Zobrazeno 1 - 10
of 17
pro vyhledávání: '"Barbara M. Hill"'
Autor:
Penelope J. Lancaster, Barbara M. Hill, M.E. Bickford, Bin Fu, James M. McLelland, Noriko T. Kita, F. Z. Page, John W. Valley
Publikováno v:
Journal of Metamorphic Geology. 27:41-54
Oxygen isotope ratios and rare earth element (REE) concentrations provide independent tests of competing models of injection v. anatexis for the origin of migmatites from amphibolite and granulite facies metasedimentary rocks of the Adirondack Mounta
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::8a6b2291bfe048e53736e64e2e2a6e84
https://doi.org/10.1111/j.1525-1314.2008.00802.x
https://doi.org/10.1111/j.1525-1314.2008.00802.x
Publikováno v:
Chemical Geology. 256:24-32
Subduction of the Pacific plate beneath the Mariana forearc releases fluids to the overlying mantle wedge that ascend, producing serpentinite “mud” that discharges on the ocean floor. As part of Leg 195 of the Ocean Drilling Program cores were ob
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::cd8ff54c926d015e60b18f640f06008c
https://doi.org/10.1016/j.chemgeo.2008.07.021
https://doi.org/10.1016/j.chemgeo.2008.07.021
Publikováno v:
Geological Society of America Bulletin. 120:950-961
U-Pb sensitive high-resolution ion microprobe (SHRIMP) analyses of zircons from migmatitic metapelites in the eastern Adirondack Highlands demonstrate that substantial anatexis took place ca. 1050 Ma during the late, but still high-grade, ca. 1090–
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::82100735c3bca6a047c234c1672ea837
https://doi.org/10.1130/b26309.1
https://doi.org/10.1130/b26309.1
Autor:
Matthew J. Heumann, Michael J. Jercinovic, Barbara M. Hill, James M. McLelland, Bruce Selleck, M.E. Bickford
Publikováno v:
Geological Society of America Bulletin. 118:1283-1298
Anatectic leucogranites are common in metapelites within both the highlands and lowlands terranes of the Adirondack Mountains of northern New York State. The formation of these igneous bodies, which are folded in the lowlands and commonly mylonitized
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::34e93b37828a356d5585cc042f97909b
https://doi.org/10.1130/b25927.1
https://doi.org/10.1130/b25927.1
Autor:
Barbara M. Hill, M.E. Bickford, John W. Valley, Michael A. Hamilton, Cory C. Clechenko, James M. McLelland
Publikováno v:
Geological Society of America Bulletin. 116:1299-1317
The low abundance of igneous zircon in Proterozoic massif anorthosites has presented a major obstacle to the acquisition of direct absolute ages of crystallization for these important rocks. Indirect dating that relies on zircon ages from associated
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::db87a1982776ab765c3abef5c2dd1e0d
https://doi.org/10.1130/b25482.1
https://doi.org/10.1130/b25482.1
Publikováno v:
Canadian Journal of Earth Sciences. 38:1017-1025
An augened, strongly flasered, and multiply folded monzonitic gneiss occurs in a structural dome in the Black Bear Island Lake region of northern Saskatchewan, within the ca. 1850 Ma Paleoproterozoic southern Rottenstone Domain of the Trans-Hudson Or
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::9062a91d63854650d73d8cdcaaeef83b
https://doi.org/10.1139/e01-027
https://doi.org/10.1139/e01-027
Publikováno v:
Nursing Clinics of North America. 27:1-10
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::59aa404c12d8048d73e53a7be7d3f370
https://doi.org/10.1016/s0029-6465(22)02744-x
https://doi.org/10.1016/s0029-6465(22)02744-x
Autor:
Donald I. Siegel, Barbara M. Hill
Publikováno v:
Journal of Hydrology. 123:211-224
Variations in the concentrations of metals in three peat profiles from the Lost River Peatland, Minnesota are related to the degree of groundwater discharge into the peat, rather than the metal content of the peat when it was originally deposited. El
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::27b52254ae6fdbd9a90de603a3d56154
https://doi.org/10.1016/0022-1694(91)90091-u
https://doi.org/10.1016/0022-1694(91)90091-u
Publikováno v:
Geology. 36:555
Lu-Hf depleted mantle model (TDM) ages, obtained by analysis of zircons previously dated by U-Pb methods, demonstrate that ca. 1.75 Ga bimodal Paleoproterozoic rocks in the Gunnison-Salida region of central Colorado, and by extension in much of the s
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::d9d20ff0c9a797efdf43ca352cec4730
https://doi.org/10.1130/g24700a.1
https://doi.org/10.1130/g24700a.1
Autor:
Barbara M. Hill, M.E. Bickford
Publikováno v:
Geology. 35:167
A common model for the Paleoproterozoic crustal evolution of southern Laurentia involves southerly accretion of successively younger island arcs from 1780 to 1650 Ma. This model may be oversimplified, however, for although andesite and basaltic andes
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::a98de9ca9d6800f0e0585e9aba8a05cd
https://doi.org/10.1130/g23174a.1
https://doi.org/10.1130/g23174a.1