渝東北地區(qū)觀音橋段沉積與有機(jī)碳同位素特征及其區(qū)域?qū)Ρ?/H1>
發(fā)布時(shí)間：2018-06-01 00:28
本文選題：觀音橋段 + 五峰組—龍馬溪組��； 參考：《地質(zhì)學(xué)報(bào)》2017年05期
【摘要】：渝東北地區(qū)五峰組—龍馬溪組間觀音橋段厚度不一、沉積特征各異,自西向東對(duì)廟壩渝參1井(YC1)、田壩剖面(TBP)、白鹿剖面(BLP)、九湖四方洞剖面(SFP)和巴東兩河口(LHP)剖面的分析表明,觀音橋段以發(fā)育淺灰色中—薄層狀泥質(zhì)灰?guī)r為主,局部為含介殼泥灰?guī)r層,且強(qiáng)烈風(fēng)化后常呈褐黃色、土黃色。研究區(qū)內(nèi)兩河口剖面為灰黑色泥質(zhì)灰?guī)r,也發(fā)育介殼化石,四方洞剖面觀音橋段表現(xiàn)為粉砂質(zhì)含量的明顯增多。僅田壩剖面和兩河口剖面見赫南特貝化石印模。各剖面有機(jī)碳同位素垂向演化特征相似,具有區(qū)域及全球?qū)Ρ刃?在赫南特期觀音橋段均表現(xiàn)出明顯的碳同位素正漂以及峰值,可能受局部環(huán)境影響,其正漂幅度不盡相同;五峰組至觀音橋段碳同位素呈震蕩性升高,可出現(xiàn)短暫的小型峰值;觀音橋段至龍馬溪組,碳同位素呈現(xiàn)持續(xù)穩(wěn)定的下跌,下跌速度取決于龍馬溪組厚度。
[Abstract]:The thickness and sedimentary characteristics of Guanyinqiao member between Wufeng formation and Longmaxi formation in northeast Chongqing are different. The analysis of YC1, TBPU, Bailu, SFPFPand LHP) sections of Miaoba-Chongqing 1 from west to east of Miaoba-Yu-1, Bailu, Sixiangdong and LHP) shows that, Guanyin Bridge section is mainly composed of grayish meso-thin-layer shaly limestone, which is mainly composed of meso-shell mudstone layer, and it is usually brown-yellow and khaki-yellow after strong weathering. Lianghekou section in the study area is composed of gray black mudstone and fossils. The Quanyinqiao section of Sixiangdong section shows an obvious increase in silty sand content. Only Tianba section and Liangkou section see Hernantebe fossil impression. The vertical evolution characteristics of organic carbon isotopes in different sections are similar and have regional and global contrasts, and there are obvious positive drift and peak values of carbon isotopes in Guanyinqiao section of Hernant period, which may be affected by local environment, and their positive drift ranges are different. The carbon isotopes from Wufeng group to Guanyinqiao section are oscillating, and there can be a short peak value, while from Guanyin bridge section to Longmaxi formation, the carbon isotope shows a steady decline, and the falling speed depends on the thickness of Longmaxi formation.
