塔里木盆地腹地玛扎塔格地区新近纪砂岩组分和重矿物组合特征及物源分析

李钦; 刘健

塔里木盆地腹地玛扎塔格地区新近纪砂岩组分和重矿物组合特征及物源分析

李钦,
刘健^,

中国地质科学院地质力学研究所, 北京 100081

基金项目:

特殊地质地貌区填图试点项目 DD20160060

塔里木盆地气候变化湖相沉积记录调查项目 12120113006200

详细信息

作者简介:
李钦(1991-), 男, 硕士研究生, 研究方向为盆地分析。E-mail:qinjelly555@126.com

通讯作者:
刘健(1970-), 男, 教授级高工, 主要从事构造地质学、沉积学等方面研究工作。E-mail:jianliu686@163.com

中图分类号: P512.2
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- 被引次数: 0
出版历程
- 收稿日期: 2016-08-11
- 刊出日期: 2017-04-01

ANALYSIS OF DETRITAL COMPOSITION, HEAVY MINERAL COMBINATION CHARATERISTICS AND SAND PROVENANCE OF NEOGENE SANDSTONES, MAZHATAGE MOUNTAIN IN THE CENTRE OF TARIM BASIN

LI Qin,
LIU Jian^,

Institute of Geomechanics, Chinese Academy of Geological Sciences, Beijing 100081, China

摘要

摘要: 发育于塔里木盆地腹地——玛扎塔格地区的新近纪沉积地层出露良好，保存了其物源区造山带的隆升剥蚀信息。利用古水流、砂岩碎屑组构和重矿物组合特征等研究方法，结合研究区的区域构造演化，探讨玛扎塔格地区晚新生代以来古地貌格局及沉积物源区隆升剥蚀的沉积响应关系。结果表明该研究区的古地貌总体格局为西高东低，沉积物源在上新世早期之前主要来自于西昆仑造山带和帕米尔造山带，而到了上新世以来其沉积物源主要来自于帕米尔造山带，并且在上新世早期，物源区发生明显的构造隆升运动，更新世期间物源区出现快速隆升剥蚀构造事件。
- 玛扎塔格 /
- 新近纪 /
- 古地貌 /
- 帕米尔高原 /
- 隆升剥蚀 /
- 青藏高原 /
- 西昆仑山脉
Abstract: Developed in the hinterland of the tarim basin, Neogene sedimentary stratain the centre of Tarim basin are well-outcropped and hold the information about the uplift and denudation of provenance orogenic belt.Using the methods of paleocurrent, sandstone detrital component and heavy mineral assemblages characteristics, combing with regional tectonic evolution of the study area, the sedimentary response relationship between the paleogeomorphology pattern and the uplifting and denudation of the sediment source area is discussed in Mazhatage Mountain. Results show that the overall pattern of the ancient landform in the study area is high in the west and low in the east, the sediment source of the study area before the early Pliocene mainly comes from the West Kunlun orogenic belt and Pamirsorogenic belt, while since the beginning of Pliocene epoch the sediment source mainly comes from Pamirs orogenic belt, and in the early Pliocenethere was an obvious structural uplift movement in the source area, and a rapid rise and denudation tectonic event occurred during the pleistocene period
- Mazhatage Mountain /
- Neogene /
- ancient landform /
- Pamirs /
- uplift and denudation /
- Tibet Plateau /
- West Kunlun Mountains

HTML全文

图 1 玛扎塔格地区及其物源区地质图^[7~8]

Figure 1. A geological map of Mazhatage and its provenance

下载: 全尺寸图片幻灯片

图 2 玛扎塔格剖面地层分布特征

图a中遥感影像中黑线的位置表示为剖面所在位置(剖面起点坐标位置为N 80°19′14.17″，E 38°42′04.75″：终点坐标位置为N 80°18′15.14″，E 38°40′51.61″)；图b为测量地质剖面图

Figure 2. Distributing characteristics of strata profile in Mazhatage

下载: 全尺寸图片幻灯片

图 3 野外考察照片

a—喀什群地层中的牡蛎化石b—乌恰群地层中发育的板状斜层理c—乌恰群—阿图什组界线d—阿图什组地层中发育的砂砾岩e—西域组地层中发育的水平层理f—西域组顶部地层中的硅化木化石

Figure 3. Pictures of field investigation

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图 4 沉积地层、砂岩碎屑组分和重矿物组合特征(年龄数据来自文献[2]

Figure 4. Sedimentary strata、sandstone detrital component and heavy mineral combination characteristics

下载: 全尺寸图片幻灯片

表 1 玛扎塔格剖面重矿物组合特征

Table 1. Heavy mineral combination characteristics of Mazartagh section

碎屑重矿物组合	物源岩石类型
石榴石、绿帘石	高级变质岩
辉石、角闪石、金红石	基性火山岩
角闪石、辉石、锆石、绿帘石	中性火山岩
角闪石、磷灰石、锆石	酸性火山岩
锆石、金红石、石榴石	沉积岩

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