The oxygen isotope geochemistry of granitoid rocks from the southern and central Yukon by Georges Roman Dagenais Download PDF EPUB FB2
ELSEVIER Chemical Geology () CHEMICAL GEOLOGY INrGIMN(: ISOTOPE GEOSCIENCE Oxygen and hydrogen isotope geochemistry of S- and I-type granitoids: the Cape Granite suite, South Africa Chris Harris a, *, Kevin Faure a°', Roger E.
Diamond a, Reyno Scheepers b a Department of Geological Sciences, University of Cape Town, Rondebosch,Cited by: The composite Yozgat batholith consists of a S-I-A-type granitoid association intruding the supra-subduction zone-type (SSZ-type) central Anatolian ophiolite and medium- to high-grade metasedimentary rocks of the central Anatolian crystalline complex.
These rocks are unconformably covered by Palaeocene to Early Eocene sedimentary rocks. The I-type granitoids are the most common rock Cited by: Metamorphic rocks have oxygen isotope compositions that are usually similar to those of igneous and sedimentary rocks, with δ 18 O values ranging from +6‰ to +18‰, depending on the geochemical nature of protolith and the degree of water–rock interaction during prograde metamorphism (e.g., Hoefs,Sharp et al., ).Cited by: Abstract Granitic orthogneiss is widespread throughout the metamorphic core of the Brooks Range in both the ductilely deformed blueschist/greenschist facies Schist Belt and the lower grade Central.
The Lyhamyar deposit is a large Sb deposit in the Southern Shan Plateau, Eastern Myanmar. The deposit is located in the Early Silurian Linwe Formation, occurring as syntectonic quartz-stibnite veins.
The ore body forms an irregular staircase shape, probably related to steep faulting. Based on the mineral assemblages and cross-cutting relationships, the deposit shows two mineralization stages Author: Aung Min Oo, Lv Xinbiao, Khin Zaw, Than Htay, Sun Binke, Munir Mohammed Abdalla Adam.
White Geochemistry Chapter 9: Stable Isotopes The Fractionation Factor The fractionation factor, α, is the ratio of isotope ratios in two phases: α A−B ≡ R A R B The fractionation of isotopes between two phases is also often reported as ∆.
Muehlenbachs's 99 research works with 2, citations and 4, reads, including: Origin of the high-grade Early Jurassic Brucejack epithermal Au-Ag deposits, Sulphurets Mining Camp.
Sun, T.K. Kyser, M. Stauffer, R. Kerrich and J. Lewry, Constraints on the timing of crustal imbrication in the central Trans-Hudson Orogen from single zircon Pb/Pb ages of granitoid rocks from the Pelican thrust zone, an Journal of Earth Sciences, 33, Plutons of this age are rare in the Yukon composite terrane of south-central Alaska, but a pluton of this age (ca.
– Ma) has been recently documented in along-strike rocks in the Yukon (M. Colpron,personal commun.). Another potential distal source may be plutons of the eastern portion of the Coast Mountains batholith.
Clark M. Johnson's research works w citations reads, including: Life on a Mesoarchean marine shelf – insights from the world’s oldest known granular iron formation.
Clemens and Finger propose that “Fa 90 would be stable at ∼ times the f O 2 of FMQ” and suggest that the relatively reduced condition of the Jiuyishan granite would be satisfied by melting of an ilmenite-series granitoid; therefore, relatively low f O 2 does not unambiguously support a metasedimentary source.
Indeed, low f O 2 equivalent to that of the Jiuyishan fayalite-bearing. Khin Zaw (). Tectonic settings for the emplacement of granitoid rocks in Myanmar in The Geological Structure, Mineralisation and oxygen isotopes and fluid/melt inclusion studies of the Denchai sapphires, Geochemistry and Tectonic Setting of the Central Loei volcanic rocks, Pak Chom area, Loei, northeastern Thailand: Journal of Asian.
Major element and oxygen isotope geochemistry of vapour-phase garnet from the Topopah Spring Tuff at Yucca Mountain, Nevada, USA. Twenty vapour-phase garnets were studied in two samples of the Topopah Spring Tuff of the Paintbrush Group from Yucca Mountain, in southern Nevada.
Subglacially precipitated carbonates record geochemical interactions and pollen preservation at the base of the Laurentide Ice Sheet on central Baffin Island, eastern Canadian Arctic - Volume 81 Issue 1 - Kurt A. Refsnider, Gifford H. Miller, Marilyn L.
Fogel, Bianca Fréchette, Roxane Bowden, John T. The geochemistry and geochronology of the Proterozoic granitoid rocks from the Natal Structural and Metamorphic Province, southeastern Africa.
Rev. Brasileira de Geoci., 17, p. The sulfur isotope composition of single sulfide grains has been studied taking into account their paragenetic sequence in the samples collected from three hydrothermal fields (Logatchev, Krasnov, and Rainbow), located in the northern part of the Mid-Atlantic Ridge.
The δ34S values of sulfides are + to +6, + to +, and + to + ‰ in the Logatchev, Krasnov, and Rainbow fields. The IUGS- and UNESCO-funded International Geoscience Programme Project # (Neoproterozoic Ice Ages) was conceived to contribute towards a global synthesis of current geological data on the number, duration, extent, causes and consequences of glacial episodes during the Neoproterozoic Era.
