现代地质2024，Vol.38Issue(4)：853-864,12.DOI:10.19657/j.geoscience.1000-8527.2024.082
新华夏构造体系地块的多层次"构造隆起-拆离凹陷"特征:大兴安岭造山带例析
Multi-order Characteristics of the"Tectonic Uplift-Detachment Depression"in Blocks of the Neocathaysian Tectonic System:A Study of the Greater Khinganling Orogenic Belt
摘要
Abstract
Block morphology can be divided into two categories:tectonic belt and tectonic block.The"tectonic belt"refers to an extension belt within a block characterized by strong rock deformation and complex geological processes,and often manifests itself as an uplift orogenic belt.The regions with weak rock deformation,prima-rily characterized by sedimentary processes and similar length and width,are termed tectonic blocks.Most of them are depression basins controlled by detachment structures.In the tectonic system,the block feature of"uplift and detachment"holds universal significance.This paper reveals the hierarchical characteristics of block distribution.Tectonic blocks at a certain level may be considered tectonic belts on a larger scale or at a higher level.Conversely,on a smaller scale or at a lower level,they may be represented as a combination of lower-level tectonic belts and tectonic blocks.Taking the Greater Khinganling orogenic belt as an example,this paper describes a five-order"uplift and disassembly depression"tectonic features of blocks.The first order of the Neocathaysian tectonic system is the Eastern Asian tectonic assemblage,characterized by an anticlockwise compressional shear dynamic relationship between the oceanic and continental plates.In the Neocathaysian tec-tonic system of Eastern China,the NNE-trending giant uplift tectonic belt and the giant detachment sedimentary basin belt represent the second order.The Greater Khinganling orogenic belt is the third-order structure,with alternating uplifted tectonic belts and subsidence depression belts.The southern section of the Greater Khingan-ling Mountains,known as the"magmatic core complex uplift-detachment basin depression belt"in the Chifeng area,belongs to the fourth order of the Neocathaysian tectonic system.At the fifth order,the"Mesozoic gran-ite-complex core uplift belt-volcanic depression belt"in the Chaihulanzi gold field is crucial for orefield prospec-ting.The characteristics of the five-order"tectonic uplift-detachment depression belts"within the Neocathay-sian tectonic system can guide the determination of metallogenic regionalization units,as well as the study of metallogenic patterns and prospecting work.In particular,the distribution of blocks within the orefield,part of the fifth order tectonic system,has fundamental and guiding significance for achieving breakthrough in ore pros-pecting within the key mining belt.关键词
新华夏构造体系/构造隆起-拆离凹陷分布/地块层次Key words
Neocathaysian tectonic system/distribution of tectonic uplift-detachment depression/block hierarchy分类
天文与地球科学引用本文复制引用
吕古贤,张宝林,焦建刚,王翠芝,毕珉烽,付旭,吕承训,马立成..新华夏构造体系地块的多层次"构造隆起-拆离凹陷"特征:大兴安岭造山带例析[J].现代地质,2024,38(4):853-864,12.基金项目
内蒙古自治区地质勘查基金管理中心地质勘查项目(2019-KY02) （2019-KY02）
国家计委科技找矿项目(JG947110) （JG947110）
国家科委攀登计划项目(G1999043214,95-39(预)-6-3) （G1999043214,95-39(预）
国家科委基础研究司特别支持项目(GJ94-83) （GJ94-83）
国家自然科学基金项目(40972061). （40972061）
