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1.
广西桂林地区晚三叠世孢粉组合及其地层意义 总被引：1，自引：0，他引：1
广西桂林地区首次发现晚三叠世孢粉化石２７属３７种,可称为Ｄｉｃｔｙｏｐｈｙｌｉｄｉｔｅｓ－Ｃａｎａｌｉ－ｚｏｎｏｓｐｏｒａ－Ｏｖａｌｉｐｏｌｉｓ－Ｒｉｃｃｉｓｐｏｒｉｔｅｓ组合,其中的主要属种在国内外均为晚三叠世的重要分子,并可与我国华南地区和欧洲有关晚三叠世孢粉组合进行对比。因此,当前组合的地质时代属于晚三叠世,这填补了桂林地区中生代地质发展史中的一个空白。 相似文献
2.
对六号煤层近七千粒孢粉的系统分析，建立Ｇｕｌｉｓｐｏｒｉｔｅｓ－Ｔｈｙｍｏｓｐｏｒｉｔｅｓ－Ｃｙｃｌｏｇｒａｎｉｓ－ｐｏｒｉｔｅｓ－Ｌａｅｖｉｇａｔｏｓｐｏｒｉｔｅｓ－Ｆｌｏｒｉｎｉｔｅｓ组合，并进一步建立了煤层上中下的分段亚组合：ｃ．Ｇｕｌｉｓｐｒｉｔｅｓ－Ｔｈｙｍｏｓｐｏｒｉｔｅｓ亚组合ｂ．Ｇｕｌｉｓｐｏｒｉｔｅｓ－Ｔｈｙｍｏｓｐｏｒｉｔｅｓ－Ｆｌｏｒｉｎｉｔｅｓ－Ｃｙｃｌｏｇｒａｎｉｓｐｏｒｉｔｅｓ亚组合ａ．Ｃｒａｓｓｉｓｐｏｒａ－Ｆｌｏｒｉｎｉｔｅｓ－Ｌｙｃｏｓｐｏｒａ－Ｌａｅｖｉｇａｔｏｓｐｏｒｉｔｅｓ亚组合α亚组合指示时代为石炭世，ｃ亚组合指示时代二叠纪，ｂ亚组合属于过渡类型。据此对本区含煤地层进行时代划分并与区内外对比。 相似文献
3.
大灰厂组沉积在北京西部大灰厂一带发育良好。该组由陆相火山碎屑砂岩、粉砂岩、页岩及砾岩组成，富含狼翅鱼、叶肢介、拟蜉蝣等动物化石和孢子花粉化石，厚度１２０－２００米。与下伏东狼沟组整合接触，与上覆辛庄组假整合接触。其孢粉组合是以ｃｌａｓｓｏｐｏｌｌｉｓ占显著优势为特征（６０－８０％）．含有较多Ｃｉｃａｔｒｉｃｏｓｉｓｐｏｒｉｔｅｓ，Ｌｙｇｏｄｉｕｍｓｐｏｒｉｔｅｓ及少量Ｃｉｃａｔｒｉｃｏｓｉｓｐｏｒｉｔｅｓ、Ａｐｐｅｎｄｉｃｉｓｐｏｒｉｔｅｓ、Ａｅｑｕｉｔｒｉｒａｄｉｔｅｓ、Ｈｓｕｉｓｐｏｒｉｔｅｓ及Ｄｅｎｓｏｉｓｐｏｒｉｔｅｓｖｅｌａｔｕｓ，Ｄ．ｍｉｃｒｏｒｕｇｕｌａｔｕｓ等。与国内外早白垩世的孢粉组合比较，时代为早白垩世韦尔登期。属于旱的热带和亚热带气候。 相似文献
4.
内蒙古二连盆地早三叠世地层及孢粉组合的发现 总被引：3，自引：2，他引：1
二连盆地曾被认为是缺失三叠纪沉积的地区。通过阿拉坦合力凹陷坦参１井的孢粉化石分析,首次证实了在二连盆地存在早三叠世地层。坦参１井的下三叠统的视厚度１ ３３９ｍ （井深５５８～１ ８９７ｍ ）,以紫红色、棕红色的泥岩为主,夹灰绿色泥岩,向下岩性变粗,含砾泥岩、砂砾岩增加,与上覆侏罗系及下伏上二叠统皆呈不整合接触。井深７００～１ ８９６ｍ 产以Ｌｉｍ ａｔｕｌａｓｐｏｒｉｔｅｓ大量出现、Ｔａｅｎｉａｅｓｐｏｒｉｔｅｓ具一定含量、出现Ｌｕｎｄｂｌａｄｉｓｐｏｒａ、Ａｒａｔｒｉｓｐｏｒｉｔｅｓ和Ｌｕｅｃｋｉｓｐｏｒｉｔｅｓ为主要特征的早三叠世孢粉化石组合。这一发现对重新认识二连盆地的地质发育历史颇有意义 相似文献
5.
