放射虫Cecrops septemporatus带在世界各地的瓦兰今阶广泛分布,中国最早在上世纪八、九十年代发现于藏南日喀则地区雅鲁藏布蛇绿岩南侧的下鲁硅岩中.本文对相关样品(80-141)进行再研究,描述放射虫18属23种,包括3个新种.该放射虫组合具有 Aurissaturnalis variabilis variabilis(Squinabol),Thanarla elegantissima(Cita),Pantanellium corriganensis Pessagno等重要带化石,可与江孜地区混杂堆积和泽当地区蛇绿混杂岩的硅质岩中发现的相关组合及国际同类放射虫生物带进行比较,为全面认识该时期全球放射虫组合面貌及区域对比提供新的证据.

Guangxi region lies in the South China, facing the South China Sea on the south and jointing with Vietnam on the southwest. Traditionally it is regarded as an area where shallow shelves coexisted with deep basins on the platform background during Late Paleozoic. In recent years we found the depositional alternations of the cherts, siliceous limestones and thick piles of pillowed or massive basalts in the western Guangxi. Conodont fossils indicate the sequence ranging from Late Devonian to Late Permian in age, The obvious negative Ce anomaly and other geochemical characteristics of the cherts mean that they formed in deep-water pelagic environment with hydrothermal input. The geochemical compositions of the basalts also show an oceanic within-plate setting. Meanwhile, in the southern Guangxi from a continuous radiolarian chert sequence 11 radiolarian assemblages and 10 conodont zones from Late Devonian to Late Permian were recognized. The radiolarian assemblages can well-be correlated with those from western Yunnan and Japan. Those discoveries suggest that during the Late Paleozoic most part of Guangxi be possibly occupied by the oceanic environment. Some areas in Guangxi are covered with Late Paleozoic weakly deformed platform-type carbonate rocks. However, the lack of terrigeneous detritus and the presence of negative Ce anomaly from the intercalated siliceous beds indicate a pelagic setting for these carbonate rocks. They might be accumulated on the submerged highlands which emerged sometimes and formed an archipelago between the Yangtze and Indochina blacks.

雅鲁藏布江缝合带是青藏高原上最年轻的一条缝合带,位于青藏高原南端,记录了随着印度大陆向北漂移并最终与欧亚大陆碰撞而消亡的新特提斯洋的演化历史.藏南地区的硅质地层呈东西向断断续续延伸达数千公里,分布于缝合带蛇绿岩南北两侧和特提斯喜马拉雅沉积区.在这些硅质岩地层中发现的放射虫时代从中三叠世安尼期至晚古新世坦尼特期,揭示了特提斯海盆从中三叠世开始,至早白垩世发展为成熟大洋,然后在晚古新世之后闭合的演化过程.不过,目前还欠缺阿普特阶之后到古新世早期的含放射虫深海沉积的确切证据.已报道的晚白垩世的放射虫时代以及萨嘎附近含古新世放射虫地层的时代和构造属性仍存在很大争议.缝合带南北两侧已报道的中—晚三叠世、早—中侏罗世和晚侏罗世—早白垩世早期的放射虫化石均来自于混杂岩中的硅质岩岩块.硅质泥岩和碎屑岩代表了新特提斯洋由远洋环境逐渐到达俯冲边界的重要阶段.目前硅质泥岩基质和碎屑岩中放射虫的研究并未引起足够重视.加强放射虫动物群的全球对比,尤其是东西特提斯洋放射虫动物群的对比,在藏南地区展开系统的高精度的放射虫生物地层研究对完善放射虫化石分带、阐明新特提斯洋的演化、分析特提斯洋俯冲过程和限定印度-欧亚大陆碰撞时限等都具有重要意义.

