本文選題：滇黔地區(qū) + 拉丁期-卡尼期��； 參考：《中國(guó)地質(zhì)大學(xué)》2016年博士論文

【摘要】：二疊紀(jì)-三疊紀(jì)之交生物大滅絕事件和早三疊世的高溫極端環(huán)境導(dǎo)致生物輻射和生態(tài)系統(tǒng)的復(fù)蘇都受到抑制,直到中-晚三疊世生態(tài)系統(tǒng)全面復(fù)蘇和發(fā)展,生物輻射,分異度直達(dá)頂峰。因此中-晚三疊世的生態(tài)環(huán)境和生物的協(xié)同演化成為新的研究熱門。牙形石作為地層劃分,古環(huán)境恢復(fù)的重要載體,為年代地層學(xué)和古環(huán)境恢復(fù)提供強(qiáng)大的支撐。本研究以華南滇東-黔西地區(qū)多條不同沉積環(huán)境下形成的剖面為載體,對(duì)其進(jìn)行相對(duì)高精度的牙形石生物地層,無(wú)機(jī)碳化學(xué)地層,牙形石磷灰石氧同位素和草莓狀黃鐵礦粒徑大小的統(tǒng)計(jì)研究,并結(jié)合事件地層探討中-晚三疊世生態(tài)環(huán)境以及生態(tài)環(huán)境和生物的協(xié)同關(guān)系。本文研究的剖面主要有:云南省羅平縣菜籽糖剖面,貴州省關(guān)嶺縣天碩剖面,貴州省關(guān)嶺縣臥龍崗剖面,貴州省關(guān)嶺縣巴毛林剖面和貴州省貞豐縣踴躍剖面。這些剖面主要由楊柳井組,竹桿坡組和瓦窯組等巖石地層單元組成。底部:楊柳井組主要有厚層白云質(zhì)灰?guī)r,鈣質(zhì)白云巖組成,該組代表了淺水環(huán)境;中部:竹竿坡組的特征是由薄至中層瘤狀灰?guī)r組成,代表了較深水的環(huán)境;上部:瓦窯組主要由黑色頁(yè)巖,薄層泥灰?guī)r和泥晶灰?guī)r組成,代表了盆地相的環(huán)境。本文取得如下進(jìn)展:1.在貴州省貞豐縣踴躍剖面從中三疊世安尼期-拉丁期至晚三疊世卡尼期共識(shí)別出6個(gè)牙形石帶,由下至上依次為:Paragondolella foliata帶,Quadralella polygnathiformis帶,Quadralella tadpole帶,Quadralella praelindae帶,Quadralella auriformis和Quadralella robusta帶。在云南省羅平縣菜籽塘剖面從下至上共識(shí)別出4個(gè)牙形石帶,分別為:Paragondolella foliata帶,Quadralella polygnathiformis帶,Quadralella auriformis帶和Quadralella robusta帶。在貴州省關(guān)嶺縣天碩剖面自下而上共識(shí)別出2個(gè)牙形石帶,分別為Quadralella polygnathiformis帶和Quadralella robusta帶。依據(jù)牙形石Quadralella polygnathiformis首現(xiàn)層位,暫且標(biāo)定了各剖面拉丁階-卡尼階界線。臥龍崗剖面牙形石產(chǎn)出及沉積特征指示剖面底部層為的時(shí)代為早卡尼期Julian 1/Julian 2之交,而整個(gè)瓦窯組可能延續(xù)到Tuvalian 2。2.華南滇黔地區(qū)卡尼雨季事件發(fā)生在竹竿坡組頂部至瓦窯組底部,即Quadralella auriformis帶頂部至Quadralella robusta帶。華南卡尼雨季事件伴隨著碳酸鹽巖生產(chǎn)終止,黑色頁(yè)巖/砂巖沉積出現(xiàn),無(wú)機(jī)碳同位素存在1.5‰-3‰的負(fù)漂,古海水溫度存在2-5℃升高以及牙形石豐度和多樣性的銳減,以及隨后的海水底層缺氧-硫化。本文認(rèn)為卡尼雨季事件的可能引發(fā)機(jī)制是Wrangellia大火成巖省產(chǎn)生大量溫室氣體,大氣環(huán)流改變,全球變暖,風(fēng)化加強(qiáng),降雨增多,最終形成卡尼雨季事件。3.云南省羅平縣菜籽糖剖面和貴州省貞豐縣踴躍剖面中位于拉丁-卡尼階界線下無(wú)機(jī)碳同位素存在2.5‰左右的負(fù)漂,依據(jù)華南牙形石序列,沉積學(xué)記錄和絕對(duì)年齡,本文認(rèn)為該次無(wú)機(jī)碳同位素的負(fù)漂的可能時(shí)代為拉丁期早期(Fassanian)。4.對(duì)貴州省關(guān)嶺縣臥龍崗剖面瓦窯組草莓狀黃鐵礦粒徑大小的統(tǒng)計(jì),顯示粒徑的平均值在3.5-5.5μm指示底層海水處于硫化-缺氧的狀態(tài),這可能是瓦窯組產(chǎn)出牙形石非常少的直接原因。5.依據(jù)貴州省貞豐縣踴躍剖面和云南省羅平縣菜籽塘剖面Quadralella polygnathiformis分別產(chǎn)于竹竿坡組底部以及剖面伴生牙形石動(dòng)物群,確定華南廣泛分布的“法郎組”底部竹竿坡組的時(shí)代應(yīng)屬于拉丁期-卡尼期。6.貴州省關(guān)嶺縣臥龍崗剖面記錄了華南卡尼雨季事件后碳酸鹽巖連續(xù)沉積厚達(dá)90米,而非直接賴石科組碎屑巖沉積,證實(shí)揚(yáng)子碳酸鹽巖淹沒事件晚于華南卡尼雨季事件,而非同一事件。
[Abstract]:The Permian Triassic Permian mass extinction event and the early three fold high temperature extreme environment have led to the resuscitation of biological radiation and ecosystem, until the comprehensive recovery and development of the mid to late three fold ecosystem, biological radiation, and differentiation to the peak. Therefore, the Synergetic Evolution of the ecological environment and organisms in the middle and late three fold world became the co evolution of the ecological environment and the organism. As an important carrier of stratigraphic division and the restoration of paleoenvironment, odontostines provide strong support for chronostratigraphy and restoration of paleoenvironment. This study takes the profile of a number of different sedimentary environments in the East Southern China Qianxi region as a carrier, and carries out a relatively high degree of dentate biostratigraphy and inorganic carbon chemical formation. The statistical study of apatite apatite oxygen isotopes and the size of strawberry pyrite particle size, combined with the event stratigraphy to explore the middle late three fold ecological environment and the synergistic relationship between the ecological environment and the biological environment. The main sections of this paper are: the rapeseed sugar section in Luoping County, Yunnan Province, Tianshuo section in Guanling County, Guizhou Province, Wolong Guanling County Wolong, Guizhou The post section, the Ba Mao forest section in Guanling County, Guizhou and the Zhenfeng County of Guizhou Province, are mainly composed of Yangliujing formation, bamboo pole slope group and wa kiln group. The thin to middle layer of nodular limestone represents the deeper water environment, and the upper part is composed mainly of black shale, thin mudstone and argillaceous limestone, representing the environment of the basin facies. The following progress has been made in this paper: 1. in Zhenfeng County, Guizhou, 6 teeth were identified from the middle of the middle three anneni period to the late three Carney period. Paragondolella foliata belt, Quadralella polygnathiformis belt, Quadralella tadpole belt, Quadralella praelindae band, Quadralella auriformis and Quadralella robusta belt in the lower first order. 