The Identification of Sources of Chert Artifacts

1979 ◽  
Vol 44 (4) ◽  
pp. 744-757 ◽  
Author(s):  
Barbara E. Luedtke
Keyword(s):  
Discriminant Analysis ◽  
Trace Element ◽  
Trace Element Analysis ◽  
Trace Element Composition ◽  
Element Composition ◽  
Intermediate Step ◽  
Element Analysis ◽  
Original Source ◽  
Archaeological Materials ◽  
Analytical Procedures

Trace element analysis is a widely used procedure for determining the original source of archaeological materials. Although many articles have discussed analytical procedures and archaeological applications of the results, comparatively little attention has been given to the intermediate step of determining the appropriate procedure for assigning an artifact to a source once the trace element composition of both is known. This paper discusses several different procedures for assigning artifacts to sources and compares these procedures on the basis of their accuracy and the types of identification errors they make. Special attention is paid to discriminant analysis, which appears to be the best procedure for identifying sources of chert artifacts.

Sample Preparation and Trace Element Analysis of the Shell Layers of a Recent Oyster Crassostrea virginica

1974 ◽  
Vol 32 ◽  
pp. 456-457
Author(s):  
S. C. Hastings
Keyword(s):  
Sample Preparation ◽  
Trace Element ◽  
Visual Recognition ◽  
Trace Element Analysis ◽  
Trace Element Content ◽  
Temporal Variations ◽  
Trace Element Composition ◽  
Polished Surface ◽  
Element Analysis ◽  
The Individual

This study was conducted in order to determine the best method of sample preparation for microprobe analysis of the trace element content of the Recent oyster Crassostrea vlrglnlca. Ordinarily, a flat and polished surface provides the best results in X-ray techniques. However, examination of individual shell layers requires a method that allows visual recognition of the shell structure while still providing the flattest surface possible for micro-probe analysis. If, in response to its environment, the oyster incorporates trace elements into its shell as the dally growth layers are secreted, analysis of the individual shell layers will provide a record of environmental and temporal variations in the trace element composition of the surrounding waters.

scholarly journals The Provenance of Arsenic in Southeast Asia Discovered by Trace Elements in Groundwater from the Lowlands of Nepal

2021 ◽  
Author(s):  
Barbara Mueller
Keyword(s):  
Trace Elements ◽  
Southeast Asia ◽  
Ground Water ◽  
Trace Element ◽  
Clay Minerals ◽  
Trace Element Composition ◽  
Element Composition ◽  
Original Source ◽  
Mafic Rocks ◽  
Felsic Rocks

Arsenic concentrations in groundwater extracted from quaternary alluvial sediments pose a serious health issue for inhabitants living in several countries in Southeast Asia. A widely approved hypothesis states that reductive dissolution of Fe-bearing minerals releases As oxyanions to ground water and the original source of As has to be located in mafic rocks occurring across the entire Himalayan belt. Yet, recent trace element analyses of ground water from the lowlands (Terai) of Nepal show a clear decoupling of As and Fe. The positive correlation of K, Na, and trace elements like Li, B, and Mo with arsenic points out to clay minerals hosting the toxic element. This pattern of trace elements found in the ground water of the Terai also advocates against an original source of As in mafic rocks. The lithophile elements like Li, B, P, Br, Sr, and U reflect trace element composition typical for felsic rocks as an origin of As. All the mentioned elements are components of clay minerals found ubiquitously in some of the most characteristic felsic rocks of the Nepal Himalaya: metapelites and leucogranites—all these rocks exhibiting a high abundance of especially B, P, and As besides Cd and Pb.

Reconstructing sea turtle ontogenetic habitat shifts through trace element analysis of bone tissue

2019 ◽  
Vol 608 ◽  
pp. 247-262 ◽  
Author(s):  
MD Ramirez ◽  
JA Miller ◽  
E Parks ◽  
L Avens ◽  
LR Goshe ◽  
...  
Keyword(s):  
Trace Element ◽  
Bone Tissue ◽  
Trace Element Analysis ◽  
Sea Turtle ◽  
Element Analysis ◽  
Ontogenetic Habitat Shifts

Trace Element Analysis of Fusel Oil by Microwave-Induced Plasma Optical Emission Spectrometry

2017 ◽  
Vol 13 (6) ◽  
Author(s):  
Daniel Araujo Goncalves ◽  
Tina McSweeney ◽  
Mirian Cristina dos Santos ◽  
Marco A. Utrera Martines ◽  
Luiz Francisco Malmonge ◽  
...  
Keyword(s):  
Trace Element ◽  
Trace Element Analysis ◽  
Optical Emission ◽  
Optical Emission Spectrometry ◽  
Emission Spectrometry ◽  
Element Analysis ◽  
Fusel Oil ◽  
Microwave Induced Plasma ◽  
Plasma Optical Emission Spectrometry
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