He Li

He Li
Institute of Oceanology,Chinese Academy of Sciences

About

54
Publications
34,779
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1,540
Citations
Citations since 2016
36 Research Items
1394 Citations
2016201720182019202020212022050100150200250
2016201720182019202020212022050100150200250
2016201720182019202020212022050100150200250
2016201720182019202020212022050100150200250

Publications

Publications (54)
Article
Whether or not oceanic crust basalts are affected by plate subduction is a hot topic of debate. The South China Sea is one of the largest marginal basins in the western Pacific Ocean and has been surrounded by subduction of the Pacific plate and Indian plate, yet, to date, no study has clearly shown evidence of subduction in the geochemistry of vol...
Article
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Early Cretaceous A-type granitic plutons are widely distributed in Shandong Peninsula, which are of great significance to understanding the regional tectonic evolution. Here we report geochemical characteristics, geochronological results, and zircon Hf-O isotope compositions of Wulian granites to reveal its origin and geological significance. Wulia...
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Sediment mass accumulation rate (MAR) is a proxy for paleoceanographic conditions, especially if biological productivity generated most of the sediment. We determine MAR records from pelagic calcareous sediments in Tasman Sea based on analysis of 11 boreholes and >3 million seismic reflection horizon picks. Seismic data from regions of 10,000–30,00...
Article
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Rapid onset of subduction tectonics across the western Pacific convergent margins in the early Eocene was followed by a slower phase of margin growth of the proto Tonga-Kermadec subduction system north of Zealandia during a middle Eocene phase to tectonic adjustment. We present new age constraints from International Ocean Discovery Program Expediti...
Article
To better constrain Ca isotopic fractionation during volcanic magma differentiation, we report Ca isotope data for a series of volcanic glasses from the eastern Manus Basin that represent a continuum of compositions comprising basaltic andesite, andesite, dacite, and rhyolite. Our results show that these volcanic glasses exhibit ∼0.25‰ variation in...
Article
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The history of the Hawaiian hotspot is of enduring interest in studies of plate motion and mantle flow, and has been investigated by many using the detailed history of the Hawaiian-Emperor Seamount chain. One of the unexplained aspects of this history is the apparent offset of several Emperor seamounts from the Hawaii plume track. Here we show that...
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The magmatic character of early subduction zone and arc development is unlike mature systems. Low-Ti-K tholeiitic basalts and boninites dominate the early Izu-Bonin-Mariana (IBM) system. Basalts recovered from the Amami Sankaku Basin (ASB), underlying and located west of the IBM’s oldest remnant arc, erupted at ~49 Ma. This was 3 million years afte...
Article
The oldest known, intact sedimentary record of a nascent intraoceanic arc was recovered in a ∼100-m-thick unit (IV) above ca. 49 Ma basaltic basement at International Ocean Discovery Program Site U1438 in the Amami Sankaku Basin. During deposition of Unit IV the site was located ∼250 km from the plate edge, where Izu-Bonin-Mariana subduction initia...
Preprint
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The character of magmatism associated with the early stages of subduction zone and island arc development is unlike that of mature systems, being dominated in the Izu-Bonon-Mariana (IBM) case by low-Ti-K tholeiitic basalts and boninites. Basalts recovered by coring the basement of the Amami Sankaku Basin (ASB), located west of the oldest remnant ar...
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International Ocean Discovery Program (IODP) Expedition 351 ‘Izu–Bonin–Mariana (IBM) Arc Origins’ drilled Site U1438, situated in the northwestern region of the Philippine Sea. Here volcaniclastic sediments and the igneous basement of the proto-IBM volcanic arc were recovered. To gain a better understanding of the magmatic processes and evolution o...
Article
Full-text available
International Ocean Discovery Program (IODP) Expedition 351 ‘Izu–Bonin–Mariana (IBM) Arc Origins’ drilled Site U1438, situated in the northwestern region of the Philippine Sea. Here volcaniclastic sediments and the igneous basement of the proto-IBM volcanic arc were recovered. To gain a better understanding of the magmatic processes and evolution o...
