Organic matter accumulation in the oil shale- and coal-bearing Huadian Basin (Eocene; NE China)
Organic matter accumulation in the oil shale- and coal-bearing Huadian Basin (Eocene; NE China)
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华甸盆地（始新世；中国东北）含油页岩和煤的有机质积累
DOI：
10.1016/j.coal.2012.11.009
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发表时间：
2013
影响因子：
5.6
通讯作者：
Zhen, Zhen1
中科院分区：
文献类型：
--
作者：
Sun, Pingchang1, 2;Sachsenhofer, Reinhard F.2;Liu, Zhaojun1;Strobl, Susanne A.I.2;Meng, Qingtao1;Liu, Rong1;Zhen, Zhen1
华甸盆地位于中国东北部，是一个由始新世非海相沉积构成的断控盆地，属于华甸组。该组由下向上划分为3段：黄铁矿段、油页岩段和碳质页岩段。利用Hd3井的大量地球化学资料和大量井的岩心描述，对控制有机质聚集的因素进行了评价。黄铁矿段有机质含量较低，平均TOC为0.9wt.%。沉积于浅水湖相环境的泥岩含碳量在1 ~ 2wt之间。% TOC（最大）6 wt。%)和干酪根II型（HI 400-600mg HC/g TOC）。干旱的气候阻碍了厚煤的堆积。上覆油页岩段包含13个油页岩层，在地下开采。油页岩段被解释为三级层序。不同体系域沉积的油页岩存在显著差异：2 m厚的低质量煤质油页岩（产油3.5wt）；%)在低地系统区发育。油页岩，厚度可达7m，质量中等（出油率4.1-8.0wt）。%)沉积于海侵体系带（TST）。薄（<3m）优质油页岩（出油率6.4-19.8wt）。%)见于高位系统束（HST）和退行系统束的底部。油页岩层的横向扩展在上第三纪和下第三纪达到最大。在整个深湖环境中沉积的大量油页岩层表明，受构造运动、短期气候周期或有机质生产周期控制的基准面频繁变化。炭质页岩段代表盆地演化的平衡充填—过充填阶段，赋存经济煤层，间或伴有富氢有机质丰富的浅湖相页岩。除此之外，非煤层有机质含量通常较低（平均TOC: 0.9wt.%）。与华甸盆地相反，抚顺盆地始新统发育厚达100米以上的单层油页岩盖层。这表明构造背景和时代相似的盆地在演化上存在较大差异。
The Huadian Basin, located in northeastern China, is a fault-controlled basin filled by Eocene non-marine sediments assigned to the Huadian Formation. The formation is subdivided from bottom to top into three members: Pyrite Member, Oil Shale Member, and Carbonaceous Shale Member. Using bulk geochemical data from borehole Hd3 and core descriptions from a high number of wells, the factors controlling organic matter accumulation have been evaluated. The organic matter content of the Pyrite Member is relatively low (average TOC: 0.9wt.%). Mudstones deposited in shallow lacustrine environments contain between 1 and 2wt.% TOC (max. 6wt.%) and a kerogen Type II (HI 400–600mg HC/g TOC). An arid climate prevented the accumulation of thick coal. The overlying Oil Shale Member contains 13 oil shale layers, which are mined underground. The Oil Shale Member has been interpreted as a 3rd order sequence. Significant differences exist between oil shales deposited in different systems tracts: 2-m-thick coaly oil shale of low-quality (oil yield 3.5wt.%) developed in the lowstand systems tract. Oil shale, up to 7m thick, of moderate quality (oil yield 4.1–8.0wt.%) was deposited during the transgressive systems tract (TST). Thinner (<3m) high quality oil shale (oil yield 6.4–19.8wt.%) is found in the highstand systems tract (HST) and at the base of the regressive systems tract. The lateral extent of the oil shale layers reaches a maximum in the upper TST and the lower HST. The high number of oil shale layers deposited in an overall deep lacustrine environment notifies frequent changes in base level, controlled by tectonic movements, short-term climatic cycles, or cycles in organic matter production. The Carbonaceous Shale Member representing the balanced-fill to overfilled stage of basin evolution hosts economic coal seams, which are occasionally accompanied by shallow lacustrine shales with abundant hydrogen-rich organic matter. Otherwise non-coal layers are typically low in organic matter (average TOC: 0.9wt.%). In contrast to the Huadian Basin, a very thick coal seam overlain by a single oil shale layer more than 100m thick developed in the Eocene Fushun Basin. This indicates major differences in the evolution of basins with similar tectonic setting and age.
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影响因子：
3.5
作者：
F. F. Langford-F.;M. Blanc-Valleron
通讯作者：
F. F. Langford-F.;M. Blanc-Valleron
影响因子：
64.8
作者：
B. Wilkinson
通讯作者：
B. Wilkinson
影响因子：
2.7
作者：
Michael C. Frank;R. Tyson
通讯作者：
Michael C. Frank;R. Tyson
DOI：
--
发表时间：
2005
期刊：
Xinjiang Petroleum Geology
影响因子：
--
作者：
Yan Sheng-ke
通讯作者：
Yan Sheng-ke
影响因子：
3.5
作者：
A. Carroll;K. Bohacs
通讯作者：
A. Carroll;K. Bohacs