We integrated our new data with a review of published work on the Indo-Myanmar Orogenic Belt (IMOB) of the eastern Neotethys in Myanmar, western Yunnan (China) and Naga Hills (India), in order to better understand subduction-accretion processes of the Neotethys Ocean in SE Asia, and interactive relationships between the Gondwana and Laurasia supercontinents. From east to west, the IMOB is divided into three geographic units, the Shan-Thai Plateau, Myanmar Central Basin and Indo-Burma Range; the Mogok Metamorphic and Slate Belt is within the Shan-Thai Plateau. The Shan-Thai Plateau and eastern Myanmar Central Basin contain Paleozoic sedimentary successions, low-grade to amphibolitic facies metamorphic rocks, and the Luxi ultramafic and Myiticyina-Mogok ultramaficdiorite belts. Unmetamorphosed and metamorphosed sediments have similar detrital zircon age peaks of 1000 Ma, and 700 Ma or 500 Ma, and they are separated by the Luxi ultramafic belt, whose epsilon(Nd)(0) and Sr-87/Sr-86((i)) values are similar to surrounding granite, diorite and migmatite and the gamma Os = -4.8 similar to -8.8 is indicative of old sub-continental lithospheric mantle, rather than an oceanic suture zone. These data and relations suggest that these regions belong to the Cimmerian continental sliver, derived from the Gondwana supercontinent. The Myitkyina-Mogok ultramafic-diorite belt, located along the eastern margin of the Myanmar Central Basin that was associated with the continental sliver, contains peridotite, andesite, hornblende gabbro, diorite, granodiorite and plagiogranite, all with arc geochemical signatures and ages of 177-166 Ma. The source region of some of these igneous rocks contains a component of EM1, which is close to low Sr-87/Sr-86((i)) ratio of a migmatite in the Cimmerian continental sliver as shown by Sr-Nd isotopes values, suggesting this belt developed as a Jurassic continental margin arc. The Mogok Metamorphic and Slate Belt contains granodiorite, diorite, tonalite, granite and migmatite extending from the Gongshan, Tengchong and Luxi areas in western Yunnan (China) to Mandalay, Kalaw, Padatchaung and Moulmein in Myanmar. These rocks have arc geochemical character and yield ages of 185-170 Ma, 128-112 Ma, 91 Ma and 75-45 Ma, suggesting development of four episodes of arc magmatism. Along the central axis of the Myanmar Central Basin there are magmatic arc-related 106-94 Ma diorite, granodiorite and tonalite, as well as Eocene and Neogene-Present (38-0 Ma) andesite, dacite, trachyte and rhyolite. Accretion took place along the central axis of the Myanmar Central Basin towards the Indo-Burma Range, and westward to the present trench axis on the margin of the Indian Ocean, as shown by westward younging of accretionary complexes and trench-slope basins. A Jurassic accretionary complex, located in the Hpakan area in the north of the Myanmar Central Basin, contains 189-147 Ma high-pressure metamorphic rocks such as jadeitite, garnet-mica schist and glaucophane schist. In the eastern belt of the Indo-Burma Range Early Cretaceous (119-115 Ma) accretionary complexes consist of upper plate Triassic unmetamorphosed and low-grade metamorphic sediments, and lower plate amphibolites, high-pressure metamorphic rocks and Jurassic-Early Cretaceous oceanic plate stratigraphy containing MORB- and OIB-type basalts and thin-bedded radiolarian cherts. Late Early Cretaceous (similar to 100 Ma) and Late Cretaceous to Middle Eocene (75-45 Ma) trench-slope basin deposits, containing abundant fossil plants and shallow-water sedimentary structures, cover most of the Indo-Burma Range, where sediments rest with an angular unconformity on older accretionary complexes. The presence of earlier magmatic arcs, accretionary complexes and trench-slope basins suggests that the present trench on the margin of the Indian Ocean has evolved by continuous eastward subduction since the Jurassic. The magmatic arc axis migrated eastward (landward) during some time periods (Jurassic to Early Cretaceous, and Late Cretaceous to Middle Eocene) and westward (seaward) migration during others (Early Cretaceous to late Early Cretaceous, and Middle Eocene to Present), during continuous east-dipping subduction.

Cretaceous radiolarian cherts are widely exposed on both sides of the Yarlung Zangbo ophiolite belt,southern Tibet,China.They formed in various tectonic-sedimentary settings and provides abundant information for understanding the evolutionary history of the Tethyan ocean in southern Tibet.In order to know ages of these cherts,it is necessary to establish a regional Cretaceous radiolarian zonation in southern Tibet.This study re-analyzed the sample(80-R1)containing an abundant earliest Cretaceous radiolarian fauna from an olistolith of the Zongzhuo Formation in Jiangzi district (Wu and Li,1982).A total of 29 species,including 6 new species,are described in this paper.There are 13 commonly occurring species with coeval radiolarian fauna in Oman (Dumitrica et al.,1997),of which Loopus yangi Dumitrica and Stichocapsa labyrinthica Dumitrica are restricted in Berriasian strata in Oman.The genera Godia Wu and Becus Wu are abundant in both faunas and the former appeared first in Berriasian.Besides,Obesacapsula polyedra (Steiger) is an important Berriasian taxon in California (Pessagno et al.,2009).It is worth noting that there are few common taxa between this radiolarian assemblage and the Pseudodictyomotra carpatica zone (KR1) of Matsuoka et al.(2002) from the Xialu chert in southern Tibet,assigned to late Tithonian-early Valanginian.The presence of Eucyrtidiellum pyramis in KR1 and its faunal similarity with the basal part containing Loopus primitivus of the west Pacific P.carpatica zone (Matsuoka et al.,2005) indicate that the age of Xialu fauna (KR1) is likely of late Tithonian.

