Integrated interpretation of pXRF data on ancient nephrite artifacts excavated from Tomb No.1 in Yuehe Town, Henan Province, China

Previous studies of ancient jade using portable X-ray fluorescence (pXRF) have mostly focused on mineral identification, alteration status and provenance determination. It is usually used as an auxiliary instrument for spectroscopic detection with finer resolution. However, there is no substitute for the efficiency and stability of pXRF in-situ non-destructive analysis, which is less affected by the test environment. The scale of the data from the pXRF analysis did not allow for a more in-depth interpretation of ancient jade in the past. In this study, pXRF has been carried out for a total of 112 pieces of nephrite artifacts unearthed from the Yuehe tomb No.1 in Nanyang City, Henan Province, Central China. Certain patterns become clearer as the size of the data increases. The coefficient of variation, cluster analysis and correlation analysis can be used to separate elements into different assemblages, revealing whether the elements are from the primary and impurity minerals of nephrite itself, from the burial microenvironment in the soil, or even from other specific sources. In addition, most of the secondary whitening occurring in the batch of nephrite are accompanied by an increase in Ca content, confirming the previously refuted theory of calcification. More importantly, the principal component analysis of the twin nephrite artifacts suggests visually indistinguishable elemental changes caused by secondary changes, which may lead to misjudgment of ancient nephrite provenance using elemental data.

Leitura: o papel da memória de longo termo (MLT) no processo de interpretação

Este artigo apresenta os resultados de uma pesquisa sobre Dificuldades de leitura entre acadêmicos de Letras, a partir da análise das paráfrases por eles produzidas, após a leitura silenciosa de uma crônica. O objetivo foi avaliar a interpretação leitora dos estudantes da amostra considerada. A análise embasou-se no Modelo Pragmático Integrado de interpretação/compreensão (DASCAL, 2006) e os resultados da investigação desenvolvida entre o 2º semestre de 2015 e o 1º de 2016 evidenciaram dificuldade de articulação entre texto e contexto, como também a necessidade de investigar mais detidamente os vínculos entre memória de longo termo (MLT) e o processo de interpretação leitora, uma vez que o maior problema detectado concerniu à falta de mobilização do conhecimento prévio (extralinguístico e metalinguístico). As demais dificuldades foram o léxico pouco desenvolvido e a falta de nexos textuais ou seu emprego inadequado. Por fim, embora a pesquisa tenha sido exploratória e seus resultados não possam ser generalizados sem investigações adicionais, constatamos haver estreita relação entre dificuldades de interpretação leitora e produção de paráfrases reprodutoras.This article presents the results of an investigation on Reading Difficulties among students of Letters based on the paraphrases produced by them after the silent reading of a chronicle. The objective was to evaluate the students’ process of reading interpretation. The analysis was based in the Pragmatic Model of Integrated interpretation/understanding (DASCAL, 2006) and the results of the research developed in 2015/2016 showed difficulty of articulation between text and context, as well as the need to investigate the links between long term memory (MLT) and the interpretation process, since the biggest problem detected was concerned to the difficulty to mobilize previous knowledge (extralinguistic and metalinguistic).Other difficulties highlighted were the lexicon little developed and the lack of nexus or its inadequate use between sentences and paragraphs. Finally, although the study was exploratory and their results cannot be generalized without further investigations, we conclude that there was a close relationship between reading interpretation difficulties and poor paraphrases.Keywords: reading, memory, interpretation, paraphrase.

Integrated Interpretation of pXRF Data on Ancient Nephrite Artifacts Excavated from Tomb No.1 in Yuehe Town, Henan Province, China

Previous studies of ancient jade using portable X-ray fluorescence (pXRF) have mostly focused on mineral identification, alteration status and provenance determination. It is usually used as an auxiliary instrument for spectroscopic detection with finer resolution. However, there is no substitute for the efficiency and stability of pXRF in-situ non-destructive analysis, which is less affected by the test environment. The scale of the data from the pXRF analysis did not allow for a more in-depth interpretation of ancient jade in the past. In this study, pXRF has been carried out for a total of 112 pieces of nephrite artifacts unearthed from the Yuehe tomb No.1 in Nanyang City, Henan Province, Central China. Certain patterns become clearer as the size of the data increases. The coefficient of variation, cluster analysis and correlation analysis can be used to separate elements into different assemblages, revealing whether the elements are from the primary and impurity minerals of nephrite itself, from the burial microenvironment in the soil, or even from other specific sources. In addition, most of the secondary whitening occurring in the batch of nephrite are accompanied by an increase in Ca content, confirming the previously refuted theory of calcification. More importantly, the principal component analysis of the twin nephrite artifacts suggests visually indistinguishable elemental changes caused by secondary changes, which may lead to misjudgment of ancient nephrite provenance using elemental data.

