Early Permian Radiolarians from Babu Ophiolitic Mélange in Southeastern Yunnan
-
摘要: 报道了采自滇东南八布蛇绿混杂岩燧石岩块中的放射虫化石.该放射虫组合包括Pseudoalbaillella scalprata scalprata Holdsworth and Jones, Pseudoalbaillella sakmarensis(Kozur), Pseudoalbaillella lomentaria Ishiga and Imoto, Quadriremis robusta Nazarov and Ormiston, Polyfistula hexalobata Nazarov and Ormiston, Latentifistula texana Nazarov and Ormiston, Latenti fistula crux Nazarov and Ormiston, Tormentum sertulum Nazarov and Ormiston, Naz arovella phlogidea Wang, Ormistonella robusta De Wever and Caridroit, Hegleria mammilla (Sheng and Wang) 等.它以Pseudoalbaillella lomentaria为特征种, 可以与日本、美国及我国西南地区早二叠世放射虫组合对比, 指示扬子板块和印支地块之间的早二叠世沉积盆地为开阔的深水盆地.Abstract: The Early Permian radiolarians were found from the chert of the Babu ophiolitic mélange in southeastern Yunnan. This radiolarian assemblage includes Pseudoalbaillella scalprata scalprata Holdsworth and Jones, Pseudoalbaillella sakmarensis (Kozur), Pseudoalbaillella lomentaria Ishiga and Imoto, Quadriremis robusta Nazarov and Ormiston, Polyfistula hexalobata Nazarov and Ormiston, Latentifistula texana Nazarov and Ormiston, Latentifistula crux Nazarov and Ormiston, Tormentum sertulum Nazarov and Ormiston, Nazarovella phlogidea Wang, Ormistonella robusta De Wever and Caridroit, Hegleria mammilla (Sheng and Wang), et al. It is characterized by Pseudoalbaillella lomentaria and can be correlated with the Early Permian radiolarian assemblages of Japan, USA and southwestern China. This discovery indicates that the Early Permian basin between Yangtze platform and Indosinian Massif was a wide pelagic basin.
-
Key words:
- Early Permian /
- radiolarian /
- ophiolitic mélange /
- pelagic basin /
- Babu region of southeastern Yunnan
-
图 1 放射虫化石位置和研究区地质图[2]
1.公路; 2.地质界线; 3.蛇绿混杂岩; 4.台地碳酸盐岩; 5.三叠系浊积岩; 6.化石点位置
Fig. 1. Radiolarian location and geological map of the study area
-
[1] 吴浩若, 邝国敦, 王忠诚. 广西晚古生代构造沉积背景的初步研究[J]. 地质科学, 1997, 32(1) : 11-15. https://www.cnki.com.cn/Article/CJFDTOTAL-DZKX199701001.htmWu H R, Kuang G D, Wang Z C. Preliminary study on Late Paleo zoic tectonic sedimentary settings in Guangxi [J]. Scientia Geologica Sinica, 1997, 32(1) : 11-15. https://www.cnki.com.cn/Article/CJFDTOTAL-DZKX199701001.htm [2] Zhong D L, Wu G Y, Ji J Q, et al. Discovery of ophiolite Southeast Yunnan, China[J]. Chinese Science Bulletin, 1999, 44(1) : 36-40. doi: 10.1007/BF03182880 [3] Ishiga H. Paleozoic radiolarians[A]. In : Ichikawa K, Mizutani S, Hara I, et al, eds. Pre-Cretaceous terranes of Japan[C]. Osaka: Nippon Insa tsu Shuppan Co Ltd, 1990.285-295. [4] Blome C D, Reed K M. Radiolarian biostratig raphy of the Quinn River Formation, Black Rock terrane, north-central Nevada: correlations with eastern Klamath terrane geology [J]. Micropaleontology, 1995, 41(1) : 49-68. doi: 10.2307/1485881 [5] Wu H R, Kuang G D, Xian X Y, et al. The Late Paleozoic radiolarian cherts in southern Guang xi and preliminary exploration on Paleo-Tethys in Guangxi[J]. Chinese Science Bulletin, 1994, 39(12) : 1025-1029. [6] 吴浩若, 咸向阳, 邝国敦. 广西南部晚古生代放射虫组合及其地质意义[J]. 地质科学, 1994, 29(4) : 339-345. doi: 10.3321/j.issn:0563-5020.1994.04.002Wu H R, Xian X Y, Kuang G D. Late Paleozoic radiolarian assemblages of southern Guangxi and its geological significance[J]. Scientia Geologica Sinica, 1994, 29 (4) : 339-345. doi: 10.3321/j.issn:0563-5020.1994.04.002 [7] Wang Y J, Cheng Y N, Yang Q. Biostratigraphy and systematics of Permian radiolarians in China[J]. Palaeoworld, 1994, 4 : 172-202. [8] Kozur H. Albaillellidea (Radiolaria) aus dem Unterperm des Vorurals[J]. Geol Palaeontol Mitt Innsbruck, 1981, 10(8) : 263-274. [9] 冯庆来. 放射虫古生态的初步研究[J]. 地质科技情报, 1992, 11(2) : 41-46. https://www.cnki.com.cn/Article/CJFDTOTAL-DZKQ199202011.htmFeng Q L. A preliminary study on the radiolarian palaeoecology[J]. Geological Science and Technology Information, 1992, 11(2) : 41-46. https://www.cnki.com.cn/Article/CJFDTOTAL-DZKQ199202011.htm -
下载:
点击查看大图
图(3)
计量
- 文章访问数: 3472
- HTML全文浏览量: 114
- PDF下载量: 1
- 被引次数: 0
