Zeitschriftenartikel zum Thema „Outer forearc high“

Abstract A grid of closely spaced, high-resolution multichannel seismic (MCS) reflection profiles was acquired in May 2012 over the outer accretionary prism up dip from the patch of greatest slip during the 2010 Mw 8.8 Maule earthquake (offshore Chile) to complement a natural-source seismic experiment designed to monitor the post-earthquake response of the outer accretionary prism. We describe the MCS data and discuss the implications for the response of the accretionary prism during the earthquake and for the long-term evolution of the margin. The most notable observation from the seismic reflection survey is a rapid north-to-south shift over a short distance from nearly total frontal accretion of the trench sediments to nearly total underthrusting of undeformed trench sediments that occurs near the northern edge of slip in the 2010 earthquake. Integrating our structural observations with other geological and geophysical observations, we conclude that sediment subduction beneath a shallow décollement is associated with propagation of slip to the trench during great earthquakes in this region. The lack of resolvable compressive deformation in the trench sediment along this segment of the margin indicates that the plate boundary here is very weak, which allowed the outer prism to shift seaward during the earthquake, driven by large slip down dip. The abrupt shift from sediment subduction to frontal accretion indicates a stepdown in the plate boundary fault, similar to the stepovers that commonly arrest slip propagation in strike-slip faults. We do not detect any variation along strike in the thickness or reflective character of the trench sediments adjacent to the change in deformation front structure. This change, however, is correlated with variations in the morphology and structure of the accretionary prism that extend as far as 40 km landward of the deformation front. We speculate that forearc structural heterogeneity is the result of subduction of an anomalously shallow or rough portion of plate that interacted with and deformed the overlying plate and is now deeply buried. This study highlights need for three-dimensional structural images to understand the interaction between geology and slip during subduction zone earthquakes.

SUMMARYWe have conducted the first passive Ocean Bottom Seismograph (OBS) experiment near the Challenger Deep at the southernmost Mariana subduction zone by deploying and recovering an array of 6 broad-band OBSs during December 2016–June 2017. The obtained passive-source seismic records provide the first-ever near-field seismic observations in the southernmost Mariana subduction zone. We first correct clock errors of the OBS recordings based on both teleseismic waveforms and ambient noise cross-correlation. We then perform matched filter earthquake detection using 53 template events in the catalogue of the US Geological Survey and find >7000 local earthquakes during the 6-month OBS deployment period. Results of the two independent approaches show that the maximum clock drifting was ∼2 s on one instrument (OBS PA01), while the rest of OBS waveforms had negligible time drifting. After timing correction, we locate the detected earthquakes using a newly refined local velocity model that was derived from a companion active source experiment in the same region. In total, 2004 earthquakes are located with relatively high resolution. Furthermore, we calibrate the magnitudes of the detected earthquakes by measuring the relative amplitudes to their nearest relocated templates on all OBSs and acquire a high-resolution local earthquake catalogue. The magnitudes of earthquakes in our new catalogue range from 1.1 to 5.6. The earthquakes span over the Southwest Mariana rift, the megathrust interface, forearc and outer-rise regions. While most earthquakes are shallow, depths of the slab earthquakes increase from ∼100 to ∼240 km from west to east towards Guam. We also delineate the subducting interface from seismicity distribution and find an increasing trend in dip angles from west to east. The observed along-strike variation in slab dip angles and its downdip extents provide new constraints on geodynamic processes of the southernmost Mariana subduction zone.

This investigation of Upper Cretaceous and lower Paleogene sediments from the Tibetan Himalayas, based on three stratigraphic sections from the southern margin of Asian Plate and nine sections from the northern Indian Plate margin, provides the first high resolution biostratigraphic description of the region. The sedimentary successions from these two plate margins evolved during the following depositional stages, which we here divide into eleven new biozones (TLK2-3 and TP1-9); (i) an outer neritic stage from the Coniacian to the Maastrichtian, dominated by keeled planktonic foraminifera (PF), such as Globotruncana (TLK2); (ii) a latest Maastrichtian forereef assemblage dominated by Lepidorbitoides, Omphalocyclus and Orbitoides (TLK3); (iii) an early Paleocene, intermittently occurring backreef/shallow reefal warm environment with benthic assemblages dominated by small miliolids and rotaliids, such as Daviesina and Lockhartia (TP1-2); (iv) a late Paleocene-early Eocene, shallow reefal environment dominated by warm water forms, such as Alveolina, Assilina and Nummulites (TP3-7); (v) a depositional stage showing a slight deepening of the reef, with forereef assemblages, lasting until the end of the Ypresian (TP8); (vi) a final, early Lutetian depositional stage characterised by the complete disappearance of the larger benthic foraminifera (LBF) and their reefal environment, which was replaced by PF assemblages with intense reworking of pelagic facies triggered by the tectonics of the India-Asia collision (TP9). During the course of this study two unnamed species have been identified and described, Lepidorbitoides sp. A and Discocyclina sp. A, from the Xigaze forearc basin. The high resolution depositional and biostratigraphic scheme defined here for the southern Himalayan region gives greater insight into the general evolution of this globally important tectonic region.We have confirmed earlier observations that many LBF forms appear about 1Ma later in the eastern part of Tethys than they do in the west, reflecting their previously inferred gradual eastern paleogeographic migration. Additionally, this study has allowed us to refine the biostratigraphic ranges of some LBF of the Eastern Tethys, and for the first time to exactly correlate these Eastern Tethyan zones with the Shallow Benthic Zones (SBZs) of the Western Tethys.