GPR Data Interpretation Approaches in Archaeological Prospection

This article focuses on the possible drawbacks and pitfalls in the GPR data interpretation process commonly followed by most GPR practitioners in archaeological prospection. Standard processing techniques aim to remove some noise, enhance reflections of the subsurface. Next, one has to calculate the instantaneous envelope and produce C-scans which are 2D amplitude maps showing high reflectivity surfaces. These amplitude maps are mainly used for data interpretation and provide a good insight into the subsurface but cannot fully describe it. The main limitations are discussed while studies aiming to overcome them are reviewed. These studies involve integrated interpretation approaches using both B-scans and C-scans, attribute analysis, fusion approaches, and recent attempts to automatically interpret C-scans using Deep Learning (DL) algorithms. To contribute to the automatic interpretation of GPR data using DL, an application of Convolutional Neural Networks (CNNs) to classify GPR data is also presented and discussed.

The geophysical signature of Oyut deposits, Oyu Tolgoi, Mongolia

The well-known Oyu Tolgoi Cu-Au group deposits can be divided into three main deposits: Hugo Dummett deposit (Hugo North and Hugo South), Oyut deposits (South Oyu, Southwest Oyu and Central Oyu), and Heruga deposit in the south. These deposits sit along 26 km long, north-northeast trending belt termed as the Oyu Tolgoi trend. This paper reviews investigations on geophysical signatures of the South Oyu, Southwest Oyu and Central Oyu deposits and compares geophysical models of the mineral deposits with their lithology, alteration, mineralization, and structures. A variety of datasets including induced polarization, ground magnetic, gravity survey are used in the study and generated inversion products of ground magnetic and gravity data with integrated interpretation. Typical responses from the Oyut deposits are: up to 0.1 mGal positive gravity anomaly above background, 100–200 nT low or high magnetic anomaly compared to background depending on the geological situations, and from 12 mV/V to 30 mV/V chargeability anomalies and low resistivity signatures from 100 ohm.m to 400 ohm.m. The interpreted geological-geophysical models of porphyry Cu-Au deposits presents in this study have emphasis on integrated interpretation of geophysical techniques, and inversions of gravity and magnetic data in gold rich porphyry copper system.

INTEGRATION POTENTIAL OF MICROSEISMIC ANALYSIS AND GEOPHYSICAL METHODS. GAS CONDENSATE FIELD CASE STUDY

This study is devoted to an analysis of microseisms registered on gas-condensate field area. Presence of seismic emission effect on a part of the area is demonstrated. A microseismic anomaly is outlined in NW part of the area and proves correct by 3 seismic CDP profiles and interpreted as a reservoir. The results of the special processing was compared to the results of a set of other geophysical methods. Correlation between the found anomaly and an anomaly found with aerogamma-specrtometry is shown. The results can be used in an integrated interpretation of geophysical data for oil and gas reservoirs of both structural as nonstructural types.

PREDICTION OF THE LITHOLOGICAL COMPOSITION OF THE BAZHENOV FORMATION BASED ON INTEGRATED INTERPRETATION OF GEOLOGICAL AND GEOPHYSICAL MATERIALS (ON THE EXAMPLE OF CROSS-SECTIONS IN THE NORTHERN REGIONS OF KHANTY-MANSI AUTONOMOUS AREA)

The article presents a methodology developed by the authors for calculating the lithological composition of the Bazhenov Formation in Western Siberia. It is based on the identified relationships between the mineral-component composition and physical properties of rocks. The physical meaning of the identified connections has been substantiated. Satisfactory convergence of the calculated values and core data is shown. Possibilities of using the developed technique in wells not characterized by core material and limitations for its application are described.