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Hubei Zigui basin sequence stratigraphy


Hubei trillion 9-3 Basin sequence stratigraphy to late Triassic slightly expanded scope. Tong, Chuk Yuen to the lower part of the main river sediments, and the underlying Jiuligang group lacustrine sedimentary contacts between the continuous deposition of the majority of integration (such as Badong red coal, cattle and Icheon Dongping County South and other places to build ), west of the basin of the Upper Triassic and Lower Jurassic strata between the apparent lack neither, also could not find a reasonable contact interface, lithology and paleontology of its appearance, especially in plants and pollen are combined in the vertical transition, showing continuous deposition characteristics. Middle of a section of river erosion due to erosion and the performance of parallel unconformity of the basin east of individual lots is overlap in the early Middle Triassic Badong group, Jialingjiang above (such as Xingshan Daxiakou, Jia shops and Zigui County cultural centers, etc.). The bottom of the quartz sandstone, conglomerate, with a thick cake of the characteristics of the East, mainly in the lateral stacking, tip off the west lenticular,knock off oakleys, or phase into a siltstone, indicating provenance from the eastern anticline and Huangling surrounding strata. Basin west of the lake to the lower part of the main places east of river and lake facies,true religion outlet, central part of the Lake - shallow lake, the local emergence of deep lake, shallow lake - Lake of the upper phase. Middle Jurassic Qianfoya group Shaximiao period,Oakley sunglasses sale, located in the edge of the river basin, the lake, delta deposits in the lake basin center is often accompanied with variegated or red rocks mainly semi-arid deposition. To Late Jurassic, uplift of the basin again and subjected to long-term erosion, Suining, Penglai group of inherited and maintained in the Jurassic sedimentary characteristics of arid and semi-arid rivers, the lake, deltaic deposition, until the Mesozoic Zigui basin where a close. Zigui basin experienced uplift and from marine to continental, and settlement, expansion, contraction is relatively stable, and ended with the deposition of basin evolution. This article is in the 1:250,000 regional geological surveys Shennongjia pieces of all my colleagues to work together on the basis of complete, Professor Wu Chuanrong senior engineer, senior engineer Professor Wang Jianxin, provided guidance, in particular, Professor Jin Jingwei senior engineers have carefully reviewed the full text, and made valuable comments on the manuscript. References: [1] Bureau of Geology and Mineral Resources of Hubei Province. Regional Geology of Hubei Province [M]. Beijing: Geological Publishing House,herve leger skirts, 1990. [2] Wang Xiaofeng, waiting. Yangtze River Three Gorges area protection and valuable geological heritage Archean Mesozoic multiple stratigraphic subdivision and sea-level changes in [M]. Beijing: Geological Publishing House, 2002. [3] Chen Huiming, etc. Exi Zigui Basin Jurassic Xiangxi stratotype of the new group [J]. Journal of Stratigraphy, 2002,26 (5): 187 - 192. SEQUENCESTRATIGRAPHICCHARACTERISTICSOFZIGUIBASININ HUBEIYUJianhua (SumeyofRegionalGeologyandMineralResources, Wuhan, Hubei430034) Abstract: Basedonthegeologicalsurveyresultsofl: 250000ShennongjiaSheet, itisadvancedthatthecontactplanebetweenthebottomstr ataofZiguibasinanditsunderlyingstrata - BadongFormationshowsconformity,mulberry bags uk, parallelunconformityandunconformityofoverlapfromwe sterntoeastern, whichrevealsthesignificantchangeofsedimentaryenvir onmentandsedimentaryfaciescausedbyIndosinianmoveme ntoccurredrightatthattime. BadongFormationistheresultofcontinental-oceanicinteractivefaciessedimentaryandZiguibasinis theresultofintra-continentalbasinaldepositing. Keywords: Ziguibasin; Sequencestrata; Basinevolution
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