Sensitive high-resolution ion microprobe U-Pb dating of prograde and retrograde ultrahigh-temperature metamorphism as exemplified by Sri Lankan granulites

Geology ◽  
2010 ◽  
Vol 38 (11) ◽  
pp. 971-974 ◽  
Author(s):  
K. Sajeev ◽  
I.S. Williams ◽  
Y. Osanai
Keyword(s):  
High Resolution ◽  
Sri Lankan ◽  
Ion Microprobe ◽  
Ultrahigh Temperature

scholarly journals Sensitive High Resolution Ion Microprobe (SHRIMP IIe/MC) of the Institute of Geosciences of the University of São Paulo, Brazil: analytical method and first results

2014 ◽  
Vol 14 (3) ◽  
pp. 3-18 ◽  
Author(s):  
Kei Sato ◽  
Colombo Celso Gaeta Tassinari ◽  
Miguel Angelo Stipp Basei ◽  
Oswaldo Siga Júnior ◽  
Artur Takashi Onoe ◽  
...  
Keyword(s):  
High Resolution ◽  
Analytical Method ◽  
Sao Paulo ◽  
São Paulo ◽  
Ion Microprobe ◽  
First Results ◽  
The University

Aspects of high resolution imaging with a scanning ion microprobe

1988 ◽  
Vol 24 (2-3) ◽  
pp. 97-113 ◽  
Author(s):  
R. Levi-Setti ◽  
J.M. Chabala ◽  
Y.L. Wang
Keyword(s):  
High Resolution ◽  
High Resolution Imaging ◽  
Ion Microprobe ◽  
Resolution Imaging

scholarly journals Geochronology of the Oliverian Plutonic Suite and the Ammonoosuc Volcanics in the Bronson Hill arc: Western New Hampshire, USA

Geosphere ◽  
2019 ◽  
Vol 16 (1) ◽  
pp. 229-257 ◽  
Author(s):  
Peter M. Valley ◽  
Gregory J. Walsh ◽  
Arthur J. Merschat ◽  
Ryan J. McAleer
Keyword(s):  
High Resolution ◽  
New Hampshire ◽  
Volcanic Rocks ◽  
Late Ordovician ◽  
Zircon Geochronology ◽  
Ion Microprobe ◽  
Lower Section ◽  
The West ◽  
Felsic Volcanic ◽  
Felsic Volcanic Rocks

Abstract U-Pb zircon geochronology by sensitive high-resolution ion microprobe–reverse geometry (SHRIMP-RG) on 11 plutonic rocks and two volcanic rocks from the Bronson Hill arc in western New Hampshire yielded Early to Late Ordovician ages ranging from 475 to 445 Ma. Ages from Oliverian Plutonic Suite rocks that intrude a largely mafic lower section of the Ammonoosuc Volcanics ranged from 474.8 ± 5.2 to 460.2 ± 3.4 Ma. Metamorphosed felsic volcanic rocks from within the Ammonoosuc Volcanics yielded ages of 460.1 ± 2.4 and 455.0 ± 11 Ma. Younger Oliverian Plutonic Suite rocks that either intrude both the upper and lower Ammonoosuc Volcanics or Partridge Formation ranged in age from 456.1 ± 6.7 Ma to 445.2 ± 6.7 Ma. These new data and previously published results document extended magmatism for >30 m.y. The ages, along with the lack of mappable structural discontinuities between the plutons and their volcanic cover, suggest that the Bronson Hill arc was part of a relatively long-lived composite arc. The Early to Late Ordovician ages presented here overlap with previously determined igneous U-Pb zircon ages in the Shelburne Falls arc to the west, suggesting that the Bronson Hill arc and the Shelburne Falls arc could be part of one, long-lived composite arc system, in agreement with the interpretation that the Iapetus suture (Red Indian Line) lies to the west of the Shelburne Falls–Bronson Hill arc system.

Influence of Edge Effect and X-Y Effect on Measurement Precision in Sensitive High Resolution Ion Microprobe IIe MC Oxygen Isotopes Analysis

2015 ◽  
Vol 43 (12) ◽  
pp. 1888-1894
Author(s):  
Tao LONG ◽  
Jian SHI ◽  
Ze-Min BAO ◽  
Stephen W.J. Clement ◽  
Yu-Hai ZHANG ◽  
...  
Keyword(s):  
High Resolution ◽  
Oxygen Isotopes ◽  
Edge Effect ◽  
Measurement Precision ◽  
Ion Microprobe
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