Catalogo Articoli (Spogli Riviste)

OPAC HELP

Titolo:
MELANGE-FORMING PROCESSES IN THE DEVELOPMENT OF ACCRETIONARY PRISM - EVIDENCE FROM FISSION-TRACK THERMOCHRONOLOGY
Autore:
HASEBE N; TAGAMI T; NISHIMURA S;
Indirizzi:
KANAZAWA UNIV,GRAD SCH NAT SCI & TECHNOL,DIV PHYS SCI,DEPT SCI NAT ENVIRONM KANAZAWA ISHIKAWA 92011 JAPAN KYOTO UNIV,GRAD SCH SCI,DIV EARTH & PLANETARY SCI KYOTO 606 JAPAN KINKI CHIHO HATSUMEI CTR,KYOTO INST NAT HIST KYOTO 606 JAPAN
Titolo Testata:
JOURNAL OF GEOPHYSICAL RESEARCH-SOLID EARTH
fascicolo: B4, volume: 102, anno: 1997,
pagine: 7659 - 7672
SICI:
2169-9313(1997)102:B4<7659:MPITDO>2.0.ZU;2-C
Fonte:
ISI
Lingua:
ENG
Soggetto:
BARBADOS RIDGE; SOUTHWEST JAPAN; MUD VOLCANOS; FLUID MIGRATION; SHIMANTO BELT; HEAT-FLOW; COMPLEX; ZIRCON; CALIBRATION; DISTRIBUTIONS;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Science Citation Index Expanded
Citazioni:
78
Recensione:
Indirizzi per estratti:
Citazione:
N. Hasebe et al., "MELANGE-FORMING PROCESSES IN THE DEVELOPMENT OF ACCRETIONARY PRISM - EVIDENCE FROM FISSION-TRACK THERMOCHRONOLOGY", J GEO R-SOL, 102(B4), 1997, pp. 7659-7672

Abstract

To give thermotectonic constraints on melange-forming processes and to understand the significance of melange in the evolution of accretionary complexes, fission track analysis was carried out on samples collected from sandstone blocks in melange matrix and coherent sandstone sequences adjacent to melange units in the Cretaceous to Miocene Shimanto accretionary complex, southwest Japan, which is one of the typical accretionary complexes with an accumulation of geological information. Nineteen zircon ages and 15 track length distributions from melanges indicate with some local variation that materials with higher maximum paleotemperatures are exposed at the rear part of the prism, as is the case of the coherent units. Two apatite ages are contemporaneous with previously reported apatite ages of similar to 10 Ma obtained from coherent units in the region, emphasizing the regional cooling through the apatite closure temperature of similar to 100 degrees C at that time. There is no evidence for substantial relative motion of the melangeswith respect to the surrounding coherent units; melange formation is explained by processes that exclude large vertical transport (i.e., 5 km) of melange forming materials. These thermotectonic characteristicsobserved in the Shimanto accretionary complex are maintained during subsequent local internal deformation caused by the successive growth of the wedge.

ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 26/09/20 alle ore 11:03:28