Overview
An extensive Triassic review that delivers a major biostratigraphic upgrade for the Bonaparte Basin, reinterpreting over 600 samples across 26 wells with a consistent, high-resolution palynological framework.
Crucial New Insights
New insights into the regional stratigraphy of the Vulcan Sub Basin and adjacent areas of the Ashmore Platform and Londonderry High.
Subdivision of Carnain Sequences
The thick Carnian sequences present in the Vulcan Sub Basin were confidently subdivided by palynology for the first time.
Timing of Formation Boundaries
A better understanding of the timing of the Nome/Challis and Challis/Pollard formation boundaries.
Revised Sequence Strat Framework
Higher confidence well correlations leading to the construction of more robust sequence stratigraphic frameworks.
Background
As renewed interest in Triassic plays in the Bonaparte Basin continues to gather pace, the completion of a major biostratigraphic review by MGPalaeo aims to provide key stratigraphic support for your exploration needs.
The pre-existing Triassic palynology for much of the basin is a mix of old studies, broad zonal assignments, multiple zonation schemes and non-quantitative assemblage data. The newly revised palynological data provides a single, consistent set of zonal and subzonal assignments, thus allowing higher confidence well correlations and the construction of more robust sequence stratigraphic frameworks.
MGPalaeo has been able to apply its experience from other North West Shelf and Timor-Leste Triassic plays, including much of the higher resolution Carnian–Rhaetian biostratigraphy developed in the Northern Carnarvon Basin, to this study.
| Phase 1 | Phase 2 | Data Review |
|---|---|---|
| Brown Gannet 1 | Dillon Shoals 1 | Ashmore Reef 1 |
| Cassina 2 | Halcyon 1 | Mt Ashmore 1 |
| Crane 1 | Maple 2 | North Hibernia 1 |
| Great Auk 1 | Rainbow 1 | |
| Osprey 1 | Rainier 1 | |
| Pengana 1 | Sebring 1 | |
| Pokolbin 1 | Snowmass 1 | |
| Pollard 1 | Talbot 1 | |
| Sahul Shoals 1 | Troubadour 1 | |
| Saucepan 1 | Turnstone 1 | |
| Warb 1A | Woodbine 1 | |
| Yarra 1 |
Table 1: Wells selected for each phase of this study.
Deliverables
The review has yielded crucial new insights into the regional stratigraphy, with significant revisions to the palynological zonal and subzonal assignments, and consequently to the lithostratigraphic and sequence stratigraphic interpretations.
Tabulated Data
Tabulated biostratigraphic data, fully revised and updated.
Interpretative Stratabugs Charts
Interpretative Stratabugs Charts for each well, including full quantitative assemblage counts.
Revised litho- and sequence picks
Available as an add-on via our Australis geological database.
Well Correlation Panels
Available as an add-on via our Australis geological database.