干旱区生态环境知识资源中心(Arid): 菲律宾海沉积物中石英的来源及其搬运方式

Arid

	菲律宾海沉积物中石英的来源及其搬运方式
其他题名	THE PROVENANCE AND TRANSPORTATION OF QUARTZ IN THE PHILIPPINES SEA
	朱潇 1; 蒋富清 2; 冯旭光 1; 董江 1; 刘喜停 3; 王红莉 3; 李安春 3
来源期刊	海洋与湖沼
ISSN	0029-814X
出版年	2018
卷号	49 期号:6 页码:1190-1202
中文摘要	为了识别菲律宾海沉积物中风尘信号和源区,以及沉积物的搬运方式,取菲律宾海沉积物中的石英,系统研究了石英的粒度组成、形貌特征、氧同位素特征和结晶度指数。菲律宾海中远离岛弧和海脊的石英粒度较细,西菲律宾海中石英主要由EM1(众数粒径平均为2.9mum)、EM2(众数粒径平均8.17mum)和EM3(众数粒径平均为21.67mum)三个端元组成,东菲律宾海中主要由EM1和EM2两个端元组成。靠近岛弧和海脊的石英粒度较粗,吕宋岛附近的石英具有众数粒径平均为103mum的EM4端元。EM1端元石英表面有明显的碰撞凹坑, EM2端元石英有溶蚀孔洞, EM3端元石英呈棱角状,表面相对光滑。包含EM1端元的石英的delta~(18)O值和结晶度指数与塔克拉玛干沙漠中相同粒级石英的特征相近,不包含EM1端元的石英的delta~(18)O值和结晶度指数与火山岛弧来源的石英特征相近。综合分析表明, EM1端元的石英为主要来自于塔克拉玛干沙漠的风尘石英,经由盛行西风搬运至太平洋,并由南向或西南向的风搬运,最终在菲律宾海沉积。EM2和EM3端元石英主要来源于太平洋火山岛弧,其中, EM2端元的石英经历了强烈的化学风化,经河流或洋流输送到研究区; EM3端元的石英没有经历长距离运输,可能是附近岩石风化的产物。
英文摘要	In order to identify the signal and source of quartz grains and the transport in the sediment of the Philippine Sea, we separated quartz from the bulk sediments and carried out a comprehensive study in grain size, morphology, oxygen isotopic composition, and crystallinity index (CI) of quartz. The results show that the quartz grains in the Philippines Sea away from the arc island and sea rise are fine-grained. In the West Philippines Sea, quartz is mainly composed of three grain-size end-members (EM), including EM1 (average modal grain size: 2.9mum), EM2 (average modal grain size: 8.17mum), and EM3 (average modal grain size: 21.67mum), while in the East Philippine Sea, quartz is mainly composed of EM1 and EM2 endmembers. In contrast, quartz is coarse near the arc island and sea ridge, e.g., quartz near the Luzon Island has a coarser EM4 in a modal grain size of 103 mum. There are obvious collision pits on the surface of the EM1 quartz, and dissolution pits in the EM2 quartz. The EM3 quartz is angular and the surface is relatively smooth. The delta~(18)O value and CI of quartz containing EM1 are close to that of from the Taklimakan Desert. EM2 and EM3 quartzes are similar in a volcanic origin. We thus conclude that the EM1 quartz is eolian quartz from Taklimakan Desert, which is transported by westerly wind to the Pacific Ocean, then transported by south or southwest wind, finally deposited in the Philippine Sea. The EM2 and EM3 quartzes are in volcanic origin that derived from the Pacific volcanic arcs. The EM2 that experienced strong chemical weathering is transported to the study area by ocean currents or fluvial discharge. The volcanic EM3 quartz does not experience long-distance transportation, which might be the weathering product of nearby rocks.
中文关键词	菲律宾海 ; 石英 ; 风尘 ; 源区 ; 古气候
英文关键词	Philippines sea quartz dust sources paleoclimate
语种	中文
国家	中国
收录类别	CSCD
WOS类目	MINERALOGY
WOS研究方向	Mineralogy
CSCD记录号	CSCD:6375561
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/237817
作者单位	1.中国科学院海洋研究所;;中国科学院大学, 中国科学院海洋地质与环境重点实验室;;, 青岛;;, ;;北京 266071;;100049; 2.中国科学院海洋研究所;;中国科学院海洋大科学研究中心, 中国科学院海洋地质与环境重点实验室;;, 青岛;;青岛, ;; 266071;;266071; 3.中国科学院海洋研究所, 中国科学院海洋地质与环境重点实验室, 青岛, 山东 266071, 中国
推荐引用方式 GB/T 7714	朱潇,蒋富清,冯旭光,等. 菲律宾海沉积物中石英的来源及其搬运方式[J],2018,49(6):1190-1202.
APA	朱潇.,蒋富清.,冯旭光.,董江.,刘喜停.,...&李安春.(2018).菲律宾海沉积物中石英的来源及其搬运方式.海洋与湖沼,49(6),1190-1202.
MLA	朱潇,et al."菲律宾海沉积物中石英的来源及其搬运方式".海洋与湖沼 49.6(2018):1190-1202.