准噶尔盆地东北缘克拉美丽地区石炭、二叠纪地层的孢粉学研究，仅在早石炭世的塔木岗组、滴水泉组和晚二叠世的平地泉组中发现不很丰富的孢粉化石，可划分为与上述３个组相对应的３个孢粉组合，被依次称为Ｄｉｃｔｙｏｔｒｉｌｅｔｅｓ－Ｌｙｃｏｓｐｏｒａ组合、Ｃｒａｓｓｉｓｐｏｒａ－Ｐｕｎｃｔａｔｉｓｐｏｒｉｔｅｓ－Ｓｔｅｎｏｚｏｎｏｔｒｉｌｅｔｅｓ组合和ｐｉｔｙｏｓｐｏｒｉｔｅｓ－Ｔｏｒｉｓｐｏｒａ组合。经孢粉组合特征讨论及与国内外同期孢粉组合对比，这３个组合或３个组的地质时代可初步确定为早石炭世早期的杜内期、早石炭世晚期早维宪期和晚二叠世中期的中欧克期。 相似文献
6.
对潮水盆地侏罗系陆相含煤地层由下而上建立了五个孢粉组合带,在组合三建立了两个亚组织。①Ｃｙａｔｈｉｄｉｔｅｓ－Ｃｈａｓｍａｔｏｓｐｏｒｉｔｅｓ－Ｄｉｓａｃｉｔｅｓ组合（Ｊ１＾１）。②Ｃｙａｔｈｉｄｉｔｅｓ－ｃｈａｓｍａｔｏｓｐｏｒｉｔｅｓ－ｃｙｃａｄｏｐｉｔｅｓ组合（Ｊ３＾１）。③Ｃｙａｔｈｉｄｉｔｅｓｍｉｎｏｒ－Ｃｙｃａｄｏｐｉｔｅｓ ｔｙｐｉｃｕｓ组合（Ｊ１＾２）;上部：Ｃｙｃａｄｏｐｉｔｅｓ 相似文献
7.
吐哈盆地台北凹陷地区井下中侏罗统煤系地层中发现了丰富的孢粉化石，自下而上的西山密组、三间房组和七克台组分别建立了孢粉组合，依次为Ｃｙａｔｈｉｄｉｔｅｓ－Ｃｙｃａｄｏｐｉｔｅｓ－Ｑｕａｄｒａｅｃｕｌｉｎａ组合、Ｃｙａｔｈｉｄｉｔｅｓ－Ｃｌａｓｓｏｐｏｌｌｉｓ－Ｐｉｃｅｉｔｅｓ和ＧｒａｎｕｌａｔｉｓｐｏｒｉｔｅｓＣｌａｓｓｏｐｏｌｌｉｓ－Ｐｏｄｏｃａｒｐｉｄｉｔｅｓ组合；通过组合特征分析和孢粉组合对比，认为上述３个组合均为中侏罗世产物，根据各组的上下关系和重要分子的分布可以推测它们分别属于中侏罗世的早期、中期和晚期。 相似文献
8.
坨里组主要分布在北京西山坨里－大灰厂白垩纪沉积盆地的西部或西南部。是一套以砾岩为主的陆相碎屑沉积。含有丰富的动、植物及孢子花粉化石。孢粉组合是以Ｃｉｃａｔｒｉｃｏｓｉｓｐｏｒｉｔｅｓ－Ｄｅｎｓｏｉｓ－ｐｏｒｉｔｅｓ－ｃｌａｓｓｏｐｏｌｌｉｓ为代表，它们在组合中具有较高的含量，类型丰富多彩。根据组合中孢子和花粉的地层分布及国内外孢粉组合比较，定其时代为早白垩世早中期（凡兰吟—戈特里夫期）。气候为半干旱—干旱的热带。亚热带。 相似文献
9.
