Ruqayyah Snyder
A 4-billion-year-old piece of Earth's crust has been discovered beneath Western Australia, marking a significant development in understanding the evolution of the planet and the potential for life. The ancient crust, covering an area of at least 38,610 square miles, was identified through the use of lasers targeting microscopic grains of minerals extracted from beach sand. This discovery sheds light on the early formation of the Earth's crust and its stabilization, providing insights into the geological history of the region and the formation of rocks and minerals. The findings contribute to the growing body of research on the Earth's ancient past and have implications for sustainable resource exploration.
| Characteristics | Values |
|---|---|
| Age | 4 billion years old |
| Size | Similar to Ireland |
| Location | South-West of Western Australia |
| Depth | Tens of kilometers below the surface |
| Area Covered | 38,610 square miles (100,000 square kilometers) |
| Associated With | Gold and iron ore deposits |
| Importance | Provides insights into the formation of the planet and the evolution of life |
| Discovery Method | Lasers smaller than human hair |
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What You'll Learn
The crust is around 4 billion years old
A piece of Earth's crust around 4 billion years old has been discovered beneath Western Australia. This discovery was made by researchers from Curtin University, who used lasers smaller than human hair to target microscopic grains of zircon extracted from beach sand. The lasers revealed the geological history of the region and where the grains were originally eroded from.
The ancient crust covers an area of at least 38,610 square miles (100,000 square kilometers) and is buried "tens of kilometers" below the surface. It is associated with gold and iron ore deposits, indicating its role in controlling the formation of rocks and minerals in the region. This discovery provides valuable insights into the evolution of the planet and the development of life on Earth.
The study's lead author, Maximilian Droellner, a doctoral student at Curtin University, suggested that this ancient crust influenced the geological evolution of Western Australia for billions of years. The crust is among the oldest on Earth, though the oldest known crust is dated to 4.3 billion years old and is found in the rocks of the Canadian Shield on the eastern shore of Hudson Bay.
The discovery of this ancient crust contributes to our understanding of how the planet transformed from an uninhabitable world to one capable of supporting life. It also highlights the importance of recognizing ancient crustal remnants for optimized and sustainable resource exploration. This find is significant as it helps researchers understand how the continents first formed and the processes that shaped the planet into what it is today.
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It was discovered using lasers
A piece of Earth's crust that is approximately four billion years old has been discovered beneath the South-West of Western Australia. The piece of crust, which is among the oldest on Earth, was found by researchers from Curtin University's School of Earth and Planetary Sciences.
The discovery was made using lasers smaller than a human hair to target microscopic grains of the mineral zircon extracted from beach sand. By vaporizing portions of individual grains, the researchers were able to determine the geological history of the region and where the grains were originally eroded from.
The findings revealed that the ancient crust covers an area of at least 38,610 square miles (100,000 square kilometers) and is buried "tens of kilometers" below the surface. The boundary of the crust is associated with gold and iron ore deposits, indicating the importance of this ancient crust in controlling the formation of rocks and minerals in the region.
According to Ph.D. student Maximilian Droellner, the discovery provides evidence that the ancient crust has been influencing the geological evolution of Western Australia for billions of years and is a key ingredient in the rocks formed in the region. The study was published in the journal Terra Nova and contributes to our understanding of how the planet transitioned from being uninhabitable to supporting life.
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It is buried tens of kilometres below the surface
A piece of Earth's crust estimated to be around 4 billion years old has been discovered beneath Western Australia. This discovery was made by researchers from Curtin University, who used lasers smaller than human hair to target microscopic grains of zircon extracted from beach sand in the region. The lasers were used to vaporize portions of the mineral, revealing its geological history and where it was originally eroded from.
The ancient crust is buried "tens of kilometres" below the surface, and covers an area of at least 38,610 square miles (100,000 square kilometres). It is believed to be among the oldest on Earth, though not the oldest, with rocks in Canada dated to 4.3 billion years old. The discovery of this crust provides valuable insights into the early formation of the planet and the evolution of life on Earth.
The edge of the ancient crust defines a crucial crustal boundary, influencing the formation of rocks and minerals in the region. This boundary controls the location of economically important minerals, making the recognition of these ancient crustal remnants significant for sustainable resource exploration. The study of this early crustal formation contributes to our understanding of how the planet transitioned from an uninhabitable state to one capable of supporting life.
The findings also highlight the importance of this ancient crust in the geological evolution of Western Australia, as it has influenced the formation of rocks in the region for billions of years. This discovery adds to our knowledge of the Earth's crustal growth and the processes that shaped our planet's surface over time.
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The crust covers an area of at least 38,610 square miles
A piece of Earth's crust estimated to be around 4 billion years old has been discovered beneath Western Australia. The crust covers an area of at least 38,610 square miles (100,000 square kilometres) and is buried tens of kilometres deep. This discovery was made by researchers from Curtin University, who used lasers smaller than human hair to target microscopic grains of zircon extracted from beach sand in the region. The lasers were used to vaporise portions of the mineral, revealing its original erosion and the geological history of the area.
The findings indicate that this ancient crust has influenced the geological evolution of Western Australia for billions of years and is a key ingredient in the rocks formed in the region. According to the researchers, the crust's boundary is associated with gold and iron ore deposits, highlighting its significance in controlling the formation of valuable minerals.
The discovery of this ancient crust provides valuable insights into the early evolution of the Earth. It suggests that around four billion years ago, there was a significant change in the planet's development. This period was marked by a decrease in meteorite bombardment, stabilisation of the crust, and the emergence of life on Earth.
Recognising and studying these ancient crustal remnants are crucial for understanding the formation of the planet and the development of life. By comparing findings from different regions, scientists can piece together the puzzle of Earth's early history and gain a deeper understanding of the processes that shaped our planet into what it is today.
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It is a key ingredient of rocks formed in Western Australia
A team of researchers from Curtin University has discovered a 4-billion-year-old piece of the Earth's crust beneath Western Australia. This discovery was made using lasers smaller than human hair to target microscopic grains of zircon extracted from beach sand in the region. The use of lasers helped reveal the geological history of the region and the original erosion sites of the grains.
The ancient crust covers an area of at least 38,610 square miles (100,000 square kilometers) and is buried tens of kilometers below the surface. Its boundary is associated with gold and iron ore deposits, indicating the role of this crust in the formation of rocks and minerals in Western Australia.
The discovery of this ancient crust is significant for understanding the evolution of the Earth. It provides insights into the early formation and preservation of the Earth's crust, which occurred around 4 billion years ago when meteorite bombardment reduced, the crust stabilized, and life on Earth began to emerge.
Furthermore, the ancient crust is considered a key ingredient in the rocks formed in Western Australia. According to Ph.D. student Maximilian Droellner, who led the research, "There is evidence that an up to four billion-year-old piece of crust about the size of Ireland has been influencing the geological evolution of WA for the past few billions of years and is a key ingredient of rocks formed in WA across this time."
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Frequently asked questions
The piece of crust is approximately 4 billion years old.
The piece of crust covers an area of at least 38,610 square miles (100,000 square kilometers) and is buried tens of kilometers below the surface. It is said to be about the size of Ireland.
Researchers from Curtin University used lasers smaller than human hair to target microscopic grains of a mineral extracted from beach sand.
Recognizing these ancient crustal remnants is important for understanding the evolution of the Earth and the formation of continents. It also helps in understanding the distribution of economically important minerals.