Knowing the evolution of the skin’s response to mechanical solicitations and understanding its origin is important in medicine, surgery, and cosmetics. Studies performed in vitro and ex vivo show that links exist between the topographic skin properties and the collagen and elastin fibers network in the dermis. But, to our knowledge, no in vivo study shows this link. In this study we propose a combination of experimental tests to demonstrate the link between the topographic skin properties and the fibers network in the dermis in vivo. The first method consists in analyzing the skin relief images. The second method uses a recently developed imaging technique of human skin in vivo with a high spatial resolution: Line-field Confocal Optical Coherence Tomography (LC-OCT). This technology provides two types of images modalities: vertical and horizontal section images. The skin relief images and its internal layers are carried out for the skin at rest and during a folding test. The latter is performed using a folding system developed in this study. From these images, we calculate the density of the skin lines printed on the skin surface and their orientations. Thanks to the two modalities of LC-OCT, we obtain the full 3D image of the skin volume. From these images we extract the fibers density and their orientation in the plans parallel and perpendicular to the outer skin surface. The study is carried out on 42 volunteers aged from 20 to 55 years-old. Skin relief analysis and LC-OCT images are performed on the skin of the forearm and thigh. The results show similar distributions of the skin lines on the surface and of its fibers in the volume. We could observe a correlation between the skin lines at the surface and the structure in depth of its layers in the volume (0.40 < rSpearman < 0.73).

Introduction Contact dermatitis can have an irritating or allergic background and are the most frequently encountered occupational dermatosis. Allergic Contact Dermatitis can be of occupational origin and most often affects the hands, wrists, and forearms. The occupational and clinical history is critical for its diagnosis. The relationship between the symptoms and work, identifying substances that may cause the dermatosis is important to perform epicutaneous tests. The initial stage of treatment consists of evicting the agent, which may include removing the worker from his workplace. Early and appropriate treatment is important to prevent further deterioration and persistence of skin lesions. Case Report 47-year-old man, a plumber for thirty years, and no relevant personal background. About seventeen years ago, he started erythematous, scaly, and fissured lesions on the dorsum of both hands and in the interdigital spaces, which he associated with his professional activity. Initially, he did not wear gloves when working with plastic pipes, glues, sealants, and other rubber and steel materials. With the appearance of the injuries, he began to use them, without improvement. However, he kept the injuries. Dermatology followed it, where it performed the first epicutaneous tests with positivity for the agent Isopropyl-N-Phenyl 4 Phenylenediamine, present in rubbers. Due to continued exposure to the agent present in his workplace, with consequent worsening of the skin lesions, he returned to the consultation. He carried out new epicutaneous tests that revealed new positivities: Paraphenylenediamine, Mixture of Thiurans and Colophony. These agents are present in his work, and the diagnosis of Occupational Allergic Contact Dermatitis was assumed. Discussion/ Conclusion Occupational Allergic Contact Dermatitis is associated with high personal and professional suffering, loss of earning capacity and decreased productivity. Given the multiplicity of sensitized agents, this case was a challenge for Occupational Health, as it was present in various work materials and protective equipment. In this case, it was not possible to leave the workplace, which was not the option accepted by the worker, so the management of the case involved minimizing contact, giving preference to other types of materials, by reducing the time and intensity of exposure, using safer individual protection material, as well as using inner cotton gloves and outer vinyl gloves, in addition to concomitant pharmacological treatment. This case is also positive for other agents due to cross-reactivity, as well as the multiplicity of reactions that was partly caused by the continuous injury to the skin. Keywords: Allergic Contact Dermatitis; Isopropyl-N-Phenyl 4 Phenylenediamine; Paraphenylenediamine; Tiurans; Colophony.

