“路易贝贝”产出层位时代及其古环境
The geological age and paleoenviron- ment of Baby Louiebearing strata
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摘要: “路易贝贝”恐龙胚胎化石产于中国河南省南阳市西峡县阳城乡，位于西峡盆地上白垩统高沟组下（底）部，是Macroelon-gatoolithus xixaensis（西峡巨型长形蛋）的胚胎骨骼化石。西峡盆地上白垩统自下而上划分为高沟组、马家村组、寺沟组。高沟组产有丰富的恐龙蛋化石和少量恐龙骨骼化石，以及少量的双壳类、腹足类、介形类、轮藻、植物孢粉、植物化石碎片和丰富的遗迹化石。依据上述化石的地质时代并结合高沟组与上覆马家村组整合接触关系和寺沟组化石组合情况，以及高沟组与下伏泥盆系南湾组角度不整合接触关系和周边相邻盆地的地层对比，将西峡盆地高沟组地质时代置于晚白垩世中晚期的康尼亚克期（Coniacian）。高沟组下、中部为半干旱温热气候条件下的红色陆相类磨拉石建造的陆源碎屑岩，属间歇性的、以牵引流为主的浑水河流冲积扇沉积物；高沟组上部为冲积扇和辫状河沉积。“路易贝贝”所在层位的古地理环境是冲积扇扇端朝向南的、缓坡状宽阔平坦的冲积扇扇面，可归入冲积扇相-扇端亚相-漫流微相。Abstract: "Baby Louie" dinosaur fossil embryo, located at the bottom of Upper Cretaceous Gaogou Formation in Xixia Basin, was excavated from Zhaoying Village of Yangcheng Township in Xixia County of Nanyang City, Henan Province. Upper Cretaceous strata of Xixia Basin can be divided from bottom to top into Gaogou Formation, Majiacun Formation and Sigou Formation. "Baby Louie" is embryonic skeleton fossil of Macroelongatoolithus xixaensis. Gaogou Formation is rich in dinosaur egg fossils and little dinosaur bone fossils as well as a few fossil fragments of bivalve, gastropods, Ostracods, Charophyceae, plant pollen, and plant fossil together with abundant trace fossils. According to geological age of fossils in combination with conformable contact between Majiacun Formation and Gaogou Formation as well as fossil assemblage of Sigou Formation, angular contact between Gaogou Formation and Lower Devonian Nanwan Formation and stratigraphic correlation with surrounding basin layers, the authors hold that geological epoch of Gaogou Formation in Xixia Basin should be Late Cretaceous Coniacian. The lower and middle Gaogou Formation seems to be terrigenous clastic rocks of semi-arid red continental type molasse-like formation belonging to alluvial fan and braided river sedimentation of intermittent muddy waters, whereas the upper part of Gaogou Formation seems to be alluvial fan and traction current deposit. The horizontal paleo-geographic environment of "Baby Louie" is flat and wide alluvial fan facing south at the alluvial end, which can be classified as alluvial fan facies-fan end subfacies-flowing microfacies.
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Key words:
- "Baby Louie" /
- Gaogou Formation /
- Coniacian of Late Cretaceous /
- alluvial fan /
- semi-arid warm climate
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[1] 蒲含勇,吕君昌,杨杨,等.恐龙宝宝传奇"路易贝贝"恐龙化石回家记[M].长沙:湖南科学技术出版社,2014:20-44.
[2] 蒲含勇,吕君昌,杨杨."美漂"小恐龙"路易贝贝"恐龙化石回家记[J].资源导刊(地质旅游版),2014,11:6-37.
[3] 王德有,冯进城,朱世刚,等.中国河南恐龙蛋和恐龙化石[M].北京:地质出版社,2008:62-96.
[4] 河南省地质矿产局.中华人民共和国地质矿产部地质专报—区域地质第17号河南省区域地质志[M].北京:地质出版社,1989:245-257.
[5] 石铨曾,尉向东,李明立,等.河南省东秦岭山脉北缘的推覆构造及伸展拆离构造[M].北京:地质出版社,2004:3-14.
[6] 胡斌,等.河南省中生代岩相古地理研究[M].北京:煤炭工业出版社,2014:99-242.
[7] 王德有,周世全.西峡盆地新类型恐龙蛋化石的发现[J].河南地质,1995,13(4):262-267.
[8] 周世全,赵树林,朱广彬,等.中国南阳恐龙蛋[M].武汉:中国地质大学出版社,2005:13-28.
[9] 周世全,崔保建,郭一峰,等.走近恐龙蛋世界[M].武汉:中国地质大学出版社,2010:1-39.
[10] 河南省地质矿产局.全国地层多重划分对比研究:河南省岩石地层[M].武汉:中国地质大学出版社,1997:259-263.
[11] 周世全,韩世敬,张永才.河南西峡盆地晚白垩世地层[J].地层学杂志,1983,7(1):64-70.
[12] 周世全,罗铭玖,王德有,等.豫西南晚白垩世地层时代研究的进展[J].地层学杂志,1997,(2):51-55.
[13] 周世全,王德有,冯祖杰.豫西南区晚白垩世古气候的初步研究[J].岩相古地理,1997,17(1):27-33.
[14] 王德有,何萍,张克伟.河南省恐龙蛋化石研究[J].河南地质,2001,18(1):15-31.
[15] 方晓思,程政武,张志军,等.豫西南-鄂西北一带恐龙蛋化石演化序列与环境变迁[J].地球学报,2007,28(2):97-110.
[16] 王德有,陈丕基,陈金华,等.河南西峡盆地含恐龙蛋地层中无脊椎动物化石的首次发现[J].古生物学报,2006,45(4):494-497.
[17] 陈金华,王德有,冯进城,等.河南西峡盆地晚白垩世含恐龙蛋地层中的双壳类[J].古生物学报,2007,46(3):299-313.
[18] 潘华璋,王德有,冯进城,等.河南西峡盆地含恐龙蛋地层中的腹足类[J].古生物学报,2007,46(3):293-298.
[19] 曹美珍,王德有.河南西峡盆地晚白垩世含恐龙蛋地层中的介形类[J].微体古生物学报,2011,28(1):98-105.
[20] 中国地质调查局地层古生物研究中心:汪啸风,陈孝红.中国各地质时代地层划分与对比[M].北京:地质出版社,2005:435-486.
[21] 潘泽成,徐莉,席运宏,等.河南省地层古生物研究,第五分册中生代[M].郑州:黄河水利出版社,2008:66-114.
[22] 张兴辽,席运宏,李进化,等.河南省古生物地质遗迹资源[M].北京:地质出版社,2011:335-347.
[23] 徐莉,潘泽成,王志宏,等.河南省汝阳盆地白垩系的发现及意义[J].地质论评,2012,58(4):601-613.
[24] 樊隽轩,彭善池,侯旭东,等.国际地层委员会官网与《国际年代地层表》(2015/01版)[J].地层学杂志,2015,39(2):125-134.
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