Rock Samples from Macquarie Island for Hydrothermal Alteration Study

AU_AADC provides a dataset summarizing rock samples collected by Steve Lewis to investigate hydrothermal alteration in oceanic crust on Macquarie Island. The samples, up to 1 kg each, were obtained by hand with a geological hammer from areas including Lusitania Bay and Caroline Cove. The dataset was last updated on March 31, 2003.

Use Cases

• Analyze the composition and geometry of slow-spreading crust based on rock sample data.
• Study hydrothermal fluid cycling and sulfur exchange between ocean and crust based on sample details.
• Investigate the structural evolution of fault zones along Macquarie Island based on transect and location data.
• Compare geological features of slow-spreading crust to more common fast-spreading crust based on the described research questions.

Strengths

• Samples provide a rare land-based cross-section of deep ocean floor, which covers 60% of Earth.
• Focuses on slow-spreading crust formed 11 million years ago, an area with minimal study compared to fast-spreading crust.
• Samples were collected from specific, named locations: Lusitania Bay, Caroline Cove, and the major lake area.

Limitations

• Description metadata is limited; actual data quality requires manual inspection after download.
• Last updated 2003-03-31 23:59:59.999000; freshness should be verified.
• Column-level documentation is absent; field semantics must be inferred after download.

Provenance

Source

AU_AADC

Collection Method

Samples were all obtained by hand with a geological hammer.

Time Range

Samples relate to crust formed 11 million years ago.

Freshness

2003-03-31 23:59:59.999000

Geography

Macquarie Island, specifically Lusitania Bay, Caroline Cove, and the major lake area.