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Ishikawa Lab
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A lab that precisely reads the history of the solid Earth from rocks of the deep mantle.
AboutAbout the lab
Precisely deciphering the evolutionary history of the solid Earth
The Ishikawa Lab studies how the solid Earth has evolved from its birth to the present.
Its clues are natural rocks and minerals collected through fieldwork and research cruises.
In particular, the lab reads the information recorded in rocks and minerals that came from the mantle, deep within the Earth.
Key terms
- Mantle
- The thick layer of rock beneath the crust at the Earth's surface and outside the core at the center
- Tectonics
- The mechanisms that move and shape the land, such as the motion of the plates that cover the Earth's surface
- Archean
- A geological era in the very distant past, corresponding to the first half of Earth's history. Toward its end, oxygen began to accumulate at the Earth's surface
- Phanerozoic
- The period from when fossils of visible-sized organisms began to be found in large numbers up to the present
ResearchResearch themes
The lab reads the evolution of the solid Earth, from its birth to the present, from information preserved in natural geological samples, especially rocks and minerals derived from the deep mantle. Its research relies on fieldwork around the world and geochemical analysis of rocks.
*Illustrative imageThe Newborn Earth
By studying Archean geological bodies distributed around the world in the field and analyzing the rocks chemically, the lab reconstructs the tectonics that governed the Earth right after its birth.
*Illustrative imageThe Present-Day Mantle
By examining magmas derived from the deep mantle and mantle peridotites, the lab clarifies the mechanisms of material circulation and motion occurring inside the Earth.
*Illustrative imagePhanerozoic Mass Extinctions
Focusing on the boundaries of geological periods defined by mass extinctions and the subsequent evolution of life, the lab deciphers the meteorite impacts and large-scale eruptions that caused the extinctions, and the environmental changes they triggered.
*Illustrative imageThe Greatest Turning Point in Earth's History
The lab explores how oxygen began to accumulate at the Earth's surface and the changes in the solid Earth that triggered it, aiming to build a standard model of Earth history from the end of the Archean to the beginning of the Proterozoic.
MembersFaculty
The members of the Ishikawa Lab consist of faculty members and PhD, master's, and undergraduate students.
- Associate ProfessorAkira IshikawaPublications ↗
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Report an errorAbout the images
The top and research theme images are illustrative and were not taken at the lab. They are cropped from Wikimedia Commons images. Cropped CC BY-SA images are provided under the same CC BY-SA license as the original (version shown on each line).
- Top image: “Lherzolite mantle xenolith in basalt (Afton Basalt Flow Upper Pleistocene, 15-20 ka; Kilbourne Hole Crater, Aden-Afton Basalt Field, Potrillo Volcanic Field, southwestern New Mexico, USA) ( )” James St. John / CC BY 2.0 (cropped)
- The Newborn Earth: “Acasta Gneiss from Canada” James St. John / CC BY 2.0 (cropped)
- The Present-Day Mantle: “Spinel lherzolite - Neoproterozoic-aged xenolith in Pleistocene basalt (Mt. Leura Complex, Newer Volcanics Province; Mt. Leura, southwestern Victoria, southeastern Australia) ( )” James St. John / CC BY 2.0 (cropped)
- Phanerozoic Mass Extinctions: “K–Pg boundary in Colorado” Jeffrey Beall / CC BY 4.0 (cropped)
- The Greatest Turning Point in Earth's History: “Tiger Iron2” James St. John / CC BY 2.0 (cropped)
- Related lab (尾﨑研究室): “Blue Marble Western Hemisphere” NASA / Reto Stöckli / Public domain (cropped)
- Related lab (上野雄一郎研究室): “Stromatolites at Hamelin Pool in Shark Bay - Western Australia - 27 Aug. 2014” Bryn Pinzgauer / CC BY 2.0 (cropped)
- Related lab (中島研究室): “A seismogram of 2011 Tōhoku earthquake and tsunami” Z22 / CC BY-SA 3.0 (cropped)
- Related lab (癸生川研究室): “Carbonaceous chondrite (Murchison Meteorite) ( )” James St. John / CC BY 2.0 (cropped)
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