Deep sea diapirs and bottom simulating reflector in Fairway Basin (SW Pacific)

被引：17

作者：

Auzende, JM

Van de Beuque, S

Dickens, G

François, C

Lavoy, Y

Voutay, O

Exon, N

机构：

[1] IFREMER, Noumea, New Caledonia

[2] Australian Geol Survey Org, IFREMER, Canberra, ACT 2601, Australia

[3] James Cook Univ N Queensland, Townsville, Qld 4811, Australia

[4] Serv Methodes Adm & Informat, Noumea, New Caledonia

[5] Serv Mines & Energie, Noumea, New Caledonia

来源：

MARINE GEOPHYSICAL RESEARCHES | 2000年 / 21卷 / 06期

关键词：

BSR; Fairway Basin; salt domes; Swath-Mapping; SW pacific; seismic;

D O I：

10.1023/A:1004848715044

中图分类号：

P3 [地球物理学]; P59 [地球化学];

学科分类号：

0708 ; 070902 ;

摘要：

A recent swath-bathymetry and geophysical survey of the R/V L'Atalante in the Fairway Basin between Australia and New Caledonia allowed to confirm the Cretaceous age of the creation of the basin by continental stretching. This first stage of opening of the Fairway Basin is associated with the deposition of a continuous salt/mud layer feeding today numerous diapirs, some of them piercing the 3 to 4 km thick sedimentary cover and reaching the seafloor. In close link with this salt/mud layer a Bottom Simulating Reflector indicator of gas hydrates level occupies a 70 000 km(2) surface at about 500 to 600 m-depth beneath the sea floor. The coexistence of both BSR and diapirs suggests a thermogenic better than biogenic origin for the gas hydrates horizon.

引用

页码：579 / 587

页数：9

共 33 条

[1] Origin of the New Caledonian ophiolites based on a French-Australian seismic transect [J].