ISOTOPIC DATING OF THE EMPLACEMENT OF THE ULTRAMAFIC MASSES IN THE SERRANIA-DE-RONDA, SOUTHERN SPAIN

被引：108

作者：

PRIEM, HNA ^{[1
]}

BOELRIJK, NAIM ^{[1
]}

HEBEDA, EH ^{[1
]}

OEN, IS ^{[1
]}

VERDURMEN, EAT ^{[1
]}

VERSCHURE, RH ^{[1
]}

机构：

[1] UNIV AMSTERDAM,INST GEOL,DEPT PETR & MINERAL,NL-1018 VZ AMSTERDAM,NETHERLANDS

来源：

CONTRIBUTIONS TO MINERALOGY AND PETROLOGY | 1979年 / 70卷 / 01期

关键词：

D O I：

10.1007/BF00371876

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 Rb-Sr analysis of suites of samples from a small intrusion of cordierite-bearing alkali granite into the peridotite of the Sierra Bermeja (Serrania de Ronda) yields an age of 22± 4 Ma (λ = 1.42×10-11 a-1): Late Oligocene/Early Miocene. It is believed that the intrusion was derived from contact-anatectic melts produced along the hot ultramafic mass during and/or directly following its tangential, tectonic dislocation from a mantle diapir. Its age can thus be taken as dating the termination of the hot emplacement of the ultramafic masses. K-Ar dates of biotites and Rb-Sr dates of biotite/whole-rock pairs in contact-metamorphic wall rocks along the ultramafics mostly lie between 19.5 and 18.5 Ma. This probably indicates that about 19 Ma ago the contact-zones of the ultramafic masses had cooled down to the blocking temperature of biotite to Rb-Sr and K-Ar. © 1979 Springer-Verlag.

引用

页码：103 / 109

页数：7

共 40 条

[1] AGUILAR MS, 1973, B I GEOL MIN ESP, V84, P447
[2] ANDRIESSEN PAM, 1978, THESIS STATE U
[3] ARMSTRONG RL, 1966, EARTH PLANET SC LETT, V1, P13, DOI DOI 10.1016/0012-821X(66)90097-5
[4] Blumenthal M, 1928, ECLOGAE GEOL HELV, V21, P358
[5] BOURGOIS J, 1972, CR ACAD SCI D NAT, V275, P169
[6] BUNTFUSS J, 1970, GEOL JB, V87, P373
[7] DAROT M, 1974, CR ACAD SCI PARIS D, V287, P1673
[8] Dickey Jr J. S., 1970, MINERAL SOC AM SPEC, V3, P33
[9] DICKEY JS, 1974, AM MINERAL, V59, P1183
[10] Didon J., 1973, B SOC G OLOGIQUE FR, V7, P77, DOI [10.2113/gssgfbull.S7-XV.2.77, DOI 10.2113/GSSGFBULL.S7-XV.2.77]

← 1 2 3 4 →