本文選題：玄武巖 + 地球化學��； 參考：《巖石學報》2017年06期

【摘要】：塔里木盆地夏河南玄武巖露頭以水平層狀分布為最大特征,其玄武巖層和沉積夾層保持了較原始的產(chǎn)狀,是研究塔里木盆地二疊紀多期次玄武質(zhì)巖漿活動的理想場所,是對比盆地內(nèi)其他玄武質(zhì)巖漿活動的最佳剖面。本文通過詳細的野外和遙感解譯工作,報道了夏河南玄武巖的野外產(chǎn)狀、巖相學特征和各層玄武巖的地球化學特征,探討了夏河南玄武巖的巖漿源區(qū)和巖漿演化過程。研究認為夏河南玄武巖質(zhì)巖漿來源于富集的巖石圈地幔,為尖晶石-石榴石二輝橄欖巖經(jīng)歷低程度部分熔融的產(chǎn)物,各層玄武巖的成分差異與部分熔融程度有關,單一層內(nèi)玄武巖的巖漿演化以分離結晶為主,地殼混染程度較小。夏河南各層玄武巖來源于同一巖漿源區(qū),其特征與柯坪玄武巖相似,可對應于柯坪地區(qū)開派茲雷克組的6層玄武巖。研究進一步明確了塔里木盆地早二疊世玄武巖的空間分布特征,證實塔里木早二疊世大火成巖省的玄武質(zhì)巖漿作用可從柯坪地區(qū)延伸到夏河南、塔中、塔西南等地。
[Abstract]:The outcrop of Henan basalt in Tarim Basin is characterized by horizontal stratiform distribution, and its basalt layer and sedimentary intercalation maintain primitive occurrence, which is an ideal place to study Permian multi-stage Black Tortoise magmatic activity in Tarim Basin. It is the best profile of other Black Tortoise magmatic activities in the basin. Based on detailed field and remote sensing interpretation, this paper reports the field occurrence, lithofacies and geochemical characteristics of basalts in Henan Province, and discusses the magmatic source and magmatic evolution process of basalts in Henan Province. It is considered that the basaltic magma in Henan is derived from the enriched lithospheric mantle and is the product of the low degree of partial melting of spinel garnet erxenite. The composition differences of basalts in each layer are related to the degree of partial melting. The magmatic evolution of basalt in a single layer is mainly separated and crystallized, and the degree of crustal mixing is relatively small. The basalts in Henan are derived from the same magmatic source, and their characteristics are similar to those of Keping basalts, corresponding to the 6 layers of basalts in Kaipaizlek formation in Keping area. The spatial distribution characteristics of early Permian basalt in Tarim Basin are further clarified. It is confirmed that the Black Tortoise magmatism in the early Permian great igneous province of Tarim Basin can be extended from Keping area to Henan, Tazhong and southwest of Tarim Basin.
【作者單位】： 國家海洋局第二海洋研究所海底科學重點實驗室;浙江大學地球科學學院;中山大學地球科學與工程學院;
【基金】：浙江省自然科學基金項目(LY17D020001) 國家自然科學基金項目(41603029) 基本科研業(yè)務費專項資金(JG1518、2017QNA3015)聯(lián)合資助
【分類號】：P588.145

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