Mark Hannington: A new 1:1 million geological map of the Indo-Australian margin

Value of the Information & Strength of the Argument

The talk provides valuable insights into the geological evolution of the Indo-Australian margin and its metallogenic significance. Hannington presents a compelling argument for the microplate model, supported by observations from modern back-arc basins and comparisons to Archean terrains. He effectively uses the new map to illustrate the complexity of the region and its implications for mineral exploration. The argumentation is solid, but some claims are presented without detailed evidence, relying on the authority of the speaker and ongoing research.

The title accurately reflects the content, which focuses on the creation and implications of a new geological map of the Indo-Australian margin.

8/10

Presentation by a leading expert in economic geology, based on extensive research and peer-reviewed publications, but limited by the format of a conference talk with no detailed methodology or data verification.

Markers derived by PSI from the transcript: the creator did not define chapters.

• 00:30Introduction of the new map and its significance.
• 02:00Explanation of the microplate model and its implications for heat loss and mineral deposits.
• 05:00Comparison of modern microplate mosaics to Archean greenstone belts.
• 08:00Discussion of the complexity of the Indo-Australian margin, including transform faults and slab tears.
• 10:00Presentation of the map's features, including the Ontong Java Plateau collision and its effects.
• 12:00Comparison of the Lau Basin and North Fiji Basin in terms of attributes and endowment.
• 14:00Discussion of the metallogeny of the region, including the Lihir gold deposit and VMS deposits.
• 16:00Explanation of the slab windows beneath Lihir and their relation to mineralization.
• 18:00Invitation to examine the map and future plans for extending it.

• Microplate model paper in Economic Geology — Described as open access, published in November issue, presenting the microplate model.
• Paper in Scientific Reports on hydrothermal vents near Lihir — Mentioned as a recent publication on the discovery of hydrothermal vents near the Lihir gold deposit.

• Microplate model paper in Economic Geology — The talk is based on this paper, which supports the microplate model.
• Paper in Scientific Reports on hydrothermal vents — Recent discovery of hydrothermal vents near Lihir, consistent with the talk's emphasis on active mineralization.