Article
Full-text available
Data from International Ocean Discovery Program (IODP) Expedition 371 reveal vertical movements of 1–3 km in northern Zealandia during early Cenozoic subduction initiation in the western Pacific Ocean. Lord Howe Rise rose from deep (~1 km) water to sea level and subsided back, with peak uplift at 50 Ma in the north and between 41 and 32 Ma in the s...
Article
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绝大多数斑岩铜金矿床分布在汇聚板块边缘。研究表明高氧逸度和洋壳部分熔融是控制斑岩铜金矿床形成的两个关键因素。作为亲硫元素,铜金的性质主要受还原态的硫(S2-)控制,而硫的价态和性质则强烈受氧逸度的影响。矿床学家很早就发现氧逸度FMQ+2是斑岩铜金矿床成矿的魔幻数字。研究发现其原因是硫的性质在此氧逸度附近发生巨变,在低氧逸度时,硫主要以硫化物的形式存在,但是当氧逸度在FMQ+1.5以上时,硫主要以硫酸根的形式存在。硫酸盐在岩浆中的溶解度通常是硫化物的10倍左右,因此在部分熔融过程中,高氧逸度可以大幅度提高硫在岩浆中的溶解度,有利于源区硫化物被破坏,以硫酸根的形式被熔出,从而大幅度提高初始岩浆中的铜(金)含量;与此同时,硫化物在岩浆演化过程中可以保持不饱和状态,有利于作为中度不相容元素的铜(...
Article
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The driving forces of plate motion, especially that of its sudden change over time, has long been debated. During the closure of an old ocean, the subduction process of the mid-ocean ridge provides valuable clues to quantitative evaluation of the driving forces of plate tectonics. Here we show that the drifting rates of the Indian plate were correl...
Article
Apatite is ubiquitous in A-type granites, and can be used to elucidate the volatile contents of the silicate melt, which reflect its source characteristics. A-type granites have been recognized as a distinct group of granites. A1- and A2-type subgroups are produced under different extensional settings. However, the details of the mechanisms behind...
Article
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International Ocean Discovery Program (IODP) Expedition 371 drilled six sites in the Tasman Sea of the southwest Pacific between 27 July and 26 September 2017. The primary goal was to understand Tonga-Kermadec subduction initiation through recovery of Paleogene sediment records. Secondary goals involved understanding regional oceanography and clima...
Article
Full-text available
International Ocean Discovery Program (IODP) Expedition 371 drilled six sites in the Tasman Sea of the southwest Pacific between 27 July and 26 September 2017. The primary goal was to understand Tonga-Kermadec subduction initiation through recovery of Paleogene sediment records. Secondary goals involved understanding regional oceanography and clima...
Article
Full-text available
Early Cretaceous adakite or adakitic plutons are widely distributed in central eastern China, e.g. lower Yangtze river belt (LYRB), the south Tan–Lu fault (STLF), and the Dabie orogen. Their genesis, however, remains controversial. In this contribution, we present detailed geochemical and geochronological study on the Guandian pluton in central Anh...
Article
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Subduction initiation is a key process for global plate tectonics. Individual lithologies developed during subduction initiation and arc inception have been identified in the trench wall of the Izu–Bonin–Mariana (IBM) island arc but a continuous record of this process has not previously been described. Here, we present results from International Oc...
Article
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Copper is a moderately incompatible chalcophile element. Its behavior is strongly controlled by sulfides. The speciation of sulfur is controlled by oxygen fugacity. Therefore, porphyry Cu deposits are usually oxidized (with oxygen fugacities > ΔFMQ +2) (Mungall 2002; Sun et al. 2015). The problem is that while most of the magmas at convergent margi...
Article
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The Late Mesozoic Qianlishan granitic complex in the western Nanling Range, South China is associated with the Shizhuyuan giant W-Sn-Mo-Bi polymetallic deposit. It mainly consists of three phases of intrusions, P-1 porphyritic biotite granite, P-2 equigranular biotite granite and P-3 granite porphyry. All three phases of granite contain quartz, pla...
Article
Keenan and Encarnación suggest that the absence of pre-subduction inception basement in the drill core data taken from site U1438 raises ambiguity in our conclusion of spontaneous subduction initiation in the Izu–Bonin–Mariana system. However, there is no evidence for uplift in the earliest products of the Izu–Bonin–Mariana system preceding rifting...
Article
Magnetite crisis refers to the abrupt decrease of Cu, Au contents in convergent magin magmas induced by magnetite. The crystalization of magnetite in oxidized magmas causes sulfate reduction, forming hydrosuifide complexes that scavenge Cu and Au into hydrous phase, resulting in ore-forming fluids. This is one of the key processes that control porp...
