نتایج جستجو برای: lithogeochemical data

تعداد نتایج: 2410184  

Journal: :Frontiers in Earth Science 2023

Trace element (TE) analysis of pyrite via LA-ICP-MS can be used to reconstruct the conditions formation in complex mineral systems. The Carpentaria province northern Australia is host some world’s highest value Zn-Pb (+Ag, Cu) deposits. genesis many these deposits controversial, with competing models single-vs. multi-stage ore formation. In this study, data paragenetically constrained from Geor...

Journal: :Mineralium Deposita 2021

Abstract Unravelling the genesis of metamorphosed mineral deposits can be complicated due to difficulties in separating between primary features and that formed during metamorphic overprint. Such uncertainty exists for stratabound dolomite- skarn-hosted Zn-Pb-Ag sulfide 1.89 Ga rocks Bergslagen lithotectonic unit (BLU) Sweden, where a metasomatic vs. regional origin skarns has long been discuss...

پایان نامه :وزارت علوم، تحقیقات و فناوری - دانشگاه اصفهان - دانشکده زبانهای خارجی 1389

this study was conducted to investigate the impact of portfolio assessment as a process-oriented assessment mechanism on iranian efl students’ english writing and its subskills of focus, elaboration, organization, conventions, and vocabulary. out of ninety juniors majoring in english literature and translation at the university of isfahan, sixty one of them who were at the same level of writing...

پایان نامه :وزارت علوم، تحقیقات و فناوری - دانشگاه پیام نور - دانشگاه پیام نور استان تهران - دانشکده علوم انسانی 1390

this study was designed and conducted to find out if there is any significant relationship between iranian efl learners preferance for one of the three degrees of obtrusiveness in foreign language instruction (focus on form, forms and meaning) and their preferred experiential learing style. to collect the data two questionnaires were used. the first one on the degree of obtrusiveness and the se...

پایان نامه :وزارت علوم، تحقیقات و فناوری - دانشگاه کاشان - دانشکده ادبیات و زبانهای خارجی 1392

ذٌف و اٍیی وگارش مثاحث ای در زتان اوگلیسی ایه است ک مردم را متقاعذ کیذ. ایه تحقیق تر تررسی وگارش مثاحث ای مذل آقای ت لُمیه تمرکس می کیذ داوطج یُان رضت ی زتان اوگلیسی داوطگای کاضان را م رُد مطالع قرار دادی تا کیفیت وگارش مثاحث ای ایه داوطج یُان را پیص تییی ومایذ. ترای پی تردن ت اییک ایه داوطج یُان چ عیاصر مثاحث ایی را تیطتر در وگارش خ دُ استفادی می کییذ مٌچییه تحلیل تفا تَ مثاحث تیه جیسیت رضت ی تحصیلی...

پایان نامه :وزارت علوم، تحقیقات و فناوری - دانشگاه اصفهان - دانشکده زبانهای خارجی 1390

this study was conducted to investigate the impact of podcasts as a learning and teaching tool on iranian efl learners’ motivation for listening as well as on their listening comprehension ability. the study also investigated the learners’ perception towards listening to podcasts and examined whether the learners were likely to accept podcasts. out of fifty-five intermediate learners studying e...

Journal: :Journal of Geochemical Exploration 2022

This contribution presents an application of principal component analysis (PCA) and K-means clustering as tools for data dimension reduction grouping multivariate, whole-rock lithogeochemical data. The study dataset consists 64 geochemical variables measurements spectrophotometric brightness determined from 181 dolomite marble samples, collected at various distance two contrasting types mineral...

In geochemical exploration, there are various techniques such as univariate and multivariate statistical methods available for recognition of anomalous areas. Univariate techniques are usually utilized to estimate the threshold value, which is the smallest quantity among the values representing the anomalous areas. In this work, a combination of the Sequential Gaussian Simulation (SGS) and Gap ...

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