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您的检索式：作者名="David R.Hilton"
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| 1 | Iron Speciation of Mud Breccia from the Dushanzi Mud Volcano in the Xinjiang Uygur Autonomous Region,NW China显示文摘Organic-inorganic interactions occurring in petroleum-related mud volcanoes can help predict the chemical processes that are responsible for methane emissions to the atmosphere. Seven samples of mud breccia directly ejected from one crater were collected in the Dushanzi mud volcano, along with one argillite sample of the original reddish host rocks distal from the crater, for comparison purposes. The mineral and chemical compositions as well as iron species of all samples were determined using XRD, XRF and M?ssbauer spectroscopy, respectively. The results indicate that a series of marked reactions occurred in the mud volcano systems, more specifically in the mud breccia when compared to the original rocks. Changes mainly included:(1) some conversion of clay minerals from smectite into chlorite and illite, and the precipitation of secondary carbonate minerals such as calcite and siderite;(2) silicon depletion and significant elemental enrichment of iron, manganese, magnesium, calcium and phosphorus; and(3) transformation of iron from ferric species in hematite and smectite into ferrous species in siderite, chlorite and illite. These geochemical reactions likely induced the color changes of the original reddish Neogene argillite to the gray or black mud breccia, as a result of reduction of elements and/or alteration of minerals associated with the oxidation of hydrocarbons. Our results also suggest that greenhouse gases emitted from the mud volcanoes are lowered through a series of methane oxidation reactions and carbon fixation(i.e., through carbonate precipitation). | XU Wang ZHENG Guodong MA Xiangxian Danielle FORTIN David R.HILTON LIANG Shouyun CHEN Zhi HU Guoyi | 2018 | Acta Geologica Sinica(English Edition)2018，92，6： | 1 |
| 2 | 深部地幔中的原始水显示文摘地球上水的起源一直困惑着科学家,因为早期太阳的高温足以蒸发掉那些形成原始地球的早期太阳系星云中的冰质尘埃,因此科学家一般倾向于认为新生的地球应该是"干的",后期通过来自太阳系边缘冰质小天体的撞击获得了水。由于不同来源的水具有不同的H同位素组成,因此地球初始的H同位素组成可以用来示踪水的起源,然而由于水在地表和地球深部之间广泛的循环交换,找到能代表原始地幔的储库并不容易。以前的研究表明, | Lydia J.Hallis Gary R.Huss Kazuhide Nagashima G.Jeffrey Taylor Saemundur A.Halldórsson David R.Hilton Michael J.Mottl Karen J.Meech 夏群科 | 2016 | 矿物岩石地球化学通报2016，35，1： | 0 |
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