パーセヴァランス ローバー は,古代 の デルタ 湖 システム と 火星 の ジェゼロ クレーター の 浸水 堆積物 を 発見 し た
N Mangold1, S Gupta2, O Gasnault3
1Laboratoire Planétologie et Géodynamique, Centre National de Recherches Scientifiques, Université Nantes, Université Angers, Unité Mixte de Recherche 6112, 44322 Nantes, France.
Science (New York, N.Y.)
|October 7, 2021
まとめ
パーセヴァランスローバーは火星のジェゼロクレーターで堆積岩を発見し,持続的な湖環境から高エネルギー洪水への移行を示しました. これはクレーターの水学的な進化を明らかにしています
科学分野:
- 惑星科学
- 地質学
- 水学
背景:
- 火星のジェゼロクレーターには 扇形状の堆積物がある.
- 軌道上の観測は,その存在を明らかにしたが,詳細な分析は限られた.
研究 の 目的:
- ジェゼロクレーターの水文学的進化を理解するために パーセヴァランスローバーの画像を分析します
- 岩盤の堆積物を調査する
主な方法:
- ローバーが着陸後最初の3ヶ月で撮影した画像の分析
- 傾斜層や岩の集積を含む堆積構造の解釈
主要な成果:
- 浮き彫りの顔は 扇風機の埋蔵の 未知の詳細を明らかにしました
- 傾斜した層は 湖に沈殿したことを示唆しています
- 岩石の集積からなる最上層層は,高エネルギーの洪水堆積を示しています.
結論:
- ジェゼロクレーターの堆積物順序は,持続的な湖環境から,高エネルギー流のエピソード的な流れへと移行していることを示しています.
- これは火星のダイナミックな水文史の洞察を与えてくれます
関連する概念動画
01:03Precipitation Gravimetry
8.2K
Precipitation gravimetry is based on converting an analyte into a sparingly soluble precipitate, which is separated by filtration and weighed. An ideal precipitate should be pure, insoluble, of known composition, and easily filtered from the reaction mixture.
In determining nickel by gravimetric analysis, a precipitant of ethanolic dimethylglyoxime is added to a hot nickel salt solution. This is quickly followed by the dropwise addition of dilute ammonia solution until precipitation occurs. A...
In determining nickel by gravimetric analysis, a precipitant of ethanolic dimethylglyoxime is added to a hot nickel salt solution. This is quickly followed by the dropwise addition of dilute ammonia solution until precipitation occurs. A...
8.2K
02:34Water and Mineral Acquisition
34.0K
Specialized tissues in plant roots have evolved to capture water, minerals, and some ions from the soil. Roots exhibit a variety of branching patterns that facilitate this process. The outermost root cells have specialized structures called root hairs that increase the root surface, thus increasing soil contact. Water can passively cross into roots, as the concentration of water in the soil is higher than that of the root tissue. Minerals, in contrast, are actively transported into root cells.
34.0K
00:49Gravimetry: Inorganic And Organic Precipitating Agents
1.9K
In gravimetry, the precipitant is chosen carefully to obtain a pure solid that can be easily filtered. Common inorganic precipitants can be used to determine several cations and anions. In some cases, the formation of the same precipitate can be used to determine the cation and the anion. For example, the reaction of barium and chromate ions to give barium chromate is used to determine both barium and chromate. However, precipitates such as hydroxides, oxalates, and metal ammonium phosphates...
1.9K
02:41Responses to Drought and Flooding
11.2K
Water plays a significant role in the life cycle of plants. However, insufficient or excess of water can be detrimental and pose a serious threat to plants.
11.2K
01:18Porosity in Cement Paste
261
The porosity of concrete is a measure of the void spaces within its structure. These spaces impact its strength and durability significantly. When water and cement interact, a chemical reaction called hydration creates a semi-solid paste. This paste includes combined water, making up approximately 23% of the cement's dry mass, and gel water, which fills minuscule voids known as gel pores, accounting for about 28% of the cement gel volume.
The balance of water to cement in the mix is...
The balance of water to cement in the mix is...
261
04:49Robbers Cave
14.5K
During the 1950s, the landmark Robbers Cave experiment demonstrated that when groups must compete with one another, intergroup conflict, hostility, and even violence may result. At the Oklahoman summer camp, two troops of boys—termed the Rattlers and the Eagles—took part in a week-long tournament. During this time, their negativity culminated in derogatory name-calling, fistfights, and even vandalism and destruction of property. However, this work also revealed that such tension...
14.5K