4 toothed stone belts in the rapeseed section of Luoping County, Yunnan Province The Quadralella polygnathiformis band, the Quadralella auriformis band and the Quadralella robusta belt are identified from the bottom of the Tianshuo section in Guanling County, Guizhou Province, which are the Quadralella polygnathiformis band and the Quadralella robusta belt respectively. According to the first occurrence of the odontoid Quadralella polygnathiformis, each of them has been demarcated. The profile Latin - Carney order boundary. The formation and sedimentary characteristics of the ODONTOS in Wollongang section indicate that the age of the bottom layer of the section is the intersection of early Carney phase Julian 1/Julian 2, while the whole tile kiln group may continue to the Carney rainy season in the Tuvalian 2.2. Southern China Yunnan Guizhou region, which occurred at the top of the bamboo pole group to the bottom of the kiln group, that is, Quadralella aurifor. MIS with the top to the Quadralella robusta belt. The Southern China Carney rainy season is accompanied by the termination of the carbonate production, the appearance of black shale / sandstone, the negative drift of 1.5 per thousand -3 per thousand of inorganic carbon isotopes, the increase in the temperature of the ancient sea water, the sharp decrease in the abundance and diversity of the odontoid, and the subsequent hypoxia vulcanization of the bottom of the sea water. The possible initiation mechanism for the Carney rainy season is that the Wrangellia igneous province produces a large amount of greenhouse gases, atmospheric circulation changes, global warming, weathering, increased rainfall, and the eventual formation of the Carney rainy season event,.3. Yunnan Province, Yunnan province and Zhenfeng County, Guizhou Province, which is located in the Latin Carney boundary line with the same inorganic carbon. The negative drift of the position element is about 2.5 per thousand. According to the sequence of ODONTOS in Southern China, the sedimentology record and the absolute age, the possible age of negative drift of the inorganic carbon isotope is the statistics of the size of the grain size of the strawberry shaped pyrite in the early Latin stage (Fassanian).4. in the Wollongang section of Guanling County, Guizhou Province, showing that the average size of the particle size is 3.. 5-5.5 mu m indicates that the bottom sea water is in the state of vulcanization and anoxia, which may be the direct cause of the very few ODONTOS produced in the wa kiln group..5. is produced in the base of the bamboo slope group in Zhenfeng County of Guizhou province and Quadralella polygnathiformis of the rapeseed pond section of Luoping County, Yunnan Province, respectively, and the concomitant conodont fauna of the section is determined in Southern China. The widely distributed "Franc group" at the bottom of the bamboo pole group should belong to the Latin period - Carney period.6. Guizhou Guanling Wollongang section recorded the Southern China Carney rainy season after the precipitation of 90 meters thick carbonate rocks, and not the direct Lai Shike group clastic rock deposition, confirmed that the Yangtze carbonate rock submerge event was later than Southern China Carney rainy season event. Not the same event.
【學(xué)位授予單位】：中國(guó)地質(zhì)大學(xué)
【學(xué)位級(jí)別】：博士
【學(xué)位授予年份】：2016
【分類號(hào)】：Q915;P512.2

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