Ma, respectively, showing that most of the magmatism occurred within a short time span in the late Tonian-early Cryogenian. Inherited zircons in the sill sample have Neoarchean (2.63, 2.64 Ga), Paleo- (2.33-1.81 Ga), Meso- (1.55 Ga), and Neoproterozoic (ca. 815 Ma) ages, and were derived from a heterogeneous Kuilyu Complex basement. A 1751 +/- 7 Ma Ar-40/Ar-39 age for amphibole from metagabbro is the age of cooling subsequent to Paleoproterozoic metamorphism of the Kuilyu Complex. The large amount of pyroclastic rocks, and their major and trace element compositions, the presence of Neoarchean to Neoproterozoic inherited zircons and a depositional basement of metamorphic rocks point to formation of the BNC in a continental magmatic arc setting.
T3  - Zweitveröffentlichungen der Universität Potsdam : Mathematisch-Naturwissenschaftliche Reihe - 1361 
KW  - Tianshan orogenic belt
KW  - Big Naryn complex
KW  - Tonian–Cryogenian
KW  - magmatic arc
KW  - calc-alkaline
KW  - Kuilyu complex
Y1  - 2021
U6  - http://nbn-resolving.de/urn/resolver.pl?urn:nbn:de:kobv:517-opus4-569585
SN  - 1437-3254
SN  - 1437-3262
SN  - 1866-8372
IS  - 1
ER  - 
TY  - GEN
A1  - Schuck, Bernhard
A1  - Schleicher, Anja Maria
A1  - Janssen, Christoph
A1  - Toy, Virginia G.
A1  - Dresen, Georg
T1  - Fault zone architecture of a large plate-bounding strike-slip fault
BT  - A case study from the Alpine Fault, New Zealand
T2  - Zweitveröffentlichungen der Universität Potsdam : Mathematisch-Naturwissenschaftliche Reihe
N2  - New Zealand's Alpine Fault is a large, platebounding strike-slip fault, which ruptures in large (M-w > 8) earthquakes. We conducted field and laboratory analyses of fault rocks to assess its fault zone architecture. Results reveal that the Alpine Fault Zone has a complex geometry, comprising an anastomosing network of multiple slip planes that have accommodated different amounts of displacement. This contrasts with the previous perception of the Alpine Fault Zone, which assumes a single principal slip zone accommodated all displacement. This interpretation is supported by results of drilling projects and geophysical investigations. Furthermore, observations presented here show that the young, largely unconsolidated sediments that constitute the footwall at shallow depths have a significant influence on fault gouge rheological properties and structure.
T3  - Zweitveröffentlichungen der Universität Potsdam : Mathematisch-Naturwissenschaftliche Reihe - 1428 
KW  - san andreas fault
KW  - thickness-displacement relationships
KW  - central south island
KW  - Ion-Beam (FIB)
KW  - internal structure
KW  - hanging wall
KW  - Fluid Flow
KW  - frictional properties
KW  - weakening mechanisms
KW  - strain localization
Y1  - 2020
U6  - http://nbn-resolving.de/urn/resolver.pl?urn:nbn:de:kobv:517-opus4-512441
SN  - 1866-8372
IS  - 1
ER  -