2011 Fiscal Year Final Research Report
Relationship between photosynthesis and banded iron formations at the early Archean
| Project/Area Number |
21403009
|
|---|
| Research Category |
Grant-in-Aid for Scientific Research (B)
|
| Allocation Type | Single-year Grants |
|---|
| Section | 海外学術 |
|---|
| Research Field |
Petrology/Mineralogy/Science of ore deposit
|
|---|
| Research Institution | Tohoku University |
|---|
Principal Investigator |
|
|---|
| Co-Investigator(Kenkyū-buntansha) |
HASHIZUME Ko 大阪大学, 大学院・理学研究科, 助教 (90252577)
OBA Masahiro 東北大学, 大学院・理学研究科, 助教 (40436077)
|
|---|
| Project Period (FY) |
2009 – 2011
|
| Keywords | 生体 / 環境鉱物 / 光合成 / 太古代 / 酸素 |
|---|
| Research Abstract |
Diagenetic chromium oxides were newly found in banded iron formations at 3. 2 Ga Barberton Greenstone Belt, South Africa. Oxygenisotopeanalyses of chromium oxides suggest oxygen from photosynthesis was responsible for oxidation and precipitation of chromium. By studying banded iron formations at Lumby Lake area, Canada, many geological samples recoded the evidence of oxygenic photosynthesis and activities of chemoautotrophs. In particular,"chemoautotrophic" rocks were found to be formed under t he influence of submarine hydrothermal activities. In other words, photosynthesis was widespread at the surface oceans and bottom was dominated by chemoautotrophs at 3. 0 Ga.
|
Research Products
(47 results)
-
-
-
-
-
-
-
-
[Journal Article] Spatial distribution, diversity and composition of bacterial communities in sub-seafloor fluids at a deep-sea hydrothermal field of the Suiyo Seamount2009
Author(s)
Kato S., Hara K., Kasai H., Teramura T. Sunamura M., Ishibashi J-I., Kakegawa T., Yamanaka T., Kimura H., Marumo K., Urabe T., Yamagishi A
-
Journal Title
Deep Sea Research Part 1
Volume: vol.56
Pages: 1844-1855
Peer Reviewed
-
-
-
-
-
-
-
-
-
-
-
-
-
[Presentation] ペルム紀末の大量絶滅とその回復期の遠洋環境の復元2011
Author(s)
高橋聡, 海保邦夫, 山北聡, 大庭雅寛, 掛川武, 渡邊隆広, 山崎慎一, 小川泰正, 木村和彦, 土屋範芳, 吉田武義, 坂田将, 鈴木紀毅, 永広昌之
Organizer
地球化学会
Place of Presentation
札幌
Year and Date
2011-09-14
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
