Diah Morestika Nur Afifah

Experience

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  Universitas Gadjah Mada (UGM)

  Aug 2017 - Feb 2018

  Geochemistry Laboratory Assistant (Sub Basic Chemistry)

  • Provided comprehensive instruction and guidance on fundamental chemistry concepts, including composite equations, system entropy, elemental valence, colorimetry, and fluid characteristics, to a group of 120 engaged learners.• Offered constructive feedback on assignments, resulting in a high level of knowledge retention among learners, with 95% achieving a score of 3.00 or higher.

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  Universitas Gadjah Mada (UGM)

  Jun 2018 - Nov 2018

  Geological Mapping Project Researcher

  A geological map of Ngawi, East Java, Indonesia, was created at a scale of 1:25,000, covering an area of 20 square meters. The analysis included outcrop observations, geomorphological analysis, stratigraphic correlation, structural analysis, thin section petrographic analysis, paleontological analysis, and geological/historical reconstruction of the area.

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  Universitas Gadjah Mada (UGM)

  Aug 2019 - Aug 2020

  - Led and demonstrated field geological designs, including procedures and techniques for creating geological maps, to a group of 102 learners.- Provided feedback on assignments, with 91% of learners achieving a score of 3.00 or higher. • Provided comprehensive explanations and assistance regarding the geology of mineral resources, including ore textures, epithermal deposits, porphyry, skarn, and industrial minerals, to a group of 80 learners.• Distributed assignments and organized a field trip to enhance the learners' understanding of real-world scenarios. The field trip took place in Trenggalek, East Java Province, with 80 learners participating.

  • Dynamic Geology Laboratory Assistant (Sub Field Geology Methods)

    Feb 2020 - Aug 2020

  • Mineral Resource Laboratory Assistant (Sub Geology of Mineral Resources)

    Aug 2019 - Feb 2020
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  PT. SEBUKU IRON LATERITIC ORES

  Dec 2020 - Sept 2022

  Database Geologist

  • Managed and directed exploration drilling operations, including the creation of a comprehensive drilling plan database.• Conducted detailed logging of samples, ensuring accurate and consistent data collection.• Implemented rigorous QAQC assay procedures to maintain data integrity and reliability.• Controlled and validated the integrity of the assay database, ensuring the accuracy and consistency of data.• Compiled and validated composite data to support resource estimation.• Utilized 3DMines software to create block models and estimate potential mineral resources. Show less

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  PT Sulawesi Cahaya Mineral

  Sept 2022 - now

  • Gather, compile, and integrate all geological exploration data (lithology, geotech logs, survey, DDR, traverse, observation points, field descriptions, photos, MC, density) into a structured and centralized database system.• Validate and quality-check geological datasets (collar, lithology, survey, DDR, traverse, observation points, field descriptions, photos, MC, density) to ensure data precision, consistency, and modeling readiness.• Supervise geochemical laboratory operations, including sample preparation, analysis, and reporting systems, ensuring QAQC compliance and consistent analytical performance.• Coordinate the routine dispatch of samples to laboratories, verifying sample quantities and identification accuracy according to DPO and QAQC documentation.• Generate downhole profiles and validate general layers to support geological model updates and resource evaluation.• Compile, manage, and maintain records of coarse and pulp sample storage to ensure traceability and well-organized physical archives.• Prepare documentation, recapitulation, and verification for laboratory analysis invoices, ensuring accurate reporting and cost validation.• Ensure consistent implementation of EHS principles across data management, sample storage, and laboratory operations. Show less • Collect, compile, and integrate all geochemical/assay data (Ni, Co, Fe₂O₃, MgO, Cr₂O₃, Al₂O₃, etc.) into a centralized and reliable database system.• Validate and process assay data through QAQC standards to ensure data accuracy, precision, and consistency.• Supervise laboratory geochemical analysis results and ensure analytical integrity (ROA).• Coordinate the dispatch of duplicate and umpire samples to laboratories and manage corresponding QAQC documentation.• Conduct QAQC audits on sample preparation and analytical procedures to verify compliance with technical standards.• Generate and manage geological layers derived from assay results for resource modeling and domain characterization.• Prepare recapitulation reports and cost calculations for umpire and duplicate analyses.• Ensure strict compliance with EHS principles and company standards in all QAQC and database management activities. Show less

  • Database – Processing & Validation Senior Geologist

    Sept 2025 - now

  • Database QAQC Geologist

    Mar 2023 - Nov 2025

  • Research Geologist

    Sept 2022 - Feb 2023