晚泥盆世晚期-早石炭世早期,是新疆准噶尔洋盆发育的最后阶段.西准噶尔的太勒古拉组以暗色泥质凝灰岩为主,夹红色放射虫硅质岩,覆于巨厚玄武岩层之上,是该时期洋盆宝贵的地层记录.早石炭世维宪期,东准噶尔卡拉麦里洋盆封闭,准噶尔中西部成为相对闭塞的残余洋盆.太勒古拉组之上的包古图组和希贝库拉斯组,记录了残余洋盆充填消亡的过程.包古图组以灰绿色凝灰质泥岩、粉砂岩和细砂岩的韵律层为主,属于中下扇的火山浊积岩系,时代为维宪期-巴什基尔早期.希贝库拉斯组以厚层-块状、细-粗粒凝灰质砂岩为主,上部有厚层含中酸性火山岩砾石的砾岩,是具有上扇沉积特征的火山浊积岩系,时代为晚石炭世巴什基尔晚期至莫斯科期或更晚.石炭纪洋盆充填过程中,堆积了很厚的暗色沉积岩系,提供了良好的生烃条件.东准噶尔石炭纪沉积岩相复杂,与西准噶尔有很大差别.盆地周缘的地层对比和岩相古地理研究,有助于解决盆地内部的石炭系地层问题.

Devonian-Carboniferous radiolarian cherts are widely distributed in southwestern Tians-han,and formed a deep-water sedimentary belt from the Dushanzi-Kuqa highway on the east to the Aheqi area on the west. The radiolarian cherts ranging from the late Middle Devonian to early Visean of Early Carboniferous were found along the Dushanzi-Kuqa highway,and may be used the name"Kulehu Formation". Studies of the biostratigraphy and sedimentary facies on the succession from the Pridolian Keke-tiekedaban Formation through the Lower Devonian Artengkesi Formation to the Kulehu Formation indicate the evolution of South Tianshan Ocean from shallow marine to deep oceanic basin. The South Tianshan Ocean was a small oceanic basin caused by rifting of the continental shelf on north Tarim margin. Tectono-palaeogeographic and palaeobiogeographic studies indicate that the South Tianshan Ocean was a branch ofthe Palaeo-Tethys and not belongs to the scope of the Palaeo-Asian Ocean. The spreading of branches of the Palaeo-Tethys on the south to Tarim in the Early Carboniferous and afterwards led the drifting northward of Tarim and the closing of the South Tianshan Ocean and the Palaeo-Asian Ocean in Junggar and north Tianshan region.

The Cretaceous radiolarian fossils are of great variety.So far it is difficult to correlate their zonations bet-ween different regions in the world.In the southern Tibet Cretaceous radiolarian cherts are widespread and radiolarian assemblages with varying ages have been reported.Further paleontological and biostratigraphical work remains to be done.O'Dogherty(1994)proposed a valuable mid-Cretaceous radiolarian zonation for the western Mediterranean region.However,some radiolarian genera and species from Cenomanian Congdu Formation in the southern Tibet were regarded as Aptian taxa in his work,that led to some errors in the stratigraphic correlation.In this paper 23 radiolarian taxa from a limestone sample(80-153)of the Congdu Formation are shown in Plate 1.They are conspecific or closely related to those forms described by O'Dogherty(1994).Their stratigraphic ranges provided by O'Dogherty(1994)indicate that the radiolarian assemblage of the Congdu Formation is most appropriate to be correlated with early Cenomanian Spica Subzone in the western Mediterranean region.

采样点位于314国道旁,库尔勒市北东缘,距市中心仅约10 km(图1).样品采集于兴地塔格群中所夹的一个硅岩块,硅岩块出露面积约10 m2,上直接覆以更新.全新世砾岩.该硅岩块发生了一定的重结晶作用,放射虫化石的保存很差,给放射虫化石的分离和鉴定造成了很大的困难.我们先后3次到该岩块采集共计32块硅岩样品,多次反复分析,终于发现了16颗放射虫化石个体,包括:Albaillella paradoxa Deflandre,Albaillella cf.paradoxa Deflandre和Albaillella sp..这是一个早石炭世早期的放射虫化石组合.

