Date File Created	Name of Creator													
3/16/2011	Josh Rosera (UNC)													
GeoRef Data	2010-075164													
DN	GeoRef													
TI	"Testing competing caldera models using U/Pb geochronology; intrusive history of the Questa Caldera, Latir volcanic field, New Mexico, USA"													
AU	"Tappa, Michael J"													
AF	"University of North Carolina at Chapel Hill, Chapel Hill, NC, United States (USA)"													
DE	"absolute age, calderas, Cenozoic, chemical composition, crystal fractionation, eruptions, Holocene, igneous rocks, ignimbrite, intrusions, Latir volcanic field, New Mexico, numerical models, plutons, pyroclastics, Quaternary, Questa Caldera, Taos County New Mexico, trace elements, U/Pb, United States, volcanic features, volcanic rocks, volcanism, volcanoes"													
AB	"A compelling new model for caldera evolution challenges the standard depiction of large-scale volcanism. Here, I test these competing models by establishing the temporal and chemical relationship between ignimbrite and potential cogenetic plutons related to the Questa caldera, Latir volcanic field, New Mexico."													
LA	English													
FE	"References: 94, illus. incl. 3 tables"													
PY	2009													
PT	"Thesis or dissertation, Master's, Monographic"													
CP	United States (USA)													
CL	"24: Quaternary geology, 05A: Igneous and metamorphic petrology"													
CY	"GeoRef, Copyright 2008, American Geological Institute."													
AN	2010-075164													
Sample Data														
Item	LatDD	LongDD	Loc_prec	LatDD	LongDD	Loc_prec	Age	Max_age	Min_age	Sample_Description	Rock_Type	Rock_Class	Material	State
Units	dd	dd		dd	dd		ma	ma	ma					
Method	1	1		2	2		3	3	3					
Sample Name														
MZQ-9	36.7874	-105.496	0.0001				22.49	22.53	22.45	Porphyritic Granodiorite of Rio Hondo	PLUTONIC	Granodiorite	Zircon	New Mexico
MZQ-12	36.7405	-105.506	0.0001				25.02	25.07	24.97	Granite of Cabresto Lake	PLUTONIC	Granite	Zircon	New Mexico
MZQ-13	36.7387	-105.504	0.0001				24.94	24.99	24.89	Granite of Cabresto Lake	PLUTONIC	Granite	Zircon	New Mexico
MZQ-15	36.7592	-105.553	0.0001				25.23	25.32	25.14	Metaluminous Canada Pinabete	PLUTONIC	Granite	Zircon	New Mexico
MZQ-19	36.6431	-105.519	0.0001				22.63	22.66	22.6	Porphyritic Granodiorite of Rio Hondo	PLUTONIC	Granodiorite	Zircon	New Mexico
MZQ-33	36.4997	-105.518	0.0001				22.99	23.11	22.87	Upper Granite of Rio Hondo	PLUTONIC	Granite	Zircon	New Mexico
MZQ-40				36.435	-105.554	0.01	22.81	22.87	22.75		PLUTONIC	Granodiorite	Zircon	New Mexico
Method Data														
1	TABLE	2007-900101	"From table in thesis by Zimmerer, MJ (2008); New Mexico Tech; See geoRef 2007-900101 below"											
2	SCAN	2010-075164												
3	U-PBC:ZIRC	306												
Reference Data														
Georef#	2007-900101													
TI	"The (super 40) Ar/ (super 39) Ar geochronology and thermochronology of the Latir volcanic field, New Mexico; implications for silicic caldera volcanism"													
AU	"Zimmerer, M.J."													
AF	"New Mexico Institute of Mining and Technology, Department of Earth and Environmental Science, Socorrow, NM (USA)"													
LA	English													
PY	2008													
PT	"Thesis or dissertation, Master's, Monographic"													
CP	United States (USA)													
AN	2007-900101