钻井资料证实，内蒙巴彦浩特盆地东部保存有较完整的石炭系，其中上石炭统羊虎沟组厚达４５９．６ｍ。经７２块岩样分析鉴定，共发现６２属１１９种孢粉，含６个新种。可概括为上下两个孢粉组合，上组合称Ｄｅｎｓｏｓｐｏｒｉｔｅｓｂｅｌｕｌｕｓ－Ｃｒａｓｓｉｓｐｏｒａｌａｔｉｇｒａｎｉｆｅｒ－Ｌｙｃｏｓｐｏｒａｇｒａｎｕｌａｔａ（简称ＢＬＧ）组合，下组合称Ｃｒａｓｉｓｐｏｒａｌａｔｉｇｒａｎｉｆｅｒ－Ｃａｍｐｔｏｒｉｌｅｔｅｓｒｅｔｉｃｕｌｏｆｏｒｍｉｓ－Ｖｅｓｔｉｓｐｏｒａｃｏｓｔａｔａ（简称ＬＲＣ）组合。地质时限为晚石炭世中期羊虎沟组（维斯法期Ａ—Ｃ）。 相似文献
10.
巴彦浩特盆地的上石炭统靖远组与羊虎沟组为连续沉积,厚度４７７．５ｍ。经２９块岩样分析鉴定,发现孢子花粉５１属９５种（含２新种）和３粒不能鉴定的分子。根据孢粉的纵向演化,可分为上下两个组合带,下组合：Ｔｒｉｐａｒｔｉｔｅｓｖｅｔｕｓｔｕｓ－Ｔｒｉｑｕｉｔｒｉｔｅｓｔｒｉｂｕｌａｔｕｓ组合（简称ＶＴ带）,分布于巴参２井３７７９～３５７０ｍ井段,该孢子带具环孢类含量较低,未发现单缝孢Ｌａｅｖｉｇａｔｏｓｐｏｒｉｔｅｓ和Ｐｕｎｃｔａｔｏｓｐｏｒｉｔｅｓ以及不能归类的Ｔｒｉｎｉｄｕｌｕｓｄｉａｍｐｈｉｄｉｏｓ;上组合：Ｓｉｎｕｓｐｏｒｅｓｓｉｎｕａｔｕｓ—Ｃｒａｓｉｓ－ｐｏｒａｋｏｓａｎｋｅｉ组合（简称ＳＫ带）,分布于同一井的３５７０～３３０１．５ｍ井段,孢粉丰度较下组合高得多,具环孢子含量一般在５０％以上,花粉含量增高。地质时代属晚石炭世早期（纳缪尔Ｂ—Ｃ期）。 相似文献
11.
HE Zhen-jian Geological Scientific Research Institute of Shengli Oilfield Company SINOPEC Dongying 《地层学杂志》2007,(Z2)
在实测四棵树剖面的基础上,详细研究了其孢粉组合特征,建立了5个孢粉组合:1)Cameratitriletes和Zonotriletes-Protopinus-Cycadopites组合,2)Cyatheaceae-Pinaceae-Cycadopites组合,3)Cyatheaceae-Pinaceae-Quadraeculina-Cycadopites组合,4)Cyatheaceae-Quadraeculina-Piceaepollenites组合和5)Cyatheaceae-Clas-sopollis-Pinaceae组合,分别产于上三叠统的小泉沟群、下侏罗统的八道湾组和三工河组、中侏罗统的西山窑组和头屯河组。根据孢粉组合特征,结合岩性和沉积及区域资料,将三叠系-侏罗系界线定于38层和39层之间。 相似文献
12.
新疆库车盆地第三纪形成的陆-海过渡碳酸盐岩 总被引：2，自引：0，他引：2
新疆的库车-拜城-阿克苏一带,广泛沉积中、新生代沉积,从沉积物组合、分布范围等特点考虑,三叠系至下第三系的沉积基本是在天山山前拗陷范围内的盆地中进行的,特别是早第三纪时期,浅水盆地蒸发岩相更为明显,而至晚第三纪,边缘凹陷的特点才逐渐表现出来,因此,本文将这一范围仍称之为库车盆地。 相似文献
13.
14.
新疆拜城阿合组、阳霞组及克孜勒努尔组的孢粉组合 总被引：6，自引：0，他引：6
拜城地区中生代陆相地层非常发育.作者在阿合组、阳霞组和克孜勒努尔组中获得了不少的孢粉化石,共鉴定有58属,93种,其中2新种和2新联合种. 相似文献
15.