Turbocapsula costata(Wu)——the index taxon of the Aptian radiolarian subzone(O’Dogherty, 1994) in western Mediterranean regions originated from Tricapsula costata Wu of the Cenomanian Chongdui Formation in southern Tibet. In 2002, Matsuoka et al. correlated their uppermost radiolarian zone of the Xialu Chert in southern Tibet with the subzone and called it Turbocapsula costata Zone. Therefore, the Aptian age of the Chongdui Formation was also considered by them. However, although the test outline of Turbocapsula costata(Wu) from the western Mediterranean regions and Tricapsula costata Wu of the Chongdui Formation is similar, some important differences exist in their structure. They are not of one same species, or even same genus. The former needs to be renamed. Meantime, the Turbocapsula costata(Wu) from the Xialu Chert should be Tricapsula costata Wu based on the characters shown in its picture. The top part of the Xialu Chert is, therefore, as young as Cenomanian.

南天山西端的乌帕塔尔坎群为一套灰色、深灰色细碎屑岩,夹火山岩、硅岩和碳酸盐岩,其中分布有一些超基性岩(块).以往曾据灰岩夹层中的化石将其划归志留系-中泥盆统或前泥盆系.我们对乌帕塔尔坎群中所采集的24块硅岩样品进行室内分离和鉴定,发现的放射虫化石主要有Albaillella sp.cf A.undulata Deflandre,Albaillella sp.cf A.paradoxa Deflandre,Albaillella cf.A.deflandrei Gourmelon,Albaillella sp.cf.A.indensis Won,Albaillella sp.cf.Albaillella excelsa Ishiga,Kito and Imoto,Albaillella sp.和Latentifistulidae gen.et.sp.indet..其中可划分出两个放射虫化石组合,一个是以Albaillella sp.cf A.undulata Deflandre,Albaillella sp.cf A.paradoxa Deflandre,Albaillella cf.A.deflandrei Gourmelon和Albaillella sp.cf.A.indensis Won为代表的早石炭世早期的化石组合;另一个是以Albaillella sp.cf.Albaillella excelsa Ishiga,Kito and Imoto为代表的晚二叠世化石组合.说明乌帕塔尔坎群至少可能包含有志留系到二叠系不同时代的岩石,可能是蛇绿混杂岩.这是该群首次发现放射虫化石,特别是再次发现晚二叠世放射虫化石,进一步证实了南天山西段晚二叠世(残余)古洋盆存在的可能性.

The Jiangshan-Shaoxing Fault is generally regarded as the boundary bet ween the Yangtze Block and Cathaysian Block in the Lower Yangtze Area.However, it was a suture formed in the Proterozoic.The relationship between the Yangtze and Cathaysian Blocks during the Caledonian Period is still a problem.The Proteroz o ic metamorphic rocks form the core part of an anticlinorium in northeastern Jian gxi and southern Anhui.The Cambrian and Ordovician sediments on its two limbs v ary from basin-slope facies to platform facies from insides toward outsides.Th e facies boundaries mark the Yangtze Platform margin along a line from Shitai to Jingxian in southern Anhui,and the Cathaysian Platform margin along a line from Jiangshan through Kaihua to Lin'an in western Zhejiang during the Cambri an and Ordo vician.The intermediate area occupied by metamorphic rocks was a part of the " J iangnan Basin" at that time.An important change on the sedimentary pattern hap p ened at the end of Ordovician.This area transferred into a tapered "Jiangnan U plift":a terrigenous material source area.The deformation of the Cambrian and Ordovician sedimentary rocks in two limbs of the anticlinorium becomes stronger from outsides toward insides where the isoclinal and overturned folds appear.T his indicates that the Jiangnan Uplift belongs to a Caledonian fold belt.The Si lurian terrigenous sediments with large thickness occur on both sides of the Jia ngnan Uplift and its northeast.The sedimentary sequences vary from shallow mari ne sediments upwards into littoral or deltaic sediments and finally into non-ma r ine sediments.The marine sediments become increasingly abundant towards northea st and developed in later Silurian in Jiangsu Province.Here the Silurian rocks are overlain disconformably by the Devonian.They were probably deformed until the Indosinian period.The Caledonian foldbelt and Indosinian foldbelt coe xist between the Yangtze and Cathaysian Blocks in Lower Yangtze Area.

