中非喀麦隆西部Bangangté地区火山岩的岩石学、地球化学及岩石成因研究
发布时间：2021-11-16 18:47
Bangangté地区玄武质熔岩,位于喀麦隆火山岩带中部的西喀麦隆高地（Bambouto,Bamenda and Oku山）的Bameleke高原内。研究区地理范围为东经10°19’00"-10°49’00",北纬 4°00’00"-5°35’00",平均海拔1400m。其北部为Bambouto山,Bamenda山和Oku 山,西南部为Manengouba 山,西部为Bana和Mbo平原。本文运用代表性样品的新的主量元素、微量元素和稀土元素地球化学以及地质年代学数据区分了 Bangangté地区的两个岩浆系列:碱性系列和过渡性系列。碱性系列在露头上主要包括火山岩和碧玄岩、玄武岩、夏威夷岩及橄榄粗安岩,而亚碱性系列（或过渡性系列）在露头上分布有限,只由玄武岩组成。这些碱性和过渡性系列的熔岩侵位于新生代（36.67-8.89 Ma）,分为明显的两期火山活动:第一期发生于约37 Ma,为玄武岩侵位,代表了过渡性系列;第二期发生于约15-9 Ma,为碧玄岩、玄武岩、夏威夷岩及橄榄粗安岩侵位,代表了碱性系列。主量元素和微量元素组成表明,这些熔岩从基性岩石演化为分异程度较高的岩石,期间发生了橄榄石...
【文章来源】：中国地质大学(北京)北京市 211工程院校 教育部直属院校
【文章页数】：122 页
【学位级别】：博士
【文章目录】：
摘要
Abstract
Chapter 1 Introduction
1.1 Research status and scientific problems
1.1.1 Tertiary to recent magmatism in Cameroon
1.1.2 Research development about the basaltic lavas
1.1.3 Scientific problems
1.2 Geological interest of the volcanic rocks from the Bangangté area
1.3 Location and geographical settings
1.4 Aims of the study
1.5 Outline of the dissertation
Chapter 2 Regional geology
2.1 Introduction
2.2 Crystalline basement of Cameroon
2.3 Crystalline basement of the West Cameroon Highlands
2.4 Volcanic formations
2.5 Cameroon Volcanic Line (CVL)
2.5.1 Overview
2.5.2 Geology,petrology,geochronology and structural geology of the CVL
2.5.3 Oceanic segment
2.5.4 Continental segment
Chapter 3 Working conditions and methods
3.1 Field works
3.2 Laboratory works
3.2.1 X-ray fluorescence (XRF)
3.2.2 Inductively coupled plasma mass spectrometry (ICP-MS)
3.2.3 Sr-Nd-Pb isotopes analysis
3.2.4 K-Ar analytical method
Chapter 4 Petrolology, geochemistry and geochronology of lava from Bangangté area
4.1 Introduction
4.2 Petrography
4.2.1 Petrographic descriptions of volcanic rocks in the Bangangté area
4.2.2 Nomenclature of volcanic rocks in the Bangangté area
4.2.3 Outcrops and macroscopic observations of volcanic rocks in theBangangté area
4.2.4 Microscopic observations of volcanic rocks in the Bangangté area
4.3 Geochronology
4.4 Whole-rock geochemistry of mafic lavas from the Bangangté area
4.4.1 Chemical alteration
4.4.2 Major elements
4.4.3 Trace elements
4.4.4 Sr-Nd-Pb isotopes
4.5 Conclusion
Chapter 5 Petrogenesis of alkaline and transitional lava of the Bangangté area
5.1 Introduction
5.2 Major elements
5.3 Trace elements
5.4 Discriminant diagrams
5.5 Origin of the transitional lavas
5.5.1 Origin of quartz-normative basalts
5.5.2 Origin of plagioclase-basalts
5.6 Geochemical process
5.6.1 Fractional crystallization
5.6.2 Interaction with continental crust
5.7 Source characteristics
5.8 Partial melting
5.9 Geotectonic context of volcanism of the Bangangté area
5.10 Geodynamic implications
Chapter 6 General conclusions
6.1 conclusions
6.2 Research innovative findings
References
APPENDICE1
ACKNOWLEDGEMENT
PUBLICATIONS
CURRICULUM VITAE
【参考文献】：
期刊论文