IGCP attracted more than scientists from over 30 countries, many of whom provided their regional. A new petrogenetic model for meta-granitic rocks in the central and southern Menderes Massif – W Turkey: Implications for Cadomian crustal evolution within the Pan-African mega-cycle.
Precambrian Research, Vol. Issue., p. Neodymium Isotope Geochemistry An Introduction. Home; Neodymium Isotope Geochemistry An Introduction; Neodymium Isotope Geochemistry An Introduction. pasax; ; 0 Comment. The Banzhusi granite porphyry is located in the Xiong’ershan area, East Qinling orogenic belt (EQOB).
This study presents an integrated whole-rock geochemistry and zircon U-Pb-Hf-O isotope analysis of the Banzhusi granite porphyry. These rocks have metaluminous, high-K alkali-calcic and shoshonitic features and show significant enrichment in light rare earth elements (LREEs) over heavy rare.
Aquamarine of distinctly dark blue colour was discovered during the summer of in the Pelly Mountains, southern Yukon Territory, Canada. The beryl is found within quartz veins that fill sigmoidal tension gashes, which cut a Mississippian syenite.
The True Blue showing is differentiated from other beryl occurrences in the northern Cordillera by the colour of the beryl, host rock, mineral. A contribution to the geochronology of the Precambrian basement of central south Norway \/ Fernando Corfu -- The Sesia-Lanza zone, a slice of subducted continental crust \/ G.V.
Dal Piaz, J.C. Hunziker, and W.B. Stern -- Zircons from the mantle \/ Gordon L. Davis -- The origin of anorthosites: geochemical and isotopic constraints \/ D. Geochemistry, geochronology and Sr–Nd–Hf isotopes of two types of Early Cretaceous granite porphyry dykes in the Sulu orogenic belt, eastern China.
Song-Jie Wang, a b Hans-Peter Schertl, c a Yu-Mao Pang a b. a College of Earth Science and Engineering, Shandong University of Science and Technology, QingdaoChina.
The causal mechanisms of global glaciations are poorly understood. The transition to a Neoproterozoic Snowball Earth after more than 1 Gy without glaciation represents the most dramatic episode of climate change in the geological record. Here we present new Re-Os geochronology, which, together with existing U-Pb ages, reveal that the glacial period in northwest Canada lasted ∼55 My.
The Bulage Pb–Zn deposit is a typical hydrothermal vein‐type deposit located in the central part of the EDMB (Figure 1b) and was discovered in by the Inner Mongolia Shandong Gold Geological Minerals Survey, Chifeng, China.
The mineralization is thought to have been controlled by fractures and is spatially closely related to quartz diorite, but the genetic relationship between the.
Isotope Geochemistry: 2: Research Associate: School of Environmental Sciences: Jawaharlal Nehru University, New Delhi: Geochemistry: 3: Post-doctoral fellow: Department of Earth and Space Sciences: State University of New York at Stony Brook, USA: Isotope Geochemistry.
The S and I granitoid rocks from southeastern Australia are readily distinguished by their oxygen isotope ratios and, in addition, a good correlation exists between the â ¢D values and water contents of these rocks (O!Neil anâ ¢ in southern Nevada.
depleted rocks FQrester and Taâ ¢lor of Mull (, ) made detailed studies of the â. Neodymium Isotope Geochemistry An Introduction. Posted on by beli. The applied isotope geochemistry (aig) working group of the international association of geochemistry (iagc) organizes highly successful biennial conferences focused broadly on the emerging field of applied isotope geochemistry and biogeochemistry.
Most recently, aig was held in conjection with wri in tomsk, russia as part of the 1st iagc. Geology of the eastern Lake Laberge area (E), south-central Yukon.
Yukon Geological Survey, Open Filep. Manor, M.J., and Piercey, S.J., Geochemistry of Devono–Mississippian volcanic and intrusive rocks of the Finlayson Lake district, Yukon-Tanana terrane, Yukon.
Neodymium isotope geochemistry of felsic volcanic and intrusive rocks from the Yukon-Tanana terrane in the Finlayson Lake region, Yukon, Canada.
Canadian Journal of Earth Sciences, 40, Selby, D., and Creaser R.A. ().Petrology and Nd-Hf isotope geochemistry of VMS-related felsic rocks and crustal growth of the northern Canadian Cordillera, Yukon: Dylan McKevitt: CAD$4, Laurentian University: Geology and Geochemistry of Mafic-Ultramafic Sills in the Northern Permits, Raglan Ni-Cu-(PGE) District, Cape Smith Belt, Nunavik, Québec: Xuyang Meng: CAD$5,Oxygen and U-Th isotopes and the timescales of hydrothermal exchange and melting in granitoid wall rocks at Mount Mazama, Crater Lake, Oregon We report new whole rock U-Th and in-situ oxygen isotope compositions for partially melted (0–50 vol% melt), low-δ18O Pleistocene granitoid blocks ejected during the ∼ ka caldera-forming eruption.