南天山西端的乌帕塔尔坎群,主要为一套灰色、深灰色细碎屑岩,夹火山岩、硅岩和碳酸盐岩.其中分布有一些超基性岩(块).

Kurgan is a frontier station at the western terminal of Chinese South Tianshan, NW margin of the Tarim Basin, where the Mesozoic coal-bearing molasse formation well developed. 30 specimens of chert gravel were collected from the bottom of conglomerate of the Middle-Upper Triassic Kelamayi Formation, from which 46 individual radiolarian fossils were found from 12 specimens. The fossils included Albaillella paradoxa Deflandre, Albaillella sp. cf. Albaillella paradoxa Deflandre, Albaillella sp., Latentifistula sp., Latentifistulidae gen. et sp. indet., Follicucullus sp. aff. Follicucullus bipartitus Caridroit et De Wever, Follicucullus sp. and Spumellaria gen. et sp. indet. Two radiolarian assemblages could be identified: one being early Early Carboniferous assemblage represented with Albaillella paradoxa and Albaillella sp. cf. Albaillella paradoxa, another being Middle-Late Permian assemblage represented with Follicucullus sp. and Follicucullus sp. aff. Follicucullus bipartitus. This new discovery indicated the Carbono-Permian chert provenance for Triassic deposits in Kurgan region, which might be from ophiolitic mélange of the Chinese South Tianshan orogenic belt.

Some radiolarian fossils were discovered two times in the carbonaceous silicalites, the major gold-bearing rocks in the Changkeng gold-silver deposit. The geologic period of the fossils may belong to Early Carboniferous epoch. Meanwhile, some biological remains were also found in this kind of rocks, such as quartz ring, quartz loop, quartz monocrystal sphere, quartz polycrystal sphere, biological relic and homologous organic texture. Based on these facts, it is considered that these carbonaceous silicalites contained some microbiofossils formerly, generated in sea basin and belong to sedimentary origin. They are strong evidences to prove that the carbonaceous silicalites derived from sedimentary exhalation, and not from hydrothermal alteration-metasomatism. Besides, these facts indicate that some biological material joined in the sedimentary exhalation course, and sedimentary exhalation and organosedimentation could mix each other at a place. They also show that the Changkeng deposit was formed in an extensional, starved and relatively deep-water basin. Finally, a doubt is put forward that whether the lithostratigraphic unit of the strata in Changkeng area is right or not.

晚古生代-三叠纪,滇黔桂三省区和越南北部有南盘江海长期发育.地质构造上,北面为扬子地块,东南有云开地块和大明山微陆块,西南有越北地块.南盘江海内部有北部的田林海盆,中部的八布洋盆和南部的钦防海盆.中间有许多大小不一的海下台地,最大的是大明山台地,其次是靖西台地和西畴台地.早泥盆世晚期南盘江海的张开,可能是冈瓦纳板块反时针旋转、扬子地块北移,使其间滇桂-越北地块裂解的结果.进一步的海底扩张导致早石炭世时八布海盆出现洋壳,南盘江海成为南北超过20个纬度的小洋盆.古地理再造表明,八布海盆的扩张脊可能连接西面哀牢山海的洋脊.晚二叠世云开地块北移,与大明山微陆块碰撞.早三叠世印支地块北移,和越北地块会聚.晚二叠世-中三叠世南盘江海南缘出现活动陆缘.晚三叠世印支-越北地块与扬子地块会聚,南盘江海闭合.南盘江海和哀牢山海及昌宁-孟连海的发生、发展和消亡基本同步,可能属古特提斯同一洋脊系统控制.

对赣东北蛇绿混杂岩带相关地层的时代、沉积相和接触关系等方面认识的重大分歧,导致对华南地质演化史的不同解释.混杂岩的深成岩块体的同位素年龄数据大都在900～1 000 Ma之间,伴生的火山-沉积岩系(登山群)中却有古生代微体化石发现,但化石的确切年代尚难确定.古地理分析表明,赣东北地区早古生代并不存在"江南古陆",却有深水的江南海盆.华南晚奥陶世火山碎屑沉积广泛分布,但来源不明,赣东北有可能为当时喷发中心,形成于火山岛弧环境的登山群正好与之匹配.因而,其时代可能为晚奥陶世.志留纪早期江南海盆封闭,扬子地块和华夏地块之间形成加里东褶皱带,赣东北蛇绿岩带为加里东褶皱带和华夏地块之间的接合带.这里扬子地块和华夏地块的距离最近,挤压程度高,抬升幅度大,剥蚀时间长,早古生代沉积不易保存,登山群可能是残留部分.

