CAJ | 학술논문

应用常量元素、微量元素对火山岩进行构造环境、成因及岩源示踪时，首先必须在宏观区域地质、地球化学调查基础上，结合当时所形成的各类地质体岩石类型组合来恢复，它是宏观构造环境判别的基础；其次，由于构造环境时空复杂性，需采用“两结合”的研究方法，一是多元地球化学信息示踪，二是不同岩类的时空配套；第三，在选择判别图解时，弄清前人图解的应用前提、适用范围和条件，切忌乱套瞎投.在此思想指导下，侧重对滇西北金沙江结合带霞若—拖顶地区两类中-基性火山岩进行了多元地球化学示踪，获得了较好的效果：（1）金沙江蛇绿混杂岩带东侧的基性火山岩产于大陆裂谷环境，而西侧中-基性火山岩具岛弧火山岩特征；（2）两者火山熔浆均源自富集地幔，东侧来自均一的富集地幔，而西侧富集地幔具不均一性；（3）在此基础上讨论了它们形成的构造演化特征.
응용상량원소、미량원소대화산암진행구조배경、성인급암원시종시，수선필수재굉관구역지질、지구화학조사기출상，결합당시소형성적각류지질체암석류형조합래회복，타시굉관구조배경판별적기출；기차，유우구조배경시공복잡성，수채용“량결합”적연구방법，일시다원지구화학신식시종，이시불동암류적시공배투；제삼，재선택판별도해시，롱청전인도해적응용전제、괄용범위화조건，절기란투할투.재차사상지도하，측중대전서북금사강결합대하약—타정지구량류중-기성화산암진행료다원지구화학시종，획득료교호적효과：（1）금사강사록혼잡암대동측적기성화산암산우대륙렬곡배경，이서측중-기성화산암구도호화산암특정；（2）량자화산용장균원자부집지만，동측래자균일적부집지만，이서측부집지만구불균일성；（3）재차기출상토론료타문형성적구조연화특정.
When using major and trace elements as a tool to trace tectonicsettings，origins and magma sources of volcanic rocks，we must firstly reconstruct the elements on the bases of macro-regional geology and geochemical investigations，and of various kinds of rock-type assemblages in different geological bodies that occurred at that time. This reconstruction serves as the basis for the identification of the macro-tectonic settings. Secondly，we should adopt the research method characterized by the combination of the multiple geochemical information tracing with the temporal-spatial matching of various kinds of rock types, due to the temporal-spatial complexity of the tectonic settings. Thirdly，we should fully understand the application premises，ranges and conditions, so as to identify correctly the corresponding illustrations. On the basis of the three points mentioned above, this paper focuses on the multiple geochemical tracing of the two types of intermediate-basic volcanic rocks in Xiaruo-Tuoding areas in the Jinsha River combination zone, Northwest of Yunnan Province, China. This research has already brought us the following three relatively excellent effects: (1) The basic volcanic rocks located on the eastern side of the Jingsha River ophiolitic mélange zone occurred in the continental-rift setting. However, the intermediate-basic volcanic rocks are characterized by the island-arc volcanic rocks on the western side of Jingsha River ophiolitic mélange zone. (2) The volcanic lava of the two types of volcanic rocks both originated from the lava-enriched earth mantle. Specifically, the volcanic rock on the eastern side originated from the homogeneous lava-enriched earth mantle, while those on the eastern side originated from the heterogeneous lava-enriched earth mantle. (3) Finally, the structural evolutionary characteristics of these volcanic rocks are discussed.