【作者單位】： 成都理工大學(xué)地球科學(xué)學(xué)院;中國地質(zhì)調(diào)查局成都地質(zhì)調(diào)查中心;國土資源部沉積盆地與油氣資源重點(diǎn)實(shí)驗(yàn)室;
【基金】：四川盆地頁巖氣基礎(chǔ)地質(zhì)調(diào)查項(xiàng)目(DD20160176) 重慶市頁巖氣專項(xiàng)地質(zhì)調(diào)查(渝東北)項(xiàng)目 重慶市頁巖氣勘探有利區(qū)帶優(yōu)選及資源量評(píng)價(jià)研究(渝東北)項(xiàng)目 國家自然科學(xué)基金項(xiàng)目(編號(hào)41672112;41402103)共同資助成果
【分類號(hào)】：P597;P618.13
，
本文編號(hào)：1962042
本文鏈接：http://sikaile.net/kejilunwen/diqiudizhi/1962042.html
本文選題：觀音橋段 + 五峰組—龍馬溪組��； 參考：《地質(zhì)學(xué)報(bào)》2017年05期
【摘要】：渝東北地區(qū)五峰組—龍馬溪組間觀音橋段厚度不一、沉積特征各異,自西向東對(duì)廟壩渝參1井(YC1)、田壩剖面(TBP)、白鹿剖面(BLP)、九湖四方洞剖面(SFP)和巴東兩河口(LHP)剖面的分析表明,觀音橋段以發(fā)育淺灰色中—薄層狀泥質(zhì)灰?guī)r為主,局部為含介殼泥灰?guī)r層,且強(qiáng)烈風(fēng)化后常呈褐黃色、土黃色。研究區(qū)內(nèi)兩河口剖面為灰黑色泥質(zhì)灰?guī)r,也發(fā)育介殼化石,四方洞剖面觀音橋段表現(xiàn)為粉砂質(zhì)含量的明顯增多。僅田壩剖面和兩河口剖面見赫南特貝化石印模。各剖面有機(jī)碳同位素垂向演化特征相似,具有區(qū)域及全球?qū)Ρ刃?在赫南特期觀音橋段均表現(xiàn)出明顯的碳同位素正漂以及峰值,可能受局部環(huán)境影響,其正漂幅度不盡相同;五峰組至觀音橋段碳同位素呈震蕩性升高,可出現(xiàn)短暫的小型峰值;觀音橋段至龍馬溪組,碳同位素呈現(xiàn)持續(xù)穩(wěn)定的下跌,下跌速度取決于龍馬溪組厚度。
[Abstract]:The thickness and sedimentary characteristics of Guanyinqiao member between Wufeng formation and Longmaxi formation in northeast Chongqing are different. The analysis of YC1, TBPU, Bailu, SFPFPand LHP) sections of Miaoba-Chongqing 1 from west to east of Miaoba-Yu-1, Bailu, Sixiangdong and LHP) shows that, Guanyin Bridge section is mainly composed of grayish meso-thin-layer shaly limestone, which is mainly composed of meso-shell mudstone layer, and it is usually brown-yellow and khaki-yellow after strong weathering. Lianghekou section in the study area is composed of gray black mudstone and fossils. The Quanyinqiao section of Sixiangdong section shows an obvious increase in silty sand content. Only Tianba section and Liangkou section see Hernantebe fossil impression. The vertical evolution characteristics of organic carbon isotopes in different sections are similar and have regional and global contrasts, and there are obvious positive drift and peak values of carbon isotopes in Guanyinqiao section of Hernant period, which may be affected by local environment, and their positive drift ranges are different. The carbon isotopes from Wufeng group to Guanyinqiao section are oscillating, and there can be a short peak value, while from Guanyin bridge section to Longmaxi formation, the carbon isotope shows a steady decline, and the falling speed depends on the thickness of Longmaxi formation.
【作者單位】： 成都理工大學(xué)地球科學(xué)學(xué)院;中國地質(zhì)調(diào)查局成都地質(zhì)調(diào)查中心;國土資源部沉積盆地與油氣資源重點(diǎn)實(shí)驗(yàn)室;
【基金】：四川盆地頁巖氣基礎(chǔ)地質(zhì)調(diào)查項(xiàng)目(DD20160176) 重慶市頁巖氣專項(xiàng)地質(zhì)調(diào)查(渝東北)項(xiàng)目 重慶市頁巖氣勘探有利區(qū)帶優(yōu)選及資源量評(píng)價(jià)研究(渝東北)項(xiàng)目 國家自然科學(xué)基金項(xiàng)目(編號(hào)41672112;41402103)共同資助成果
【分類號(hào)】：P597;P618.13
，
本文編號(hào)：1962042
本文鏈接：http://sikaile.net/kejilunwen/diqiudizhi/1962042.html
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