H. Zöllner K. Reicherter P. Schikowsky 《International Journal of Earth Sciences》2008,97(5):1013-1027
The pre-Alpine structural and geological evolution in the northern part of the North German Basin have been revealed on the
basis of a very dense reflection seismic profile grid. The study area is situated in the coastal Mecklenburg Bay (Germany),
part of the southwestern Baltic Sea. From the central part of the North German Basin to the northern basin margin in the Grimmen
High area a series of high-resolution maps show the evolution from the base Zechstein to the Lower Jurassic. We present a
map of basement faults affecting the pre-Zechstein. The pre-Alpine structural evolution of the region has been determined
from digital mapping of post-Permian key horizons traced on the processed seismic time sections. The geological evolution
of the North German Basin can be separated into four distinct periods in the Rerik study area. During Late Permian and Early
Triassic evaporites and clastics were deposited. Salt movement was initiated after the deposition of the Middle Triassic Muschelkalk.
Salt pillows, which were previously unmapped in the study area, are responsible for the creation of smaller subsidence centers
and angular unconformities in the Late Triassic Keuper, especially in the vicinity of the fault-bounded Grimmen High. In this
area, partly Lower Jurassic sediments overlie the Keuper unconformably. The change from extension to compression in the regional
stress field remobilized the salt, leading to a major unconformity marked at the base of the Late Cretaceous. 相似文献
16.
With the aim of constraining the influence of the surrounding plates on the Late Paleozoic–Mesozoic paleogeographic and tectonic evolution of the southern North China Craton (NCC), we undertook new U–Pb and Hf isotope data for detrital zircons obtained from ten samples of upper Paleozoic to Mesozoic sediments in the Luoyang Basin and Dengfeng area. Samples of upper Paleozoic to Mesozoic strata were obtained from the Taiyuan, Xiashihezi, Shangshihezi, Shiqianfeng, Ermaying, Shangyoufangzhuang, Upper Jurassic unnamed, and Lower Cretaceous unnamed formations (from oldest to youngest). On the basis of the youngest zircon ages, combined with the age-diagnostic fossils, and volcanic interlayer, we propose that the Taiyuan Formation (youngest zircon age of 439 Ma) formed during the Late Carboniferous and Early Permian, the Xiashihezi Formation (276 Ma) during the Early Permian, the Shangshihezi (376 Ma) and Shiqianfeng (279 Ma) formations during the Middle–Late Permian, the Ermaying Group (232 Ma) and Shangyoufangzhuang Formation (230 and 210 Ma) during the Late Triassic, the Jurassic unnamed formation (154 Ma) during the Late Jurassic, and the Cretaceous unnamed formation (158 Ma) during the Early Cretaceous. These results, together with previously published data, indicate that: (1) Upper Carboniferous–Lower Permian sandstones were sourced from the Northern Qinling Orogen (NQO); (2) Lower Permian sandstones were formed mainly from material derived from the Yinshan–Yanshan Orogenic Belt (YYOB) on the northern margin of the NCC with only minor material from the NQO; (3) Middle–Upper Permian sandstones were derived primarily from the NQO, with only a small contribution from the YYOB; (4) Upper Triassic sandstones were sourced mainly from the YYOB and contain only minor amounts of material from the NQO; (5) Upper Jurassic sandstones were derived from material sourced from the NQO; and (6) Lower Cretaceous conglomerate was formed mainly from recycled earlier detritus.The provenance shift in the Upper Carboniferous–Mesozoic sediments within the study area indicates that the YYOB was strongly uplifted twice, first in relation to subduction of the Paleo-Asian Ocean Plate beneath the northern margin of the NCC during the Early Permian, and subsequently in relation to collision between the southern Mongolian Plate and the northern margin of the NCC during the Late Triassic. The three episodes of tectonic uplift of the NQO were probably related to collision between the North and South Qinling terranes, northward subduction of the Mianlue Ocean Plate, and collision between the Yangtze Craton and the southern margin of the NCC during the Late Carboniferous–Early Permian, Middle–Late Permian, and Late Jurassic, respectively. The southern margin of the central NCC was rapidly uplifted and eroded during the Early Cretaceous. 相似文献
17.
