TIMING OF OBDUCTION, TECTONIC AFFINITY, AND COOLING HISTORY OF THE SPONGTANG OPHIOLITE, NORTHWEST INDIA, HIMALAYA

2017 ◽  
Author(s):  
E.C. Pease ◽  
◽  
Nick Dygert ◽  
E.J. Catlos ◽  
Michael Brookfield
1983 ◽  
Vol 106 (4) ◽  
pp. 443-449 ◽  
Author(s):  
Surendra Kumar Saxena ◽  
Alberto Dal Negro
Keyword(s):  

2018 ◽  
Vol 229 ◽  
pp. 1-19 ◽  
Author(s):  
Claire I.O. Nichols ◽  
Robert Krakow ◽  
Julia Herrero-Albillos ◽  
Florian Kronast ◽  
Geraint Northwood-Smith ◽  
...  

1998 ◽  
Vol 43 (S1) ◽  
pp. 137-137
Author(s):  
J. L. Wan ◽  
Q. L. Wang ◽  
D. M. Li

Tectonics ◽  
2003 ◽  
Vol 22 (5) ◽  
pp. n/a-n/a ◽  
Author(s):  
M. A. House ◽  
S. A. Kelley ◽  
M. Roy

1980 ◽  
Vol 43 (329) ◽  
pp. 597-603 ◽  
Author(s):  
W. D. Birch

SummaryAn olivine-titanomagnetite-apatite-clinopyroxene-mica-nepheline-feldspar assemblage occurs in late-stage vesicles in a small outcrop of olivine leucitite at Cosgrove, Victoria. The vesicles were formed by exsolution of volatiles at an early stage in the cooling history of the lava. Subsequently, a volatile-rich residual liquid filled cavities and fractures, giving rise to a coarse-grained pegmatoid rock type similar in over-all mineralogy to the vesicles. The volatiles facilitating crystallization in both the vesicles and the pegmatoid were probably enriched in F, CO2, and P. A number of geothermometers applied to the vesicle assemblage failed to agree on likely crystallization temperatures.


2001 ◽  
Vol 7 (S2) ◽  
pp. 254-255
Author(s):  
KT Moore ◽  
DR Veblen ◽  
JM Howe

For over 30 years geologists have been trying to better understand antiphase domains (APD) and boundaries (APB) in pigeonite in hopes of using them as markers for the thermal history of the rocks in which they are found. The ability to know the cooling history of igneous rocks is of great interest to geologists and pigeonite has received special attention on this matter because it has exsolution (precipitation) and antiphase domains (APD), both of which can be used as possible thermal markers. APDs in pigeonite arise because of the C2/c → P21/c transformation that occurs upon cooling. When multiple APDs nucleate, grow, and impinge upon one another, they are either in registry or have a translational discrepancy of ½(a+b). The size of the APDs can be used as a qualitative marker of cooling rates, since slowly cooled pigeonites favor large APDs and rapidly cooled pigeonites favor small APDs.


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