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Constraints on ancient ocean chemistry based on the geochemical study of 3.8 Ga Isua Supracrustal Rocks.

基于3.8 Ga Isua表壳岩石地球化学研究对古代海洋化学的制约

基本信息

批准号：
14403012
负责人：
KAKEGAWA Takeshi
金额：
$ 8.45万
依托单位：
Tohoku University
依托单位国家：
日本
项目类别：
Grant-in-Aid for Scientific Research (B)
财政年份：
2002
资助国家：
日本
起止时间：
2002 至 2004
项目状态：
已结题

项目摘要

This scientific proposal has been approved in 2003. The main purpose is to conduct geological survey for the Isua area in Greenland. In this area, the oldest fragments of the, earth crust is found : they were formed at 3.8 Ga on the contemporary ocean floor. The main scientific goal is to constrain the ocean chemistry at 3.8 Ga through the geochemical studies of the Isua rocks. In addition, finding new evidence for the early life is also the subject. From 2003 to 2004, detailed field surveys were performed. Collected rocks were analyzed by several geochemical methods. New results to constrain the phosphorous and carbonate chemistry were obtained. New evidence for the earliest life was also discovered through the course of this study. These were very fruitful results and very important findings. Some results were already published on the scientific journals.Studying modern analogue is additional subjects for this study. Submarine and terrestrial hot springs were chosen for this purpose. Some data obtained from the field was used for experiments to demonstrate the early earth environments in the laboratory.

这项科学提案已于2003年获得批准。主要目的是对格陵兰的伊苏阿地区进行地质调查。在这一地区，发现了最古老的地壳碎片：它们形成于3.8Ga的当代洋底。主要的科学目标是通过对伊苏阿岩石的地球化学研究，将海洋化学限制在3.8Ga。此外，寻找早期生命的新证据也是主题。从2003年到2004年，进行了详细的实地调查。采集的岩石用几种地球化学方法进行了分析。获得了约束磷和碳酸盐化学的新结果。在这项研究过程中，也发现了最早生命的新证据。这些都是非常丰硕的成果和非常重要的发现。一些结果已经发表在科学期刊上。研究现代类比是这项研究的补充主题。为此，选择了海底和陆地温泉。从野外获得的一些数据被用于实验，以证明实验室中的早期地球环境。

项目成果

期刊论文数量（98）

专著数量（0）

科研奖励数量（0）

会议论文数量（0）

专利数量（0）

Geological study of carbonation of the 3.8 Ga Isua supracruatal belt and abiological graphite generation.

3.8 Ga Isua 上带碳化及非生物石墨生成地质研究.

DOI：
发表时间：
2004
期刊：
Water Dynamics Proceeding 2
影响因子：
0
作者：
Kenji TASAKI a Kenji KOSA;Yukio ADACHI;Eiki YAMAGUCHI;Ohtomo Y.
通讯作者：
Ohtomo Y.

Oceanithermus desulfurans sp nov., a novel thermophilic, sulfur-reducing bacterium isolated from a sulfide chimney in Suiyo Seeamount.

Oceanithermus desulfurans sp nov.，一种从 Suiyo Seemount 的硫化物烟囱中分离出来的新型嗜热、硫还原细菌。

DOI：
发表时间：
2004
期刊：
International journal of systcmatic and cvolutionary microbiology 54
影响因子：
0
作者：
Shiokawa K;Otsuka Y;Ogawa T;Kawamura S;Yamamoto M;Fukao S;Nakamura T;Tsuda T;et al.;Mori K.
通讯作者：
Mori K.

Heavy metal enrichment in Archean carbon-rich samples: Hint to early carbon-metal compounds for enzyme formation?

太古宙富碳样品中的重金属富集：提示早期碳金属化合物用于酶的形成？