中国地质大学（武汉）：《地史学》课程电子教案（PPT教学课件）第二章 沉积古地理学 Sedimentary paleogeography 2.2 相标志 Sed. facies indicators

Chapter 2 Sedimentary paleogeography-3 沉积古地理学-3 2.1 concepts and laws 概念和定律 2.2 sedimentary-facies indicators 相标志 2.3 sedimentary environments 沉积环境(自主互动)

Chapter 2 Sedimentary paleogeography-3 沉积古地理学-3 2.1 concepts and laws 概念和定律 2.2 sedimentary-facies indicators 相标志 2.3 sedimentary environments 沉积环境 (自主互动)

2.2 Sed facies indicators 相标志 22.1 biologic indicates,/生物标志 22.2 physic indicators物理标志 223 chemic indicators/化学标志 224 integrated indicators/综合标志

2.2 Sed. facies indicators 相标志 2.2.1 biologic indicates/生物标志 2.2.2 physic indicators/物理标志 2.2.3 chemic indicators/化学标志 2.2.4 integrated indicators/综合标志

2.2.2 physic indicators ○ lithology ○ structures on bedding surface ○ bedding structures ○soft- sediment deformations

2.2.2 physic indicators ●lithology ●structures on bedding surface ●bedding structures ●soft-sediment deformations Physic sed. structures

Lithology Color: originated and weathered Composition: terrigenous, intra-basinal volcanic and mIxing Texture: grain size, sorting, roundness, sphericity, micromorphology, matrix

Lithology Color: originated and weathered Composition: terrigenous, intra-basinal, volcanic and mixing Texture：grain size, sorting, roundness, sphericity, micromorphology, matrix

Color: originated weathered Originated Inherited dependent on color of clastics. e.g. quartz sandstone-white or gray white; feldspar sandstone-reddish Autogenous: originated from minerals and pigments which are formed in the course of syndeposition and diagenesis. e.g. glauconitic sandstone-green. Originated colors possess stable and wide distribution in space, and parallels to original bed boundaries

Color: originated & weathered Originated: Inherited ：dependent on color of clastics. e.g. quartz sandstone-white or gray white; feldspar sandstone-reddish . Autogenous: originated from minerals and pigments which are formed in the course of syndeposition and diagenesis. e. g. glauconitic sandstone-green. Originated colors possess stable and wide distribution in space, and parallels to original bed boundaries

Color weathered Weathered: originated from minerals and pigments which are formed in the course of weathering. When bivalent irons are oxygenated to trivalent irons(Fe2+-Fe3+) in the rocks the green will change into the red or brown in the rock weathered color often crosscuts stratifications distributes along joints, cranny and fault belts, and shows spots, massive or unstable distribution in space

Color: weathered Weathered: originated from minerals and pigments which are formed in the course of weathering. When bivalent irons are oxygenated to trivalent irons (Fe2+→Fe3+) in the rocks, the green will change into the red or brown in the rock. weathered color often crosscuts stratifications, distributes along joints, cranny and fault belts, and shows spots, massive or unstable distribution in space

“ three-god” Conglomerate(周口店,c2) merited .Oxidized chloe

“three-good” Conglomerate （周口店，C2） inherited Oxidized haloes

Originated colors,T2y济源 见%专 淘成 奶 林防

Originated colors, T2y, 济源

Original color. green Volcanic ashes hydrolyze into chlorite 火山灰水解成绿 泥石 Tuffaceous tempestite D1,北塔山,新疆

Original color: green Volcanic ashes hydrolyze into chlorite 火山灰水解 成绿 泥石 Tuffaceous tempestite， D1， 北塔山，新疆

three-good” Conglomerate(周口店,c2) 产多感 High maturity conglomerates: Good sorting, roundness and cementation

“three-good” Conglomerate （周口店，C2） High maturity conglomerates: Good sorting, roundness and cementation