BGYCT-135 IGNOU Solved Assignment 2026-27

BGYCT-135 Solved Assignment: Petrology TMA (Digital PDF) Overview

The BGYCT-135 Petrology TMA solutions are designed to meet the 30% course weightage requirement for the Bachelor of Science (BScG) program under IGNOU’s School of Sciences. Each block aligns with the official curriculum (verified via eGyanKosh) and includes plagiarism-free, university-approved answers formatted to exact word limits.

Key Syllabus Units Covered

• Block-1: Igneous Petrology I
  • Classification of igneous rocks using QAPF diagram and modal analysis
  • Crystal fractionation and Bowen’s reaction series with field examples (e.g., granites, basalts)
  • Textural studies of plutonic vs. volcanic rocks (e.g., pegmatites, porphyries)
• Block-2: Igneous Petrology II
  • Geochemical trends: Major oxides (SiO₂, Al₂O₃, Fe₂O₃) and trace elements in mafic/felsic rocks
  • Origin of alkaline and ultramafic rocks (e.g., kimberlites, peridotites)
  • Experimental petrology: Phase equilibria and pressure-temperature conditions
• Block-3: Sedimentary Petrology
  • Clastic vs. chemical sedimentary rocks: Classification (e.g., sandstone, limestone)
  • Diagenesis and lithification processes with case studies (e.g., coal formation)
  • Stable isotope geochemistry in sedimentary environments (δ¹³C, δ¹⁸O)
• Block-4: Metamorphic Petrology
  • Metamorphic facies series (e.g., greenschist, amphibolite) and index minerals
  • Pressure-temperature (P-T) paths and metamorphic gradients
  • Retrograde metamorphism and fluid-rock interactions

Assignment Structure & FAQs

Q: Are solutions provided for both English and Hindi mediums? A: Yes. The PDF includes verified answers in both languages with translated terminology (e.g., ‘ ’ for Igneous Petrology) while retaining scientific precision.

Q: How do I verify the word limits for short-answer questions? A: Each solution block explicitly labels word counts (e.g., ‘500 words’ for essay-type questions, ‘100 words’ for definitions). The PDF also highlights mandatory sub-questions per IGNOU’s rubric.

Submission Compliance

The assignment adheres to the current academic session’s deadlines (e.g., TMA-01: 31st October, TMA-02: 30th April) and includes:

• Digitally formatted PDF with scanned answer sheets (if required)
• Cross-referenced with IGNOU’s Study Material (2nd Edition) for Block-1 to Block-4
• FAQs on plagiarism checks and referencing formats (APA/IGNOU style)