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扎河坝坳陷位于阿尔泰造山带与准噶尔盆地之间,属于中亚造山带的一部分,自早古生代以来经历了准噶尔洋盆的打开和闭合等阶段,富含煤炭和金属矿产,也具有一定的油气勘探前景。研究区火山岩和含煤层系发育,地表风化剥蚀严重,对研究其地层发育特征和沉积环境起到了一定的制约。对扎河坝坳陷新富地1井岩芯样品开展沉积岩微量元素测试,分析结果表明,扎河坝坳陷上二叠统为温暖湿润的淡水沉积环境,表明扎河坝坳陷晚二叠世经历了火山活动和陆相淡水沉积2个阶段,印证了准噶尔洋由俯冲消减向陆内阶段转换的过程。该研究对恢复研究区构造演化及沉积古地理特征具有重要意义。 相似文献
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太湖不同营养水平湖区沉积物磷形态与生物可利用磷的分布及相互关系 总被引：31，自引：1，他引：30
采用EDTA螯合剂法和不同的化学提取法,研究了太湖3个不同营养水平湖区中8个位点表层沉积物总磷、各组分磷及生物可利用磷的含量分布,探讨了太湖不同营养水平湖区表层沉积物的释磷潜力和生物可利用磷的来源．结果表明,太湖不同营养水平湖区表层沉积物总磷、无机磷和生物可利用磷含量分布差异较大,且与各湖的营养水平相一致．有机磷含量与有机质和含水率显著相关;沉积物中Fe-P和Ca-P对生物可利用磷的贡献较大,这部分磷具有较大的潜在释放风险． 相似文献
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在我国油气资源对外依存度不断攀升,能源安全形势日益严峻的背景下,油气调查评价和勘探开发仍是能源工作的重中之重.近年来,公益性油气调查工作聚焦自身优势,积极服务于国家能源安全,支撑油气资源管理与矿权体制改革成效显著,在油气勘探的新区、新层、新类型方面不断取得突破性成果.公益性油气调查在新疆塔里木盆地西北部温宿凸起新近系、沙井子构造带志留系,准噶尔盆地南缘的二叠系和三叠系均获得了工业油(气)流;在南方鄂西宜昌、黔北武陵山等复杂构造区的页岩气、松辽盆地的页岩油、四川盆地南部煤层气等资源的勘探均取得了重大突破,这些成果有力带动了能源企业的积极投入与勘探,有效彰显了公益性油气地质调查的引领和示范作用.深层油气资源的安全勘探、油气矿权空白区的基础地质调查及非常规油气的调查与勘探将是我国未来油气勘探重要的接替领域.公益性油气调查将以油气基础地质问题为抓手,积极探索油气勘探接替领域,为油气资源规划和管理做好支撑,力争为国家能源安全保障与重大发展战略做出更大的贡献. 相似文献
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扎河坝坳陷位于阿尔泰造山带与准噶尔盆地之间,属于中亚造山带的一部分,自早古生代以来经历了准噶尔洋盆的打开和闭合等阶段,富含煤炭和金属矿产,也具有一定的油气勘探前景。研究区火山岩和含煤层系发育,地表风化剥蚀严重,对研究其地层发育特征和沉积环境起到了一定的制约。对扎河坝坳陷新富地1井岩芯样品开展沉积岩微量元素测试,分析结果表明,扎河坝坳陷上二叠统为温暖湿润的淡水沉积环境,表明扎河坝坳陷晚二叠世经历了火山活动和陆相淡水沉积2个阶段,印证了准噶尔洋由俯冲消减向陆内阶段转换的过程。该研究对恢复研究区构造演化及沉积古地理特征具有重要意义。 相似文献
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和什托洛盖盆地前人研究工作主要集中在中东部地区,盆地西部基本为勘探空白区。通过在和什托洛盖盆地及周缘开展野外地质调查、样品采集、测试分析工作,整体评价了该区烃源岩特征和勘探潜力。研究表明和什托洛盖盆地发育泥盆系、石炭系和侏罗系3套潜在烃源岩,其中侏罗系为盆地烃源岩的主要发育层段,泥盆系及石炭系为烃源岩的次要发育层段。石油地质条件综合分析认为,和什托洛盖盆地具有一定的勘探潜力,白杨河凹陷、南部斜坡区是有利勘探区带,为下一步勘探方向提供了指导和依据。 相似文献
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Evaluation of phosphorus bioavailability in sediments of the shallow lakes in the middle and lower reaches of the Yangtze River region,China 总被引：3，自引：0，他引：3
Shengrui Wang Xiangcan Jin Qingyun Bu Haiqing Liao Fengchang Wu 《Environmental Earth Sciences》2010,60(7):1491-1498
Phosphorus (P) fractions and their bioavailability in the sediments from the middle and lower reaches of the Yangtze River
region were investigated using different chemical extraction methods. The results show that the contents of bioavailable P
in the sediments extracted by different extraction procedures varied greatly. But their rank order was similar. Potentially
releasable P (PRP) was the largest, followed by algal available P (AAP), NaHCO3 extractable P (Olsen-P), water soluble P (WSP), and readily desorbable P. PRP contributed approximately 60% to total P (TP)
