Structural asymmetry of the TAG rift valley: Evidence from a near-bottom survey for episodic spreading

被引：22

作者：

Kleinrock, MC ^{[1
]}

Humphris, SE ^{[1
]}

机构：

[1] WOODS HOLE OCEANOG INST,DEPT GEOL & GEOPHYS,WOODS HOLE,MA 02543

来源：

GEOPHYSICAL RESEARCH LETTERS | 1996年 / 23卷 / 23期

关键词：

D O I：

10.1029/96GL03073

中图分类号：

P [天文学、地球科学];

学科分类号：

07 ;

摘要：

Comprehensive high-resolution sidescan sonar imagery, swath bathymetry, and photographic data from the TAG rift valley (Mid-Atlantic Ridge, 26 degrees N) suggest significant asymmetry in crustal accretion. Discontinuities and asymmetry in structural and volcanic morphology and age distribution about the spreading axis suggest a recent episode of preferential accretion of crust to the east throughout the central 10 km of this spreading segment. Such episodes may contribute to the long-term spreading asymmetry in the area.

引用

页码：3439 / 3442

页数：4

共 21 条

[1]

BALLARD RD, 1977, GEOL SOC AM BULL, V88, P507, DOI 10.1130/0016-7606(1977)88<507:MATOTI>2.0.CO

[2]

[3] GEOLOGIC CONTROLS OF HYDROTHERMAL ACTIVITY IN THE MID-ATLANTIC RIDGE RIFT-VALLEY - TECTONICS AND VOLCANICS [J].

EBERHART, GL ;

RONA, PA ;

HONNOREZ, J .

MARINE GEOPHYSICAL RESEARCH, 1988, 10 (3-4) :233-259

[4]

KARSON JA, 1990, GEOL SOC AM BULL, V102, P1635, DOI 10.1130/0016-7606(1990)102<1635:BTTFAS>2.3.CO

[5]

[6]

KARSON JA, 1992, OPHIOLITES THEIR MOD, P107

[7] Structural control on seafloor hydrothermal activity at the TAG active mound [J].

Kleinrock, MC ;

Humphris, SE .

NATURE, 1996, 382 (6587) :149-153

[8]

KLEINROCK MC, 1996, P OCEAN DRILLING PRO, V158, P15

[9]

KLEINROCK MC, 1992, CRC HDB GEOPHYSICAL, P35

[10] MICROEARTHQUAKE CHARACTERISTICS OF A MIDOCEAN RIDGE ALONG-AXIS HIGH [J].

KONG, LSL ;

SOLOMON, SC ;

PURDY, GM .

JOURNAL OF GEOPHYSICAL RESEARCH-SOLID EARTH, 1992, 97 (B2) :1659-1685

← 1 2 3 →