A5066638967- Geological and Geochemical Analysis
- Geochemistry and Geologic Mapping
- Archaeology and ancient environmental studies
- Metallurgy and Cultural Artifacts
- Paleontology and Stratigraphy of Fossils
- Geochemistry and Elemental Analysis
- Mineralogy and Gemology Studies
- earthquake and tectonic studies
- Diverse Educational Innovations Studies
- Ancient and Medieval Archaeology Studies
- Geology and Paleoclimatology Research
- Geological formations and processes
- Cultural Heritage Materials Analysis
- Maritime and Coastal Archaeology
- Geological Studies and Exploration
- Hydrocarbon exploration and reservoir analysis
- Ancient Mediterranean Archaeology and History
- Indigenous and Place-Based Education
- High-pressure geophysics and materials
- Pleistocene-Era Hominins and Archaeology
- Forensic Anthropology and Bioarchaeology Studies
- Educational Research and Pedagogy
- Science Education and Pedagogy
- Art Education and Development
- Historical and Archaeological Studies
The Graduate Center, CUNY
2014-2025
Brooklyn College
2016-2025
Institute of Archaeology
2020
Juniata College
2020
City University of New York
2000-2018
American Museum of Natural History
2006-2017
Concurrent Technologies Corporation
2006
University of Calgary
1996-2001
Queen's University
1991-1993
Oklahoma State University
1983
Regional metamorphism, ranging in grade from the subgreenschist-facies to greenschist–amphibolite-facies transition, affects all Archean supracrustal rocks (>2677 Ma) Rouyn–Noranda area. Contact metamorphic minerals associated with posttectonic Preissac–Lacorne batholith (2643 show no evidence of a regional retrograde event. Accordingly, age metamorphism can be bracketed between 2677 and 2643 Ma. Three reaction isograds were mapped metabasites, dividing low-grade into three zones:...
This paper provides the first comprehensive sourcing analysis of tin ingots carried by well-known Late Bronze Age shipwreck found off Turkish coast at Uluburun (ca. 1320 BCE). Using lead isotope, trace element, and isotope analyses, this study demonstrates that ores from Central Asia (Uzbekistan Tajikistan) were used to produce one-third ingots. The remaining two-thirds derived Taurus Mountains Turkey, namely, stream residual low-grade mineralization after extensive exploitation in Early...
Published Sn isotope data along with 150 new analyses of cassiterite and four granite constrain two major tin fractionation steps associated (1) separation from the magma/orthomagmatic transitional environment (2) hydrothermal activity. A distinct difference across deposit type, geological host rocks, time ore formation demonstrates that in mean δ124Sn value represents operation a unified process. The lower values present both residual igneous rocks pegmatite suggest heavier isotopes were...
Metamorphosed silty mudstones of the Burgess Shale and Stephen formations record a poly metamorphic history. An early greenschist-facies event associated with burial by Paleozoic strata produced nearly ubiquitous bedding-parallel cleavage (S 1 ). Tectonic exhumation during formation southern Canadian Rocky Mountains domainal subgreenschist-facies retrograde overprint in which high-angle crenulation 2 ) was developed. Whereas all rocks have experienced these two events, degree deformation...
Increased interest in the fractionation of Sn isotopes has led to development several techniques for preparing cassiterite (SnO 2 , primary ore Sn) isotopic analysis. Two distinct methods have been applied recent studies cassiterite: (a) reduction tin metal with potassium cyanide ( KCN ) at high temperature (800 °C), subsequent dissolution HC l, and (b) a solution hydriodic acid HI low (100 °C). This study compares effectiveness accuracy these two contributes additional methodological...
Abstract Mineral equilibria in the system CaO–MgO–Al 2 O 3 –SiO –H provide a basis for mapping of four reaction isograds and one bathograd low‐pressure transition from subgreenschist to greenschist facies. Most Matachewan area Abitibi greenstone belt is lower‐pressure bathozone, as indicated by widespread occurrences subassemblage Prh–Chl. The higher‐pressure bathozone two Pmp–Act–Ep–Qtz, but these samples displaced anomalously low pressure high Fe content coexisting minerals. This...
A redox reaction in which Sn2+ oxidizes to Sn4+ is thought occur during the precipitation of cassiterite (SnO2) and stannite (Cu2FeSnS4) from high-temperature hydrothermal solutions. In four stanniferous regions with differing mineralization environments (South Dakota, U.S.A.; Cornwall, England; Erzgebirge, Germany/Czech Republic; Andean tin belt, Bolivia), isotope composition (mean value δ124Sn = –1.47 ± 0.54‰, n 21) consistently more fractionated toward negative values than that...
Tin is a rare metal that essential for making bronze, the defining technology of Bronze Age. The source(s) tin Aegean bronze undetermined but several small Age mines have been documented in circum‐Aegean region. discovery archaeological sites West Serbia near placer deposit on flanks Mt. Cer led to an investigation this site as potential additional mine Geochemical prospecting stream sediments flowing from allowed categorization streams based relative grade. grade highest Milinska River,...
The origin of chalcocite is explored through a comparison the copper isotope values this mineral from supergene enrichment, sedimentary copper/red bed, and high-temperature hypogene mineralization around world. Data literature data presented here <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" id="M1"><mml:mo stretchy="false">(</mml:mo><mml:mi>n</mml:mi><mml:mo>=</mml:mo><mml:mn fontstyle="italic">361</mml:mn><mml:mo stretchy="false">)</mml:mo></mml:math> reveal that has tightest...
Middle Cambrian basinal strata along the Kicking Horse Rim, including Burgess Shale Formation, contain lenses of black, thin-bedded, noncalcareous, geochemically anomalous chloritic rock. The have extremely high MgO concentrations (up to 31 wt %), or less commonly are enriched in Ba 1,680 ppm), which contrasts with surrounding where and content low. Location paleotopographic lows, proximity ancient submarine Escarpments, association syneresis cracks, distinct major element patterns, fluorine...
The main objective of this paper is to present several constructions free products in the class abelian /-groups which are sufficiently concrete allow for an depth examination their structure.Some applications these discussed, and it shown that /-group satisfy subalgebra property.Further, some questions on over group considered a variety either or contains representable /-groups.Finally, general observation made about countable chains disjoint sets algebras.PROPOSITION 2.1.Let L be l-group...
Thermal histories in the Abitibi and Pontiac subprovinces vary for three general domains: (1) zones of impermeable rock with cooling rates >8 °C/Ma; (2) that are spatially associated monzogranite plutons, apparent 1–2 (3) permeable high-strain <l °C/Ma. Evidence multiple hydrothermal events fault includes most age spectra having a disturbed form; concave-down samples from subgreenschist-facies faults, indicating episodes white mica growth; Cr-muscovite greenschist-facies segment Larder...
Abstract This study identifies the lead ores used to produce artifacts by Romans between first and eighth centuries AD during construction of fort then town Novae (N. Bulgaria). For this purpose, samples were taken from pipes, joints columns pedestals, a ingot. The analyzed for isotopes results compared literature data Roman mines what is now Bulgaria, Greece, North Macedonia, Montenegro, Bosnia Herzegovina, Italy, Germany, Romania. Pb isotope indicate that earlier stages Novae's...