Excess argon in K–Ar and Ar–Ar geochronology
S Kelley - Chemical Geology, 2002 - Elsevier
The K–Ar and Ar–Ar dating techniques occasionally produce anomalously old ages
attributed to excess argon, and such data is often rejected as not offering any insight into the …
attributed to excess argon, and such data is often rejected as not offering any insight into the …
K-Ar and Ar-Ar dating
S Kelley - Reviews in Mineralogy and Geochemistry, 2002 - pubs.geoscienceworld.org
The aim of this chapter is to present the K-Ar and Ar-Ar dating techniques in the context of
noble gas studies, since there are already several recent texts on K-Ar and Ar-Ar dating …
noble gas studies, since there are already several recent texts on K-Ar and Ar-Ar dating …
Age significance of U–Th–Pb zircon data from early Archaean rocks of west Greenland—a reassessment based on combined ion-microprobe and imaging studies
MJ Whitehouse, BS Kamber, S Moorbath - Chemical geology, 1999 - Elsevier
The geochronological evolution of early Archaean Amı̂tsoq gneisses from southern West
Greenland is reassessed here using the well-established cathodoluminescence imaging …
Greenland is reassessed here using the well-established cathodoluminescence imaging …
40Ar/39Ar dating of white micas from an Alpine high-pressure metamorphic belt on Naxos (Greece): the resetting of the argon isotopic system
JR Wijbrans, I McDougall - Contributions to Mineralogy and Petrology, 1986 - Springer
Overprinting of white micas from high pressure, low to medium temperature (M 1)
metamorphic assemblages in pelitic schists on Naxos during subsequent thermal dome (M …
metamorphic assemblages in pelitic schists on Naxos during subsequent thermal dome (M …
[图书][B] Ultrahigh-pressure metamorphic rocks in the Dabieshan-Sulu region of China
C Bolin - 1996 - Springer
Recent discoveries of diamond and coesite in the ultrahigh-pressure (UHP) metamorphosed
supracrustal rocks have provoked a new challenge to present-day geodynamic ideas. A …
supracrustal rocks have provoked a new challenge to present-day geodynamic ideas. A …
Identification of excess 40Ar by the 40Ar/39Ar age spectrum technique
MA Lanphere, GB Dalrymple - Earth and Planetary Science Letters, 1976 - Elsevier
Abstract 40 Ar/39 Ar incremental heating experiments on igneous plagioclase, biotite, and
pyroxene that contain known amounts of excess 40 Ar indicate that saddle-shaped age …
pyroxene that contain known amounts of excess 40 Ar indicate that saddle-shaped age …
Excess argon in phengite from eclogite: Evidence from dating of eclogite minerals by Sm Nd, Rb Sr and 40Ar39Ar methods
S Li, S Wang, Y Chen, D Liu, JI Qiu, H Zhou, Z Zhang - Chemical Geology, 1994 - Elsevier
The existence of excess Ar in phengites from coesite-bearing ultrahigh-pressure eclogites of
the Dabie Mountains and Su Lu terrain, China, has been confirmed by dating of minerals …
the Dabie Mountains and Su Lu terrain, China, has been confirmed by dating of minerals …
The evolution of excess argon in Alpine biotites—a40Ar-39Ar analysis
JC Roddick, RA Cliff, DC Rex - Earth and Planetary Science Letters, 1980 - Elsevier
Alpine biotites containing excess 40 Ar have been analysed by step-heating argon analysis
of both neutron irradiated and unirradiated samples. In addition to age spectra the data are …
of both neutron irradiated and unirradiated samples. In addition to age spectra the data are …
Extreme Nd-isotope heterogeneity in the early Archaean—fact or fiction? Case histories from northern Canada and West Greenland
S Moorbath, MJ Whitehouse, BS Kamber - Chemical Geology, 1997 - Elsevier
Sm Nd data on rock suites from early Archaean provinces in northern Canada and West
Greenland clearly demonstrate that tectonothermal (ie igneous, metamorphic, tectonic) …
Greenland clearly demonstrate that tectonothermal (ie igneous, metamorphic, tectonic) …
Lu–Hf, Sm–Nd, and U–Pb isotopic coupling and decoupling in apatite
Apatite is a useful geochronological tool due to its common occurrence and incorporation of
a variety of radioactive parent isotopes during crystallisation. However, an understanding of …
a variety of radioactive parent isotopes during crystallisation. However, an understanding of …