西藏札达地区深部构造演化及动力学解译

陈家其; CHEN Jiaqi; 郭游; GUO You; 旦增; DAN Zeng; 闵鑫; MIN Xin; 袁亮; YUAN Liang; 罗江波; LUO Jiangbo; 张慧山; ZHANG Huishan; 赵永鑫; ZHAO Yongxin; 黄云川; HUANG Yunchuan

doi:10.48014/cesr.20240601001

西藏札达地区深部构造演化及动力学解译

Evolution and Dynamic Interpretation of Deep Structure in Zanda County,Xizang Autonomous Region

中国地球科学评论 2024年第3卷第3期页码[132-145] 下载全文[2.1MB] [HTML]

摘要

随着地球科学领域研究的不断深入, 西藏札达地区域构造环境及其演化特征已成为地质学者研究的热点。本研究基于对札达盆地深部结构和地表地质特征的精准测绘, 在多学科交叉的基础上, 探究了札达地区的域构造环境及其地质演化过程。通过采集岩石圈剖面的岩石样本和构造变形记录, 结合地球化学分析与年代学测定, 分析了区域内主要地质单元的形成年代及其构造活动历史。本研究揭示了札达地区受印度板块北移与亚洲板块碰撞影响下的构造变形特征, 精确恢复了该地区早中新世以来的地壳演化历程。地球物理探测结果表明札达盆地深部存在显著的低速异常区域, 推测与盆地深部熔融物质的侵入及地壳物质的流动有关。研究还发现, 札达地区的沉积层序与区域构造活动密切相关, 反映了不同演化阶段的地表抬升、侵蚀与沉积过程。域构造重建模型的建立, 不仅为理解青藏高原西南缘构造演化提供了新的证据, 而且对预测区域内可能的矿产资源分布及其开发具有重要意义。通过在区域地质背景下的构造分析, 认识到西藏札达地区具有多期构造活动叠加的复杂特点, 为进一步探究高原内部的动力学过程与地球深部物质循环提供了新的视角。研究采集了超过500个岩石样本, 进行了100余次的地质剖面测量, 利用精密的同位素地质年代学方法, 对所采样本进行了全面的分析, 确立了一系列关键的地质时标, 精确勾勒了札达区域内在时空尺度上的构造演化图景。研究成果不仅丰富了对此区域地质历史的认识, 同时也为地球内部物质和能量交换机制的研究提供了宝贵的资料。

Abstract

As the research in Earth Sciences continues to deepen, the tectonic environment and its evolutionary characteristics of the Zanda region in Tibet have become a hot topic for geologists. This study, based on the precise mapping of the deep structure of the Zanda Basin and the surface geological features, explores the tectonic setting and geological evolution processes of the Zanda area based on interdisciplinary crossreference. By collecting rock samples from the lithosphere profile and records of tectonic deformation, and integrating geochemical analysis and chronology, the study has analyzed the formation ages of the main geological units in the region and their tectonic activity history. It reveals the tectonic deformation features of the Zanda area under the influence of the northward movement of the Indian Plate and the collision with the Asian Plate and accurately reconstructs the area's geological evolution process since the Eocene. Geophysical survey results indicate a significant low-velocity anomaly in the deep part of the Zanda Basin, speculated to be related to the intrusion of molten materials in the deep basin and the flow of crustal materials. The study also finds that the sedimentary sequences in the Zanda area are intimately linked to regional tectonic activities, reflecting land uplift, erosion, and sedimentation processes at different evolutionary stages. The establishment of a tectonic reconstruction model not only provides new insights into understanding the structural evolution of the southwestern edge of the Qinghai-Xizang Plateau but also has significant implications for predicting the distribution and development of potential mineral resources in the region. Through structural analysis under the context of regional geology, it is recognized that the Zanda area in Xizang exhibits the complex characteristics of multiple phases of tectonic activity overlaid, providing a new perspective for further exploring the dynamics processes within the plateau and the deep Earth material cycle. The research has collected over 500 rock samples and conducted more than 100 geological profile measurements, using precise isotopic geochronology methods to comprehensively analyze the collected samples, establishing a series of key geological time markers, and accurately delineating the tectonic evolutionary landscape of the Zanda area on a spatiotemporal scale. The research results not only enrich the understanding of the geological history of this region but also provide valuable data for studies on the inner Earth material and energy exchange mechanisms.