The Aiketik Group, distributed at the western end of the South Tianshan Mountains, China, is an important lithostratigraphic unit involved in the South Tianshan orogen. It is separated from the adjacent rocks by faults. Generally, the geologists ascribed it to the Upper Carboniferous according to Pseudostaffella sp., Profusulinella sp. and Fusulinella sp. found from the limestone and sandy limestone of Aiketik. Our radiolarian fossils were obtained from the chert samples collected from the Haladaok section located at the upper Tuoshihan River. The fossils mainly include Albaillella undulata Deflandre, Albaillella paradoxa Deflandre, Albaillella sp. aff. A. paradoxa Deflandre, Albaillella sp. cf. A. deflandrei Gourmelon, Albaillella sp., Albaillella excelsa Ishiga, Kito and Imoto (?), Belowea variabilis (Ormiston et Lane), Callella cf. C. parvispinosa Won, Entactinia cf. E. tortispina Ormiston et Lane, Entactinia aff. E. tortispina Ormiston et Lane, Entactinia variospina Won, Entactinia sp., Eostylodictya rota (Won), Latentifistula impella (Ormistone et Lane) (?), Latentifistula turgida Omiston et Lane, Latentifistulidae gen. et. sp. indet. and Polyentactinia cf. aranea Gourmelon. Among them, Albaillella excelsa Ishiga, Kito and Imoto (?) is a Late Permian species with some elements uncertain as there is only one poorly-preserved fossil of this species found so far. And two radiolarian assemblages can be identified from the other fossils. One is the early Early Carboniferous assemblage represented by Albaillella undulata Deflandre, Albaillella paradoxa and Albaillella sp. cf. A. deflandrei Gourmelon. And the other is the late Early Carboniferous assemblage represented by Eostylodictya rota (Won). This is the first discovery of radiolarian fossils in the Aiketik Group, also the first discovery of Late Permian radiolarian fossils in the South Tianshan Mountains. Meanwhile, this is the current westernmost sampling site of radiolarian fossils in the South Tianshan Mountains.

中国南天山西端的艾克提克群是卷入南天山造山带的一个重要的岩石地层单元,其与相邻地层单元均以断层接触.以往根据在其灰岩和砂质灰岩中发现的Pseudostaffella sp.,Profusulinella sp.和Fusulinella sp.将其归属于上石炭统.我们的放射虫化石发现于托什罕河上游的哈拉道克剖面,主要包括Albaillella undulata Deflandre,Al-baillella paradoxa Deflandre, Albaillella sp. aff. A. paradoxa Deflandre, Albaillella sp. cf. A. deflandrei Gourelon,Albaillella sp., Albaillella excelsa Ishiga, Kito and Imoto (?), Belowea variabilis (Ormiston et Lane), Callella cf. C.parvispinosa Won, Entactinia cf. E. tortispina Ormiston et Lane, Entactinia aff. E. tortispina Ormiston et Lane, En-tactinia variospina Won, Entactinia sp., Eostylodictya rota (Won), Latentifistula impella (Ormistone et Lane) (?), La-tentifistula turgida Omiston et Lane, Latentifistulidae gen. et. sp. indet. 和 Polyentac tinia cf. aranea Gourmelon. 其中,Albaillella excelsa Ishiga,Kito and Imoto(?)的时代为晚二叠世(存疑),其余可以划分出早石炭世早期和晚期两个放射虫化石组合:前者以Albaillella undulata Deflandre,Albaillella paradoxa Deflandre和Albaillella sp.cf. A.deflan-dre Gourmelon为代表,后者以Eostylodictya rota(Won)为代表.这是艾克提克群中首次发现放射虫化石,同时是在中国南天山首次发现晚二叠世放射虫化石,也是中国南天山最西部的放射虫化石点,具有重要的地质研究意义.

中国南天山西端的艾克提克群是卷入南天山造山带的一个重要的岩石地层单元,其与相邻地层单元均以断层接触。以往根据在其灰岩和砂灰岩中发现的PseudostaffellasP.、Profusulinella sp·和Fusulinella sp.将其归属于上石炭统。我们的放射虫化石发现于托什罕河上游的哈拉道克剖面,主要包括Albaillella undulata Deflandre、Albaillellaparadoxa Deflandre、Albaillella sp.aff.A.paradoxa De-flandre、Albaillella sp.cf.A.deflandrei Gourmelon、Albail-