Counterclockwise P-T-t trajectory from the metamorphic sole of a Neo-Tethyan ophiolite (Turkey)

被引:86
作者
Dilek, Y [1 ]
Whitney, DL [1 ]
机构
[1] UNIV N CAROLINA,DEPT GEOL,CHAPEL HILL,NC 27599
基金
美国国家科学基金会;
关键词
ophiolite; metamorphic sole; P-T-t trajectory; Neo-Tethys; eastern Mediterranean region; geology of Turkey;
D O I
10.1016/S0040-1951(97)00038-3
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
The Kiziltepe ophiolitic thrust sheet in the Bolkar Mountains of Turkey occurs between two subparallel ophiolite belts bounding the Tauride carbonate platform and represents a remnant of the Cretaceous Neo-Tethyan oceanic lithosphere. It is underlain by foliated amphibolite that represents a metamorphic sole developed at the inception of an intra-oceanic subduction zone in the Neo-Tethys similar to 92-90 Ma. Blueschist-facies overprinting of the amphibolite indicates that the metamorphic sole was dragged deeper into the subduction zone where it experienced increasing P/T with cooling. Regional tectonic constraints suggest a Maastrichtian age for the timing of this blueschist-facies metamorphism. Sodic amphibole-rich veins and crossite/Mg-riebeckite rims on hornblende suggest that growth of blueschist-facies minerals was facilitated by infiltration of fluid along fractures and grain boundaries. We infer a counterclockwise P-T-t trajectory during which metamorphism was accompanied/succeeded by rapid uplift along the northern edge of the Tauride belt in Late Cretaceous-early Tertiary time.
引用
收藏
页码:295 / 310
页数:16
相关论文
共 50 条
[1]  
AKDENIZ N, 1979, UNPUB SIMAV EMET TAV
[3]  
[Anonymous], 1984, KET S BOOK ANK
[4]  
[Anonymous], 1966, B MINER RES EXPLOR
[5]   INTERNALLY-CONSISTENT THERMODYNAMIC DATA FOR MINERALS IN THE SYSTEM NA2O-K2O-CAO-MGO-FEO-FE2O3-AL2O3-SIO2-TIO2-H2O-CO2 [J].
BERMAN, RG .
JOURNAL OF PETROLOGY, 1988, 29 (02) :445-522
[6]  
BLUMENTHAL MM, 1956, SPEC PUBL SER D, V7
[7]  
BROWN EH, 1982, GEOL SOC AM BULL, V93, P1087, DOI 10.1130/0016-7606(1982)93<1087:PSAARO>2.0.CO
[8]  
2
[9]  
Brunn JH, 1970, B SOC GEOL FR, V3, P515
[10]  
CAKIR U, 1978, B SOC GEOL FR, V20, P61