in most sediments, AAP 20%, Olsen-P 15%, WSP 2%, and readily desorbable P (RDP) 0.5%. For the heavily polluted sediments,
their bioavailable P extracted from TP mainly originated from inorganic P (IP), IP mainly originated from NaOH–P, the bioavailable
P concentrations can be evaluated by measuring the concentrations of TP, NaOH–P, and IP. For the slightly polluted sediments,
the bioavailable P can only be evaluated by different chemical extractable methods. 相似文献
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Shaoyong Lu Xiangcan Jin Lili Liang Weiguang Xin Miaozhuang Zheng Da Xu Fengchang Wu 《Environmental Earth Sciences》2013,68(4):1143-1151
The effects of inactivation agents, including common polymeric aluminium (Al) chloride (CPAC) and Ecological Type PAC (UNIC), on phosphorus (P) released from sediment are unclear. To determine these effects, we performed seven experiments using various inactivation agent additions. The experimental schemes used were as follows: (1) CPAC, 15 mg Al L?1; (2) CPAC (15 mg Al L?1) + polyacrylamide (PAM) (0.5 mg L?1); (3) UNIC, 5 mg Al L?1; (4) UNIC, 15 mg Al L?1; (5) UNIC, 60 mg Al L?1; (6) control set without any inactivation agent addition; and (7) alkali shock load (the pH value of overlying water in the scheme 7 was adjusted to 11 by addition of sodium hydroxide to simulate alkali shock load at 13 days after CPAC addition). The experiments were conducted in glass columns, each containing 0.3 L sediment from Lake Dianchi and 3 L of overlying water. The results showed that P release rate decreased as the amount of inactivation agent added increased. P release rate was calculated according to each inactivation agent and the amount of inactivation agent added. Release rate found was in the decreasing order: (6) > (3) > (4) > (1) > (5) > (2). The corresponding rate was calculated to be 7.11, 6.16, 4.55, 1.76, 1.46 and 1.00 mg P m?2 day?1, respectively. Dissolved total P (DTP) was the main form of total P (TP) in the overlying water. After the addition of PAM, the DTP:TP ratio decreased while the dissolved inorganic P (DIP):DTP ratio increased. With increasing the amount of inactivation agents added, both DTP:TP and DIP:TP ratios decreased. Experimental group 3 had similar DTP:TP and DIP:TP ratios to experimental group 6. These results are significant in terms of the large-scale application of inactivation agents for reducing levels of bioreactive P. Alkali shock load (experimental group 7) caused failure in the inactivation of P by CPAC. 相似文献