[1]A comparative review of petrogenetic processes beneath the Cameroon Volcanic Line: Geochemical constraints[J]. Asobo N.E.Asaah,Tetsuya Yokoyama,Festus T.Aka,Tomohiro Usui,Mengnjo J.Wirmvem,Boris Chako Tchamabe,Takeshi Ohba,Gregory Tanyileke,J.V.Hell. Geoscience Frontiers. 2015(04)
本文编号：3499380
【文章来源】：中国地质大学(北京)北京市 211工程院校 教育部直属院校
【文章页数】：122 页
【学位级别】：博士
【文章目录】：
摘要
Abstract
Chapter 1 Introduction
1.1 Research status and scientific problems
1.1.1 Tertiary to recent magmatism in Cameroon
1.1.2 Research development about the basaltic lavas
1.1.3 Scientific problems
1.2 Geological interest of the volcanic rocks from the Bangangté area
1.3 Location and geographical settings
1.4 Aims of the study
1.5 Outline of the dissertation
Chapter 2 Regional geology
2.1 Introduction
2.2 Crystalline basement of Cameroon
2.3 Crystalline basement of the West Cameroon Highlands
2.4 Volcanic formations
2.5 Cameroon Volcanic Line (CVL)
2.5.1 Overview
2.5.2 Geology,petrology,geochronology and structural geology of the CVL
2.5.3 Oceanic segment
2.5.4 Continental segment
Chapter 3 Working conditions and methods
3.1 Field works
3.2 Laboratory works
3.2.1 X-ray fluorescence (XRF)
3.2.2 Inductively coupled plasma mass spectrometry (ICP-MS)
3.2.3 Sr-Nd-Pb isotopes analysis
3.2.4 K-Ar analytical method
Chapter 4 Petrolology, geochemistry and geochronology of lava from Bangangté area
4.1 Introduction
4.2 Petrography
4.2.1 Petrographic descriptions of volcanic rocks in the Bangangté area
4.2.2 Nomenclature of volcanic rocks in the Bangangté area
4.2.3 Outcrops and macroscopic observations of volcanic rocks in theBangangté area
4.2.4 Microscopic observations of volcanic rocks in the Bangangté area
4.3 Geochronology
4.4 Whole-rock geochemistry of mafic lavas from the Bangangté area
4.4.1 Chemical alteration
4.4.2 Major elements
4.4.3 Trace elements
4.4.4 Sr-Nd-Pb isotopes
4.5 Conclusion
Chapter 5 Petrogenesis of alkaline and transitional lava of the Bangangté area
5.1 Introduction
5.2 Major elements
5.3 Trace elements
5.4 Discriminant diagrams
5.5 Origin of the transitional lavas
5.5.1 Origin of quartz-normative basalts
5.5.2 Origin of plagioclase-basalts
5.6 Geochemical process
5.6.1 Fractional crystallization
5.6.2 Interaction with continental crust
5.7 Source characteristics
5.8 Partial melting
5.9 Geotectonic context of volcanism of the Bangangté area
5.10 Geodynamic implications
Chapter 6 General conclusions
6.1 conclusions
6.2 Research innovative findings
References
APPENDICE1
ACKNOWLEDGEMENT
PUBLICATIONS
CURRICULUM VITAE
【参考文献】：
期刊论文
[1]A comparative review of petrogenetic processes beneath the Cameroon Volcanic Line: Geochemical constraints[J]. Asobo N.E.Asaah,Tetsuya Yokoyama,Festus T.Aka,Tomohiro Usui,Mengnjo J.Wirmvem,Boris Chako Tchamabe,Takeshi Ohba,Gregory Tanyileke,J.V.Hell. Geoscience Frontiers. 2015(04)
本文编号：3499380
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