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Geological and Geochemical Analysis
Research Guide
What is Geological and Geochemical Analysis?
Geological and Geochemical Analysis is the study of tectonic evolution, geochronological processes, and orogenic events through zircon geochemistry, isotopic composition, and thermodynamic modeling, focusing on subduction zones, mantle evolution, plate tectonics, and continental crust growth.
This field encompasses 366,769 works on topics including zircon geochemistry, geochronology, tectonics, granitic rocks, isotopic composition, subduction zones, mantle evolution, plate tectonics, thermodynamic modeling, and continental growth. Shen‐Su Sun and W. F. McDonough (1989) analyzed trace-element data for mid-ocean ridge basalts (MORBs) and ocean island basalts (OIB) to establish chemical systematics, suggesting incompatibility orders such as Cs ≈ Rb ≈ Ba > Th > U ≈ Nb = Ta ≈ K. Julian A. Pearce, Nigel Harris, and A. G. Tindle (1984) subdivided granites into ocean ridge granites (ORG), volcanic arc granites (VAG), within plate granites (WPG), and collision granites (COLG) using trace element discrimination diagrams.
Topic Hierarchy
Research Sub-Topics
Zircon Geochronology
This sub-topic applies U-Pb dating of zircon crystals to establish magmatic and metamorphic ages in orogenic belts. Researchers integrate LA-ICP-MS and SIMS techniques for high-precision timescales.
Geochemical Discrimination of Tectonic Settings
This sub-topic develops trace element and isotopic diagrams to classify granitic rocks from arc, collision, or anorogenic settings. Researchers validate against modern analogs and ancient terranes.
Subduction Zone Geochemistry
This sub-topic studies fluid-mobile elements and isotopes tracing slab dehydration and mantle wedge metasomatism. Researchers model volatile transfer in convergent margins.
Continental Crust Growth Models
This sub-topic debates vertical vs. horizontal growth mechanisms using Hf isotopes in zircon and whole-rock compositions. Researchers quantify crustal differentiation over Earth history.
Mantle Evolution Isotopes
This sub-topic traces mantle heterogeneity via Os, Hf, and Nd isotopes in basalts and komatiites. Researchers model plumes, recycling, and ancient reservoirs.
Why It Matters
Geological and Geochemical Analysis enables tectonic interpretation of granitic rocks, supporting mineral exploration as in Western Australia's Exploration Incentive Scheme where analysis of thousands of geological samples identified a chemical signature for a geoscientific breakthrough potentially sparking a gold rush. Shen‐Su Sun and W. F. McDonough (1989) provided chemical systematics for oceanic basalts with 24,744 citations, informing mantle composition models used in subduction zone studies. Julian A. Pearce, Nigel Harris, and A. G. Tindle (1984) developed trace element diagrams cited 8,341 times to classify granites into ORG, VAG, WPG, and COLG groups, applied in identifying copper mineralization anomalies from stream sediment data in the Baiyin district involving 12 elements (Ag, Ba, Cd, Co, Cu, Hg, Mn, Mo, Ni, Pb, Sb, Zn). W. F. McDonough and Shen‐Su Sun (1995) detailed Earth composition with 13,286 citations, aiding continental crust growth assessments as in Roberta L. Rudnick and Shan Gao (2003). These methods support ARPA-E funding for rare earth element analysis and multi-phase drilling programs like Giant Mining's up to 10,000-foot exploration using geochemistry databases.
Reading Guide
Where to Start
"Chemical and isotopic systematics of oceanic basalts: implications for mantle composition and processes" by Shen‐Su Sun and W. F. McDonough (1989) because it provides foundational trace-element data and incompatibility orders for MORBs and OIB, central to understanding mantle processes with 24,744 citations.
Key Papers Explained
Shen‐Su Sun and W. F. McDonough (1989) established oceanic basalt systematics, which W. F. McDonough and Shen‐Su Sun (1995) extended to whole-Earth composition (13,286 citations), informing Roberta L. Rudnick and Shan Gao (2003) on continental crust (6,219 citations) and K. H. Wedepohl (1995) refinements (6,130 citations). Julian A. Pearce, Nigel Harris, and A. G. Tindle (1984) built tectonic discrimination for granites (8,341 citations) on these compositions, while Τ. N. Irvine and W R A Baragar (1971) and M. J. Le Bas et al. (1986) provided volcanic classification frameworks (7,237 and 6,474 citations) linking to subduction and plate tectonics.
Paper Timeline
Most-cited paper highlighted in red. Papers ordered chronologically.
