Recent Tectonic Activity in and Around the Posidonius Crater, Moon
Bibliographic record
Abstract
Abstract Tectonic structures such as wrinkle ridges, lobate scarps, small‐scale graben, and tectonic pits reveal the recent lunar activity and complex deformational processes. Despite numerous studies, the northeastern region of the Mare Serenitatis basin, including the Posidonius crater, has yet to be studied in detail. This research presents a comprehensive analysis of tectonic structures in this region, revealing ∼808 km of wrinkle ridges, ∼286 km of lobate scarps, ∼346 km of small‐scale graben, and ∼269 tectonic pits. We identified 412 craters deformed by wrinkle ridges, 55 craters by lobate scarps, and 108 craters by small‐scale graben, suggesting extensive recent deformation. Chronological analysis of wrinkle ridges and lobate scarps revealed young ages ranging from Ma to ∼120 ± 30 Ma close to the crater, whereas Posidonius crater resurfaced floor age tend to Ga. Our study suggests that the blind thrust fault deformed the western floor of the Posidonius crater, with small‐scale graben with pits plausibly developed during the reactivation. Orthogonal transitions that occur between adjacent wrinkle ridges and lobate scarps in the study area could be a splay fault of the blind thrust fault and likely formed during the reactivation. This reactivation plausibly resulted from a combination of recession stresses, diurnal tidal stresses, and global contraction. Additionally, a combination of complex processes─intrusion, subsidence, and tectonics associated with the blind thrust fault plausibly influenced Rima Posidonius. Overall, this study suggests that the northeastern region of the Mare Serenitatis basin witnessed recent tectonic activity and could be a potential site for future exploration missions.
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How this classification was reachedexpand
Full frame distilled prediction
Teacher imitationNot calibrated prevalence, not ground truth. Human validation pending. Learned from the 10,348 direct Codex labels and 10,348 direct Gemma labels. Candidate is the union of thresholded teacher heads; consensus is their intersection. These outputs are machine_predicted_unvalidated and are not human labels or direct frontier model labels.
Codex and Gemma teacher scores by category
| Category | Codex | Gemma |
|---|---|---|
| Metaresearch | 0.001 | 0.000 |
| Meta-epidemiology (narrow) | 0.000 | 0.000 |
| Meta-epidemiology (broad) | 0.000 | 0.000 |
| Bibliometrics | 0.000 | 0.000 |
| Science and technology studies | 0.000 | 0.000 |
| Scholarly communication | 0.000 | 0.000 |
| Open science | 0.000 | 0.000 |
| Research integrity | 0.000 | 0.001 |
| Insufficient payload (model declined to judge) | 0.000 | 0.000 |
Machine scores (provisional)
The two teacher heads of the student model, read on this work. A score orders the frame for review; it never asserts a category, and the validation status ships verbatim with every row.
Baseline scores from an immature model (maturity gate not passed, 7 training rounds). Scores rank; they never assert a category.
score_only:v0-immature-baseline · verbatim from the scoring run: score_only means the number may rank works, and no category label ships from itClassification
machine, unvalidatedMachine predicted; a candidate call from one teacher head, not a consensus.
How this classification was reached, model by model and score by score, is at the end of the page under "How this classification was reached".