Melanges through time: Life cycle of the world's largest Archean melange compared with Mesozoic and Paleozoic subduction-accretion-collision melanges

Kusky, Timothy
Wang, Junpeng
Wang, Lu
Huang, Bo
Ning, Wenbin
Fu, Dong
Peng, Hongtao
Deng, Hao
Polat, Ali
Zhong, Yating
Shi, Guanzhong
Melanges represent a significant component of collisional and accretionary orogenic belts. We present a comparison of subduction-accretion melanges of different ages to test how melange-forming processes at convergent margins changed through time. We describe the Mesozoic McHugh melange in Alaska, and the Paleozoic Proto-Tethyan Laohushan melange of the Qilian Orogenic Belt of the Alpine-Himalayan chain, together with documentation of a Neoarchean melange that marks the suture between the Eastern Block and Central Orogenic Belt of the North China Craton (NCC). The McHugh is a classic accretionary melange that has not yet experienced a collision, and the Laohushan is an accretionary/collisional melange with structures related to both stages of its evolution. We compare the characteristics of these melanges with the world's largest Archean melange, the newly-documented circa 2.5 Ga 1600 km long Jianping-Zunhua-Zanhuang-Dengfeng (JZZD) melange of the North China Craton.


Planar seismic source characterization models developed for probabilistic seismic hazard assessment of Istanbul
Gülerce, Zeynep; Guner, Baris; Kaymakcı, Nuretdin (Copernicus GmbH, 2017-12-22)
This contribution provides an updated planar seismic source characterization (SSC) model to be used in the probabilistic seismic hazard assessment (PSHA) for Istanbul. It defines planar rupture systems for the four main segments of the North Anatolian fault zone (NAFZ) that are critical for the PSHA of Istanbul: segments covering the rupture zones of the 1999 Kocaeli and Duzce earthquakes, central Marmara, and Ganos/Saros segments. In each rupture system, the source geometry is defined in terms of fault len...
Evaluation of the NDVI in plant community composition mapping: a case study of Tersakan Valley, Amasya County, Turkey
DOĞAN, Hakan Mete; Celep, Ferhat; Karaer, Fergan (Informa UK Limited, 2009-01-01)
Mapping the composition of plant community types requires reliable spatial data obtained from field surveys and satellite-derived indices. The normalized difference vegetation index (NDVI) is the simplest and most frequently used index in plant applications. If relationships between the NDVI and plant cover abundance are determined, this information can be used in the mapping process. In this study, we investigated these possible connections for mapping the plant community composition of Tersakan Valley in ...
Uniform and nonuniform V-shaped planar arrays for 2-D direction-of-arrival estimation
Filik, T.; Tuncer, Temel Engin (American Geophysical Union (AGU), 2009-09-22)
In this paper, isotropic and directional uniform and nonuniform V-shaped arrays are considered for azimuth and elevation direction-of-arrival (DOA) angle estimation simultaneously. It is shown that the uniform isotropic V-shaped arrays (UI V arrays) have no angle coupling between the azimuth and elevation DOA. The design of the UI V arrays is investigated, and closed form expressions are presented for the parameters of the UI V arrays and nonuniform V arrays. These expressions allow one to find the isotropi...
Geometric correction accuracy of IRS-1D PAN imagery using topographic map versus GPS control points
Turker, M; Gacemer, AO (Informa UK Limited, 2004-03-01)
Geometric correction accuracy of IRS-1D panchromatic imagery was investigated using GPS- and 1 : 25 000 scale topographic map-derived control points. The differentially corrected GPS-derived coordinates provided markedly more accurate results than did uncorrected handheld GPS- and map-derived GCPs. The rms error value of differentially corrected GPS-derived control points based on second-degree polynomial was in the order of +/-3 m. Geometric corrections made with second-degree polynomials, using both the m...
Evaluation of cross-track illumination in EO-1 Hyperion imagery for lithological mapping
San, B. Taner; Süzen, Mehmet Lütfi (Informa UK Limited, 2011-01-01)
Hyperspectral remote sensing data is a powerful tool for discriminating lithological units and for the preparation of mineral maps for alteration studies. The spaceborne hyperspectral Hyperion sensor, despite its narrow swath width (similar to 7.5 km), possesses great potential with its 196 channels within the wavelength range 426.82-2395.50 nm. Although it has many advantages such as low cost and on-demand coverage, much uncertainty exists in the utility of its applications. For example, poor signal-to-noi...
Citation Formats
T. Kusky et al., “Melanges through time: Life cycle of the world’s largest Archean melange compared with Mesozoic and Paleozoic subduction-accretion-collision melanges,” EARTH-SCIENCE REVIEWS, pp. 0–0, 2020, Accessed: 00, 2020. [Online]. Available: