百色盆地渐新世古植被与古气候

韦一; 杨兵; 邓会娟

doi:10.19509/j.cnki.dzkq.2021.0078

百色盆地渐新世古植被与古气候

doi: 10.19509/j.cnki.dzkq.2021.0078

韦一^1,,
杨兵²,
邓会娟^2, ,

1.
华北科技学院安全工程学院, 河北廊坊 065201
2.
自然资源实物地质资料中心, 河北廊坊 065201

基金项目:

国家自然科学基金项目 41702366

中央高校基本科研业务费 3142018004

详细信息

作者简介:
韦一(1989—)，女，讲师，主要从事新生代微体古生物研究工作。E-mail: ostracods@126.com

通讯作者:
邓会娟(1966—)，女，高级工程师，主要从事地质矿产勘查及实物地质资料管理工作。E-mail: denghj66@163.com

中图分类号: P534.61;P532
计量
- 文章访问数: 828
- PDF下载量: 286
- 被引次数: 0
出版历程
- 收稿日期: 2021-05-12
- 网络出版日期: 2022-09-07

Paleovegetation and paleoclimate in the Baise Basin during Oligocene

Wei Yi^1
,,
Yang Bing²,
Deng Huijuan^{2
, ,}

1.
School of Safety Engineering, North China Institute of Science and Technology, Langfang Hebei 065201, China
2.
China Geological Survey Cores and Samples Centre of Natural and Resources, Langfang Hebei 065201, China

摘要

摘要:
为恢复百色盆地渐新世古植被面貌并重建古气候, 对该盆地伏平组孢粉化石进行了采样、分析、鉴定, 共获得孢粉化石34属, 并划分为2个组合: (Ⅰ) Abietineaepollenites-Quercoidites-Polypodiaceaesporites组合; (Ⅱ) Abietineaepollenites-Pinuspollenites-Pediastrum组合。组合Ⅰ时代为渐新世Rupelian中期; 组合Ⅱ时代为渐新世Rupelian晚期至Chattian早期。植被面貌变化为: 针阔混交林, 底部生长着蕨类植被→针叶林。通过孢粉组合属性特征的研究得出孢粉组合Ⅰ代表了亚热带湿润性气候, 湿度相对较大; 孢粉组合Ⅱ代表了亚热带较湿润性气候。通过共存因子分析得出: 在渐新世Rupelian中期至Chattian早期时间段内百色盆地年均降雨量(MAP)在797.5~1 293.7 mm之间, 年均温度(MAT)在11.3~22.6℃之间, 为北亚热带气候特征。而现在的百色盆地位于南亚热带(年均温度: 22.0℃, 年均降雨量: 1 070.5 mm), 二者的差异可能与新生代印度板块与亚洲板块碰撞所造成的亚洲板块"右旋"有关。
- 百色盆地 /
- 渐新世 /
- 孢粉组合 /
- 古气候 /
- 共存因子分析
Abstract:
To reconstruct the palaeovegetation and palaeoclimate in the Baise Basin during the Oligocene, in this work, we analyzed sporopollen fossils from the Fuping Formation in this region. Thirty-four genera sporopollen fossils are found and divided into two assemblages: (Ⅰ) Abietineaepollenites-Quercoidites-Polypodiaceaesporites Assemblage and (Ⅱ) Abietineaepollenites-Pinuspollenites-Pediastrum Assemblage. The age of assemblage Ⅰ and Ⅱ are mid-Rupelian to Oligocene, and late-Rupelian to early-Chattian to Oligocene, respectively. The paleovegetation changed from conifer-broad leaf forest with fern vegetation growing at the bottom to coniferous forest. Through the study of the characteristics of the palynological assemblages, assemblage Ⅰ represents a subtropical humid climate condition with relatively high humidity, while assemblage Ⅱ represents a humid climate condition in the subtropical zone. The coexistence approach of the nearest living relatives of the palynomorphs shows that during the period of the mid-Rupelian to the early Chattian of the Oligocene, the mean annual precipitation (MAP) was 797.5-1 293.7 mm, and the mean annual temperature (MAT) was 11.3-22.6℃ in the Baise Basin. The characteristics of this basin were a northern subtropical climate during the mid-Rupelian to the early Chattian. However, the present Baise Basin is located in the southern subtropics(MAT: 22.0℃, MAP: 1 070.5 mm). The difference between the Oligocene and today may be related to the "right-rotation" of the Asian Plate caused by the collision between the Cenozoic Indian Plate and the Asian Plate.
- Baise basin /
- Oligocene /
- sporopollen assemblage /
- paleoclimate /
- coexistence approach

