秦祁昆接合部二叠纪沉积建造时空分布

寇晓虎; 张克信; 林启祥; 朱云海; 陈奋宁; 罗根明; 徐亚东

秦祁昆接合部二叠纪沉积建造时空分布

寇晓虎^{1, 2,},
张克信^{1, 2},
林启祥²,
朱云海^{1, 2},
陈奋宁^{1, 2},
罗根明^{1, 2},
徐亚东^{1, 2}

1.
中国地质大学地质过程与矿产资源国家重点实验室和教育部生物与环境地质重点实验室, 湖北武汉 430074
2.
中国地质大学资源学院, 湖北武汉 430074

基金项目:

高等学校全国优秀博士学位论文作者专项资金项目 200228

中国地质调查局1∶25万区域地质调查项目 200413000007

中国地质调查局1∶25万区域地质调查项目 1212010610316

详细信息

作者简介:
寇晓虎(1980 -), 男, 博士研究生, 主要从事造山带地层及沉积学研究. E-mail: kxhemail@sohu.com

中图分类号: P542
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出版历程
- 收稿日期: 2007-06-16
- 刊出日期: 2007-09-25

The Distribution of Permian Sedimentary Sequences in the Adjacent Area of Qinling-Qilian-Kunlun

KOU Xiao-hu^{1, 2
,},
ZHANG Ke-xin^{1, 2},
LIN Qi-xiang²,
ZHU Yun-hai^{1, 2},
CHEN Fen-ning^{1, 2},
LUO Gen-ming^{1, 2},
XU Ya-dong^{1, 2}

1.
GPMR an d BGEG Labora tories, China University of Geosciences, Wuhan 430074, China
2.
Faculty of Earth Sciences, China University of Geosciences, Wuhan 430074, China

摘要

摘要: 研究区位于秦祁昆结合部及邻区.二叠纪时, 研究区以南祁连构造地层带为界, 呈现北陆南海对峙格局: 北部的中祁连、北祁连和阿拉善主要为一套砾岩、砂岩和泥岩为主的河湖相沉积; 南祁连为海陆交互相碎屑岩、灰岩沉积; 南部西秦岭和东昆仑主要是以半深海-深海浊积岩、玄武岩和海山碳酸岩盐为主的多岛洋沉积.本次1∶25万临夏市幅和定西市幅地质填图中, 笔者在西秦岭与南祁连结合部位的甘肃夏河县甘加一带, 发现一套早-中二叠世小洋盆玄武岩和碳酸盐岩海山建造, 与秦昆结合部布青山-花石峡-兴海一带的早-中二叠世多岛洋沉积建造可以对比.晚二叠世, 北部的秦祁结合部仍为半深海-深海浊积岩沉积, 而南部秦昆结合部则转换为前陆-磨拉石沉积建造.
- 秦祁昆 /
- 二叠纪 /
- 沉积建造 /
- 多岛洋
Abstract: The study area is located in the copulae of Qinling-Qilian-Kunlun and adjacent area. In Permian, with the borderline of tectonic-stratigraphic belt in South Qilian, the south is marine facies sediment environment and the north is continental facies sediment environment: In the middle Qilian, North Qilian and Alashan of north district, the sediment is conglomerate, sandstone and mudstone, and it belong to fluvial and lacustrine facies sediment environment; In the south Qilian of mid-district, the sediment environment is belong to marine continental alternation facies with clastic rocks and limestone; In the West Qinling and East Kunlun of the south district, the sediment environment is archipelagic ocean including turbidite rocks of bathyal facies and abyssal facies, basalt, seamount carbonate and so on. During the geological mapping of 1∶250 000 Linxia city and Dingxi City, we found small ocean basin and carbonate seamount formation of early and middle Permian between West Qinling in Ganjia, Xiahe County, Gansu Province. And this can contrast with the archipelagic ocean sediment formation between Qinling and Kunlun in the area of Buqingshan-Huashixia-Xinghai. In late Permian, the sediment is still turbidite rocks of half-sea and deep-sea between Qinling and Qilian, but it is foreland-molasses sediment formation between Qinling and Kunlun.
- Qinling-Qilian-Kunlun /
- Permian /
- Sedimentary formation /
- Archipelagic Ocean.

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图 1 研究区二叠纪构造- 地层分区与二叠系剖面分布图

Ⅰ.阿拉善分区; Ⅱ.北祁连分区; Ⅲ.中祁连分区; Ⅳ.南祁连分区; Ⅴ.西秦岭分区; Ⅵ.柴达木分区; Ⅶ.东昆仑分区; Ⅷ.阿尼玛卿分区; Ⅸ.巴颜喀拉分区.图中的1, 2, 3……, 等二叠纪地层剖面编号对应的剖面名称和岩石地层单位详见表 1

Fig. 1. T ectonic-str atig raphic a nd stratig r aphic sections distributio n of Permian in study area

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图 2 研究区各构造-地层分区二叠纪岩石地层序列及其对比

Fig. 2. Litho-strata series and contrast of Permian in study area

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图 3 青海同仁县羊子沟-隆务峡二叠系大关山组-石关组实测剖面柱状图

Fig. 3. Column of Daguanshan and Shiguan formation of Permian in Longwu gorge, Tongren County, Qinghai Province

下载: 全尺寸图片幻灯片

图 4 甘肃夏河县甘加二叠纪碳酸盐岩海山建造实测剖面柱状图

Fig. 4. Column of carbonate Seamount of Permian in Ganjia, Xiahe County, Gansu Province

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图 5 中祁连-北祁连-阿拉善二叠纪陆相沉积建造横向对比图

T_1-2x.西大沟组; P₃y.窑沟组; Pt₁T.托赖岩群; P_1-2dh.大黄沟组; P₃h.红泉组; Cy.羊虎沟组; T_1-2w.五佛寺组; Pt₃γ.晚元古代花岗岩; L.湖相; FL.河流相; AF.冲积扇相; 1.砾岩; 2.复成分砾岩; 3.长石石英砂岩; 4.长石砂岩; 5.石英砂岩; 6.泥质粉砂岩; 7.粉砂岩; 8.泥岩; 9.角砾岩; 10.糜棱岩; 11.千枚岩; 12.礁灰岩; 13.生屑灰岩; 14.鲕粒灰岩; 15.泥晶灰岩; 16.含燧石灰岩; 17.藻灰岩; 18.白云岩; 19.大理岩; 20.钙质板岩; 21.炭质板岩; 22.板岩; 23.玄武岩

Fig. 5. column of Permian sedimentary formation from mid-Qilian to North Qilian and Alashan district

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图 6 东昆仑-西秦岭结合部早-中二叠世多岛洋沉积建造剖面横向展布图

图例同图 5

Fig. 6. Column of Archipelagic Ocean Sedimentary formation in Permian between East Kunlun and West Qinling

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表 1 研究区二叠纪地层剖面分布

Table 1. Sectio n distribution of P ermian stra ta in study area

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