SINIAN PALEOMAGNETIC RESULTS FROM THE TARIM BLOCK, WESTERN CHINA

被引：22

作者：

LI, YP ^{[1
]}

LI, YG ^{[1
]}

SHARPS, R ^{[1
]}

MCWILLIAMS, M ^{[1
]}

GAO, ZG ^{[1
]}

机构：

[1] BUR GEOL & MINERAL RESOURCES,GEOL RES INST,XINJIANG,PEOPLES R CHINA

来源：

PRECAMBRIAN RESEARCH | 1991年 / 49卷 / 1-2期

基金：

中国国家自然科学基金;

关键词：

D O I：

10.1016/0301-9268(91)90056-G

中图分类号：

P [天文学、地球科学];

学科分类号：

07 ;

摘要：

A Sinian (latest Precambrian) section composed of shallow marine carbonates, nonmarine clastics, tillites and minor volcanic rocks, is exposed in Wushi, along the northwestern margin of the Tarim block of China. Paleomagnetic results from this section reveal at least six geomagnetic field reversals. A comparison between Sinian and Devonian paleomagnetic data suggests little net paleolatitude shift during the Early Paleozoic for Tarim. The low inclinations from layers strati-graphically above and below the tillites indicate that they were magnetized in shallow (8-degrees +/- 6-degrees) paleolatitudes (north or south). Precise magnetostratigraphic correlation with other Sinian sections is hampered by difficulty in recovering a complete paleomagnetic record, disconformities and unconformities within the section, and a complex mixed polarity interval.

引用

页码：61 / 71

页数：11

共 28 条

[1]

CARROLL A, 1988, 1988 DELP TOK INT S

[2] PRELIMINARY CONCLUSIONS OF THE ROYAL-SOCIETY AND ACADEMIA-SINICA 1985 GEOTRAVERSE OF TIBET [J].

CHANG, CF ;

CHEN, NS ;

COWARD, MP ;

DENG, WM ;

DEWEY, JF ;

GANSSER, A ;

HARRIS, NBW ;

JIN, CW ;

KIDD, WSF ;

LEEDER, MR ;

LI, HA ;

LIN, JL ;

LIU, CJ ;

MEI, HJ ;

MOLNAR, P ;

PAN, Y ;

PAN, YS ;

PEARCE, JA ;

SHACKLETON, RM ;

SMITH, AB ;

SUN, YY ;

WARD, M ;

WATTS, DR ;

XU, JT ;

XU, RH ;

YIN, JX ;

ZHANG, YQ .

NATURE, 1986, 323 (6088) :501-507

[3] LOW PALEOLATITUDE OF DEPOSITION FOR LATE PRECAMBRIAN PERIGLACIAL VARVITES IN SOUTH-AUSTRALIA - IMPLICATIONS FOR PALEOCLIMATOLOGY [J].

EMBLETON, BJJ ;

WILLIAMS, GE .

EARTH AND PLANETARY SCIENCE LETTERS, 1986, 79 (3-4) :419-430

[4]

FANG W, 1988, EOS T AGU, V69, P340

[5]

Gao Z.J., 1985, SINIAN SYSTEM XINJIA

[6] THE STABILITY AND SIGNIFICANCE OF MAGNETISM IN SEDIMENTARY ROCKS [J].

GRAHAM, JW .

JOURNAL OF GEOPHYSICAL RESEARCH, 1949, 54 (1-2) :131-167

[7]

Harland W. B., 1982, GEOLOGIC TIME SCALE

[8] PRECAMBRIAN-CAMBRIAN BOUNDARY PROBLEM - MAGNETOSTRATIGRAPHY OF AMADEUS BASIN, CENTRAL AUSTRALIA [J].

KIRSCHVINK, JL .

GEOLOGICAL MAGAZINE, 1978, 115 (02) :139-150

[9] MAGNETOSTRATIGRAPHY OF LOWER CAMBRIAN STRATA FROM THE SIBERIAN PLATFORM - A PALEOMAGNETIC POLE AND A PRELIMINARY POLARITY TIME-SCALE [J].

KIRSCHVINK, JL ;

ROZANOV, AY .

GEOLOGICAL MAGAZINE, 1984, 121 (03) :189-203

[10] THE LEAST-SQUARES LINE AND PLANE AND THE ANALYSIS OF PALEOMAGNETIC DATA [J].

KIRSCHVINK, JL .

GEOPHYSICAL JOURNAL OF THE ROYAL ASTRONOMICAL SOCIETY, 1980, 62 (03) :699-718

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