2016 Fiscal Year Final Research Report
Mineral inclusions study on early Earth: magnetism, tectonics and magma genesis
| Project/Area Number |
26302004
|
|---|
| Research Category |
Grant-in-Aid for Scientific Research (B)
|
| Allocation Type | Partial Multi-year Fund |
|---|
| Section | 海外学術 |
|---|
| Research Field |
Solid earth and planetary physics
|
|---|
| Research Institution | Japan Agency for Marine-Earth Science and Technology |
|---|
Principal Investigator |
USUI Yoichi 国立研究開発法人海洋研究開発機構, 地球深部ダイナミクス研究分野, 研究員 (20609862)
|
|---|
| Co-Investigator(Kenkyū-buntansha) |
谷 健一郎 独立行政法人国立科学博物館, 地学研究部, 研究員 (70359206)
|
|---|
| Co-Investigator(Renkei-kenkyūsha) |
SHIBUYA Takazo 国立研究開発法人海洋研究開発機構, 深海・地殻内生物圏研究分野, 研究員 (00512906)
|
|---|
| Research Collaborator |
SAITOH Masafumi
NISHIZAWA Manabu
KASHIWABARA Teruhiko
OKUMURA Tomoyo
SATO Honami
KATO Chie
|
|---|
| Project Period (FY) |
2014-04-01 – 2017-03-31
|
| Keywords | 古地磁気 / 離溶磁鉄鉱 / 太古代 / ピルバラクラトン / ジルコン |
|---|
| Outline of Final Research Achievements |
We conducted field study around the town Marble Bar in the Pilbara craton, Western Australia. We discovered the near-single domain exsolved magnetite in plagioclase in ca. 3.3 Ga granitoid. We quantify the magnetic anisotropy and remanence acquisition efficiency of the exsolved magnetite. We also measure ca. 3.5 Ga red dacite near Glen Herring Gorge. In contrast to the previous results, we argue that the potentially primary remanence should be restricted to the blocking temperature above 400 C.
|
| Free Research Field |
古地磁気学
|