HTML全文

图 1 研究区地质简图

1.第四系; 2.渐新统建都岭组; 3.渐新统伏平组; 4.始新统百岗组; 5.始新统那读组; 6.上白垩统罗文组; 7.中三叠统百峰组; 8.中三叠统兰木组; 9.上二叠统合山组; 10.中二叠统栖霞组-茅口组; 11.上石炭统-二叠系马平组; 12.下-上石炭统大埔组; 13.下石炭统英塘组; 14.上泥盆统融县组; 15.断层; 16.角度不整合; 17.研究剖面; 18.县镇

Figure 1. Geological sketch of the study area

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图 2 百色盆地田东剖面渐新世伏平组柱状图

Figure 2. Stratigraphic column of the Oligocene Fuping Formation at the Tiandong section in the Baise Basin

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图 3 百色盆地田东剖面渐新统伏平组部分典型孢粉

Figure 3. Major representatives of spores and pollens from the Oligocene Fuping Formation at the Tiandong section in the Baise Basin

1, 2.Polypodiaceaesporites; 3, 5.Tsugaepollenites; 4.Abietineaepollenites; 6.Pterisisporites; 7, 8.Betulaceoipollenites; 9. Quercoidites; 10.Pinuspollenites; 11.Cicatricosisporites; 12.Lonicerapollis; 13.Piceapollis; 14.Tricolpites; 15.Juglanspollenites; 16.Retitricolpites; 17.Polypodiisporites; 18.Ulmipollenites; 19.Graminidites

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图 4 百色盆地各气候期古植被面貌变迁示意图

Figure 4. Paleovegetation evolution of each climate stage during the Oligocene in the Baise Basin

1.Abietineaepollenites; 2.Pinuspollenites; 3.Piceapollis; 4.Abiespollenites; 5.Dacrydiumites; 6.Podocarpidites; 7.Tsugaepollenites; 8.Quercoidites; 9.Ulmipollenites; 10.Juglanspollenites; 11.Caryapollenites; 12.Alnipollenites; 13.Ostryoipollenites; 14.Herbs; 15.Ferns; 16.Pediastrum

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图 5 百色盆地伏平组孢粉植物类群中种子植物类群年均温度和年均降雨量共存区间

Figure 5. Coexistence interval of mean annual temperature and mean annual rainfall of seed plants in palynofloras from the Fuping Formation in the Baise Basin

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图 6 渐新世深海温度变化曲线^[1]与百色盆地气候期对比图(注：该曲线与全球温度变化趋势大体一致)

Figure 6. Comparison of deep sea temperature curves with climate stages in the Baise Basin during the Oligocene

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图 7 印度板块与亚洲板块碰撞前后古纬度图(据文献[26]修改)

Figure 7. Paleolatitude maps before and after the collision of the Indian plate and the Asian plate

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表 1 百色盆地伏平组孢粉及生态习性统计

Table 1. Ecological habits of the spores and pollens from the Fuping Formation in the Baise Basin