羌塘盆地是我国陆域上面积最大的海相盆地,前人对该盆地构造演化过程及其油气远景存在截然不同的观点。以最近完成的1︰ 5万地质调查为基础,本文再次讨论了南羌塘盆地构造演化过程及其油气远景。羌塘盆地中央近东西向的羌中隆起山脉将羌塘盆地分为南、北两部分。最近的研究表明,在寒武-奥陶纪之交,南、北羌塘块体被古大洋分隔开。北羌塘盆地南缘形成的晚三叠-早侏罗世的那底岗日组火山岩,其上部为流纹岩,表明晚三叠世南羌塘块体北向俯冲于北羌塘块体之下,在南羌塘块体北部形成了富含有机质的前陆盆地。南羌塘盆地南缘发育一套代表成熟海盆的侏罗纪复理石建造,表明南羌塘南部地区在早侏罗世具有被动大陆边缘的特点,随着南部班公-怒江洋的扩张,在南、北羌塘块体内分别沉积了侏罗纪-早白垩世的浅海相地层,以富含有机质礁灰岩为特征。盆地内部孕育了巨厚的晚白垩-古新世陆源碎屑岩,不整合覆盖于早期海相沉积岩之上,表明在该时期南羌塘块体逐渐从被动大陆边缘海相盆地转变为陆相盆地。新生代时期,印度与亚洲大陆持续汇聚,南羌塘盆地南向逆冲于拉萨块体之上,盆地内发育了多条大型逆冲断裂带,再次将盆地内部的上三叠统、侏罗系、白垩系富含有机质的海相礁灰岩深埋,这有利于油气资源的生成与保存。横跨南羌塘盆地的构造剖面显示盆地内部主要大型逆冲断裂带之间,构造变形较弱,发育宽缓的向斜构造,向斜核部发育新生代陆相地层,推测该新生代陆相地层之下保存有深埋的富含有机质的海相地层,因此,南羌塘盆地逆冲断裂带下盘和宽缓向斜核部区域可能具有良好的油气资源前景。 相似文献
18.
Liang Luo Jia-Fu Qi Ming-Zheng Zhang Kai Wang Yu-Zhen Han 《International Journal of Earth Sciences》2014,103(6):1553-1568
Upper Triassic to Upper Jurassic strata in the western and northern Sichuan Basin were deposited in a synorogenic foreland basin. Ion–microprobe U–Pb analysis of 364 detrital zircon grains from five Late Triassic to Late Jurassic sandstone samples in the northern Sichuan Basin and several published Middle Triassic to Middle Jurassic samples in the eastern Songpan–Ganzi Complex and western and inner Sichuan Basin provide an initial framework for understanding the Late Triassic to Late Jurassic provenance of western and northern Sichuan Basin. For further understanding, the paleogeographic setting of these areas and neighboring hinterlands was constructed. Combined with analysis of depocenter migration, thermochronology and detrital zircon provenance, the western and northern Sichuan Basin is displayed as a transferred foreland basin from Late Triassic to Late Jurassic. The Upper Triassic Xujiahe depocenter was located at the front of the Longmen Shan belt, and sediments in the western Sichuan Basin shared the same provenances with the Middle–Upper Triassic in the Songpan–Ganzi Complex, whereas the South Qinling fed the northern Sichuan Basin. The synorogenic depocenter transferred to the front of Micang Shan during the early Middle Jurassic and at the front of the Daba Shan during the middle–late Middle Jurassic. Zircons of the Middle Jurassic were sourced from the North Qinling, South Qinling and northern Yangtze Craton. The depocenter returned to the front of the Micang Shan again during the Late Jurassic, and the South Qinling and northern Yangtze Craton was the main provenance. The detrital zircon U–Pb ages imply that the South and North China collision was probably not finished at the Late Jurassic. 相似文献
19.
哈密坳陷早三叠世古生物记录甚少。从哈参 2井 80 1.5 m- 16 39.5 m井段的泥岩中发现了较为丰富的孢粉化石 ,并可划分为两个组合 :L imatulasporites- Cyclogranisporites- Alisporites组合和 L imatulasporites- L undbladis-pora- Taeniaesporites组合。根据孢粉组合特征及其对比 ,两组合的地质时代应属早三叠世 ,这为哈密坳陷确立下三叠统的存在提供了重要的古生物依据 相似文献
20.
本文基于塔里木盆地原油中发现的８９属１８３种孢子花粉化石和１６属２７种菌藻类化石的研究，通过孢粉化石的油源对比确认中代陆相油源的重要贡献、并根据孢子花粉母体植物和藻类的生态特征讨论了油源岩形成的环境。 相似文献