@article {310,
	title = {Monazite geochronology of Proterozoic quartzites; a powerful tool for understanding reactivation of continental lithosphere in the Southwestern United States},
	journal = {Abstracts with Programs - Geological Society of America},
	volume = {34},
	year = {2002},
	note = {Accession Number: 2004-069830; Conference Name: Geological Society of America, Northeastern Section, 37th annual meeting; Springfield, MA, United States; Conference Date: 20020325; Language: English; Coden: GAAPBC; Collation: 1; Collation: 26; Publication Types: Abstract Only; Serial; Conference document; Updated Code: 200421; Monograph Title: Geological Society of America, Northeastern Section, 37th annual meeting; Monograph Author(s): Anonymous; Reviewed Item: Analytic},
	month = {2002/03/01/},
	pages = {26 - 26},
	publisher = {Geological Society of America (GSA) : Boulder, CO, United States},
	address = {United States},
	abstract = {<p>
	The influence of approximately 1.65 vs. 1.4 Ga tectonism on the evolution of the Proterozoic orogenic belt in the southwestern United States has been an issue of considerable debate. This belt was assembled at approximately 1.75-1.65 Ga, but recent work has highlighted a significant reactivation of the orogen at 1.4 Ga. The discovery of abundant monazite in regionally extensive, 1-2 km thick quartzites found throughout the orogenic belt may provide important new constraints on its tectonic history. These quartzites define the present regional geometry of exposed Proterozoic rocks and are believed to strongly influence local structure. Preliminary results of in-situ microprobe dating of monazite from the Ortega Quartzite in the Tusas Mountains in northern New Mexico suggest an increasing influence of 1.4 Ga tectonism from north to south within the range. Monazite from the Jawbone Syncline within northernmost part of the range consistently yields ages of 1.75 to 1.72 Ga. These monazite grains are interpreted to be mostly detrital in origin, with REE and age zoning reflecting the history of the source terranes. Monazite from an anticline immediately to the south has 1.72-1.75 Ga detrital cores with 1.67-1.68 Ga rims, implying that initial fold formation occurred during the approximately 1.67-1.65 Ga Mazatzal Orogeny. Monazite from the middle and southern Tusas Mountains is predominantly 1.4 Ga in age. This suggests that a previously documented gradient in deformation and metamorphism from north to south may reflect a multistage tectonic history for the range, with an increasingly intense overprint of 1.4 Ga tectonism to the south. Monazite has also been found in several Proterozoic quartzites in Colorado, allowing the possibility to compare and correlate deformation and metamorphism across the region. Monazite dating in thick quartzites represents a powerful tool by which the effects of approximately 1.65 and 1.4 Ga tectonism can be separated, leading to a better understanding of the evolution and stabilization of Proterozoic crust in the southwestern United States and may be an important new technique in deconvoluting the tectonic histories of other orogenic belts.</p>
},
	keywords = {$\#$StaffPubs, absolute age;, continental lithosphere;, crust;, deformation;, Geochronology; 03, Jawbone Syncline;, lithosphere;, Mazatzal Orogeny;, metamorphic rocks;, metamorphism;, monazite;, New Mexico;, orogeny;, Paleoproterozoic;, phosphates;, Precambrian;, Proterozoic;, quartzites;, Southwestern U.S.;, tectonics;, Tusas Mountains;, United States;, upper Precambrian;},
	isbn = {00167592},
	url = {http://silk.library.umass.edu/login?url=http://search.ebscohost.com/login.aspx?direct=true\&db=geh\&AN=2004-069830\&site=ehost-live\&scope=site},
	author = {Joseph P Kopera and Williams, Michael L. and Jercinovic, Michael J.}
}
@article {311,
	title = {Monazite geochronology of the Ortega Quartzite: documenting the extent of 1.4 Ga tectonism in northern New Mexico and across the orogen},
	journal = {Abstracts with Programs - Geological Society of America},
	volume = {34},
	year = {2002},
	note = {Accession Number: 2003-041318; Conference Name: Geological Society of America, Rocky Mountain Section, 54th annual meeting; Cedar City, UT, United States; Conference Date: 20020507; Language: English; Coden: GAAPBC; Collation: 1; Collation: 10; Publication Types: Abstract Only; Serial; Conference document; Updated Code: 200313; Monograph Title: Geological Society of America, Rocky Mountain Section, 54th annual meeting; Monograph Author(s): Anonymous; Reviewed Item: Analytic},
	month = {2002/04/01/},
	pages = {10 - 10},
	publisher = {Geological Society of America (GSA) : Boulder, CO, United States},
	address = {United States},
	abstract = {<p>