Article
The initiation of tectonic plate subduction into the mantle is poorly understood. If subduction is induced by the push of a distant mid-ocean ridge or subducted slab pull, we expect compression and uplift of the overriding plate. In contrast, spontaneous subduction initiation, driven by subsidence of dense lithosphere along faults adjacent to buoya...
Article
The porphyry Cu-Au deposits since about 5Ma in Luzon, Philippines are clustered together in Baguio and Mankayan districts. Seismic data between 1907 and 2013 show that a low frequency of earthquake events happened in the area near 16°N in central Luzon, and the porphyry Cu-Au deposits are located on both sides of this area. As indicated by the Sr/Y...
Article
X-ray fluorescence computed tomography is an emerging imaging modality that allows for the nondestructive reconstruction of the internal distribution of elements within a sample. The common use of X-ray excitation energy (up to approximately 20 keV) has necessitated the use of l-shell fluorescence for heavy elements. In this study, based on high en...
Article
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Porphyry deposits supply most of the world's Cu and Mo resources. Over 90% of the porphyry deposits are found at convergent margins, especially above active subduction zones, with much fewer occurrences at post-collisional or other tectonic settings. Porphyry Cu-(Mo)-(Au) deposits are essentially magmatic-hydrothermal systems, which are generally i...
Article
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The Sihui pluton, located in Sihui City, Guangdong Province, consists mainly of biotite granite, muscovite-granite, K-Feldspar granite. In this study, we carried out in situ LA-ICP-MS zircon U-Pb dating and zircon trace element analysis, together with whole rock major and trace element analysis for the Sihui granites. A total of 20 U-Pb analyses ha...
Article
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Essentially all porphyry deposits are closely associated with oxidized magmas at convergent margins. The best oxygen fugacities for porphyry mineralization is ΔFMQ +2 to +4 [1]. This is controlled by the interactions between sulfur and iron. Sulfur is the most important geosolvent controlling the behavior of Cu and other chalcophile elements. A sma...
Article
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Haiyang granite complex consists of K-feldspar granite and syenite, with a total exposure area of ~ 600 km2. The K-feldspar granite is metaluminous (A/CNK = 0.70 to 0.99) and the syenite is slightly peraluminous (A/CNK = 1.01 to 1.10), both of which have typical characteristics of A-type granite with high total alkali contents and FeOT/(FeOT + MgO)...
Article
The Yangshan gold ore field is located in the southern subzone of the Western Qinling Orogen. Mineralization is confined by the east-west-striking Anchanghe thrust fault zone. These subparallel faults constitute a branch of the regional Mianlue structural zone, crosscutting Middle Devonian carbonaceous carbonate and clastic rock sequences, an ore-b...
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Granitoids near the Bayan Obo giant rare earth element (REE) deposit at the north margin of the North China Craton (NCC), the world’s largest light REE (LREE) deposit, have been taken by some authors as the key factors that controlled the mineralization. In contrast, others proposed that the REE deposit has been partially destructed by these granit...
Article
The enrichment of gold in arsenian pyrite is usually associated closely with the enrichment of arsenic in the mineral, generally known as As1--pyrite [Fe(As, S)(2)]. Direct analyses of the valence state of Au in pyrite are, however, difficult due to generally low (similar to ppm level) Au concentrations. By means of X-ray photoelectron spectroscopy...
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Early Cretaceous A-type granites in the Lower Yangtze River belt, central eastern China, with both A(1) and A(2) chemical subgroups, formed at 125 +/- 2 Ma, after a Cretaceous ridge subduction. Remarkably, A(1) and A(2) group granites are distributed in three zones, roughly parallel to each other and to a slightly older adakite belt. In general, A(...
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The Early Cretaceous Huangmeijian Pluton is an A-type granite located on the northern bank of the Lower Yangtze River in Anhui Province, east-central China. It intruded the SE edge of the Early Cretaceous Luzong volcanic basin. The moderate- to coarse-grained granite is mainly composed of alkali feldspar, plagioclase, and quartz and has a typical A...

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