CRUSTAL STRUCTURE OF THE CONTINENTAL-SHELF OFF NORTHWEST BRITAIN FROM 2-SHIP SEISMIC EXPERIMENTS

被引：25

作者：

JONES, EJW ^{[1
]}

WHITE, RS ^{[1
]}

HUGHES, VJ ^{[1
]}

MATTHEWS, DH ^{[1
]}

CLAYTON, BR ^{[1
]}

机构：

[1] UNIV CAMBRIDGE,DEPT EARTH SCI,BULLARD LABS,CAMBRIDGE CB3 0EZ,ENGLAND

来源：

GEOPHYSICS | 1984年 / 49卷 / 10期

关键词：

ACOUSTIC EQUIPMENT - Applications - SEISMIC WAVES - Velocity;

D O I：

10.1190/1.1441569

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：

Two-ship multichannel seismic profiles, using expanding spread and constant offset source-receiver configurations, were shot with explosive charges and a 16. 4 l air gun to investigate the structure of the continental shelf off northwest Britain. A long-range (69 km) expanding spread profile reveals that the crystalline basement off northern Scotland is covered by sedimentary sections up to 2. 5 km thick, and is divisible into two seismic units with velocities of 6. 1 km/s and 6. 6 km/s. Prominent supercritical Moho reflections indicate a crustal thickness of 26. 7 km. Strong sedimentary and basement refractions, together with oblique reflections from the vicinity of the Moho, have been profiled at a constant air gun-receiver offset of 10 km across a sedimentary basin west of the Orkney Islands. Refs.

引用

页码：1605 / 1621

页数：17

共 25 条

[1] LISPB .5. STUDIES OF CRUSTAL SHEAR-WAVES [J].

ASSUMPCAO, M ;

BAMFORD, D .

GEOPHYSICAL JOURNAL OF THE ROYAL ASTRONOMICAL SOCIETY, 1978, 54 (01) :61-73

[2] LISPB .4. CRUSTAL STRUCTURE OF NORTHERN-BRITAIN [J].

BAMFORD, D ;

NUNN, K ;

PRODEHL, C ;

JACOB, B .

GEOPHYSICAL JOURNAL OF THE ROYAL ASTRONOMICAL SOCIETY, 1978, 54 (01) :43-&

[3] EXPLOSION SEISMOLOGY INVESTIGATION OF THE CONTINENTAL-MARGIN WEST OF THE HEBRIDES, SCOTLAND, AT 58-DEGREES-N [J].

BOTT, MHP ;

ARMOUR, AR ;

HIMSWORTH, EM ;

MURPHY, T ;

WYLIE, G .

TECTONOPHYSICS, 1979, 59 (1-4) :217-231

[4]

BRANSON J, 1976, 1968 AUSTR BUR MIN R, V183

[5] THE TRAVEL-TIME EQUATION, TAU-P MAPPING, AND INVERSION OF COMMON MIDPOINT DATA [J].

DIEBOLD, JB ;

STOFFA, PL .

GEOPHYSICS, 1981, 46 (03) :238-254

[6]

EVANS D, 1981, 8112 I GEOL SCI REP

[7] SEISMIC VELOCITIES OF LEWISIAN METAMORPHIC ROCKS AT PRESSURES TO 8-KBAR - RELATIONSHIP TO CRUSTAL LAYERING IN NORTH BRITAIN [J].

HALL, J ;

SIMMONS, G .

GEOPHYSICAL JOURNAL OF THE ROYAL ASTRONOMICAL SOCIETY, 1979, 58 (02) :337-347

[8]

HALL J, 1976, SCOTT J GEOL, V12, P305

[9]

HALL J, 1978, J GEOL SOC LONDON, V135, P555, DOI DOI 10.1144/GSJGS.135.5.0555

[10]

HUGHES VJ, 1983, AM ASS PETR GEOL 15, V1, P6

← 1 2 3 →