	Preliminary results of in-situ microprobe dating of monazite from the Ortega Quartzite suggest an increasing influence of 1.4 Ga tectonism from north to south within the in the Tusas Mountains of northern New Mexico. Monazite from the Jawbone Syncline within northernmost part of the range consistently yields ages of 1.75 to 1.72 Ga. These monazite grains are interpreted to be mostly detrital in origin, with REE and age zoning reflecting the history of the source terranes. Monazite from an anticline immediately to the south has 1.72-1.75 Ga detrital cores with 1.67-1.68 Ga rims, implying that initial fold formation occurred during the approximately 1.67-1.65 Ga Mazatzal Orogeny. Monazite from the middle and southern Tusas Mountains is predominantly 1.4 Ga in age. This suggests that a previously documented gradient in deformation and metamorphism from north to south may reflect a multistage tectonic history for the range, with an increasingly intense overprint of 1.4 Ga tectonism to the south. The discovery of abundant monazite in regionally extensive, 1-2 km thick quartzites found throughout the Proterozoic orogenic belt of the southwestern United States may provide important new constraints on the region{\textquoteright}s tectonic history, specifically, the extent and influence of 1.4 Ga tectonism on the formation and modification of fundamental large-scale structures. These quartzites define the present regional geometry of exposed rocks within the Proterozoic Mazatzal Province, and are believed to strongly influence local structure. In addition to northern New Mexico, monazite has also been found in several Proterozoic quartzites in Colorado, allowing the possibility to compare and correlate deformation and metamorphism across the region. Monazite dating in thick quartzites represents a powerful tool by which we can better understand the evolution and stabilization of Proterozoic crust in the southwestern United States, and may be an important new technique in deconvoluting the tectonic histories of other orogenic belts.</p>
},
	keywords = {$\#$StaffPubs, anticline, deformation;, folds;, monazite;, New Mexico;, orogeny;, Ortega Group;, phosphates;, Precambrian;, Proterozoic;, Structural geology; 16, tectonics;, Tusas Mountains;, United States;, upper Precambrian;},
	isbn = {00167592},
	url = {http://silk.library.umass.edu/login?url=http://search.ebscohost.com/login.aspx?direct=true\&db=geh\&AN=2003-041318\&site=ehost-live\&scope=site},
	author = {Joseph P Kopera and Williams, Michael L. and Jercinovic, Michael J.}
}
@article {312,
	title = {Monazite geochronology of the Proterozoic Ortega Quartzite; documenting the extent of 1.4 Ga tectonism in the Tusas Range and beyond},
	journal = {New Mexico Geology},
	volume = {24},
	year = {2002},
	note = {Accession Number: 2004-009303; Conference Name: New Mexico Geological Society spring meeting; Socorro, NM, United States; Conference Date: 20020405; Language: English; Coden: NMGED2; Collation: 1; Collation: 59; Publication Types: Abstract Only; Serial; Conference document; Updated Code: 200403; Monograph Title: New Mexico Geological Society spring meeting; abstracts; Monograph Author(s): Anonymous; Reviewed Item: Analytic},
	month = {2002/05/01/},
	pages = {59 - 59},
	publisher = {New Mexico Bureau of Mines and Mineral Resources : Socorro, NM, United States},
	address = {United States},
	keywords = {$\#$StaffPubs, absolute age;, dates;, deformation;, electron probe data;, geochronology;, Geochronology; 03, ion probe data;, mass spectra;, metamorphic rocks;, metamorphism;, monazite;, New Mexico;, orogeny;, Ortega Group;, phosphates;, Precambrian;, Proterozoic;, quartzites;, spectra;, Structural geology; 16, tectonics;, Tusas Mountains;, United States;, upper Precambrian;},
	isbn = {0196948X},
	url = {http://silk.library.umass.edu/login?url=http://search.ebscohost.com/login.aspx?direct=true\&db=geh\&AN=2004-009303\&site=ehost-live\&scope=site},
	author = {Joseph P Kopera and Williams, Michael L. and Jercinovic, Michael J.}
}
@mastersthesis {307,
	title = {Lineaments; their value in assessing groundwater availability and quality in bedrock aquifers of glaciated metamorphic terrains; a case study},
	year = {1992},
	note = {Accession Number: 1993-003224; Educational Institutions: University of Massachusetts at Amherst : Amherst, MA, United States; Language: English; Collation: 592; Type of Degree: Doctoral; Publication Types: Thesis or dissertation; Updated Code: 1993; Reviewed Item: Monograph},
	month = {1992/01/01/},
	address = {United States},
	keywords = {$\#$StaffPubs, aerial photography;, aquifers;, bedrock;, case studies;, fractures;, Georgetown Maine;, ground water;, Hydrogeology; 21, lineaments;, Maine;, outcrops;, Sagadahoc County Maine;, SLAR;, Structural geology; 16, terrains;, United States;, water quality;, water wells;, wells;},
	url = {http://silk.library.umass.edu/login?url=http://search.ebscohost.com/login.aspx?direct=true\&db=geh\&AN=1993-003224\&site=ehost-live\&scope=site},
	author = {Stephen B Mabee}
}