Advanced Directions
Recent preprints apply machine learning to organic geochemistry in Archean rocks for photosynthesis timing and remote sensing with statistical uncertainty for geological analysis. News highlights matrix factorization for geochemical process extraction via forward modeling and manifold learning for copper anomaly detection in Baiyin district sediments. Journal of Geochemical Exploration reports 20 days to first decision and 195 days submission to acceptance, with ARPA-E funding for rare earth analysis.
Papers at a Glance
| # | Paper | Year | Venue | Citations | Open Access |
|---|---|---|---|---|---|
| 1 | Chemical and isotopic systematics of oceanic basalts: implicat... | 1989 | Geological Society Lon... | 24.7K | ✕ |
| 2 | The composition of the Earth | 1995 | Chemical Geology | 13.3K | ✕ |
| 3 | Trace Element Discrimination Diagrams for the Tectonic Interpr... | 1984 | Journal of Petrology | 8.3K | ✓ |
| 4 | New empirical relationships among magnitude, rupture length, r... | 1994 | Bulletin of the Seismo... | 7.5K | ✕ |
| 5 | A Guide to the Chemical Classification of the Common Volcanic ... | 1971 | Canadian Journal of Ea... | 7.2K | ✕ |
| 6 | The IntCal20 Northern Hemisphere Radiocarbon Age Calibration C... | 2020 | Radiocarbon | 6.9K | ✓ |
| 7 | A Chemical Classification of Volcanic Rocks Based on the Total... | 1986 | Journal of Petrology | 6.5K | ✕ |
| 8 | Early Proterozoic climates and plate motions inferred from maj... | 1982 | Nature | 6.3K | ✕ |
| 9 | Composition of the Continental Crust | 2003 | Treatise on Geochemistry | 6.2K | ✕ |
| 10 | The composition of the continental crust | 1995 | Geochimica et Cosmochi... | 6.1K | ✕ |
In the News
Geoscientific breakthrough could spark new gold rush in WA
found. This discovery builds on years of detailed geochemical analysis funded through the State's highly successful Exploration Incentive Scheme. By analysing thousands of geological samples, GSWA ...
Geochemical-process extraction and interpretation using matrix factorization: a framework for verifying effectiveness through forward modeling and inversion analysis
# Geochemical-process extraction and interpretation using matrix factorization: a framework for verifying effectiveness through forward modeling and inversion analysis
Comparison of manifold learning algorithms for identifying geochemical anomalies associated with copper mineralization
stream sediment geochemical data in the Baiyin district for mineralization-related geochemical anomaly detection. A total of 12 elements (Ag, Ba, Cd, Co, Cu, Hg, Mn, Mo, Ni, Pb, Sb, and Zn) were se...
ARPA-E offers funding for magnetic materials and rare-mineral recovery
* Funding is available from ARPA-E for magnet materials and rare earth element analysis. * The application process starts now, and final selections come in January.
Giant Mining Plans Up to 10000-Foot Multi-Phase Drill ...
Giant has assembled a comprehensive exploration database from all drilling, geologic mapping, soil and rock geochemistry, and geophysics. The recent Breccia Study reviewed the 3D geology and minera...
Code & Tools
_Pygeochemtools_ is a python library and command line interface tool to enable rapid manipulation, filtering, QC and plotting of geochemical data. ...
MagmaPandas is a Pandas based tool set for geochemical calculations and modelling. It makes working with geochemical data easier by extending the P...
The python package includes functions to work with compositional data, to transform geochemical variables (e.g. elements to oxides), functions for ...
PySILLS is a newly developed, Python-based open source tool for a modern data reduction of LA-ICP-MS experiments. It is focused on the compositiona...
The goal of GQAnalyzer is to be a tool to support the analysis of the chemical composition of different types of geological fluids (groundwater, ge...
Recent Preprints
Journal of Geochemical Exploration
20 days Time to first decision 195 days Submission to acceptance View all insights Dr. Martiya Sadeghi, PhD Geological Survey of Sweden, Uppsala, Sweden Articles More from Journal of Geochemical Ex...
Geological Journal - Wiley Online Library
_Geological Journal_ is an interdisciplinary geosciences journal publishing research across all branches of geology and the geological sciences, including sedimentology and geomorphology, palaeonto...
Organic geochemical evidence for life in Archean rocks ...
Teasing out biochemical information from ancient organic-rich sediments, notably the timing of the emergence of photosynthesis relative to the inferred oxygenation of Earth’s atmosphere, remains a ...
Potential of Remote Sensing for the Analysis ...