Topicality. The end of the XX and beginning of the XXI century has been marked by the introduction of information technology to didactic biomechanics. Software and hardware systems that allow real-time processing of data uploaded to the computer have become widespread. The task of the study is to analyse the technique of "elbow lever outward" drill, performed by cadets of the fourth year of study using the optoelectronic system "Qualisys". Research methods. To achieve the set tasks, we have applied such research methods as analysis of scientific and methodological literature as well as documentary materials, methods of registration and analysis of athlete's movements (system of video recording and analysis of athlete's movements, 3D recording of human movements "Qualisys Motion Capture"). The results obtained during the study have been processed with the help of mathematical statistics methods. Results of the research. The duration of actions when performing "elbow lever outward" drill by cadets with the first blow of the hand is an average of 3,150 s (S = 0,101). The first movement involves performing swing or propulsion with the right hand. This action, according to experimental data, involves the pelvis and torso (a counter-clockwise movement). In 0.406 s (S = 0.050) after the start of the action, the cadet strikes with the right hand on the imaginary offender’s torso (usually in the chest area). Capture of imaginary offender’s right hand by the cadet with their left hand occurs in 0,298 s (S = 0,048) after blow. In another 0.237 s (S = 0.034) the cadet of the fourth year of study additionally fixes the imaginary offender’s hand, performing its capture with their right hand. Thus, for complete fixation of the detainee's right hand (for the purpose of further performance of the drill) cadets spend more than 0,500 s. Further actions are related to the removal of the detainee's body from equilibrium, which is achieved by lateral twisting of their right hand and forearm, causing pain for imaginary offender and making them manageable, thus, allowing the cadet by further withdrawal of the imaginary offender's hand back (relative to the latter) lower the offender to the floor and make further rotational movement of their body already on the support area. Conclusions. At present, one of the most important aspects of didactic biomechanics is the arrangement of learning process for studying laws and patterns of motor actions. A key element of the learning process regarding the patterns of motor actions, in our opinion, is the use of video recording systems and application packages for biomechanical analysis. Currently, in the sports practice, the analysis of sports technique is inconceivable without the use of high-precision measuring equipment, which allows the specialist to assess both the inner and outer sides of the movement. In experimental studies conducted in the laboratory, we have simulated the situation of the employee's capture of an imaginary offender during their walk with the help of performing "elbow lever outward" drill technique on detainee’s both right and left sides. The analysis of the obtained data shows the absence of statistically significant differences between the indicators of "elbow lever outward" drill, which was carried out both on the right and on the left sides of the detainee in the laboratory conditions (p> 0.05). The data of the pedagogical experiment allowed determining the quantitative indicators of "elbow lever outward" drill performed by cadets during 4 years of their study.

We present new coupled detrital zircon trace-element and U–Pb age data from Valanginian–Santonian strata of the Nacimiento forearc basin (California, USA) to enhance provenance discrimination and investigate the evolution of the late Mesozoic California margin. Our data document at least five different Jurassic–earliest Cretaceous zircon populations with variable U/Yb ratios, and zircon that displays systematically increasing U/Yb from 130 to 80 Ma. Based on the presence of a distinctive population of geochemically primitive, 168–157 Ma low-U/Yb zircon that is found in Albian–Lower Cenomanian strata but not in older Valanginian strata, we infer a period of uplift and Albian–early Cenomanian erosion of forearc basement (the Coast Range ophiolite) that was coincident with increasing Cordilleran arc magmatic flux.

Studies of recent destructive megathrust earth­quakes and tsunamis along subduction margins in Japan, Sumatra, and Chile have linked forearc mor­phology and structure to megathrust behavior. This connection is based on the idea that spatial varia­tions in the frictional behavior of the megathrust influence the tectono-morphological evolution of the upper plate. Here we present a comprehen­sive examination of the tectonic geomorphology, outer wedge taper, and structural vergence along the marine forearc of the Cascadia subduction zone (offshore northwestern North America). The goal is to better understand geologic controls on outer wedge strength and segmentation at spatial scales equivalent to rupture lengths of large earthquakes (≥M 6.7), and to examine potential linkages with shallow megathrust behavior. We use cross-margin profiles, spaced 25 km apart, to characterize along-strike variation in outer wedge width, steepness, and structural vergence (measured between the toe and the outer arc high). The width of the outer wedge varies between 17 and 93 km, and the steepness ranges from 0.9° to 6.5°. Hierarchical cluster analysis of outer wedge width and steepness reveals four distinct regions that also display unique patterns of structural ver­gence and shape of the wedge: Vancouver Island, British Columbia, Canada (average width, linear wedge, seaward and mixed vergence); Washington, USA (higher width, concave wedge, landward and mixed vergence); northern and central Oregon, USA (average width, linear and convex wedge, mixed and seaward vergence); and southern Oregon and northern California, USA (lower width, convex wedge, seaward and mixed vergence). Variabil­ity in outer wedge morphology and structure is broadly associated with along-strike megathrust segmentation inferred from differences in oceanic asthenospheric velocities, patterns of episodic tremor and slow slip, GPS models of plate locking, and the distribution of seismicity near the plate interface. In more detail, our results appear to delin­eate the extent, geometry, and lithology of dynamic and static backstops along the margin. Varying backstop configurations along the Cascadia mar­gin are interpreted to represent material-strength contrasts within the wedge that appear to regulate the along- and across-strike taper and structural vergence in the outer wedge. We argue that the morphotectonic variability in the outer wedge may reflect spatial variations in shallow megathrust behavior occurring over roughly the last few million years. Comparing outer wedge taper along the Cascadia margin to a global compilation suggests that observations in the global catalog are not accurately representing the range of hetero­geneity within individual margins and highlights the need for detailed margin-wide morphotectonic analyses of subduction zones worldwide.

