Tectonic evolution of the Japanese Islands as reflected in modal compositions of Cenozoic forearc and backarc sand and sandstone

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doi: 10.1029/91TC03183
Author(s): Marsaglia, Kathleen M.; Ingersoll, Raymond V.; Packer, Bonnie M.
Author Affiliation(s): Primary:
University of Texas at El Paso, Department of Geological Sciences, El Paso, TX, United States
University of California at Los Angeles, United States
Volume Title: Tectonics
Source: Tectonics, 11(5), p.1028-1044. Publisher: American Geophysical Union, Washington, DC, United States. ISSN: 0278-7407 CODEN: TCTNDM
Note: In English. 75 refs.; illus. incl. 3 tables, sketch maps
Summary: Cenozoic tectonic evolution of the Japanese rifted continental arc-trench system is reflected in the detrital modes of sand and sandstone deposited in forearc and backarc basins sampled by the Deep Sea Drilling Project. At present, the Japan arc is divided into two segments along a complex plate boundary where the Izu-Bonin Ridge intersects the Japan arc, creating two triple junctions, in front of and behind the ridge. Southwest of the Izu-Bonin Ridge, quartzofeldspathic Cretaceous forearc sediments were uplifted and recycled into Tertiary forearc deposits in response to strike-slip movement associated with backarc spreading in the Shikoku basin. Quaternary forearc sections record the first major influx of volcanic detritus to southwest Japan sites. Triple-junction-related deformation in central Honshu has produced sand of mixed volcanic/sedimentary provenance, which is funneled by the Suruga Canyon into the Nankai Trough along the southwest Japan margin. North of the triple junction, Oligo-Miocene forearc sand compositions indicate Oligocene forearc uplift and volcanism, possibly related to initial backarc rifting and formation of the Japan Sea, and subsequent Miocene exposure of arc basement. In contrast, Pliocene and Quaternary forearc sand from northeast Japan is primarily volcaniclastic and documents uninterrupted arc volcanism. Within the backarc region, sand compositions vary from east to west across the Japan Sea. The Asian rifted continental margin and submerged remnants shed quartzofeldspathic sand into the western side of the basin, whereas the Japan arc sheds volcaniclastic sand into the eastern side of the basin. Copyright 1992 by the American Geophysical Union.
Year of Publication: 1992
Research Program: DSDP Deep Sea Drilling Project
IPOD International Phase of Ocean Drilling
Key Words: 06 Petrology, Sedimentary; 18 Geophysics, Solid-Earth; Asia; Back-arc basins; Basins; Cenozoic; Clastic rocks; Clastic sediments; Composition; DSDP Site 297; DSDP Site 298; DSDP Site 582; DSDP Site 583; Deep Sea Drilling Project; Deformation; Drainage; Evolution; Far East; Faults; Fore-arc basins; Honshu; IPOD; Izu-Bonin Arc; Japan; Leg 31; Leg 87; Nankai Trough; North Pacific; Northwest Pacific; Pacific Ocean; Paleogeography; Petrography; Provenance; Reconstruction; Sand; Sandstone; Sea-floor spreading; Sedimentary rocks; Sediments; Shikoku Basin; Strike-slip faults; Tectonics; Triple junctions; Volcaniclastics; West Pacific
Coordinates: N305222 N305222 E1340953 E1340953
N314255 N314256 E1333614 E1333613
N314730 N314730 E1335448 E1335448
N314945 N315008 E1335133 E1335115
Record ID: 1993024920
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