This study primarily relies on geological and remote sensing methods, with statistical techniques applied to enhance rigor. Uncertainty quantification methods were used to validate spectral data, i...
Journal of the Geological Society Home
Skip to main content Home HOME Journals Earth Science, Systems and Society Geochemistry: Exploration, Environment, Analysis Geoenergy Journal of the Geological Society Petroleum Geoscience Proceedi...
Latest Developments
Recent developments in geological and geochemical analysis research include upcoming international conferences such as ICEGS-2026 in Vienna and the 7th World Congress on Geology & Earth Science in Paris, focusing on advancements in earth sciences and geochemistry (Result 1, Result 4). Additionally, the IAGS 2026 symposium emphasizes data science's role in geochemistry, highlighting machine learning and advanced analytical tools (Result 2). Research articles explore geochemical process extraction via matrix factorization, compositional data analysis workflows, and organic geochemical evidence for early life, indicating a focus on data-driven and innovative analytical methods (Result 9, Result 10, Result 7).
Sources
Frequently Asked Questions
What chemical systematics apply to oceanic basalts?
Trace-element data for mid-ocean ridge basalts (MORBs) and ocean island basalts (OIB) indicate incompatibility orders such as Cs ≈ Rb ≈ (Tl) ≈ Ba(≈ W) > Th > U ≈ Nb = Ta ≈ K. Shen‐Su Sun and W. F. McDonough (1989) formulated these systematics for mantle composition and processes. The paper has 24,744 citations in Geological Society London Special Publications.
How are granitic rocks classified tectonically?
Granites are subdivided into ocean ridge granites (ORG), volcanic arc granites (VAG), within plate granites (WPG), and collision granites (COLG) using trace element discrimination diagrams. Julian A. Pearce, Nigel Harris, and A. G. Tindle (1984) detailed these groups in Journal of Petrology with 8,341 citations. Further subdivisions occur based on precise intrusive settings.
What is the TAS diagram used for?
The total alkali-silica (TAS) diagram classifies volcanic rocks on a non-genetic basis when modal analyses are lacking. M. J. Le Bas et al. (1986) summarized IUGS recommendations for this system in Journal of Petrology, cited 6,474 times. It distinguishes subalkaline and alkaline rocks.
How are volcanic rocks chemically classified?
Volcanic rocks are classified as subalkaline (tholeiitic basalt series or calc-alkali series) or alkaline using chemical systems. Τ. N. Irvine and W R A Baragar (1971) presented this in Canadian Journal of Earth Sciences with 7,237 citations. Examples include tholeiitic picrite-basalt, high-alumina basalt, alkali olivine basalt, and basanite.
What empirical relationships exist for earthquake ruptures?
Relationships link moment magnitude (M) to surface rupture length, subsurface rupture length, downdip rupture width, rupture area, and displacements. Donald Wells and Kevin J. Coppersmith (1994) compiled worldwide historical earthquake data for these in Bulletin of the Seismological Society of America, cited 7,548 times. Parameters include maximum and average displacement per event.
What defines continental crust composition?
Continental crust composition is detailed through geochemical models. Roberta L. Rudnick and Shan Gao (2003) addressed this in Treatise on Geochemistry with 6,219 citations, while K. H. Wedepohl (1995) covered it in Geochimica et Cosmochimica Acta with 6,130 citations. These works estimate bulk properties from various analyses.
Open Research Questions
- ? How do trace element incompatibilities in MORBs and OIB precisely reflect mantle heterogeneity beyond established orders?
- ? What refinements are needed in granite discrimination diagrams to account for hybrid tectonic settings?
- ? How can IntCal20 radiocarbon calibration be extended for deeper geochronological analysis in orogenic belts?
- ? What matrix factorization techniques best extract geochemical processes from multi-element datasets in mineralization studies?
- ? How do Archean organic geochemistry signals inform the timing of photosynthesis relative to atmospheric oxygenation?
Recent Trends
Manifold learning algorithms identify geochemical anomalies for copper mineralization in Baiyin district stream sediments using 12 elements (Ag, Ba, Cd, Co, Cu, Hg, Mn, Mo, Ni, Pb, Sb, Zn).
Organic geochemical evidence from 406 ancient and modern samples uses supervised machine learning to discriminate Archean life signals.
Geoscientific breakthrough in Western Australia via Exploration Incentive Scheme analyzed thousands of samples for gold rush chemical signatures.
Tools like pygeochemtools, MagmaPandas, pyrolite, PySILLS, and GQAnalyzer support data manipulation, QC, plotting, and LA-ICP-MS reduction.
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