Abstract The 16 March 2022 M 7.4 Fukushima–Oki earthquake is the largest one among forearc intraslab earthquakes in Japan since 2000. These subcoast events can cause severe damage to the local society because of their proximity to inhabited areas. However, their generating mechanism is still not clear. Here, we present 3D high-resolution seismic tomography of the source zone of four large intraslab events (M ≥7.0) during 2003–2022 in northeast Japan, which is obtained by inverting high-quality arrival-time data recorded at both onshore and offshore seismic stations. Aftershocks of the subcoast intraslab earthquakes are mainly distributed in gaps of high-velocity bodies with high Poisson’s ratio and at the upper ∼20 km depth of the subducting Pacific slab. Our results indicate that the four large intraslab events were caused by rupturing of buried hydrated faults that formed at the outer rise and dehydration embrittlement on the fault planes.

AbstractSeismic anisotropy tomography is the updated geophysical imaging technology that can reveal 3-D variations of both structural heterogeneity and seismic anisotropy, providing unique constraints on geodynamic processes in the Earth’s crust and mantle. Here we introduce recent advances in the theory and application of seismic anisotropy tomography, thanks to abundant and high-quality data sets recorded by dense seismic networks deployed in many regions in the past decades. Applications of the novel techniques led to new discoveries in the 3-D structure and dynamics of subduction zones and continental regions. The most significant findings are constraints on seismic anisotropy in the subducting slabs. Fast-velocity directions (FVDs) of azimuthal anisotropy in the slabs are generally trench-parallel, reflecting fossil lattice-preferred orientation of aligned anisotropic minerals and/or shape-preferred orientation due to transform faults produced at the mid-ocean ridge and intraslab hydrated faults formed at the outer-rise area near the oceanic trench. The slab deformation may play an important role in both mantle flow and intraslab fabric. Trench-parallel anisotropy in the forearc has been widely observed by shear-wave splitting measurements, which may result, at least partly, from the intraslab deformation due to outer-rise yielding of the incoming oceanic plate. In the mantle wedge beneath the volcanic front and back-arc areas, FVDs are trench-normal, reflecting subduction-driven corner flows. Trench-normal FVDs are also revealed in the subslab mantle, which may reflect asthenospheric shear deformation caused by the overlying slab subduction. Toroidal mantle flow is observed in and around a slab edge or slab window. Significant azimuthal and radial anisotropies occur in the big mantle wedge beneath East Asia, reflecting hot and wet upwelling flows as well as horizontal flows associated with deep subduction of the western Pacific plate and its stagnation in the mantle transition zone. The geodynamic processes in the big mantle wedge have caused craton destruction, back-arc spreading, and intraplate seismic and volcanic activities. Ductile flow in the middle-lower crust is clearly revealed as prominent seismic anisotropy beneath the Tibetan Plateau, which affects the generation of large crustal earthquakes and mountain buildings.

Forearm skin flaps are widely used to reconstruct oral cancer due to their advantages, such as vascular stability, simple preparation, and a high success rate. However, traditional forearm skin flaps have shortcomings: the donor site requires grafting, which increases surgical trauma by creating a second surgical area, and the scarring at the donor site significantly affects the esthetics of the forearm. Therefore, we have designed a new ^-shaped radial forearm skin flap, in which the flap is designed as 2 semi-elliptical subunits. After the flap is harvested, these 2 subunits are joined, and the reserved skin at the donor site is directly sutured to the outer part of the donor site. The area of the ^-shaped radial forearm skin flap can be as large as that prepared with traditional forearm skin flaps, and there is no need for grafting at the donor site. This avoids additional trauma to the donor site after surgery, significantly reduces related complications, and enhances the esthetic outcome. This paper reports a case of a cheek cancer (carcinoma of the buccal mucosa) patient (T3N0M0), where the flap survived postoperatively, and both the surgical site and donor site healed in the first phase. The patient has no sensory or functional impairments; swallowing and speech functions are satisfactory.