DOI

10.48014/cesr.20240601001

文章类型

综述

收稿日期

2024-06-01

接收日期

2024-06-14

出版日期

2024-09-28

关键词

西藏札达, 域构造环境, 地质演化, 地球化学分析, 构造重建模型

Keywords

Zanda, tectonic setting, geological evolution, geochemical analysis, tectonic reconstruction model

作者

陈家其, 郭游^1,2,*, 旦增¹, 闵鑫¹, 袁亮^1,2, 罗江波¹, 张慧山¹, 赵永鑫¹, 黄云川¹

Author

CHEN Jiaqi, GUO You^1,2,*, DAN Zeng¹, MIN Xin¹, YUAN Liang^1,2, LUO Jiangbo¹, ZHANG Huishan¹, ZHAO Yongxin¹, HUANG Yunchuan¹

所在单位

1. 中国地质调查局军民融合地质调查中心, 成都 610063
2. 大数据与决策实验室, 长沙 410073

Company

1. China Geological Survey Military-Civilian Integration Geological Survey Center, Chengdu 610036, China
2. Laboratory for Big Data and Decision, Changsha 410073, China

浏览量

294

下载量

130

参考文献

[1] 汪洋, 张开均. 青藏高原新生代构造研究最新进展和构造发展的阶段性[J]. 南京大学学报: 自然科学版, 2006, 42(2): 199-219.
[2] 王琳霖, 等. 柴达木盆地西部构造演化与差异变形特征及对油田水分布的控制[J]. 石油实验地质, 2020, 42(2): 186-192.
[3] 吴晓智, 等. 准噶尔盆地北三台凸起构造演化与油气成藏[J]. 地质科学, 2012, 47(3): 653-668.
[4] 葛肖虹, 等. 青藏高原隆升对中国构造-地貌形成,气候环境变迁与古人类迁徙的影响[J]. 中国地质, 2014, 41(3): 698-714.
[5] 申晓辉, 胡明. 江爱达日那地区构造演化与构造单元划分[J]. 化工设计通讯, 2022, 48(3): 3-7.
https://doi.org/10.3969/j.issn.1003-6490.2022.03.010
[6] 刘德民, 杨巍然, 郭铁鹰. 藏南地区新生代多阶段构造演化及其动力学的探讨[J]. 地学前缘, 2020, 27(1): 194-203.
https://doi.org/10.13745/j.esf.sf.2019.11.29
[7] 西藏洛扎-拉康一带断裂构造特征及演化浅析[D]. 成都: 成都理工大学, 2020.
[8] 肖永春, 马超, 于琪, 等. 西藏色哇地区中新生代构造演化史讨论[J]. 吉林地质, 2020, 39(4): 9-16.
https://doi.org/10.3969/j.issn.1001-2427.2020.04.008
[9] 孟轲荆, 何旭, 邹林, 等. 西藏那曲地区遥感构造分区及找矿前景研究[J]. 矿产勘查, 2020, 11(9): 9-17.
https://doi.org/10.3969/j.issn.1674-7801.2020.09.027
[10] 刘创脱. 藏南地区构造演变对成矿的限制———以扎西康矿集区为例[J]. 中国钼业, 2019, 41(5): 19-22.
https://doi.org/10.13384/j.cnki.cmi.1006-2602.2019.05.004
[11] 张金明, 王秉璋, 付彦文, 等. 柴达木盆地及其南北缘前南华纪构造单元划分及地质演化[J]. 现代地质, 2022, 36(2): 16-28.
https://doi.org/10.19657/j.geoscience.1000-8527.2022.040
[12] 王明. 羌塘盆地东部达卓玛区域构造演化与隆升历史分析[D]. 北京: 中国地质大学(北京), 2019.
[13] 唐宇, 王根厚, 冯翼鹏. 西藏南冈底斯叶巴火山弧的构造—地层属性及其演化[J]. 地学前缘, 2021, 28(2): 19-32.
[14] 刘峰, 周峰, 刘强. 藏南仲巴地体中段构造变形特征及构造演化分析[J]. 大地构造与成矿学, 2019, 43(3): 859-871.
https://doi.org/10.16539/j.ddgzyckx.2019.03.015
[15] 王猛, 杨永恒, 王晔桐. 青海柴达木盆地北缘构造带九龙山地区侏罗系储层特征[J]. 沉积与特提斯地质, 2019, 39(2): 94-102.
https://doi.org/10.3969/j.issn.1009-3850.2019.02.011

引用本文

陈家其, 郭游, 旦增, 等. 西藏札达地区深部构造演化及动力学解译[J]. 中国地球科学评论, 2024, 3(3): 132-145.

Citation

CHEN Jiaqi, Guo You, DAN Zeng, et al. Evolution and dynamic interpretation of deep structure in Zanda County, Xizang Autonomous Region[J]. Chinese Earth Sciences Review, 2024, 3(3): 132-145.