孢粉类型	科	属	组合Ⅰ/%		组合Ⅱ/%		气候带类型	干湿度类型
孢粉类型	科	属	NG-1	NG-3	NG-5	NG-6	气候带类型	干湿度类型
裸子植物	松科	Pinuspollenites	2.4	7.2	5.1	14.8	温带-亚热带	中生
		Abietineaepollenites	20.6	22.6	62.2	64.3	温带-亚热带	中生
		Piceapollis	0.8	1.0	3.2	5.1	温带	湿润
		Abiespollenites			1.4		温带	湿润
		Tsugaepollenites	4.0	3.6	3.2	2.3	热带-亚热带	湿润
	罗汉松科	Podocarpidites	2.4	3.1	0.5	1.3	热带-亚热带	湿润
	罗汉松科	Dacrydiumites	0.8	1.0		0.3	温带-亚热带	湿润
	杉科	Taxodiaceaepollenites			0.5		温带-亚热带	湿润
被子植物(木本)	桦科	Betulaceoipollenites			0.5		亚热带-温带	湿润
		Carpinipites			0.9		温带	中生
		Ostryoipollenites	1.6	3.1	0.5		温带	中生
		Alnipollenites	1.6	2.1			温带-亚热带	湿润
	胡桃科	Juglanspollenites	2.4	1.0	2.3	0.6	亚热带-温带	中生
		Caryapollenites	2.4	2.1	0.5	1.6	热带-亚热带	中生
		Engelhardtioidites			0.5	0.3	热带-亚热带	中生
	榆科	Ulmipollenites	0.8	0.5	1.4	0.6	温带-亚热带	中生
	槭树科	Aceripollenites				0.3	温带-亚热带	中生
	壳斗科	Quercoidites	10.3	6.2	5.5	1.0	温带-亚热带	中生
	漆树科	Rhoipites	0.8	1.5			热带-亚热带	中生
	蕈树科	Liquidambarpollenites		4.1	0.5	0.6	热带-亚热带	中生
	忍冬科	Lonicerapollis				0.3	温带-亚热带	中生
被子植物(草本)	禾本科	Graminidites			0.5		热带-亚热带	旱生
	唇形科	Labitricolpites			1.4		广温	中生
	百合科	Liliacidites				0.3	广温	中生
	科未定	Tricolpopollenites	0.8	0.5	0.5	1.6	亚热带	中生
		Retitricolpites	0.8	0.5	4.1	0.6	广温	中生
		Tricolpites			1.4	1.3	热带-亚热带	中生
蕨类植物	凤尾蕨科	Pterisisporites	7.9	7.7	1.4	0.6	热带-亚热带	湿润
	水龙骨科	Polypodiisporites	9.5	9.2	0.9	0.6	热带-亚热带	湿润
		Polypodiaceaesporites	16.7	7.7	0.9		热带-亚热带	湿润
		Monolites	11.9	12.8	0.5	0.3	热带-亚热带	湿润
		Polypodiaceoisporites		2.6			热带-亚热带	湿润
	海金砂科	Lygodiumsporites	0.8				热带-亚热带	湿润
	海金砂科	Cicatricosisporites				0.3	热带-亚热带	湿润
	科未定	Deltoidospora	0.8			0.6	热带-亚热带	湿润
藻类	水网藻科	Pediastrum			708(粒)	142(粒)

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表 2 百色盆地伏平组孢粉植物群和其现存最近亲缘类群以及其参数

Table 2. Palynofloras from the Fuping Formation in the Baise Basin and their nearest living relatives and their climatic amplitudes

孢粉类型	现存最近亲缘类群	年均温度/℃		年均降雨量/mm
孢粉类型	现存最近亲缘类群	最小值	最大值	最小值	最大值
裸子植物
Pinuspollenites	Pinus^[17]	-5.2	24.7	170.5	2 822.7
Abietineaepollenites	Abies^[18]	2.8	23.0	170.5	1 785.2
Piceapollis	Picea^[17]	-4.9	22.7	291.6	1 815.6
Tsugaepollenites	Tsuga^[19]	-0.4	23.8	279.4	2 394.5
Podocarpidites	Podocarpus^[17]	8.5	24.7	797.5	1 653.5
Taxodiaceaepollenites	Taxodiaceae^[19]	5.7	24.7	459.5	2 447.1
被子植物
Betulaceoipollenites	Betula^[19]	-4.9	23.2	291.6	1 815.6
Carpinipites	Carpinus^[18]	2.3	25.5	570.3	1 785.2
Ostryoipollenites	Betulaceae^[18]	-4.9	23.2	291.6	1 815.6
Alnipollenites	Alnus^[19]	-5.2	23.8	355.2	2 394.5
Juglanspollenites	Juglans^[19]	-1.6	23.0	257.5	2 074.4
Caryapollenites	Carya^[19]	11.3	22.6	601.1	1 942.5
Engelhardtioidites	Juglandaceae^[19]	-1.6	24.7	257.5	1 653.5
Ulmipollenites	Ulmus^[19]	-5.2	25.5	16.4	1 900.3
Aceripollenites	Acer^[19]	-1.1	24.0	115.0	2 559.0
Quercoidites	Quercus^[19]	-5.2	25.5	209.1	1 900.3
Rhoipites	Rhus^[19]	-0.4	23.8	277.6	2 394.4
Liquidambarpollenites	Liquidambar^[20]	8.5	23.2	474.6	1 942.5
Lonicerapollis	Caprifoliaceae^[18]	-4.1	25.5	303.9	1 869.9
Graminidites	Gramineae^[18]	-4.9	25.5	303.9	2 447.1
Labitricolpites	Labiatae^[18]	-4.9	24.7	16.4	1 942.5
Tricolpites	Hamamelidaceae^[18]	8.5	25.5	531.0	1 293.7

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