Oral cancers are considered slow killer disease. Every year 3,00,000 cases are diagnosed worldwide. Public awareness has been a great challenge to educate people to avoid harmful oral habits to prevent oral cancer. People are not aware about life threatening complications such as death due to oral cancer. Oral cancer is the eighth most common malignancy in India and third most common malignancy in South East Asia. Buccal mucosa carcinoma spreads rapidly and invades deeply to underlying tissues and has high recurrence rate. Surgical resection is more challenging if the tumour invade adjacent anatomical structures and reconstruction should be planned according to extent of tumour resection. Regional flaps are used for oral cavity after tumour resection such as radial forearm flap, deltopectoral flap, pectoralis major flap, latissimus dorsi flap, transverse rectus abdominis myocutaneous flap, trapezius flap. In this case report folded forehead pedicle flap was used to provide both inner and outer linings of the cheek defect following buccal mucosa tumour resection.

AbstractBackgroundStratum corneum (SC) plays a critical role in skin barrier function for protection and defense in nature. The acidic skin pH, which is also known as the acid mantle, is very important in fighting against outer environmental threats, especially, bacteria. Furthermore, recent research has shown that the transient bacteria could potentially penetrate into deeper layer of the SC down to a few micrometers while posing an additional threat to the deeper layers of the skin.AimTo develop a sequential tape stripping method for assessing the impact of personal cleansing product on the SC surface layers' acid mantle properties and antimicrobial defense against transient bacteria.MethodsFifty‐five subjects were recruited. High pH soap‐based Product 1 and low pH synthetic surfactant‐based Product 2 were applied on the left and right forearms of each subject. Sequential tape stripping was performed on the same spots to access multiple layers of the skin SC. Both antimicrobial defense property and skin pH of different skin layers were evaluated at baseline and 12 h after treatment.ResultsThe skin's antimicrobial defense was significantly higher 12 h after treatment of the low pH Product 2 as compared to the treatment of high pH Product 1. In fact, this trend was consistent across all three skin layers (Layer 1 to Layer 3) as measured in this study (p < 0.01). Furthermore, the skin surface pH of Layer 1 and Layer 3 were also lower 12 h after the treatment of low pH Product 2 as compared to that of the high pH Product 1 (p < 0.01).ConclusionThe results of this investigation demonstrated the benefits of 12‐h long lasting and deeper protection of SC acid mantle properties and antimicrobial defense using a low pH skin cleansing product as compared to a high pH product.

Saturday, 24 July 1971, Tower Mill Hotel The man jiggles the brick, gauges its weight. His stout hand, a flash of his watch dial, the sleeve rolled back, muscles on the upper arm bundled tight. His face half-erased by the dark. There’s something going on beneath the surface that Murray can’t grasp. He thinks of the three witches in Polanski’s Macbeth, huddled together on the beach, digging a circle in the sand with bare hands, unwrapping their filthy bundle. A ritual. The brick’s in the air and it’s funny but Murray expected it to spin but it doesn’t, it holds its position, arcs forward, as though someone’s taken the sky and pulled it sideways to give the impression of movement, like those chase scenes in the Punch and Judy shows you don’t see anymore. The brick hits the cement and fractures. Red dust on cops’ shined shoes. Murray feels the same sense of shock he’d felt, sitting in the sagging canvas seat at one of his film nights, recognising the witches’ bundle, a severed human arm, hacked off just before the elbow; both times looking so intently, he had no distance or defence when the realisation came. ‘What is it?’ says Lan. Murray points to the man who threw the brick but she is looking the other way, at a cop in a white riot helmet, head like a globe, swollen up as though bitten. Lan stands on Murray’s feet to see. The pig yells through a megaphone: ‘You’re occupying too much of the road. It’s illegal. Step back. Step back.’ Lan’s back is pressed against Murray’s stomach; her bum fits snugly to his groin. He resists the urge to plant his cold hands on her warm stomach, to watch her squirm. She turns her head so her mouth is next to his ear, says, ‘Don’t move.’ She sounds winded, her voice without force. He’s pinned to the ground by her feet. Again, ‘Step back. Step back.’ Next to him, Roger begins a chant. ‘Springboks,’ he yells, the rest of the crowd picking up the chant, ‘out now!’ ‘Springboks!’ ‘Out now!’ Murray looks up, sees a hand pressed against the glass in one of the hotel’s windows, quickly withdrawn. The hand belongs to a white man, for sure. It must be one of the footballers, although the gesture is out of keeping with his image of them. Too timid. He feels tired all of a sudden. But Jacobus Johannes Fouché’s voice is in his head, these men—the Springboks—represent the South African way of life, and the thought of the bastard Bjelke inviting them here. He, Roger and Lan were there the day before when the footballers pulled up outside the Tower Mill Hotel in a black and white bus. ‘Can you believe the cheek of those bastards?’ said Roger when they saw them bounding off the bus, legs the span of Murray’s two hands. A group of five Nazis had been lined up in front of the glass doors reflecting the city, all in uniform: five sets of white shirts and thin black ties, five sets of khaki pants and storm-trooper boots, each with a red sash printed with a black and white swastika tied around their left arms, just above the elbow. The Springboks strode inside, ignoring the Nazi’s salute. The protestors were shouting. An apple splattered wetly on the sidewalk. Friday, 7 April 1972, St Lucia Lan left in broad daylight. Murray didn’t know why this upset him, except that he had a vague sense that she should’ve gone in the night time, under the cover of dark. The guilty should sneak away, with bowed heads and faces averted, not boldly, as though going for an afternoon walk. Lan had pulled down half his jumpers getting the suitcase from the top of the cupboard. She left his clothes scattered across the bedroom, victims of an explosion, an excess of emotion. In the two days after Lan left, Murray scours the house looking for some clue to where she was, maybe a note to him, blown off the table in the wind, or put down and forgotten in the rush. Perhaps there was a letter from her parents, bankrupt, demanding she return to Vietnam. Or a relative had died. A cousin in the Viet Cong napalmed. He finds a packet of her tampons in the bathroom cupboard, tries to flush them down the toilet, but they keep floating back up. They bloat; the knotted strings make them look like some strange water-dwelling creature, paddling in the bowl. He pees in the shower for a while, but in the end he scoops the tampons back out again with the holder for the toilet brush. The house doesn’t yield anything, so he takes to the garden, circles the place, investigates its underbelly. The previous tenant had laid squares of green carpet underneath, off-cuts that met in jagged lines, patches of dirt visible. Murray had set up two sofas, mouldy with age, on the carpeted part, would invite his friends to sit with him there, booze, discuss the state of the world and the problem with America. Roger rings in the afternoon, says, ‘What gives? We were supposed to have lunch.’ Murray says, ‘Lan’s left me.’ He knows he will cry soon. ‘Oh Christ. I’m so sorry,’ says Roger. Murray inhales, snuffs up snot. Roger coughs into the receiver. ‘It was just out of the blue,’ says Murray. ‘Where’s she gone?’ ‘I don’t know.’ ‘She didn’t say anything?’ ‘No,’ says Murray. ‘She could be anywhere. Maybe you should call the police, put in a missing report,’ says Roger. ‘I’m not too friendly with the cops,’ says Murray, and coughs. ‘You sound a bit crook. I’ll come over,’ says Roger. ‘That’d be good,’ says Murray. Roger turns up at the house an hour later, wearing wide pants and a tight collared shirt with thick white and red stripes. He’s growing a moustache, only cuts his hair when he visits his parents. Murray says, ‘I’ll make us a cuppa.’ Roger nods, sits down at the vinyl table with his hands resting on his knees. He says, ‘Are you coming to 291 on Sunday?’ 291 St Paul’s Terrace is the Brisbane Communist Party’s headquarters. Murray says, ‘What’s on?’ ‘Billy needs someone to look after the bookshop.’ Murray gives Roger a mug of tea, sits down with his own mug between his elbows, and cradles his head in his hands so his hair falls over his wrists. After a minute, Roger says, ‘Does her family know?’ Murray makes a strange noise through his hands. ‘I don’t even know how to contact them,’ he says. ‘She wrote them letters—couldn’t afford to phone—but she’s taken everything with her. The address book. Everything.’ Murray knows nothing of the specifics of Lan’s life before she met him. She was the first Asian he’d ever spoken to. She wore wrap-around skirts that changed colour in the sun; grew her hair below the waist; sat in the front row in class and never spoke. He liked the shape of her calf as it emerged from her skirt. He saw her on the great lawn filming her reflection in a window with a Sony Portapak and knew that he wanted her more than anything. Murray seduced her by saying almost nothing and touching her as often as he could. He was worried about offending her. What reading he had done made him aware of his own ignorance, and his friend in Psych told him that when you touch a girl enough — especially around the aureole — a hormone is released that bonds them to you, makes them sad when you leave them or they leave you. In conversation, Murray would put his hand on Lan’s elbow, once on the top of her head. Lan was ready to be seduced. Murray invited her to a winter party in his backyard. They kissed next to the fire and he didn’t notice until the next morning that the rubber on the bottom of his shoe melted in the flames. She moved into his house quickly, her clothes bundled in three plastic bags. He wanted her to stay in bed with him all day, imagined he was John Lennon and she Yoko Ono. Their mattress became a soup of discarded clothes, bread crumbs, wine stains, come stains, ash and flakes of pot. He resented her when she told him that she was bored, and left him, sheets pulled aside to reveal his erection, to go to class. Lan tutored high-schoolers for a while, but they complained to their mothers that they couldn’t understand her accent. She told him her parents wanted her to come home. The next night he tidied the house, and cooked her dinner. Over the green peas and potato—Lan grated ginger over hers, mixed it with chili and soy sauce, which she travelled all the way to Chinatown on a bus to buy—Murray proposed. They were married in the botanic gardens, surrounded by Murray’s friends. The night before his father called him up and said, ‘It’s not too late to get out of it. You won’t be betraying the cause.’ Murray said, ‘You have no idea what this means to me,’ and hung up on him. Sunday, 9 April 1972, 291 St Paul’s Terrace Murray perches on the backless stool behind the counter in The People’s Bookshop. He has the sense he is on the brink of something. His body is ready for movement. When a man walks into the shop, Murray panics because Billy hadn’t shown him how to use the cash register. He says, ‘Can I help?’ anyway. ‘No,’ says the man. The man walks the length of the shelves too fast to read the titles. He stops at a display of Australiana on a tiered shelf, slides his hand down the covers on display. He pauses at Crocodile Hunt. The cover shows a drawing of a bulky crocodile, scaled body bent in an S, its jaws under the man’s thumb. He picks it up, examines it. Murray thinks it odd that he doesn’t flip it over to read the blurb. He walks around the whole room once, scanning the shelves, reaches Murray at the counter and puts the book down between them. Murray picks it up, turns it over, looking for a price. It’s stuck on the back in faded ink. He opens his mouth to tell the man how much, and finds him staring intently at the ceiling. Murray looks up too. A hairline crack runs along the surface and there are bulges in the plaster where the wooden framework’s swollen. It’s lower than Murray remembers. He thinks that if he stood on his toes he could reach it with the tips of his fingers. Murray looks down again to find the man staring at him. Caught out, Murray mutters the price, says, ‘You don’t have it in exact change, do you?’ The man nods, fumbles around in his pocket for a bit and brings out a note, which he lays at an angle along the bench top. He counts the coins in the palm of his hand. He makes a fist around the coins, brings his hand over the note and lets go. The coins fall, clinking, over the bench. One spins wildly, rolls past Murray’s arm and across the bench. Murray lets it fall. He recognises the man now; it is the act of release that triggers the memory, the fingers spread wide, the wrist bent, the black watch band. This is the man who threw the brick in the Springbok protest. Dead set. He looks up again, expecting to see the same sense of recognition in the man, but he is walking out of the shop. Murray follows him outside, leaving the door open and the money still on the counter. The man is walking right along St Paul’s Terrace. He tucks the book under his arm to cross Barry Parade, as though he might need both hands free to wave off the oncoming traffic. Murray stands on the other side of the road, unsure of what to do. When Murray came outside, he’d planned to hail the man, tell him he recognised him from the strike and was a fellow comrade. They give discounts to Communist Party members. Outside the shop, it strikes him that perhaps the man is not one of them at all. Just because he was at the march doesn’t make him a communist. Despite the unpopularity of the cause —‘It’s just fucking football,’ one of Murray’s friends had said. ‘What’s it got to do with anything?’— there had been many types there, a mixture of labour party members; unionists; people in the Radical Club and the Eureka Youth League; those not particularly attached to anyone. He remembers again the brick shattered on the ground. It hadn’t hit anyone, but was an incitement to violence. This man is dangerous. Murray is filled again with nervous energy, which leaves him both dull-witted and super-charged, as though he is a wind-up toy twisted tight and then released, unable to do anything but move in the direction he’s facing. He crosses the road about five metres behind the man, sticks to the outer edge of the pavement, head down. If he moves his eyes upwards, while still keeping his neck lowered, he can see the shoes of the man, his white socks flashing with each step. The man turns the corner into Brunswick Street. He stops at a car parked in front of the old Masonic Temple. Murray walks past fast, unsure of what to do next. The Temple’s entry is set back in the building, four steps leading up to a red door. Murray ducks inside the alcove, looks up to see the man sitting in the driver’s seat pulling out the pages of Crocodile Hunt and feeding them through the half wound-down window where they land, fanned out, on the road. When he’s finished dismembering the book, the man spreads the page-less cover across the back of the car. The crocodile, snout on the side, one eye turned outwards, stares out into the street. The man flicks the ignition and drives, the pages flying out and onto the road in his wake. Murray sits down on the steps of the guild and smokes. He isn’t exactly sure what just happened. The man must have bought the book just because he liked the picture on the front of the cover. But it’s odd though that he had bothered to spend so much just for one picture. Murray remembers how he had paced the shop and studiously examined the ceiling. He’d given the impression of someone picking out furniture for the room, working out the dimensions so some chair or table would fit. A cough. Murray looks up. The man’s standing above him, his forearm resting on the wall, elbow bent. His other arm hangs at his side, hand bunched up around a bundle of keys. ‘I wouldn’t of bothered following me, if I was you,’ the man says. ‘The police are on my side. Special branch are on my side.’ He pushes himself off the wall, stands up straight, and says, ‘Heil Hitler.’ Tuesday April 19, 1972, 291 St Paul’s Terrace Murray brings his curled fist down on the door. It opens with the force of his knock and he feels like an idiot for even bothering. The hallway’s dark. Murray runs into a filing cabinet, swears, and stands in the centre of the corridor, with his hand still on the cabinet, calling, ‘Roger! Roger!’ Murray told Roger he’d come here when he called him. Murray was walking back from uni, and on the other side of the road to his house, ready to cross, he saw there was someone standing underneath the house, looking out into the street. Murray didn’t stop. He didn’t need to. He knew it was the man from the bookshop, the Nazi. Murray kept walking until he reached the end of the street, turned the corner and then ran. Back on campus, he shut himself in a phone box and dialed Roger’s number. ‘I can’t get to my house,’ Murray said when Roger picked up. ‘Lock yourself out, did you?’ said Roger. ‘You know that Nazi? He’s back again.’ ‘I don’t get it,’ said Roger. ‘It doesn’t matter. I need to stay with you,’ said Murray. ‘You can’t. I’m going to a party meeting.’ ‘I’ll meet you there.’ ‘Ok. If you want.’ Roger hung up. Now, Roger stands framed in the doorway of the meeting room. ‘Hey Murray, shut up. I can hear you. Get in here.’ Roger switches on the hallway light and Murray walks into the meeting room. There are about seven people, sitting on hard metal chairs around a long table. Murray sits next to Roger, nods to Patsy, who has nice breasts but is married. Vince says, ‘Hi, Murray, we’re talking about the moratorium on Friday.’ ‘You should bring your pretty little Vietnamese girl,’ says Billy. ‘She’s not around anymore,’ says Roger. ‘That’s a shame,’ says Patsy. ‘Yeah,’ says Murray. ‘Helen Dashwood told me her school has banned them from wearing moratorium badges,’ says Billy. ‘Far out,’ says Patsy. ‘We should get her to speak at the rally,’ says Stella, taking notes, and then, looking up, says, ‘Can anyone smell burning?’ Murray sniffs, says ‘I’ll go look.’ They all follow him down the hall. Patsy says, behind him, ‘Is it coming from the kitchen?’ Roger says, ‘No,’ and then the windows around them shatter. Next to Murray, a filing cabinet buckles and twists like wet cardboard in the rain. A door is blown off its hinges. Murray feels a moment of great confusion, a sense that things are sliding away from him spectacularly. He’s felt this once before. He wanted Lan to sit down with him, but she said she didn’t want to be touched. He’d pulled her to him, playfully, a joke, but he was too hard and she went limp in his hands. Like she’d been expecting it. Her head hit the table in front of him with a sharp, quick crack. He didn’t understand what happened; he had never experienced violence this close. He imagined her brain as a line drawing with the different sections coloured in, like his Psych friend had once showed him, except squashed in at the bottom. She had recovered, of course, opened her eyes a second later to him gasping. He remembered saying, ‘I just want to hold you. Why do you always do this to me?’ and even to him it hadn’t made sense because he was the one doing it to her. Afterwards, Murray had felt hungry, but couldn’t think of anything that he’d wanted to eat. He sliced an apple in half, traced the star of seeds with his finger, then decided he didn’t want it. He left it, already turning brown, on the kitchen bench. Author’s Note No one was killed in the April 19 explosion, nor did the roof fall in. The bookstore, kitchen and press on the first floor of 291 took the force of the blast (Evans and Ferrier). The same night, a man called The Courier Mail (1) saying he was a member of a right wing group and had just bombed the Brisbane Communist Party Headquarters. He threatened to bomb more on Friday if members attended the anti-Vietnam war moratorium that day. He ended his conversation with ‘Heil Hitler.’ Gary Mangan, a known Nazi party member, later confessed to the bombing. He was taken to court, but the Judge ruled that the body of evidence was inadmissible, citing a legal technicality. Mangan was not charged.Ian Curr, in his article, Radical Books in Brisbane, publishes an image of the Communist party quarters in Brisbane. The image, entitled ‘After the Bomb, April 19 1972,’ shows detectives interviewing those who were in the building at the time. One man, with his back to the camera, is unidentified. I imagined this unknown man, in thongs with the long hair, to be Murray. It is in these gaps in historical knowledge that the writer of fiction is free to imagine. References “Bomb in the Valley, Then City Shots.” The Courier Mail 20 Apr. 1972: 1. Curr, Ian. Radical Books in Brisbane. 2008. 24 Jun. 2011 < http://workersbushtelegraph.com.au/2008/07/18/radical-books-in-brisbane/ >. Evans, Raymond, and Carole Ferrier. Radical Brisbane: An Unruly History. Brisbane: Vulgar Press, 2004.